black.ai

PsiQuantum is seeking an Integrated Photonics Engineer in Daresbury, United Kingdom, to support advanced photonic circuit characterization for their quantum computing platform. The role involves designing experiments, testing intricate optical circuits, and automating experimental workflows using Python. Ideal candidates should hold a PhD, have a robust experimental background in integrated optics, and demonstrate hands-on experience with essential optical components. Attractive salary range is £45,000 - £55,000 GBP, alongside a comprehensive benefits package.

black.ai is looking for a founding full-stack engineer in Shoreditch, London. You will own the entire tech stack and collaborate directly with the CEO and other team members. A competitive compensation package of £160-170k includes both salary and shares, designed for those willing to invest fully in a mission-driven adventure. The ideal candidate will possess a software engineering degree, relevant project experience, and a strong desire to learn. We prioritize team support and work-life balance while building a groundbreaking AI-centric marketplace.

Kiki founding full-stack engineer JD Location: Shoreditch, London (in-person 5/6 days a week) Total compensation: £160-170k (split between salary and shares) This JD is just a snippet and to apply you need to read our bigger hiring manifesto doc to have a clear understanding of what you'll be building and joining us entails. How to apply? Link is at the bottom of hiring manifesto below About Kiki Kiki is an invite-only sublet club. We're not about property, we're solving a deeply human trust problem: how do you feel comfortable sharing your home with a stranger? Our answer: by showing you how you can trust someone through mutual friends and similarity while being an invite-only community so everyone's a friend of a friend. We have 2 years of runway in the bank, raised £4m to date and have successfully built this over the last 7 years in 4 countries. We've launched in New Zealand, Sydney and New York matching over 8000 people and earning hosts £2.6m. We are now building London from zero. Within 18 months our goal is to help our hosts earn £8M of rent from matching 20,000 people. In the longer term future we will build the world's first AI-centric global subletting marketplace that acts like your mutual friend (explained in the hiring manifesto). By doing this it will unchain the world from their rent which will impact 1 billion people. Yes 1/8th of the world's population. That's how big this problem is. The role You'll be the third member of our founding team and responsible for the entire tech stack and have a lot of ownership over the product. You will sit alongside myself (CEO) and Tems (first generalist hire, running the marketplace). You'll be building in person, in our Shoreditch coworking space 5-6 days a week. We work 12 hours a day Mon Fri normally but happy to customise the hours if you're a night owl. Open to remote work on weekends. Tems and I work 6.5 days a week and you'll be expected to work 6 days a week and get one day off per week, likely Sunday. We would love you to get 8 hours of sleep a night (we love sleep and think it's stupid not to) We prioritise looking after yourself and not burning out (it's a marathon not a sprint) Product Our current stack is Typescript, React, Vite, Next.js, Nest.js, Postgres, AWS, Vercel, and Terraform, with the product already built from NYC for London (we are open to changing this when you join). Each new market starts fully manual via Instagram before we flip on feature flags, and in your first months you'll refine the marketplace with features like an interactive map, better search and listing flows, a guest book, connection graphs, and instant matching. From there we'll move toward a native iOS app and an AI-driven marketplace that acts like your mutual friend, powered by over 8,000 real Instagram conversations we've had with users over the last two years - data no one else has. Unlike Airbnb, which optimizes transactions, Kiki is built to optimize trust and relationships, with AI reading between the lines to surface hidden overlaps and show two people how they know each other - and therefore why they can trust each other. Who you are We're looking for our first founding engineer in London - a full-stack engineer who loves coding and building, has no ego, learns fast, and can be a scrappy builder. This is not a fit for you if you want to be a people manager or lead a tech team. We just need to build and my aim is to protect your time as much as possible to focus on that. Most importantly, you want to go on a journey of a lifetime that will be anything but easy with an incredible team who will support the heck out of you but challenge you at the same time. Building a business like ours isn't easy, society will be against you (just google my name and read the articles) but you need to stay strong and keep walking through fire with us. We are searching for someone who will build that deep irrational trust with Tems and I (Toby) to do whatever it takes to achieve this mission and build an exceptional team of close friends. Skills/experience needed Software engineering degree from a reputable university (bachelor is fine) Built end to end projects before or worked in a startup building product end to end as one of the main engineers Either 1-5 years professional experience or if not 5+ years coding and building experience on your own projects while at uni or before Don't need specific AI experience but must be curious and want to learn Total compensation £160-170k (split between salary and shares) £60-70k salary Significant number of shares (negotiable depending on salary) We can sponsor your visa Free meals 2x a day at least 5x a week Free gym membership (up to £50 a month) (Tems and I go to separate gyms 4 times a week) Note: Please self select out if you don't want to fully invest into our team and mission. This needs to be a mission driven adventure. About having a shot at building a world that we want to live in and doing that with some of the most impressive friends you'll ever build alongside. That's what we're offering at Kiki and for the right people it will be the greatest thing we ever achieve in our lifetimes. If you don't know what being a founding engineer means this video from YC is great! Becoming a founding engineer at a YC startup Cheers, Toby x

