Jobs for java backend developer at London

About usAt Trainline, our purpose is to empower greener travel choices, connecting people and places. Trainline enables millions of travellers to find and book the best value tickets across carriers, fares, and journey options through our highly rated mobile app, website, and B2B partner channels. Great journeys start with Trainline 🚄 We’re Europe’s...

 Backend Engineer – C# / .NET Remote (Possible relocation to the UAE) Working Hours: 6 hours aligned to Working Hours in the UAE Employment Type: Full-timeSalary: AED 240,000 – AED 360,000 per annum About the Role We are looking for a skilled Backend Engineer with strong experience in C# and .NET to join a fast-paced engineering team building scalable,...

Senior/Staff Backend Developer — Scroll Home (Hybrid, London) Scroll Home is a video-first property discovery app launching in London over the next two months. Full-screen walkthroughs, a personalised feed, one-tap enquiries, in-app group chats, comments, profiles and likes. Property search hasn't changed in 20 years. We're changing it. We are in the final...

Job DescriptionMy client, a startup in London, is looking for a Lead Software Engineer (Backend Platform Services). For full details, please apply.At A Minimum, We Would Expect -Enthusiasm for developing technologies to solve real problems -Demonstrable coding skills -Confidence to challenge our engineering customs and practices -Overwhelming desire to ‘do...

Software Engineer / Developer (Java Kafka API) London / WFH to £90kAre you a Java technologist seeking a role where you can work on ground breaking technology, continually learning and progressing your career?You could be joining a global technology consultancy.What's in it for you: Salary to £90kHybrid working (x2 days WFH per week)Pension, Life...

hackajob is partnering directly with AND Digital to hire for this role. Who We Are:AND Digital are a tech company focused on accelerating digital delivery and dedicated to closing the digital skills gap. We've been helping organisations build better digital products and stronger digital teams since 2014. We believe our work should always leave a legacy for...

DescriptionFuse Energy is an energy startup on a mission to make energy abundant and affordable, fast. We combine first-principles thinking with cutting-edge technology to build a radically better energy system.We've raised over $200M from top-tier investors including Balderton, Lakestar, Accel, Creandum, Lowercarbon, Ribbit, 20VC, Hummingbird and...

Your new company My clients are looking for an AI Application Developer who can join their team on a 6-month contract basis. The role is remote working with the occasional travel into the office in London. The rate is £450 per day inside IR35. Someone with a banking background is key for this role. Your new role My clients are seeking an experienced AI...

Octopus Energy started with a bold idea: to build Britain’s first truly digital energy supplier. By combining world-class tech with brilliant humans who care deeply about customers and driving the renewable energy transition, we made it happen and in 2025, we became Britain’s largest energy supplier. Now, we’re scaling fast and building the next...

The Subscriptions mission helps people discover the right Spotify experience for them and supports the entire journey from free to paid. Our teams build products and services that make it easier for listeners around the world to understand the value of Spotify Premium while enabling sustainable growth for the business.The Markets & Subscriptions team...

DescriptionAbout Us: Solirius Reply, part of the Reply Group, is a technology consultancy and digital transformation partner that helps organisations solve complex challenges through strategy, design, engineering, and delivery.We work closely with our clients to deliver secure, accessible, user-focused services that evolve with their needs. By combining...

Wise is hiring a Backend Software Engineer for the Pricing Core team in London. You will design, develop and maintain backend services in Java with Spring Boot on AWS, enabling scalable pricing platforms used across Wise products.Join a high-throughput environment processing 100+ million requests daily, contributing to architecture decisions and ensuring...

Backend Software Engineer / Developer (C# .Net SQL) *London onsite* to £180k+Are you a technologist Backend Software Engineer with a record of academic achievement? You could be progressing your career working on complex and challenging systems at a Hedge Fund with over $17 billion under management. As a Backend Software Engineer you'll collaborate with a...

This role is with one of Dex's trusted partner companies. We work closely with their teams to truly understand their culture, goals, and what they're looking for, so we can match you with the right opportunity and give you context about the role before you commit to a process. If you're interested sign up to Dex to apply. Dex is an AI recruiter agent that...

This is a free training course followed by the potential for a role with one of our clients. Title: Java Support Engineer Job location: London, UK, 2 days per week Description: These job roles are linked directly to free education, and upon completion of our course, you will be equipped to start your new role. THE ROLE:Our clients are looking for a Java...

Job Description Role Overview This role focuses on building backend services for a capital markets SaaS platform used by financial institutions to manage trading, post-trade, and operational workflows. You’ll work on scalable, production-grade systems that sit at the core of institutional market infrastructure. Key Responsibilities Design and develop...

Octopus Energy started with a bold idea: to build Britain’s first truly digital energy supplier.Key ResponsibilitiesTake independent ownership of medium-sized technical features and components, delivering stable and production-ready code with minimal supervision.Ship continuously to trunk - small PRs, fast feedback, no release trains. You'll be working in...

Junior Backend Software Engineer. LondonAbout AntareJoin Antare as we go to market. We’ve been busy building the physical security intelligence platform of the future. Our always-connected platform automatically detects risks, captures evidence and reports on real-world events as they happen, delivering intelligent insights through an intuitive user...

Full Stack Developer (Outside IR35) Contract Length: 6 Months Location: London (Remote) Hours: 40 Hours per Week Start Date: ASAP Overview Our client, a leading organisation within the insurance sector, is seeking an experienced Full Stack Frontend Developer to support the delivery of modern digital platforms and customer-facing applications. This role...

About 9fin9fin is the AI platform powering global debt markets — the world's largest asset class at over $145 trillion.Debt markets are vast, global, and mission-critical, yet still run on fragmented data, PDFs, and manual workflows.Are you the right candidate for this opportunity Make sure to read the full description below.9fin replaces this broken...