18 of 18 Permanent Java Developer Jobs in London

Java Developer Low Latency Crypto Location: 3 - 4 days in London, 1-2 day from home Salary: Circa 100K 130K + Bonus + Benefits Java Developer with experience in low latency systems required by a well-established Crypto Technology Company! This is a varied, challenging role … working on live systems, improving performance, and solving the kinds of latency and connectivity challenges that directly impact trading outcomes Experience: Experience in Java or C++ within low latency environments Experience working on exchange connectivity within Crypto Comfortable working in a Linux/Unix environment Tremendous opportunity offering plenty ...

Java Developer – Low Latency Crypto Location: 3 - 4 days in London, 1-2 day from home Salary: Circa 100K – 130K + Bonus + Benefits Java Developer with experience in low latency systems required by a well-established Crypto Technology Company! This is a varied, challenging role … working on live systems, improving performance, and solving the kinds of latency and connectivity challenges that directly impact trading outcomes Experience: Experience in Java or C++ within low latency environments Experience working on exchange connectivity within Crypto Comfortable working in a Linux/Unix environment Tremendous opportunity offering plenty ...

Java Developer – SC Cleared Whitehall Resources are looking for a Java Developer – SC Cleared. This role will be remote based working with occasional visits onsite to South London, for an initial 6-month contract. ***Due to the nature of the client, this role requires active … Clearance*** ***Inside IR35*** Skills and Experience: o Backend: Java, Spring Boot, SQL/Report Writing o Cloud: AWS, EBSA o Frontend: React, Next.js (non-essential) o API development, microservices, CI/CD pipelines, containerization (Docker/Kubernetes), Greenfield development experience ...

Java Developer Low Latency Crypto Location: 3 - 4 days in London, 1-2 day from home Salary: Circa 100K 130K + Bonus + Benefits Java Developer with experience in low latency systems requiredby a well-established Crypto Technology Company! This is a varied, challenging role focused … working on live systems, improving performance, and solving the kinds of latency and connectivity challenges that directly impact trading outcomes Experience: Experience in Java or C++ within low latency environments Experience working on exchange connectivity within Crypto Comfortable working in a Linux/Unix environment Tremendous opportunity offering plenty ...

Java Developer Low Latency Crypto Location: 4 days in London, 1 day from home Salary: Circa 100K 130K + Benefits Java Developer with experience in low latency systems requiredby a well-established Crypto Technology Company! This is a varied, challenging role focused on building and optimising ...

resilient platforms. Join a team committed to modern development practices in a collaborative and forward-thinking culture. This role involves designing, building, and maintaining Java microservices and APIs within a cloud-native setting, focusing on compliance, security, and operational excellence. It's an excellent opportunity for experienced developers … thrive in dynamic, regulated environments seeking to make an impactful contribution to critical banking products. Role Overview: The Senior Java Developer will play a key role within the engineering team, responsible for delivering high-quality Java-based microservices in a cloud-first environment. The role supports ...

Credit eTrading Developer (Java) Duration : 12 Months (with renewals) Pay Rate : £750 (inside) Location : London - 4 days a week in the office I'm currently supporting a leading financial services consultancy that partners closely with front-office trading teams to deliver high-performance electronic trading solutions. This role … electronic trading Participating in peer code/design reviews Supporting QA teams and resolving production issues with a strong feedback loop Upgrading systems to Java 17, modern frameworks, and the Solace messaging platform Key Responsibilities Develop, optimise, and maintain server-side Java services for low-latency trading Implement ...

Contract Java Developer – Data Up to £700 per day Outside IR35 (6 month rolling) In office – City of London Quant Capital is hiring for a small, high-performing market maker in London. This is a junior-to-mid role focused primarily on Java development, with a secondary … PostgreSQL. This is a growing team focused on data ingestion and building tooling for the wider firm. What you’ll do: Build and enhance Java backend services (APIs, batch jobs, integrations) used across the business Write clean, testable code with solid engineering discipline (testing, code review, debugging, production support ...

their goals. The 3 G’s of RE: “Get Shit Done.” “Get Over Shit.” “Give a Shit.” We are seeking an experienced and opinionated Java Developer to join our high-performing engineering team, working on l ow latency , high-throughput systems in the payments processing domain. This hybrid … offers the opportunity to build scalable, real-time services using modern technologies. If you’re passionate about performance, have strong Core Java and SpringBoot expertise, and thrive in a collaborative yet opinionated engineering culture, we want to hear from you. Key Responsibilities : Design, develop, and optimize low-latency, high ...

