Java Fullstack Engineer - London (Hybrid) - Inside IR35

Job Description

Java Fullstack Engineer - London (Hybrid) - Inside IR35 on www.freelancermap.com Find projects Find freelancers Solutions Insights Log in Sign up Change availability Save Java Fullstack Engineer - London (Hybrid) - Inside IR35 iBSC Contact person : Generic Network London , United Kingdom On-site Agency contract (e.g. ANÜ) Duration 12 months Apply now Save to watchlist Print Report Report project After submitting, you will receive a confirmation email. We will review your information and take action if necessary. Reason for reporting this project: * The project is outdated The project description is unprofessional / This is not a valid project Incorrect contract type The hourly rate is unrealistic Report project Report project IT Java (Programming Language) Scrum Methodology Full Stack Development Description JOB TITLE: Principal/Lead Java Software Engineer (Hands-On) LOCATION: London - Hybrid - 3x days a week onsite DURATION: 6 - 12 Months Rolling RATE: £400 per day, all inclusive THIS PROJECT IS INSIDE IR35 We are looking for a highly technical, hands-on Principal-level Java Engineer to take ownership of the strategic technical direction for a critical automation platform. This is not a pure management role - you will be in the code daily, leading Scrum teams, refactoring Legacy systems, and acting as the ultimate technical gatekeeper for design and code quality. If you are already using AI-powered coding tools daily to accelerate delivery and have deep experience with modern version control (including JJ), this role will play to all your strengths. Key Responsibilities Own the overall technical roadmap and strategic direction for the platform. Design end-to-end solutions (Back End to Front End) using cutting-edge technologies and industry best practices. Get hands-on daily - refactoring Legacy applications, shipping new features, and bolstering existing software. Lead the Scrum process - build and prioritise the development backlog to deliver high-impact automation solutions. Act as the principal sign-off authority for all technology choices, design documents, and code reviews. Mentor and guide multiple Scrum teams, acting as the go-to technical expert for the entire department. Essential Skills & Experience (Must-Haves) Extensive experience developing and deploying modern development methodologies at scale Extensive experience with Java 8 + (ideally 17+ ), REST API best practices, and SQL optimisation Extensive experience with modern version control ( Git; JJ ) Demonstrable Agile experience (Scrum or Kanban) Demonstrable experience leveraging agentic code harnesses for planning, code generation, quality enforcement, and delivery Experience contributing to and delivering software architectures for hand-off and implementation Experience with modern automated testing (Pact; TDD; BDD) and CI/CD pipelines Nice-to-Have (Bonus Skills) These are not essential, but candidates with any of the following will stand out: Some exposure to Legacy web application frameworks (eg, Zk or Django ). Some experience creating and delivering network automations (eg, using Ansible, Python scripts, or similar). About You You are a Principal/Staff-level engineer who is equally comfortable white-boarding a high-level system architecture and drilling down into a complex SQL query or a tricky Git/JJ merge conflict. You are passionate about leveraging AI to make your team faster and more efficient, and you have the maturity to be the final decision-maker on technology and code quality. Application form For freelancers Find projects Benefits for freelancers Prices and features Professional liability insurance For companies Find freelancers Benefits for companies Prices and features Help and support FAQ Contact Blog Freelancer study Company directory About freelancermap About us Testimonials © 2005 ‐ 2026 freelancermap GmbH, Nürnberg Data privacy Legal information Term and Conditions