black.ai is seeking a Senior Research (Machine Learning) Engineer to lead groundbreaking generative video technology projects. The role involves developing and optimizing complex models, collaborating with cross-functional teams to bring innovative AI solutions to life. Ideal candidates have extensive experience in generative AI, particularly with Diffusion Models and Transformers, and demonstrate strong engineering practices. Benefits include equity packages, inclusive parental leave, and flexible work options.

Location London, Melbourne, Sydney Employment Type Full time Location Type Hybrid Department Engineering Who are Heidi? Heidi is building an AI Care Partner that supports clinicians every step of the way, from documentation to delivery of care. We exist to double healthcare's capacity while keeping care deeply human. In 18 months, Heidi has returned more than 18 million hours to clinicians and supported over 73 million patient visits. Today, more than two million patient visits each week are powered by Heidi across 116 countries and over 110 languages. Founded by clinicians, Heidi brings together clinicians, engineers, designers, scientists, creatives, and mathematicians, working with a shared purpose: to strengthen the human connection at the heart of healthcare. Backed by nearly $100 million in total funding, Heidi is expanding across the USA, UK, Canada, and Europe, partnering with major health systems including the NHS, Beth Israel Lahey Health, MaineGeneral, and Monash Health, among others. We move quickly where it matters and stay grounded in what's proven, shaping healthcare's next era. Ready for the challenge? The Role Working closely with the Product Lead, you will be a Mid-level or Senior Fullstack Engineer who operates at the intersection of core product development and clinical application. This role requires formal medical training and real clinical experience. Your clinical background will directly inform how we design, evaluate, and ship AI features that support real-world care delivery. Experience working on clinical AI products is highly valued, as you'll be shaping systems that must perform safely in production environments. What you'll do: Build end-to-end AI features: Architect and ship fullstack solutions (from React frontends to Python backend services) that leverage our voice AI and LLMs to automate clinical workflows. Operationalize Voice AI: Implement and fine-tune audio processing pipelines, ensuring our Automatic Speech Recognition (ASR) and LLM agents perform accurately in diverse, real-world medical environments. Bridge the gap between model and product: Translate complex feedback from clinicians into technical solutions, rapidly prototyping and deploying improvements to model behavior, prompting strategies, and audio handling. Optimise for real-time interaction: Tune fullstack performance to handle real-time audio streaming and token generation, minimizing latency so clinicians have a seamless conversational experience. Partner with implementation and clinical teams: Shorten the feedback loop by shipping critical integrations and feature requests from concept to production in days, not quarters. What we will look for: Mastery of Fullstack fundamentals: You are equally proficient in Python and modern frontend frameworks (React/TypeScript), capable of owning a feature from the database schema to the UI interaction. Applied AI & Voice fluency: You have a working knowledge of LLM integration (RAG, prompt engineering) and audio technologies (ASR, speech processing) and know how to build around their probabilistic nature. Pragmatic problem solving: You balance engineering purity with the need for speed; you know when to build a robust system and when to ship a tactical solution to unblock a customer. Cloud fluency (AWS or GCP): You can spin up your own infrastructure (containers, serverless functions) and manage CI/CD pipelines to get your code into the hands of users independently. Rigorous testing in production: You understand that "works on my machine" isn't enough; you implement observability and feedback loops to monitor how your AI features perform in the wild. Medical degree with clinical experience, and ideally experience working on clinical AI products What do we believe in? Heidi builds for the future of healthcare, not just the next quarter, and our goals are ambitious because the world's health demands it. We believe in progress built through precision, pace, and ownership. Live Forever - Every release moves care forward: measured, safe, and built to last. Data guides us, but patients define the truth that matters. Practice Ownership - Decisions follow logic and proof, not hierarchy. Exceptional care demands exceptional standards in our work, our thinking, and our character. Small Cuts Heal Faster - Stability earns trust, speed delivers impact. Progress is about learning fast without breaking what people depend on. Make others better - Feedback is direct, kindness is constant, and excellence lifts everyone. Our success is measured by collective growth, not individual output. Our mission is clear: expand the world's capacity to care, and do it without losing the humanity that makes care worth delivering. Why you should Join Heidi Real product momentum. We're not trying to generate interest, we're channeling it. This is a rare chance to create a global impact as you immerse yourself in Australia's fastest growing start-up. Equity from day one. When Heidi wins, you win. You'll share directly in the success you help create. Unmatched impact. Play a pivotal role at a critical growth moment - all while working on a product that delivers tangible value to clinicians and patients every day. Work alongside world-class talent. Join a team of operators and builders who've scaled unicorns. Global reach. Help shape our international expansion as we bring Heidi to key international markets. Growth and balance. Enjoy a personal development budget, dedicated wellness days, subsidised gym membership, and your birthday off to recharge. Flexibility that works. A hybrid environment, with 3 days in the office. Heidi's commitment to Diversity, Equity and Inclusion Heidi is dedicated to creating an equitable, inclusive, and supportive work environment that brings people together from diverse backgrounds, experiences, and perspectives. Our strength is in our differences. We're proud to be an equal opportunity employer and are proud to welcome all applicants as we're committed to promoting a culture of opportunity for all. Help us reimagine primary care and change the face of healthcare in Australia and then around the world.

