Senior Full-Stack Engineer - Hybrid London (Java/Kotlin & React)

Formula.; Manchester; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Hybrid London working

Strong technical standards

Job summary

Formula. is seeking a Senior Full Stack Engineer to join a backend-led, full-stack team building JVM-based services using Kotlin or Java and frontend interfaces in React and TypeScript.

You'll work on technically challenging projects, contribute to architecture discussions, code reviews, and API design, with hybrid work from London 2 days per week. If you enjoy AI-assisted tooling and strong engineering standards, we'd like to hear from you.

Qualifications

• Strong commercial experience with Kotlin or modern Java, ideally Java 17+.
• Frontend experience with React.js.
• Familiarity with CI/CD, relational databases and agile development.
• Curiosity about AI-augmented engineering and a willingness to develop new ways of working.

Responsibilities

• Build and maintain JVM-based services using Kotlin/Java; develop APIs and integrations.
• Deliver end-to-end features; connect backend with React/TypeScript UI.
• Contribute to technical discovery, architecture discussions, and API design standards.
• Collaborate with engineers and stakeholders to deliver robust technical solutions.
• Experiment with AI-assisted engineering tools and validate outputs for correctness and security.

Skills

Kotlin/Java

React.js

APIs & reliability

AI curiosity

Education

Bachelor's degree

Tools

CI/CD

Relational databases

Security best practices

Job description

Formula. is seeking a Senior Full Stack Engineer to join a backend-led, full-stack team building JVM-based services using Kotlin or Java and frontend interfaces in React and TypeScript.

You'll work on technically challenging projects, contribute to architecture discussions, code reviews, and API design, with hybrid work from London 2 days per week. If you enjoy AI-assisted tooling and strong engineering standards, we'd like to hear from you.