1 to 25 of 61 Permanent Java Engineer Jobs in London

Senior/Principal Software Engineer - Java/Kotlin Tier One Investment Banking Project £90,000-£130,000 basic salary We’re looking for a seasoned engineer to lead a greenfield project for a top-tier investment bank. You’ll be at the forefront, shaping data warehousing tools more »

Principal Java Engineers - 3 days a week in London - £135k We are looking for 10 x Principal Java Engineers to work for a financial client of ours Stack - Java, TDD, CI/CD, Kubernetes/Docker. Candidates must ideally have lead experience, whilst remaining hands on coding more »

Role: Java Engineer Location: London (2x per week onsite) Calling all J ava engineers with experience in Java , Scala and ideally commercial and enterprise applications! We are currently supporting a leading SaaS provider, based in London, who are on an exciting journey of transformational growth. As a … predictability across their IT environments. This supports in enhancing IT team efficiency, reducing alert fatigue, and proactively identifying trends. They are looking for a Java Engineer with the following skillset: Over 6 years of experience in software development, particularly in commercial or enterprise environments. More than 4 years … of focused Java development , dedicated to producing clean, maintainable, and thoroughly tested code, while actively pursuing modern software engineering methodologies. Proficiency in Kotlin and/or Scala programming. Experience in designing and scaling machine learning applications. Familiar with testing frameworks such as JUnit. Solid understanding of RESTful APIs and more »

Multi-threading, Core Java, FIX, API – High Frequency Trading. Low Latency Trading Developer – London City – FX Trading Harrington Starr has partnered with a FinTech who specialises in FX Trading to hire a Core Java Engineer (Low Latency, Multi-threading, FIX) that will join the High Speed team … to build out their trading systems. Key requirements; Core Java Development experience (Required) Experience with Low Latency & Multi-threaded development experience (Essential) Knowledge of FIX or API Development. Passion for clean robust code (Required) Must have a degree (2:1 or above) from a STEM degree If you are more »

Principal/Senior Java Engineer (Greenfield Project) London - Hybrid working £100,000-£140,000 We are looking for Principal and Senior Java Engineers to lead a greenfield project focusing on markets data monitoring and building modern, scalable solutions. This is a unique opportunity to work on cutting … for high-performance, secure environments. Evangelize Test-Driven Development (TDD) and SOLID principles, helping to shape the engineering culture within the bank. Work with Java 21 and a modern wider tech stack, including Kafka and S3 Collaborate with cross-functional teams to design and deliver innovative solutions that address … player in a modern and evolving tech stack as we transform the way we handle markets data. What You’ll Bring: Extensive experience with Java (Java 17+) and modern features such as streams, records, and data classes. A strong foundation in TDD, SOLID principles, and experience evangelizing TDD more »

built on 25 years of imaginative technology that our teams improve on every day. Job Description The Team We are looking for a Software Engineer to join our OpenServices team as we continue to work on the next generation of online sports betting platforms. The OpenServices team is made … the No.1 pit-stop crew for the world’s top sports betting brands, including SkyBet, Paddy Power, William Hill, Ladbrokes & Coral. As a Software Engineer with OpenBet , you’ll help improve the functionality and performance of our systems, and we’ll give you extensive training, support and mentoring as … you take our solutions and your career to the next level. What you’ll be doing As a Software Engineer with the OpenServices Team, you’ll have exposure to complex systems, as well as having extensive training and mentoring as you take our solutions and your career to the more »

Senior Java/Kotlin Engineers Our client is looking for multiple Senior Java/Kotlin Engineers to work on a new project 2-3 days a week in London (They may flex on this, so if you do need remote in the UK, please apply) Candidates must be … UK based, they will not provide sponsorship. Tech Stack - Java, Kotlin, TDD, Docker/Kubernetes. Salary - £105k - 120k + Pension more »

Mid-Senior Full Stack Java Engineer LONDON BASED ONLY - NO SPONSORSHIP Full-time, Permanent Job Description: We are seeking a highly skilled Mid-Senior Full Stack Java Engineer . This is an exciting opportunity for someone who has strong experience with both backend and frontend development … using Java as the primary backend language. You will work on a range of challenging projects, contribute to the development of scalable web applications, and play a crucial role in building high-performance, secure, and scalable software solutions. We are looking to build out a portfolio of talented Java candidates to fuel our client's growth. You will be considered for future long-term opportunities as we expand our footprint within the Java ecosystem. K ey Responsibilities: Develop, test, and maintain robust and scalable full-stack Java applications. Work closely with the product, design, and engineering more »

Java Developer - Back End with AWS SJIT are hiring Software Engineers for a 9 month remote project , working with a leading Global Big Four client. The project is part of a large AWS migration and experience with AWS and Infrastructure automation is critical. The work includes migration to JDK17 … tests. (The migration of data is not in scope) The role will need a mix of experience, the following a key to being successful: Java Backend Development Infrastructure Automation (CloudFormation, CDK) Terraform/DevOps/IaC Automation Service infrastructure migration Amazon Web Services Networking You'll be working on more »