Location London, Melbourne Employment Type Full time Department Engineering Who We Are Healthcare needs a better rhythm: one that keeps care continuous and deeply human. Heidi is building an AI Care Partner that works alongside clinicians to make that possible. We're a team of doctors, engineers, designers, researchers, and creatives building tools that help clinicians stay focused on what matters most: their patients. In just 18 months, Heidi has given back more than 18 million hours to healthcare professionals - supporting 73 million patient visits in 116 countries. Today, more than two million patient visits each week are powered by Heidi worldwide. Backed by nearly $100 million in funding, we're growing in the US, UK, Canada, and Europe, partnering with leading health systems including the NHS, Beth Israel Lahey Health, and Monash Health. The Role This role sits in the core Platform/SRE team that owns production. You'll work directly on incident response, on-call, system reliability, and day-to-day operations for Heidi's platform. We're open to candidates who are strong mid-level SREs ready to take on more ownership, as well as senior SREs who enjoy being hands-on in operations. The role is intentionally ops-heavy and focused on keeping real systems healthy in production. What you'll do Participate in on-call and incident response: Respond to production incidents, contribute to service restoration, and support clear communication during incidents. Over time, take increasing responsibility for leading incidents end-to-end. Improve operational reliability: Identify recurring issues and reliability risks, and drive fixes through better alerting, automation, system changes, or process improvements. Own parts of the production environment: Operate and improve Kubernetes clusters, cloud infrastructure, and core platform services, with growing ownership as familiarity increases. Strengthen observability: Improve dashboards, alerts, logs, and traces so issues are detected earlier and diagnosed faster, with a strong focus on actionable signals. Reduce operational toil: Automate repetitive tasks, simplify runbooks, and improve tooling to make on-call and day-to-day operations easier and safer. Support safe change: Improve deployments, rollback mechanisms, and operational readiness to reduce the risk of incidents caused by change. Contribute to operational practices: Write and maintain runbooks, participate in blameless post-mortems, and help improve incident response processes over time. Collaborate closely with engineers: Work with product and feature teams to improve production readiness, service ownership, and reliability expectations. What we're looking for 3-6+ years in SRE, DevOps, Platform, or operations-heavy engineering roles. Experience supporting production systems and participating in on-call rotations. Comfortable debugging live systems under pressure. Experience operating cloud infrastructure (AWS preferred). Working knowledge of Kubernetes and containerised workloads. Infrastructure as Code experience (Terraform or similar). Familiarity with monitoring and alerting tools (Datadog, Prometheus, etc). Scripting or automation experience (Python, Bash, or similar). Nice to have: Experience leading incidents or mentoring others during on-call. Experience in regulated or security-sensitive environments. Familiarity with databases, queues, and caches in production. Interest in reliability practices such as SLOs, error budgets, and capacity planning. How We Work We own production: The Platform/SRE team is responsible for reliability and incident response. Incidents are blameless: We focus on learning and improving systems, not assigning fault. Practical over perfect: We prioritise improvements that reduce real operational pain. Calm under pressure: Clear thinking and communication matter during incidents. What do we believe in? Heidi builds for the future of healthcare, not just the next quarter, and our goals are ambitious because the world's health demands it. We believe in progress built through precision, pace, and ownership. Live Forever - Every release moves care forward: measured, safe, and built to last. Data guides us, but patients define the truth that matters. Practice Ownership - Decisions follow logic and proof, not hierarchy. Exceptional care demands exceptional standards in our work, our thinking, and our character. Small Cuts Heal Faster - Stability earns trust, speed delivers impact. Progress is about learning fast without breaking what people depend on. Make others better - Feedback is direct, kindness is constant, and excellence lifts everyone. Our success is measured by collective growth, not individual output. Our mission is clear: expand the world's capacity to care, and do it without losing the humanity that makes care worth delivering. Why you should join Heidi Real product momentum. We're not trying to generate interest, we're channeling it. Equity from day one. When Heidi wins, you win. You'll share directly in the success you help create. Unmatched impact. Play a pivotal role in defining and scaling customer success at a critical growth moment - all while working on a product that delivers tangible value to clinicians and patients every day. Work alongside world-class talent. Join a team of operators and builders who've scaled unicorns. Global reach. Help shape our international expansion as we bring Heidi to key international markets. Growth and balance. Enjoy a personal development budget, work from anywhere for a month, dedicated wellness days, and your birthday off to recharge. Flexibility that works. A hybrid environment, with 3 days in the office. Heidi's commitment to Diversity, Equity and Inclusion Heidi is dedicated to creating an equitable, inclusive, and supportive work environment that brings people together from diverse backgrounds, experiences, and perspectives. Our strength is in our differences. We're proud to be an equal opportunity employer and are proud to welcome all applicants as we're committed to promoting a culture of opportunity for all.

