Instil Software Ltd

A dynamic security team is seeking a highly skilled Lead Penetration Tester in Belfast. In this senior role, you will lead web application and API penetration testing for a diverse range of clients. Responsibilities include managing engagements, mentoring junior testers, and advancing testing methodologies. Essential skills include CHECK Team Lead status, extensive penetration testing experience, and strong scripting abilities. The position offers flexible working arrangements, 35 days of holiday, and a comprehensive benefits package.

We're looking for a highly skilled Lead Penetration Tester with CHECK Team Lead (Web App) to join our dynamic security team. This is a senior, hands on role where you'll lead and deliver complex web application and API penetration testing engagements, working with a diverse range of clients across software, fintech, manufacturing, engineering, legal, and public sector organisations. You'll play a pivotal role in shaping our application security testing capability, coordinating end to end engagements, mentoring junior testers, and contributing to the ongoing evolution of our tooling and methodologies. If you enjoy deep technical work, solving complex application security problems, and working closely with developers and stakeholders, we'd love to hear from you. What You'll Do Lead and execute web application and API penetration tests as a CHECK Team Leader (App). Manage end to end engagements: from scoping and kick off sessions through to delivery and client debriefs. Perform in depth manual testing of modern web applications, authentication flows, APIs, and business logic. Produce clear, detailed, and actionable reports outlining vulnerabilities and tailored remediation guidance. Stay ahead of emerging application level threats and integrate new testing techniques into our methodology. Automate repetitive tasks and improve efficiency through scripting and tooling enhancements. Mentor and coach junior testers, particularly around web application testing techniques and report quality. Enhance application focused tools and methodologies, keeping our services current and effective. Support pre sales efforts as a subject matter expert in web application security. Communicate findings effectively to both technical and non technical stakeholders. Contribute to thought leadership through blogs, white papers, or speaking engagements. Essential Skills CHECK Team Lead (CTL) status - Web Applications. Current UK SC Clearance. Minimum 5 years' penetration testing experience, with a strong focus on web applications and APIs. Proven experience leading and signing off CHECK web application engagements. Deep expertise in web application, API, and authentication testing methodologies. Solid understanding of modern application architectures (cloud hosted apps, microservices, REST APIs). Working knowledge of cloud environments (AWS, Azure, GCP) as they relate to application security. Proficiency with tools such as Burp Suite Pro, along with supporting tooling (e.g. Nmap, Kali). Strong scripting skills (Python, Shell, etc.). Excellent communication and technical report writing skills. Why Join Instil? Recognition That Matters: A discretionary annual performance bonus that rewards your impact and contribution to our success. Flexibility Built In: Flexible working arrangements and summer hours, because life isn't 9 to 5, and balance matters. Financial Security: A highly competitive pension scheme with generous employer contributions, private healthcare, and life assurance for peace of mind. Health & Wellbeing: Employee Assistance Programme, mental health support, cycle to work scheme, and regular social events to keep our culture vibrant. Time to Recharge: 35 days holiday, enhanced maternity pay, and family first policies so you can focus on what matters most. Learning Never Stops: From courses to certifications, we'll invest in your development so you can keep growing and shaping what's next. Community & Culture: Opportunities to volunteer, give back, and be part of initiatives that make Instil a truly inclusive and connected workplace.

Instil Software Ltd is seeking a Mid-Level Python Software Engineer based in Belfast. This role involves building backend services, working with cloud infrastructure (primarily GCP), and writing automation scripts. The ideal candidate has solid experience with Python and strong scripting skills, particularly in Bash, as well as experience with relational databases. Instil offers a flexible working environment, a competitive pension scheme, and a range of benefits aimed at promoting wellbeing and professional development.

