Full Stack Engineer

develop; Greater London; Hybrid; GBP 77,000 - 94,000; Full time

Benefits offered by this job

Private healthcare through Vitality

3% employer pension contribution with

Enhanced pension matching

Electric vehicle scheme

Family-friendly policies

Discounted gym memberships

25 days annual leave

Job summary

develop in London is seeking a Full Stack Engineer to join a fast-growing tech business focused on complex financial data and AI-enabled software. The role centers on React/TypeScript on the frontend and Java/Kotlin with Spring Boot on the backend, within a microservices framework.

You’ll work across the stack, review AI-generated code, and drive architectural decisions. You will have hands-on input, autonomy, and collaboration with a small cross-functional team.

Qualifications

• 3+ years' commercial software engineering experience.
• Experience with Java or Kotlin, ideally using Spring Boot.
• Hands-on experience with AI-assisted development tools.
• Strong testing, clean architecture, API integration and code quality.
• Able to own features across the full development lifecycle.

Responsibilities

• Take ownership of features from design to deployment.
• Develop backend services with Java/Kotlin and Spring Boot in a microservices setup.
• Use agentic AI tools to accelerate development and workflows.
• Review and refine AI-generated code for quality and security.
• Work with APIs, databases and event-driven architectures to deliver features.
• Collaborate with product/design/engineering to ship high-quality work.
• Explore new AI tools and techniques to shape engineering practices.

Skills

React

TypeScript

Java

Kotlin

Spring Boot

AI-assisted development

Full stack

Code quality

API integration

Tools

Kafka

PostgreSQL

AWS

Docker

Kubernetes

Claude Code

MCPs

Custom skills

Job description

Full Stack Engineer | London - Hybrid | Up to £85,000

I’m working with a fast-growing technology business that is transforming how people manage and interact with complex financial data through innovative software, advanced analytics and AI.

They’re looking for a Full Stack Engineer to join their growing engineering team, with a focus on React, TypeScript and backend development using Java/Kotlin and Spring Boot. This is a hands-on role within an engineering organisation that has genuinely embraced agentic AI, giving developers the autonomy to experiment with new tools, build smarter workflows and fundamentally improve how software is delivered.

You’ll have the opportunity to take ownership of features across the stack, contribute to architectural decisions and work in an environment where engineers are trusted to make decisions, challenge existing approaches and drive things forward.

What you’ll be doing:

• Taking ownership of features across the full development lifecycle, from initial design through to deployment
• Developing backend services using Java, Kotlin and Spring Boot within a microservices architecture
• Using agentic AI tools such as Claude Code, MCPs and custom skills to accelerate development and improve engineering workflows
• Reviewing, testing and refining AI-generated code to ensure quality, security and maintainability
• Working with APIs, databases and event-driven architectures to deliver new functionality
• Collaborating with product, design and engineering teams to deliver high-quality features
• Exploring new AI tools and techniques, helping shape how the wider engineering team builds and ships software

What we’re looking for:

• 3+ years' commercial experience in software engineering, ideally with a full stack background
• Experience with Java or Kotlin, ideally using Spring Boot
• Regular, hands-on experience using AI-assisted or agentic development tools, ideally Claude Code, MCPs or custom skills
• Strong engineering fundamentals, including testing, clean architecture, API integration and code quality
• Someone who can critically assess AI-generated code and apply sound engineering judgement
• A self-starter who enjoys taking ownership, working autonomously and solving problems independently
• Strong communication skills and the ability to collaborate within a small, cross-functional engineering team
• Exposure to microservices, Kafka, PostgreSQL, AWS, Docker or Kubernetes would be advantageous
• Up to £85k
• Hybrid working, 2 days per week in a London office
• 25 days annual leave, with a genuine emphasis on work-life balance
• 3% employer pension contribution, with enhanced matching options
• Private healthcare through Vitality, including discounted gym memberships
• Electric vehicle scheme, family-friendly policies and support towards professional qualifications
• High level of ownership and autonomy, with no excessive focus on rigid KPIs or bureaucracy
• An AI-first engineering environment where agentic tools, MCPs and custom workflows are actively encouraged
• Opportunity to influence engineering practices and work across the full technology stack on complex, data-driven products

If you’re a Full Stack Engineer who genuinely embraces AI, enjoys taking ownership and wants to work somewhere that is actively changing how software is built, this could be a really interesting opportunity.