black.ai is seeking a Mid-level or Senior Fullstack Engineer to work at the intersection of product development and clinical application, with significant responsibilities in AI feature development and operationalizing voice technologies. This role requires a medical degree and real clinical experience to ensure the AI tools cater effectively to healthcare delivery. Join a mission-driven company where you will shape next-gen healthcare solutions while enjoying a hybrid work model and various employee benefits, including personal development budgets and wellness days.

black.ai in London is seeking a Senior Software Engineer to develop backend features for innovative AI healthcare products. The role involves building high-performance systems and managing cloud infrastructures. The ideal candidate will have over 5 years in backend development, experience with MongoDB and Redis, and the ability to create scalable message queue systems. Join us in transforming healthcare globally while enjoying a hybrid work environment and personal development initiatives.

Location London Employment Type Full time Location Type Hybrid Department Engineering Who are we Heidi is building an AI Care Partner that supports clinicians every step of the way, from documentation to delivery of care. We exist to double healthcare's capacity while keeping care deeply human. In 18 months, Heidi has returned more than 18 million hours to clinicians and supported over 73 million patient visits. Today, more than two million patient visits each week are powered by Heidi across 116 countries and over 110 languages. Founded by clinicians, Heidi brings together clinicians, engineers, designers, scientists, creatives, and mathematicians, working with a shared purpose: to strengthen the human connection at the heart of healthcare. Backed by nearly $100 million in total funding, Heidi is expanding across the USA, UK, Canada, and Europe, partnering with major health systems including the NHS, Beth Israel Lahey Health, MaineGeneral, and Monash Health, among others. We move quickly where it matters and stay grounded in what's proven, shaping healthcare's next era. Ready for the challenge? The Role A Senior Software Engineer responsible for the execution of the backend features, with a deep technical understanding and how it translates to representing user needs. You will have operated in a hyper growth startup with experience building SaaS products. You will also have a deep understanding of the key challenges engineers face and a firm grasp on design principles in prioritizing key features and capabilities. Your superpower is how to bridge the gap between technical specifics and business needs effortlessly and turn high-level designs into real-world solutions. You thrive in challenging situations, and you appreciate the dynamics of a flexible, flat-structured work environment. You are quick to grasp the nuances and complexities of developing an AI product healthcare internationally. We know that brilliant people can come from unlikely places; if you have a proven track record of shipping spectacular technically challenging products and features, regardless of industry, we want to meet you. What you'll do: Ultimately you will have the opportunity to work with the engineering mastermind behind Heidi developing AI products which will change the face of healthcare Autonomously deliver beautiful & robust code with considerations on code structure design and scalability. Implement and optimize data storage solutions. Design, build, and maintain high-performance backend systems using Python. Architect and manage cloud infrastructure, ensuring scalability and reliability. Develop and manage message queue systems for real-time data processing. Collaborate with frontend and AI teams to integrate new features and enhance existing APIs. Optimize API performance and handle API versioning, documentation, and testing. What we'll look for: Strong sense of ownership & strong problem-solving skills. 5+ years of backend development experience. Solid experience with MongoDB and Redis for data management. Experience building & managing message queue systems at scale. Writing testable, effective and communicative code Data modeling, design patterns, understanding trade-offs Deep understanding of API design principles, including security, versioning, and performance. Data & application security knowledge and skills Experience in integrating with third-party systems Competent with source code control and CI/CD pipeline technologies. Architecting and building highly available, scalable, secure & performant systems What do we believe in? Heidi builds for the future of healthcare, not just the next quarter, and our goals are ambitious because the world's health demands it. We believe in progress built through precision, pace, and ownership. Live Forever - Every release moves care forward: measured, safe, and built to last. Data guides us, but patients define the truth that matters. Practice Ownership - Decisions follow logic and proof, not hierarchy. Exceptional care demands exceptional standards in our work, our thinking, and our character. Small Cuts Heal Faster - Stability earns trust, speed delivers impact. Progress is about learning fast without breaking what people depend on. Make others better - Feedback is direct, kindness is constant, and excellence lifts everyone. Our success is measured by collective growth, not individual output. Our mission is clear: expand the world's capacity to care, and do it without losing the humanity that makes care worth delivering. Why you should Join Heidi Real product momentum. We're not trying to generate interest, we're channeling it. This is a rare chance to create a global impact as you immerse yourself in Australia's fastest growing start-up. Equity from day one. When Heidi wins, you win. You'll share directly in the success you help create. Unmatched impact. Play a pivotal role at a critical growth moment - all while working on a product that delivers tangible value to clinicians and patients every day. Work alongside world-class talent. Join a team of operators and builders who've scaled unicorns. Global reach. Help shape our international expansion as we bring Heidi to key international markets. Growth and balance. Enjoy a personal development budget, dedicated wellness days, subsidised gym membership, and your birthday off to recharge. Flexibility that works. A hybrid environment, with 3 days in the office. Heidi's commitment to Diversity, Equity and Inclusion Heidi is dedicated to creating an equitable, inclusive, and supportive work environment that brings people together from diverse backgrounds, experiences, and perspectives. Our strength is in our differences. We're proud to be an equal opportunity employer and are proud to welcome all applicants as we're committed to promoting a culture of opportunity for all. Help us reimagine primary care and change the face of healthcare in Australia and then around the world.

