Senior Full Stack Developer
Date: Jun 10, 2026
Location: London, GB, EC2N 4BQ
Company: sthreemana
SThree is the global STEM-specialist talent partner that connects sought-after specialists in life sciences, technology, engineering and mathematics with innovative organisations across the world. We are the number one destination for talent in the best STEM markets: Recruiting highly skilled professionals and discovering life-changing jobs for the unsung heroes who will positively shape our future. Elevating expertise and energising progress for everyone.
Operating through a global house of specialist recruitment brands we know how to achieve the goals of STEM professionals seeking both permanent and contract work and understand the organisations who need them. The world is changing. And the people who change the world work with us.
What you'll be working on
As part of a small, high‑impact software engineering team, you’ll:
- Design, develop, test, and support end‑to‑end solutions across Java (11+) back‑end and React (18+), TypeScript, JavaScript, HTML & CSS front‑end layers
- Shape user experiences by producing wireframes, prototypes, and UI designs
- Build and maintain UI‑driven automated tests and follow strong TDD practices
- Collaborate with business and technology stakeholders to deliver meaningful outcomes
- Integrate with wider enterprise systems (e.g. CRM, ERP, identity platforms)
- Configure and maintain CI/CD pipelines and infrastructure‑as‑code (e.g. Terraform)
- Support live systems and resolve issues end to end
- Coach and mentor junior engineers, fostering knowledge sharing and collaboration
AI‑first development
This role is hands‑on with AI‑enabled engineering. You’ll be expected to:
- Use AI coding assistants for refactoring, test creation, debugging, and documentation
- Deliver measurable productivity improvements through intelligent AI usage
- Share learnings, document patterns, and train others during service handovers
- Apply sound judgement on when to rely on AI and when human expertise matters most
What we're looking for
Essential experience:
- Extensive experience building web applications on a Java technology stack
- Strong experience with React, TypeScript, JavaScript, and modern UI development
- RESTful API design and implementation
- CI/CD, test automation, and Agile delivery experience
- Cloud experience in Azure, including security, scalability, and performance fundamentals
- Strong communication skills and a collaborative mindset
Nice to have:
- Experience with Liferay DXP
- Knowledge of Azure Integration Services (API Management, Service Bus, Event Hub)
- Experience with identity platforms such as Azure AD, Azure AD B2C, or AWS Cognito
Why join us?
- Be part of a collaborative, inclusive IT function with global impact
- Gain exposure to end‑to‑end IT asset management in a complex, international environment
- Opportunities to drive improvements and put your ideas into practice
- A supportive team that values customer focus, ownership, and continuous improvement
What's in it for you?
- Hybrid working options for flexibility.
- Bonus linked to company and personal performance.
- 28 days holiday plus public holidays, with an annual leave purchase scheme.
- Private healthcare, discounted dental insurance, and health cashback scheme.
- Paid volunteering days and caregiver leave.
- Access to retail discounts and our company share scheme.
Salary Range is [[salaryMin]] - [[salaryMax]]
This salary range reflects the expected compensation for this role based on skills, experience, and market benchmarks. Final offers will be determined using objective criteria such as relevant experience and internal pay equity.
What we stand for...
We're committed to ensuring for our colleagues, candidates and communities, that all processes are equitable, and everyone is treated with fairness and dignity where everyone belongs, is valued and is connected.
We create community and deliver change that transforms the future for everyone. With this in mind, we're committed to ensuring for our colleagues, candidates and communities, that all processes are equitable and everyone is treated with fairness and dignity where everyone belongs, is valued and is connected.
We are committed to creating an inclusive workplace and welcome applications from everyone. If you need any assistance or reasonable adjustments in submitting your application and through the hiring process, please let us know, and we'll be happy to help.