Credit eTrading Developer (Java) Duration : 12 Months (with renewals) Pay Rate : £750 (inside) Location : London - 4 days a week in the office I'm currently supporting a leading financial services consultancy that partners closely with front-office trading teams to deliver high-performance electronic trading solutions click apply ...

Principal Developer – FX Trading Systems (Java/C++) Location: London or Nottingham (Hybrid) Rate: £490 per day (Outside IR35) Contract: Initial contract until end of year, with strong likelihood of extension as part of a multi-year programme. The Opportunity An established financial services organisation is seeking … experienced Principal Developer to play a key role in the architecture and development of a high-performance FX Matching Venue. This is a senior technical leadership role within a large, multi-year programme focused on building next-generation trading infrastructure. The successful candidate will combine deep Java expertise ...

Graduate/Junior Developer, Python, Linux, C#, Java - London (Teck stack: Graduate/Junior Developer, Python, Linux, C#, Java, .NET 10.0, C#, J2EE, Agile, TDD, BDD, Graduate/Junior Developer) Since 2006 our client's revolutionary marketing software platform has been helping businesses all over … customers by delivering inbound experiences that are relevant, helpful, and personalized. Having recently launched in the UK, they looking to hire Graduate/Junior Developer (Python, Linux, C#, Java)) to become a part of their ever-growing family. They believe that individual developers are in the best position ...

intuition with that, and some modern messaging like Aeron or ZeroMQ." 12+ years of experience. - Lead the development, testing, and maintenance of low-latency Java applications. - Collaborate with cross-functional teams to gather requirements and design system architecture. - Optimize application performance and troubleshoot latency issues. - Mentor junior developers … industry trends and integrate relevant technologies into projects. SKILL REQUIREMENTS - Bachelor's degree in Computer Science, Engineering, or a related field. - Proven experience in Java development, with a focus on low-latency systems. - Strong understanding of multithreading, concurrency, and performance optimization. - Experience with frameworks and libraries such as Spring ...

human-centric products within the organisation. Their mission is to transform the working lives of finance and tax professionals. Your new role A Senior Developer is urgently required to join the team, to work as part of the Tax technology team to develop and implement technical solutions that … resilient and scalable. The Senior Developer will work closely with other members of the team (designers, product owners, business analysts and developers) to deliver excellent experiences for their key clients. The Senior Developer will be required to develop ideas to find a pragmatic approach to the rapid delivery ...

Manufacturing, Life Sciences and Healthcare, Technology and Services, Telecom and Media, Retail and CPG, and Public Services. Consolidated revenues as of $13+ billion. Senior Java Engineer – Market Connectivity You have strong core Java development with market connectivity experience You have strong experience with multi-threading, messaging & ZeroGC techniques … know how to use memory profilers and look at heap dumps You are degree educated, Computer Science preferred or any STEM Minimum Java experience: 10 years Preferred Skills: TransFICC Experience, highly desirable Hot Code path optimization, Off-heap memory management techniques JVM internals, tuning for low-latency Low-latency ...

Tech Lead (Java & React) – Media Industry £750 - £850/day Outside IR35 London (Hybrid) We’re looking for a hands-on Tech Lead to step into a high-impact role on a media platform that urgently needs strong technical leadership. This is an opportunity to take ownership … engineering best practices and code quality Improving team performance and delivery pace Collaborating with global product and technical stakeholders Contributing hands-on across a Java (backend) and React (frontend) stack Helping rebuild confidence in a key global project What We’re Looking For Proven experience as a Tech Lead ...

Your new company A leading consultancy sitting within their market-leading tax practice is renowned for delivering sustainable growth and empowering people to shape their careers. They are responsible for the innovation and development of ...

international environment, focusing on building secure, scalable, and innovative financial systems that power global banking services. We are currently looking for a Senior Fullstack Developer (Java+React) to join the team. The role involves working in a modern microservices architecture and contributing to the development of scalable and efficient applications. … ideal profile is a FullStack Developer with both backend and frontend expertise. The expected skill distribution is approximately 60% backend (Java/microservices) and 40% frontend (React), with flexibility depending on experience. Requirements : Java, Spring Boot, Microservices, Node.js, TypeScript, React. Location: London (hybrid) 🔥 We build real ...