Location London Employment Type Full time Department Engineering Who are Heidi? Heidi is building an AI Care Partner that supports clinicians every step of the way, from documentation to delivery of care. We exist to double healthcare's capacity while keeping care deeply human. In 18 months, Heidi has returned more than 18 million hours to clinicians and supported over 73 million patient visits. Today, more than two million patient visits each week are powered by Heidi across 116 countries and over 110 languages. Founded by clinicians, Heidi brings together clinicians, engineers, designers, scientists, creatives, and mathematicians, working with a shared purpose: to strengthen the human connection at the heart of healthcare. Backed by nearly $100 million in total funding, Heidi is expanding across the USA, UK, Canada, and Europe, partnering with major health systems including the NHS, Beth Israel Lahey Health, MaineGeneral, and Monash Health, among others. We move quickly where it matters and stay grounded in what's proven, shaping healthcare's next era. Ready for the challenge? The Role As a Solution Engineer, you'll serve as the technical lead during the sales process - helping prospects understand what's possible with Heidi, guiding integration feasibility, and ensuring a smooth transition into implementation. You'll work closely with Account Executives, Product, and Engineering to navigate high-stakes enterprise requirements, including EMR integrations, SSO, custom data workflows, telephony and call system integrations (e.g., Twilio, WebRTC, SIP), and security architecture. You'll bring technical credibility, customer empathy, and a strong sense of ownership to every deal. What you'll do: Technical Discovery & Qualification: Lead deep technical discovery with enterprise and mid-market prospects to uncover integration, security, and compliance needs. Solution Design: Collaborate with product and engineering to design tailored solutions that meet customer requirements while aligning with Heidi's platform roadmap. Product Demos & Technical Presentations: Deliver compelling demos and architecture walkthroughs to technical stakeholders including IT, InfoSec, and engineering teams. RFP & Security Review Support: Own technical responses for RFPs, security assessments, and due diligence requests with attention to detail and accuracy. Deal Acceleration & Objection Handling: Proactively surface and resolve technical concerns that slow down the sales process, acting as a trusted technical advisor to the customer. Post-Sales Handoff & Feedback Loop: Partner with implementation teams to ensure a smooth transition post-signature and provide feedback to product and engineering from the field. What we'll look for: 5+ years of experience in Solution Engineering, preferably in SaaS, healthcare, or enterprise software. Excellent communication skills. Strong working knowledge of integration protocols (REST APIs, SAML/OIDC, SCIM), enterprise architecture, and security standards. Experience supporting sales cycles with large healthcare providers, health systems, or EMR vendors is highly valued (FHIR/HL7 familiarity a plus). Ability to synthesize complexity and communicate clearly to both technical and non-technical audiences. Comfortable operating autonomously in a fast-paced, early-stage environment. A trusted partner to sales and a credible voice in the room with technical leaders on the customer side. Bonus: Background in healthtech, startups, or regulated environments, plus hands on experience with telephony or voice integration systems (Twilio, WebRTC, SIP). What do we believe in? We create unconventional solutions to difficult problems and we build them fast. We want you to set impossible goals and make them happen, think landing a rocket but the medical version. You'll be surrounded by a world class team of engineers, medicos and designers to do your best work, inspired by our shared beliefs: We will stop at nothing to improve patient care across the world. We design user experiences for joy and ship them fast. We make decisions in a flat hierarchy that prioritizes the truth over rank. We provide the resources for people to succeed and give them the freedom to do it. Why you'll flourish working with us? Flexible work with a hybrid environment. Additional paid day off for your birthday and wellness days. Discounted corporate gym memberships. A generous personal development budget of $500 per annum. Learn from some of the best engineers and creatives, joining a diverse team. Become an owner, with shares (equity) in the company, if Heidi wins, we all win. The rare chance to create a global impact as you immerse yourself in one of Australia's leading healthtech startups. If you have an impact quickly, the opportunity to fast track your startup career! Help us reimagine primary care and change the face of healthcare around the world.

black.ai is seeking a Solution Engineer in London to lead technical sales processes, focusing on integration and implementation. You will collaborate with Account Executives and engineers, ensuring seamless transitions for clients. The ideal candidate has at least 5 years in Solution Engineering with a background in healthcare or enterprise software. We offer a hybrid work environment and a team dedicated to changing healthcare through innovative AI solutions.