The Role We're looking for a solid Mid Level Python Software Engineer who enjoys building reliable systems, working close to infrastructure, and automating how software gets delivered. This role sits at the intersection of software engineering and cloud/platform work, you'll be writing Python, working with databases, and helping shape how applications run and scale in cloud environments. It's a good fit for someone who likes ownership, is comfortable getting into the detail, and enjoys improving how things are done rather than just maintaining the status quo. What You'll Be Doing Build and maintain backend services using Python Work with cloud infrastructure (primarily GCP, but exposure to AWS/Azure is relevant) Design and manage relational databases (Postgres or similar) Own and execute database migrations safely and efficiently Write automation scripts (Bash primarily) to support development and operations workflows Contribute to CI/CD pipelines and improve release processes Troubleshoot issues across application and infrastructure layers Collaborate with engineers, data teams, and platform specialists to deliver production ready systems. Required Experience building production systems using Python Exposure to cloud environments (GCP preferred, AWS or Azure also considered) Strong scripting ability (Bash) Experience with relational databases (Postgres or similar) Hands on experience with database schema changes / migrations Solid understanding of software engineering fundamentals and system design Nice to Have Experience with GitLab CI Exposure to PowerShell / Windows scripting Understanding of application layer networking (e.g. Nginx, service discovery, routing) Experience automating CI/CD pipelines end to end Familiarity with VMWare / virtualised environments Benefits Recognition That Matters - A discretionary annual performance bonus that rewards your impact and contribution to our success. Flexibility Built In - Flexible working arrangements and summer hours, because life isn't 9 to 5, and balance matters. Financial Security - A highly competitive pension scheme with generous employer contributions, private healthcare, and life assurance for peace of mind. Health & Wellbeing - Employee Assistance Programme, mental health support, cycle to work scheme, and regular social events to keep our culture vibrant. Time to Recharge - 35 days holiday, enhanced maternity pay, and family first policies so you can focus on what matters most. Learning Never Stops - From courses to certifications, we'll invest in your development so you can keep growing and shaping what's next. Community & Culture - Opportunities to volunteer, give back, and be part of initiatives that make Instil a truly inclusive and connected workplace. Instil has been delivering world class software engineering and technology solutions for over 20 years, trusted by global brands to solve complex challenges and drive innovation. From modernising legacy systems to building cutting edge applications, we help our clients navigate an ever changing digital landscape with confidence and agility. We're proud to be an award winning employer, reflecting how our people are at the heart of everything we do: Recognised as a Great Place to Work for three consecutive years, and in 2024 ranked in the Top 20 Best Workplaces in the UK for medium sized companies. Winner of Company of the Year at the Digital DNA Awards 2022, celebrating excellence in Northern Ireland's tech sector. Driven by a love for technology and a commitment to excellence, we bring together people who want to make a difference. We'll support your journey, because your success is part of ours.

Instil Software Ltd is seeking a Data Engineer in Belfast to design, build, and improve data pipelines. You will collaborate closely with engineers and analysts within a supportive environment. Ideal candidates have 2-5 years of experience in data engineering, strong Python and SQL skills, and familiarity with AWS data services. Instil offers a competitive benefits package including flexible working, health support, and 35 days annual leave, emphasizing employee wellbeing and growth.

A leading software engineering firm in Belfast is seeking a highly skilled Principal Penetration Tester to join their dynamic security team. This senior role involves leading complex penetration testing engagements across infrastructure, cloud, web, and mobile applications. The ideal candidate has CHECK Team Lead status and at least 5 years of experience in penetration testing. The position offers a flexible working environment, competitive benefits, and opportunities for personal growth.

The Role We're looking for a Data Engineer with solid commercial experience building and supporting data platforms and pipelines. You'll work hands on across our cloud data stack, partnering with engineers and analysts to deliver reliable, well modelled data that supports analytics and downstream use cases. This role is focused on practical delivery; designing, building, and improving data pipelines, while developing depth across modern data engineering practices. Essential Skills 2-5 years' commercial experience in a data engineering or data focused software engineering role. Experience working with production data, including considerations around data quality, reliability, and failure handling. Strong problem solving skills and an ability to work effectively with incomplete or evolving requirements. Clear communication skills and experience collaborating within cross functional teams. Commercial experience including a combination of the following: Python for data processing, transformation, and pipeline development AWS data services such as S3, Lambda, Glue (or comparable cloud services) Designing, building, and maintaining ETL / ELT pipelines in production environments Strong SQL skills, including complex queries and performance tuning Working with a cloud data warehouse such as Snowflake (or similar), covering data models, pipelines, and warehouse objects Handling semi structured data (e.g. JSON, Parquet) alongside structured datasets Desirable Skills Experience with data orchestration or scheduling tools. Exposure to CI/CD practices for data pipelines. Familiarity with analytics or BI use cases and consumers of data. Awareness of data governance, access control, or security concepts. Experience working in agile, delivery focused teams. Why Join Instil? At Instil, we believe great work starts with happy, motivated people. That's why we've built a benefits package that supports your wellbeing, growth, and life outside of work, because when you thrive, so do we. Recognition That Matters: A discretionary annual performance bonus that rewards your impact and contribution to our success. Flexibility Built In: Flexible working arrangements and summer hours, because life isn't 9 to 5, and balance matters. Financial Security: A highly competitive pension scheme with generous employer contributions, private healthcare, and life assurance for peace of mind. Health & Wellbeing: Employee Assistance Programme, mental health support, cycle-to-work scheme, and regular social events to keep our culture vibrant. Time to Recharge: 35 days holiday, enhanced maternity pay, and family first policies so you can focus on what matters most. Learning Never Stops: From courses to certifications, we'll invest in your development so you can keep growing and shaping what's next. Community & Culture: Opportunities to volunteer, give back, and be part of initiatives that make Instil a truly inclusive and connected workplace. And that's just the start, drop us a note to find out more. Company Description Instil has been delivering world class software engineering and technology solutions for over 20 years, trusted by global brands to solve complex challenges and drive innovation. From modernising legacy systems to building cutting edge applications, we help our clients navigate an ever changing digital landscape with confidence and agility. We're proud to be an award winning employer, reflecting how our people are at the heart of everything we do: Recognised as a Great Place to Work for three consecutive years, and in 2024 ranked in the Top 20 Best Workplaces in the UK for medium sized companies. Winner of Company of the Year at the Digital DNA Awards 2022, celebrating excellence in Northern Ireland's tech sector. Driven by a love for technology and a commitment to excellence, we bring together people who want to make a difference. We'll support your journey, because your success is part of ours.