Senior & Principal Java Engineers A top client of ours are looking for several seasoned Java Engineers eager to lead on a high-impact, greenfield project. This will be a financial trading systems project which will span several years. You’ll join at the discovery phase, shaping both the … Responsibilities: Shape the technical direction of the project from the ground up. Collaborate on key technical decisions and team growth. Work hands-on with Java, TDD, and CI/CD pipelines to ensure delivery-focused outcomes. Experience using data warehousing tools. Location: Hybrid (3 days per week in the more »

Java Developer - London The company Join one of the fastest growing financial technology companies in the trading sector. They are a market maker that combine cutting edge financial technology with human expertise and are developing next generation automated trading software This is an unmissable opportunity for a Java Developer to join their team of incredibly bright engineers in London . This opportunity would suit a Java developer in London who is looking to take the next step in their career. What you will get Flexible working and work from home opportunities. A chance to work in … edge financial technology solutions. Work within an Agile environment. Learn from some of the best engineers in the market. What you will need Strong Java development experience Understanding of databases (SQL Server, Postgres e.g.) Experience with Agile methodologies and TDD. Familiar with developing and deploying in the cloud. (AWS more »

Payments space. They are on the lookout for a Mobile QA to come in on a contract basis. Key Skills/Requirements: Espresso experience Java experience XCUITest experience API Testing experience Functional Testing experience Contract is running until the end of 2024 initially with likely extensions, paying up to more »

Software Engineer | Java & JavaScript Roles Available | Up to £100,000 + 15% bonus | eDV Clearance required | Consultancy | London | Hybrid (2-3 days per week onsite) | 2 stage interview process MERITUS are working with a global consulting organisation looking to grow their national security division in the UK. They … software engineers to join their team to work on critical projects within the defence/national security sectors. They're core tech stack is Java, JavaScript (Node/React) & operate in a highly Agile/Scrum environment. They're flexible on experience & skillset so if you don't have … based in London & operate hybrid working with 2-3 days per week onsite. Active eDV clearance is essential. Main Responsibilities: Full lifecycle development in Java, JavaScript (Node/React) on secure applications & systems. Liaising with internal stakeholders to ensure project requirements are adhered to & project deadlines met. Developing solutions more »

high-performance environment (and top of the class in their field), meaning your performance-related bonus will be better than most. They're a Java house, so previous experience building Risk systems in Java is a must here. If you've got exposure/an understanding of Equities more »

Java Messaging Developer The role is within the global messaging team. The team is responsible for delivering advanced Messaging APIs, developing tools, administering, supporting low latency, high throughput messaging system for the Capital market. We provides a shared service platform serving applications running on Windows and Linux operating systems … written in languages including C++, Java, Python, and C#. The team is multi-discipline supporting diverse range of application for Front/Middle Office, Settlements and Regulatory systems. As senior Java developer, you will take ownership of in-house developed enterprise Java messaging API codebase, embedded in … owners and infrastructure teams. This is an exciting opportunity to work with a wide range of technologies developing on programming skills in Python/Java/C++/C# and administering/supporting one the most advanced messaging system in the market. Key responsibilities: Ownership of Java codebases. more »

Java Developer London - 4 days a week £90k Imagine stepping into a world where AI isn’t just a buzzword, but the cornerstone of decision-making. Founded by a group of MIT technologists, thus company has its sights set on revolutionizing the AI landscape. With a global footprint but … giving organizations the competitive edge they need in an era where intelligence is more than artificial—it’s essential. They are currently seeking a Java Developer to: Develop and maintain backend services with Java and Spring to power AI-driven solutions. Focus on building backend layers that communicate … Kotlin and exploring services with Go—being language-agnostic is key to thriving in their environment. Collaborate with the team as they evolve from Java to new languages and frameworks to meet the demands of the future. 🚀 Scalable Solutions: Work on platform architecture, ensuring it scales to support multiple more »

Senior Java Developer - Systematic Hedge Fund - London - Up to £350k TC A front office development team for one of London's top-performing systematic Hedge Funds is looking for an experienced Java Developer to join the collaborative team. The firm has had multiple years of strong performance and … about systematic trading and apply any previous experience you may have into the field. On top of this, the business is pushing into using Java 21 Responsibilities: Design and develop end to end core trading systems, covering algo development as well as OMS and EMS development. Working with Traders … trading strategies. Market Data integration and processing of real-time data feeds Latency optimisation and performance tuning for latency sensitive trading systems. Requirements: Excellent Java development skills, with previous experience designing and building systems from scratch. Previous experience building algo trading and execution systems. Proven ability to write clean more »

value creativity, collaboration, and a drive for excellence. What You'll Do: Lead the design, development, and deployment of new features and products using Java, TypeScript, React, and Kotlin. Work closely with product managers, designers, and other engineers to develop scalable and maintainable software solutions. Participate in architectural decisions … in code reviews, testing, and debugging to maintain high code quality and performance standards. What they're looking for: Extensive Experience: Strong proficiency in Java, TypeScript, React, and Kotlin. Greenfield Expertise: Proven track record of building new systems from scratch. Problem Solver: Ability to tackle complex technical challenges and more »

