Light

Retire the ERP. Light exists to replace factory-era ERPs with software that feels alive. Our Smart Financial Platform gives modern, global companies superpowers-automated accounting, real-time reporting, and financial flows that move at the speed of the business. We build with our customers, ship fast, and obsess over craft. In a short time, Light has gone from idea to the operating core for leading companies like Lovable, Legora, and Keyshot. People don't just use Light-they enjoy it. We're an early team defining a new software category. Think engineers who love debits and credits, designers who care about reconciliation states, and operators who treat finance as a product. If you're excited to modernize how the world runs money-one workflow at a time-you're in the right place. Backed by world-class investors and advised by industry titans, we're building category-defining products with the freedom to ship ambitiously and own outcomes. Come help us make Light the global default for next-gen finance. This Backend Engineer role Building our core Smart Financial Platform further that helps multinational companies manage all of their accounting with AI and a great UX. Keeping focus on customer needs while implementing robust and scalable technical solutions. Developing and optimizing backend services, APIs, and infrastructure to support our high-performance frontend applications. Your qualifications: 4+ years of experience building robust backend systems with solid understanding of server-side architecture and API design. Strong command of backend programming languages, with the ability to write clean, efficient code. Proficiency in Kotlin / Java, JVM, PostgreSQL, AWS Experience designing and implementing RESTful APIs and DB schemas that scale. Deeply care about quality - you actively participate in code reviews, write comprehensive unit and integration tests, and thoroughly QA your work. Great communicator who collaborates effectively with frontend engineers on API design and cross-functional teams on system architecture. You can commit and ship production-ready code that is secure, scalable, performant, and maintains well. Practical experience using AI or emerging technology tools to improve productivity, insight, or decision-making, with the ability to apply first-principles thinking to new problems. Bonus points: Experience with accounting or companies' finance flows (accounts payable, invoicing, payments etc). Building AI-naitive robust and scalable applications. You've been thriving in high-growth startups. Our Tech Stack: Hosted on AWS Postgres DB Kotlin Monolith React Frontend The good stuff In addition to being part of a great team and working in a really fun and innovative environment, we offer: A competitive salary + potential stock options 25 days of annual leave + public holidays in the country where you are based. Regular socials and company off-sites A huge opportunity for career growth as you'll help shape a market-defining product. The famous last words Working at Light means you're embarking on an exciting journey to reshape the future of multinational financial operations. Our cheat-code is that we've built something like this before - and are now doing it again, only better. Our goal is to make global finance effortless and empower companies to make informed decisions. Join the rocket ship while it's taking off

About Light. Light exists to replace factory-era ERPs with software that feels alive. Our Smart Financial Platform gives modern, global companies superpowers-automated accounting, real-time reporting, and financial flows that move at the speed of the business. We build with our customers, ship fast, and obsess over craft. In a short time, Light has gone from idea to the operating core for leading companies like Lovable, Legora, and Keyshot. People don't just use Light-they enjoy it. We're an early team defining a new software category. Think engineers who love debits and credits, designers who care about reconciliation states, and operators who treat finance as a product. If you're excited to modernize how the world runs money-one workflow at a time-you're in the right place. Backed by world-class investors and advised by industry titans, we're building category-defining products with the freedom to ship ambitiously and own outcomes. Come help us make Light the global default for next-gen finance. The AI Platform Engineer Role You will join the Foundation Team, the force multiplier for our entire engineering organization. Our mandate is to "build the factory that builds the product." As a Senior AI Platform Engineer, you will not just be tuning prompts, you will be architecting the internal "AI Engine" that powers every AI feature at Light. We are looking for a systems thinker who is obsessed with the bleeding edge of AI but grounded in the reality of production engineering. You will help us move beyond simple API wrappers to build a robust Agent Runtime, define our internal standards for AI reliability, and ensure our product teams can ship deterministic, high-quality AI features in days rather than weeks. What you will do Architect the Engine: Design and build a production-grade Agent Runtime that handles tool registration, permissions, timeouts, and retry semantics for autonomous agents. Define the Standard: Evolve our internal GenAI Client and SDKs to create a "paved road" for product engineers, standardizing how every team at Light interacts with LLMs. Solve for Trust: Build the "CI/CD for AI", implementing reliability frameworks, golden datasets, and regression testing pipelines that allow us to deploy prompts and agents with confidence. Expand the Ecosystem: Lead the integration of Light with external platforms via the Model Context Protocol (MCP) and automation tools like n8n. Governance & Scale: Design the guardrails, rate limits, and caching strategies that ensure our AI infrastructure scales predictably and cost-effectively. What you will need Strong Systems Engineering Background: You have significant experience building scalable backend systems or internal developer platforms. You care deeply about latency, observability, and clean APIs. AI Native Mindset: You live on the bleeding edge of the AI landscape. You understand the difference between an Agent and a Chain, you have experimented with MCP, and you keep up with the latest releases from OpenAI, Anthropic, and DeepSeek. Polyglot Capabilities: You are proficient in Kotlin (our core backend language) or have a strong willingness to learn it. Focus on Determinism: You hate flaky software. You understand that trust is the biggest bottleneck to AI adoption, and you know how to build the evaluations and logging necessary to generate that trust. Force Multiplier Attitude: You get more satisfaction from unblocking 10 other engineers with a great tool than from shipping a single feature yourself. The good stuff Competitive salary + potential stock options 25 days of annual leave + public holidays (in your country) Regular socials and company off sites. A huge opportunity to shape a market defining product and engineering culture The famous last words At Light, we're building the most trusted financial platform in the world - and trust starts with security. As our Security Lead, you'll help us earn that trust every day. Join the rocket ship while it's taking off