We're looking for a highly skilled Principal Penetration Tester with CHECK Team Lead (CTL) status to join our dynamic security team. This is a senior, hands on role where you'll lead and deliver complex penetration testing engagements across infrastructure, cloud, web, and mobile applications for a diverse range of clients, including software, fintech, manufacturing, engineering, legal, and public sector organisations. You'll play a pivotal role in shaping our offensive security services-coordinating end to end testing, mentoring junior testers, and contributing to the evolution of our methodologies. If you thrive on tackling challenging security problems, enjoy working in a collaborative environment, and want to keep pushing your technical boundaries, we'd love to hear from you. What You'll Do Lead and execute penetration tests across infrastructure, cloud, web, and mobile applications. Manage end to end engagements: from scoping and kick off sessions to delivery and client debriefs. Produce detailed, actionable reports outlining vulnerabilities and tailored remediation steps. Stay ahead of emerging threats by researching new offensive techniques and integrating them into our methodology. Automate repetitive tasks and streamline testing processes through scripting. Mentor and coach junior testers, supporting their technical growth and career development. Enhance tools and methodologies, ensuring our services remain cutting edge. Support pre sales efforts as a subject matter expert in penetration testing. Communicate findings effectively to both technical and non technical stakeholders. Contribute to thought leadership through blogs, white papers, or speaking engagements. Essential Skills CHECK Team Lead (CTL) status - Infrastructure preferred; Applications also considered. Current UK SC Clearance. Minimum 5 years' penetration testing experience, with a proven track record of complex engagements. Proven experience in cloud security reviews (AWS, Azure, GCP). Deep expertise in web, mobile, and network penetration testing methodologies. Advanced knowledge of operating systems (Linux, Windows, Active Directory). Familiarity with cloud environments and ability to perform cloud security reviews. Proficiency with tools such as BurpSuite Pro, Nmap, Nessus, Metasploit, and Kali Linux. Strong scripting skills (Python, Shell, etc.). Excellent communication and technical report writing skills. Nice to Have Additional certifications: OSCP, CSTL/CCT, Cyber Scheme, CREST. UK Cyber Security Council Chartership (Principal or above). Experience with Hack The Box or Capture the Flag simulations. Exposure to advanced testing techniques and red team engagements. Why Join Instil? At Instil, we believe great work starts with happy, motivated people. That's why we've built a benefits package that supports your wellbeing, growth, and life outside of work, because when you thrive, so do we. Recognition That Matters: A discretionary annual performance bonus that rewards your impact and contribution to our success. Flexibility Built In: Flexible working arrangements and summer hours, because life isn't 9 to 5, and balance matters. Financial Security: A highly competitive pension scheme with generous employer contributions, private healthcare, and life assurance for peace of mind. Health & Wellbeing: Employee Assistance Programme, mental health support, cycle to work scheme, and regular social events to keep our culture vibrant. Time to Recharge: 35 days holiday, enhanced maternity pay, and family first policies so you can focus on what matters most. Learning Never Stops: From courses to certifications, we'll invest in your development so you can keep growing and shaping what's next. Community & Culture: Opportunities to volunteer, give back, and be part of initiatives that make Instil a truly inclusive and connected workplace. And that's just the start, drop us a note to find out more. Company Description Instil has been delivering world class software engineering and technology solutions for over 20 years, trusted by global brands to solve complex challenges and drive innovation. From modernising legacy systems to building cutting edge applications, we help our clients navigate an ever changing digital landscape with confidence and agility. We're proud to be an award winning employer, reflecting how our people are at the heart of everything we do: Recognised as a Great Place to Work for three consecutive years, and in 2024 ranked in the Top 20 Best Workplaces in the UK for medium size companies. Winner of Company of the Year at the Digital DNA Awards 2022, celebrating excellence in Northern Ireland's tech sector. Driven by a love for technology and a commitment to excellence, we bring together people who want to make a difference. We'll support your journey, because your success is part of ours.