Job Summary We are seeking a Senior Photonics Engineer to develop ultra-low-loss optical interface solutions between dissimilar, exploratory, waveguiding platforms. This role combines device concept development, optical simulation, and hands on experimental validation to assess and mature new approaches for mode conversion and coupling. The successful candidate will combine creativity in photonic device design with strong engineering judgement, identifying solutions that are both high performing and practical to deploy. Working closely with internal teams and expert external partners, they will help guide the development of advanced optical interfaces. We welcome applicants from both advanced industrial photonics environments and leading research groups who combine strong physical intuition with practical experimental and engineering judgement. Responsibilities Develop and assess novel device concepts for ultra low loss optical coupling and mode conversion between dissimilar optical platforms. Use simulation and analytical tools to study optical propagation, modal behaviour, overlap, loss mechanisms, and sensitivity to design and fabrication tolerances. Apply tools such as BeamPROP, FDTD, or equivalent methods to evaluate candidate device concepts and guide design decisions. Design and execute experiments to validate device performance, coupling efficiency, mode conversion behaviour, and optical loss. Correlate modelling and experimental results to refine concepts, test assumptions, and build confidence in technical feasibility. Evaluate candidate solutions with consideration for robustness, manufacturability, packaging, and practical implementation constraints. Work closely with expert external partners to review technical options, assess results, and help mature promising device approaches. Collaborate across photonics, systems, and experimental teams to develop practical optical interface solutions for demanding applications. Experience/Qualifications Required PhD degree in photonics, optics, physics, engineering, or a related discipline, or equivalent practical experience. Significant experience in photonic device development, guided wave optics, optical coupling, or integrated optical interface design. Strong understanding of mode conversion, mode control, and optical coupling between dissimilar waveguiding or photonic platforms. Experience with simulation tools such as BeamPROP, FDTD, eigenmode, BPM, or related methods for analysing propagation, modal behaviour, and coupling performance. Proven ability to use simulation to guide device design choices and interpret behaviour in complex optical interfaces. Hands on experience designing and executing experiments to characterize optical coupling, insertion loss, and device performance. Strong experimental judgement and ability to troubleshoot complex photonic or optical measurements. Ability to assess technical feasibility while keeping practical implementation constraints in view. Strong communication skills and ability to work effectively with internal teams and external technical partners. Preferred Experience developing low loss optical interface devices between fibre, waveguide, or integrated photonic platforms. Experience with advanced optical packaging, taper based transitions, or coupling structures. Experience with optimisation methods or inverse design for photonic structures. Experience taking photonic device concepts from early stage exploration through experimental proof of concept. Experience balancing innovation, performance, and manufacturability in photonic device development. Experience in advanced industrial photonics environments or high performing applied research groups. PsiQuantum provides equal employment opportunity for all applicants and employees. PsiQuantum does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, or any other basis protected by applicable laws. Note: PsiQuantum will only reach out to you using an official PsiQuantum email address and will never ask you for bank account information as part of the interview process. Please report any suspicious activity to . We are not accepting unsolicited resumes from employment agencies. The ranges below reflect the target ranges for a new hire base salary. Actual compensation may vary outside of these ranges and is dependent on various factors including but not limited to a candidate's qualifications including relevant education and training, competencies, experience, geographic location, and business needs. Base pay is only one part of the total compensation package. Full time roles are eligible for equity and benefits. Base pay is subject to change and may be modified in the future. Daresbury, United Kingdom £64,000 - £76,500 GBP

black.ai is looking for a Senior Photonics Engineer in the UK. This role involves developing ultra-low-loss optical solutions, conducting optical simulations, and validating concepts through hands-on experiments. The ideal candidate will have a PhD in a related field, expertise in photonic device design, and strong communication skills. The position offers a salary between £64,000 and £76,500, alongside equity and benefits opportunities. Join us to innovate in advanced optical interfaces for impactful applications.