have the opportunity to make a significant impact and shape the future of fintech. Position Overview: They're seeking a talented and passionate Software Engineer to join our start-up team. As a pivotal member of their development team, you'll play a crucial role in building and scaling … Responsibilities: Collaborate closely with cross-functional teams to design, develop, and deploy scalable software solutions. Write clean, efficient, and maintainable code using Kotlin, Groovy, Java, and other relevant languages. Develop microservices architecture using Spring Boot and deploy applications on Kubernetes clusters. Implement logging, monitoring, and analytics solutions using Elastic … environments and provide timely resolutions. Requirements: Bachelor's or Master's degree in Computer Science, Engineering, or related field. Proven experience as a Software Engineer, preferably in a start-up environment or fintech industry. Proficiency in Kotlin, Groovy, Java, and Spring Boot. Experience with containerization and orchestration tools more »

Global Investment Bank, a leading player in the FX Banking sector, seeks a Java Software Engineer. Working on a Global trading platform that provides a full suite of E-Trading applications to clients and internal users. This role involves working closely with trading, front office and research as part … well as the continuous introduction of the latest low latency technology and architecture. The ideal candidate must have the following skills and qualities: Strong Java development skills, including experience with multi-threading. Experience in an E-Trading business and/or experience in high-performance/low-latency development. …/equivalent degree Strong communication skills Previous Investment Banking Experience Happy to work 2-3 days per week in office Desired Skills and Experience Java Low Latency Development Investment Bank EFX Rates Equities Threading Application programming Front Office McGregor Boyall is an equal opportunity employer and do not discriminate more »

Java Software Engineer - Java, Spring Framework, Microservices, REST, API platform development, Reactive programming, Kubernetes. Description for the Java Developer role:- Fantastic opportunity to join a very well funded award winning Fintech based in central London as a Java Developer. As a key member of the … for building and maintaining highly scalable and secure web applications, services, and APIs. You will have several years commercial back end development experience in Java and Spring, ideally for a product based company. Any experience in Microservices and Kubernetes would be highly advantageous. The role is mainly remote, however … London). You will have a great opportunity to work with a variety of languages, frameworks and tools. Core skills/experience for the Java Developer role: 3yrs+ commercial Development experience Strong Java and Springboot Built and maintained highly scalable and secure web applications, services, and APIs. Worked more »

Senior Java Engineer - £110k + Bonus Are you a seasoned Java Engineer eager to lead on a high-impact, greenfield project? We are collaborating with a top-tier investment bank, creating innovative data warehousing tools to pull critical data from trading systems for regulatory compliance. You … Responsibilities: Shape the technical direction of the project from the ground up. Collaborate on key technical decisions and team growth. Work hands-on with Java, TDD, and CI/CD pipelines to ensure delivery-focused outcomes. Ideal Experience: 5+ years of solid Java experience. Strong knowledge of TDD more »

A forward-thinking fintech company is seeking an experienced Back-End Java Engineer to drive the development of innovative payment solutions and subscription platforms. As part of a dynamic team, you’ll play a key role in shaping systems that handle high-volume financial transactions, streamline customer onboarding … and scalability. Maintain high standards of code quality, performance, and security, while contributing to continuous improvement initiatives. What We’re Looking For: An experienced Java Engineer with a strong background in backend development, familiar with Spring Boot and modern Java versions. Proven ability to design and implement more »

Technical Lead Java Engineer Salary: £100 000 - £120 000 We have partnered with a company seeking a Lead Java Engineer to take their digital products to the next level. They need someone who will be the most technical engineer in the team, leading the technical … teams to drive innovation. Utilise your experience with AWS to build and optimise cloud-based solutions. What We’re Looking For: Extensive experience in Java, Kotlin and Spring Boot. Proven track record in leading technical teams and projects. Strong background in architecture design and AWS. Passion for hands-on … coding and problem-solving. Technology Stack: Java, Kotlin, Spring Boot, GraphQL, AWS Location: London - 2 days a week in the office Salary: 100 000 - 120 000 If this sounds like something, you would be interested in please reach out to me on my email at ehartman@welovesalt.com. more »

Mid-Level Java Engineer My client is a leading financial services firm dedicated to providing innovative solutions and cutting-edge technology in the finance sector. With a commitment to excellence, they are seeking a talented and experienced Mid-Level Java Engineer to join our dynamic team. … passionate about finance, technology, and thrive in a collaborative environment, we invite you to apply. Responsibilities: Design, develop, and maintain high-performance and scalable Java applications. Collaborate with cross-functional teams to understand project requirements and translate them into technical specifications. Implement best practices for software development, ensuring code … contribute to a culture of continuous improvement. Qualifications: Bachelor's degree in Computer Science, Engineering, or related field. 3+ years of professional experience in Java development. Solid understanding of Kotlin and experience in using it for building robust applications. Proficiency in the Spring framework, including Spring Boot. Hands-on more »