A modern tech company in Greater London is seeking a Senior AI Platform Engineer to architect the internal AI Engine. Responsibilities include designing a robust Agent Runtime, implementing reliability frameworks, and evolving internal tools for product engineers. The ideal candidate will have a strong systems engineering background and a passion for AI. Competitive salary and stock options are part of the offer, along with 25 days of annual leave and an opportunity to greatly impact the product and culture.

A leading financial software company in the UK is seeking a CRM/HRM Integration Engineer to enhance connections with major platforms like Salesforce and BambooHR. The role involves building integrations, troubleshooting issues, and ensuring reliable performance of APIs. Ideal candidates will have strong backend engineering skills in Kotlin or Java, along with experience in API integrations. You'll be pivotal in improving customer onboarding and the overall integration quality.

Retire the ERP. Light exists to replace factory-era ERPs with software that feels alive. Our Smart Financial Platform gives modern, global companies superpowers-automated accounting, real-time reporting, and financial flows that move at the speed of the business. We build with our customers, ship fast, and obsess over craft. In a short time, Light has gone from idea to the operating core for leading companies like Lovable, Legora, and Keyshot. People don't just use Light-they enjoy it. We're an early team defining a new software category. Think engineers who love debits and credits, designers who care about reconciliation states, and operators who treat finance as a product. If you're excited to modernize how the world runs money-one workflow at a time-you're in the right place. Backed by world-class investors and advised by industry titans, we're building category-defining products with the freedom to ship ambitiously and own outcomes. Come help us make Light the global default for next-gen finance. Light's customers need their financial platform connected to their CRM (HubSpot, Salesforce, Pipedrive) and HRM systems (BambooHR, Personio, Deel, etc.). This role owns all CRM/HRM integration work-building connectors, maintaining existing ones, and being the go-to person when customers need their people/sales data flowing into Light. You'll work closely with Customer Delivery on implementations and the Solutions Architecture group on connector design patterns. This isn't a support role-you're an engineer building and improving how Light connects to these systems. What You'll Do Build and maintain integrations with major CRM platforms (Salesforce, HubSpot, Pipedrive) and HRM systems (BambooHR, Personio, Deel, Workday) Own the integration patterns and shared libraries for CRM/HRM connectors Work directly with customers during onboarding to configure and troubleshoot their integrations Document APIs and integration approaches so the team can scale knowledge Triage and resolve integration-related production issues Partner with Product to prioritise which connectors to build next based on customer demand Your Qualifications Strong backend engineering (Kotlin preferred, Java/JVM acceptable) Experience building and maintaining third-party API integrations Comfortable with OAuth flows, webhooks, rate limiting, and the messiness of real-world APIs PostgreSQL knowledge Familiarity with at least one major CRM or HRM platform's API Pragmatic approach - these integrations need to work reliably, not win architecture awards Practical experience using AI or emerging technology tools to improve productivity, insight, or decision-making, with the ability to apply first-principles thinking to new problems. Nice to Have Experience with financial data or ERP integrations Previous work in a B2B SaaS environment Exposure to AWS (EKS, Lambda, RDS) Why This Role Exists CRM/HRM integrations are a growing part of our customer onboarding and ongoing support load. Having a dedicated specialist means faster implementations, better connector quality, and a single point of accountability. You'll have real ownership and direct customer impact. The good stuff In addition to being part of a great team and working in a really fun and innovative environment, we offer: A competitive salary + potential stock options 25 days of annual leave + public holidays in the country where you are based. Regular socials and company off-sites A huge opportunity for career growth as you'll help shape a market-defining product. The famous last words Working at Light means you're embarking on an exciting journey to reshape the future of multinational financial operations. Our cheat-code is that we've built something like this before - and are now doing it again, only better. Our goal is to make global finance effortless and empower companies to make informed decisions. Join the rocket ship while it's taking off

A dynamic software company in Greater London is seeking a Backend Engineer to further enhance their Smart Financial Platform. You'll focus on building robust systems with a solid understanding of server-side architecture and API design. The ideal candidate has over 4 years of experience with backend programming languages, especially Kotlin/Java and PostgreSQL, and is passionate about quality code. This position offers a competitive salary, stock options, and significant growth opportunities in a thriving startup environment.