About Eucalyptus We're on a mission to make good health last a lifetime. More than 1 billion people live with obesity worldwide, driving preventable chronic conditions. We're here to build better long-term care. Eucalyptus is now part of Hims & Hers, the global leader in personalised health and wellness. Euc is the company behind Juniper, one of the world's largest weight management programs combining GLP 1 medication with personalised nutrition, movement support, and clinician led care from prescribers, nurses, health coaches, pharmacists, and dietitians. Our published clinical research shows that our combined clinical and behavioural approach helps patients lose significantly more weight during their treatment with Juniper by four times. Our Growth Story: 130% YoY revenue growth and a 90% reduction in cash burn - culminating in our $1.15bn acquisition by Hims & Hers in 2026, giving us the platform to take long term care global Supported over 350k patients living with obesity across our 5 markets Received selective NICE endorsement to provide services to the NHS Tailored our offering to thousands of patients in Australia, the UK, Germany, Japan and Canada. About the role We're looking for a Senior Commercial Strategy Analyst to join our Commercial FP&A team. This isn't a traditional "back office" finance role. You will sit at the intersection of commercial strategy and technical data execution. You'll be responsible for translating complex unit economics into growth levers, leveraging modern tooling and AI to automate the mundane and focus on the "why." What You'll Do Commercial Performance Engine: Partner with brand leads to interrogate daily performance. You won't just report on CAC; you'll analyze the marginal return on spend across multi channel funnels. Advanced Financial Architecture: Maintain and scale complex, driver based financial models. You'll be expected to bridge the gap between high level P&L targets and granular operational data. AI Driven Efficiency: Integrate AI and automation (e.g. LLM assisted data cleaning, Python scripts, or advanced ChatGPT workflows) to accelerate reporting cycles and predictive forecasting. Unit Economics Deep Dives: Deconstruct LTV/CAC ratios, payback periods, and cohort retention profiles to advise on capital allocation across different geographies. Data Synthesis: Work closely with the Data team to ensure our "Source of Truth" is robust, moving beyond static sheets into dynamic, real time dashboards. Scenario & Sensitivity Analysis: Build "stress test" models to evaluate the impact of supply chain shifts, pricing elasticity, and new market entry variables. Operational Partnering: Act as a financial co pilot for the Marketing and Operations teams, translating their roadmaps into headcount plans and Opex budgets. What You'll Bring 3 6 years of experience in a high intensity analytical environment. Backgrounds in Investment Banking, high growth companies or similar are highly valued. Strong FP&A and commercial finance foundation with experience supporting business performance through financial modeling, forecasting, and strategic analysis. Experience within D2C, B2C, consumer, subscription, or high growth commercial environments is strongly preferred. Strong understanding of commercial and customer metrics including: CAC (Customer Acquisition Cost) LTV (Lifetime Value) Retention and cohort analysis Revenue performance and unit economics The "Full Stack" Analyst: