java freelance jobs in London

Code First Girls is seeking experienced Java developers to provide technical 1:1 coaching for Software Engineers working with our partner companies. This is a freelance role, designed to support graduates and/ or employees professional growth over a six-month programme while helping CFG address the gender imbalance in tech.Commitment: One or more hours per...

Full Stack Java EngineerDuration: ASAP - 31st December 2027Workload: Full-time hoursSetup: Freelance (Daily Rate / BV or ZZP)Sponsorship: Not ProvidedLocation: Veldhoven, Netherlands (2 days per week onsite, 3 remote)Our client is seeking an experienced Full Stack Java Engineer to support the development and modernisation of a large-scale application...

Job Opportunity: Freelance Site Reliability Engineer (Outside IR35) £500-550 | Remote (UK-Based) | Occasional travel to Farnborough or Hammersmith Contract until 2026   We’re hiring two hands-on Site Reliability Engineers (SREs) to join a fast-moving platform team on a long-term contract. This role is ideal for engineers with strong coding skills who...

VCCP is the global challenger network for challenger brands. With more than 1,500 people across 13 offices in North America, EMEA and APAC, we challenge convention to create value for the world’s most ambitious organisations. Our founding belief is It Only Works If It All Works. That’s why we bring specialists from every discipline - strategy, AI, data,...

Company DescriptionClassRx is a STEM (Science, Technology, Engineering, Mathematics) focussed online tutoring company. Job DescriptionWe are an innovative, forward-looking organisation with a young & enthusiastic team that takes a fresh approach to education.It is important that the right candidate is methodical in its approach and can multi-task. We are...

🪐 Discover our galaxy   Join the Future of Work ! Malt is Europe's leading freelance marketplace, connecting over 1,000,000 talented freelancers with 100,000+ companies. Founded in 2013, we're transforming how work gets done through our tech-powered, human-centered platform. What makes us different: A diverse team of 600 Malters across 6 European...

About The Role What if the code you write could directly shape how the next generation of AI understands and generates software? We're looking for Software Engineers in London to build, evaluate, and improve AI-generated code — helping train AI systems to think like real developers. You'll write solutions, review AI outputs, and provide the expert-level...

🪐 Discover our galaxy   Join the Future of Work ! Malt is Europe's leading freelance marketplace, connecting over 1,000,000 talented freelancers with 100,000+ companies. Founded in 2013, we're transforming how work gets done through our tech-powered, human-centered platform. What makes us different:   - A diverse team of 600 Malters across 6 European...

Senior Software Engineer — Agentic Coding (AI Training) About The Role What if your software engineering expertise could define how the next generation of AI writes, debugs, and ships code on its own? We're looking for Senior Software Engineers in London to work at the frontier of agentic AI — building, evaluating, and improving autonomous coding...

Company DescriptionWise is a global technology company, building the best way to move and manage the world’s money. Min fees. Max ease. Full speed.Whether people and businesses are sending money to another country, spending abroad, or making and receiving international payments, Wise is on a mission to make their lives easier and save them money.As part of...

Discover our galaxy Join the Future of Work ! Malt is Europe's leading freelance marketplace, connecting over 1,000,000 talented freelancers with 100,000+ companies. Founded in 2013, we're transforming how work gets done through our tech-powered, human-centered platform. What makes us different: A diverse team of 600 Malters across 6 European countries A...

About The Role What if your years of software engineering experience could directly shape how AI writes code for millions of developers? We're looking for Software Engineers in London to evaluate, rank, and refine AI-generated code — helping the next generation of coding assistants produce solutions that are correct, efficient, idiomatic, and...

Direct message the job poster from Offroad GamesJoin Offroad Games, a fresh, London-based game studio founded by ex-Space Apes Games. We’re running two live games and tackling exciting technical challenges. You’ll be right in the action, working closely with the team on Chrome Valley Customs and Fastlane.Requirements:5+ years of client development...

JAVA Recruitment Ltd is seeking an experienced Construction Health, Safety & Environmental (HSE) Manager to lead on site safety and environmental compliance across live construction and logistics environments in Croydon.This freelance role runs for 9 weeks, starting 3 August 2026, with shifts from 8am–6pm or 7am–5pm, Monday to Friday, at GBP280 per...

Wise is a global technology company, building the best way to move and manage the world’s money.Wise is a global technology company, building the best way to move and manage the world’s money.Min fees. Max ease. Full speed.Whether people and businesses are sending money to another country, spending abroad, or making and receiving international payments,...

Company Description Wise is a global technology company, building the best way to move and manage the worlds money.Applying for this role is straight forward Scroll down and click on Apply to be considered for this position.Min fees.Max ease.Full speed.Whether people and businesses are sending money to another country, spending abroad, or making and...

Duration: Contract Workload: Full time hours Setup: Freelance (Daily Rate / Limited Company / Umbrella / Sole Trader) Location: London, UK (3 days onsite per week) Our client is seeking a Senior Software Developer in Test with strong Java automation expertise to help deliver high-quality, scalable cloud-based data and API solutions. Key...

About The Role What if the code you write could directly power the AI systems shaping how millions of people interact with technology? We're looking for Back End Developers based in London to design, build, and optimize the server-side systems and APIs that drive cutting-edge AI products — from data pipelines and model-serving infrastructure to scalable...

Get AI-powered advice on this job and more exclusive features.Associate Director @ Opus Recruitment Solutions | Shaping the Future of Tech firms (JVM - Java, Scala & Kotlin)Head of Software Engineering | £180k – Java, Machine Learning and Data DrivenI am working with an innovative tech firm that is revolutionizing industrial maintenance through...

Job DescriptionDo you have the skills to fill this role Read the complete details below, and make your application today.Company Description Wise is a global technology company, building the best way to move and manage the world's money.Min fees. Max ease. Full speed.Whether people and businesses are sending money to another country, spending abroad, or...