A fintech company in Greater London is looking for a Senior DevSecOps Engineer to enhance security across its engineering infrastructure. You will establish necessary security controls, lead compliance efforts, and ensure security is integrated into development workflows. Ideal candidates will bring 5-7 years of security engineering experience, particularly within fast-paced tech environments. This position offers a competitive salary and opportunities for stock options and professional development.

About Light. Light exists to replace factory-era ERPs with software that feels alive. Our Smart Financial Platform gives modern, global companies superpowers-automated accounting, real-time reporting, and financial flows that move at the speed of the business. We build with our customers, ship fast, and obsess over craft. In a short time, Light has gone from idea to the operating core for leading companies like Lovable, Legora, and Keyshot. People don't just use Light-they enjoy it. We're an early team defining a new software category. Think engineers who love debits and credits, designers who care about reconciliation states, and operators who treat finance as a product. If you're excited to modernize how the world runs money-one workflow at a time-you're in the right place. Backed by world-class investors and advised by industry titans, we're building category-defining products with the freedom to ship ambitiously and own outcomes. Come help us make Light the global default for next-gen finance. The Senior DevSecOps Engineer role You'll own security across Light's engineering infrastructure and development lifecycle. You'll establish the security controls and compliance posture that enterprise fintech customers require, whilst embedding security practices that scale with our rapidly growing engineering team. This is a hands-on technical role with strategic scope. You'll split your time between infrastructure security engineering (Terraform, AWS security services, CI/CD hardening), compliance programme execution (SOC 2, GDPR, ISO 27001), and partnering with engineering teams to build security into their workflows from the start. Our environment: AWS infrastructure (EKS, RDS PostgreSQL, Lambda, ECR, S3, SES, Bedrock for AI/LCI) Kotlin backend with Gradle, Next.js frontend with TypeScript GitHub Actions CI/CD, Tanka/Jsonnet for Kubernetes, Terraform for infrastructure Datadog and CloudWatch for observability, SOPS and AWS Secrets Manager for secrets 25 engineers scaling to 50+, distributed across 15+ countries What you'll own: You'll design and implement security controls across our AWS environment, harden our EKS cluster security, and secure our CI/CD pipelines. You'll establish security controls for our AI workflows, including Bedrock integrations, prompt validation, and model access governance. You'll lead our SOC 2 Type II compliance programme, establish security policies for GDPR and ISO 27001, and implement automated compliance monitoring. Day-to-day, you'll write Terraform, review architecture designs, triage security alerts, build security into development workflows, coordinate penetration testing, and partner with engineering on threat modelling and secure development practices. You'll also respond to customer security questionnaires, document controls for auditors, establish incident response procedures, and work with our Head of Engineering on security roadmap and priorities. How you fit into the team: You combine deep technical knowledge with strategic judgment, knowing how to balance real-world risks with business speed. You're hands-on when needed, but equally capable of driving policy, compliance programmes, and long-term security maturity. You've led security in high-growth environments before - and you're ready to do it again, with impact. Your qualifications: 5-7 years' experience in security engineering roles, preferably in fintech, SaaS or payments Proven experience owning infrastructure and cloud security in a fast-moving environment Deep technical expertise: AWS (VPC, IAM, EKS, Lambda, RDS), Kubernetes, Terraform/IaC Hands-on experience with vulnerability management, penetration test oversight, secure CI/CD, container security Familiarity with compliance frameworks: SOC 2, ISO 27001, GDPR Excellent risk judgment and ability to balance security requirements with business velocity Strong communication skills - able to influence engineers and explain security to non-technical stakeholders Practical experience using AI or emerging technology tools to improve productivity, insight, or decision-making, with the ability to apply first-principles thinking to new problems. Bonus points: Prior experience in fintech / financial software / payments Certifications such as AWS Security Specialty, CISSP, CKS, OSCP, or equivalent Experience with compliance automation platforms (Vanta, Drata, Secureframe) Background in software engineering or prior development experience A few tips to stand out Show how you've balanced speed and security in a high-growth environment Demonstrate how you've influenced culture - not just control Share how you've measured and communicated risk, coverage, and progress Walk us through your past playbooks or roadmaps - and how they evolved Bonus if you can articulate the "why" behind the trade-offs you've made The good stuff In addition to being part of a great team and working in a really fun and innovative environment, we offer: Competitive salary + potential stock options 25 days of annual leave + public holidays (in your country) Regular socials and company off-sites. A huge opportunity to shape a market-defining product and engineering culture The famous last words At Light, we're building the most trusted financial platform in the world - and trust starts with security. As our Security Lead, you'll help us earn that trust every day. Join the rocket ship while it's taking off