You possess a rare combination of commercial intuition and technical rigor. You can discuss brand strategy with a GM and SQL joins with a Data Engineer in the same hour. Technical Mastery: Expert level Excel/Google Sheets is a baseline. Proficiency (or a strong desire to learn) SQL, Python, or data visualization tools (Looker/Tableau) is essential. AI Native: You are proactive in using AI tools to enhance your productivity, from automating spreadsheet workflows to synthesizing large data sets. Precision & Speed: You have the "IB style" attention to detail where every decimal point matters, but the startup speed to ship an 80/20 analysis when the business needs to move fast. Strong Communication: The ability to turn a sea of data into a 3 bullet point executive summary that drives action. Why join Eucalyptus? Euc is also behind a growing family of digital healthcare clinics (Pilot, Kin, Software) across men's health and well being, fertility, and skincare. Here's what makes joining Euc unique: What's next - Our goal for the next three years is to support 1 million patients globally to live better for longer. We're launching into new conditions, demographics, and geographies as we build a truly preventive healthcare ecosystem. Build something world changing - We're on the path to becoming the world's largest international digital healthcare company. It will be challenging, fast paced, and deeply rewarding. Make real impact - You will deliver work that directly shapes patient outcomes and scales evidence based care across markets. Accelerate your growth - You will have high ownership, continuous feedback, and dedicated development support. Join a motivated team - You will collaborate with talented peers to solve complex clinical and operational problems at scale. What's ahead in the UK Invest in your growth - Annual development budget plus 3 days of professional development leave Work flexibly - Hybrid setup with 3 days a week in our Old Street office, designed for focus and collaboration Support your well being - Private health insurance through Vitality or opt for a monthly wellness allowance to spend on what matters most to you Take time off - 25 days of holiday, enhanced parental leave and work from anywhere 3 weeks out of the year Join a connected team - A vibrant office culture with regular socials, clubs, after school sport, and seasonal events At Eucalyptus, we value individuals from all backgrounds, experiences, and perspectives, and we embrace the unique qualities each person brings. When you apply, please let us know of any reasonable adjustments you may need during the interview process. We use AI assisted tools across our business to help our teams work more efficiently, including within our recruitment process. These tools support our team - all hiring decisions are made by real people, and every application is reviewed by a member of our recruitment team.

black.ai is seeking a dynamic professional to join its international expansion team in Greater London. In this role, you will own market evaluation, manage launches from inception to first patient, and oversee ongoing market operations. The ideal candidate will have 6+ years of experience in fast-paced environments like consulting or startups, strong skills in commercial modelling, and the ability to negotiate with partners. The position offers opportunities for career growth, competitive benefits, and a substantial impact on patient outcomes.