Senior Java Kotlin Engineer jobs in London – Browse 3,896 openings on RoboApply Jobs

Senior Java Kotlin Engineer jobs in London

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Contract|Hybrid|London, England, United Kingdom

We are seeking a highly skilled Contract Senior Java / Kotlin Engineer to join our dynamic team.Work Location: On-site, 2 days per week in Spitalfields, LondonKey Requirements: Proven expertise in Java or Kotlin (back-end development) and a strong commitment to Test-Driven Development (TDD).Expected Start Date: Mid MarchAbout Us:At AND Digital, we are a forward-thinking tech company dedicated to enhancing digital delivery and bridging the digital skills gap. Since our inception in 2014, we have empowered organizations to create superior digital products and foster robust digital teams. We pride ourselves on the impactful nature of our work, making a significant difference for our clients through our regional offices (referred to as ‘Clubs’), which enable us to build strong, lasting partnerships. This model has not only driven our clients' success but has also facilitated our remarkable organic growth, expanding our team to over 1,300 professionals across the UK, Europe, and the USA, with ambitious plans for global expansion in the coming years.Join us on our mission to close the global digital skills gap!Your Role:Collaborate within a cross-functional team comprising software developers, technical product owners, and testers, all aligned towards developing JVM applications using Test-Driven Development and Pair Programming.Lead the design and implementation of our systems with a clear understanding of the context and purpose behind each project, while continually seeking opportunities to enhance our systems and workflows.Provide mentorship and coaching to fellow team members.Possess extensive knowledge of Java or Kotlin programming languages (5+ years of experience).Demonstrate in-depth knowledge and hands-on experience working within a cross-functional, agile development team.Have at least 3 years of practical experience in Test-Driven Development and a keen interest in Pair Programming.Equal Opportunities Commitment:We are proud to be an equal opportunity employer and welcome applications from all qualified individuals. We actively encourage applications from women, ethnic minorities, and individuals with disabilities. We are open to discussing flexible working arrangements, depending on the specific requirements of the role. Where reasonable adjustments are required, we will make every effort to accommodate them.

Mar 3, 2026
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Full-time|Hybrid|London, England, United Kingdom

Role Overview AND Digital is hiring a Senior Java / Kotlin Engineer to join the team in London. This is a hybrid role, requiring on-site presence two days per week in either Leeds or London. About AND Digital Since 2014, AND Digital has worked with organizations to deliver digital products and strengthen digital teams. Our regional 'Clubs' model helps us build close partnerships with clients, providing dedicated, local support. Today, over 1,300 people work across our Clubs in the UK, Europe, and the USA. The company continues to grow organically, with plans to expand globally. AND Digital aims to close the digital skills gap and deliver lasting impact for clients and their teams. What You Will Do Work within a cross-functional team of developers, technical product owners, and testers to build JVM applications using Test Driven Development and Pair Programming. Lead system design and implementation, considering the broader context and looking for ways to improve systems and practices. Mentor and coach team members. What We’re Looking For Extensive hands-on experience in Java or Kotlin (back-end), with at least 5 years of professional development. Strong background in Test Driven Development (minimum 3 years) and an interest in Pair Programming. Experience working in cross-functional, agile teams. Inclusion and Flexibility AND Digital is an equal opportunity employer. Applications are encouraged from women, ethnic minorities, and individuals with disabilities. Flexible working arrangements are considered, depending on the requirements of the role. Reasonable adjustments are made to accommodate individual needs.

Apr 16, 2026
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companyLendable logo
Full-time|On-site|London

Join Lendable on Our MissionLendable is dedicated to revolutionizing the way people access credit and save money with cutting-edge technology. As one of the leading fintech companies globally, we have made remarkable strides:Recognized as one of the UK’s newest unicorns, with a dynamic team exceeding 700 members.Ranked among the fastest-growing tech companies in the UK.Maintained profitability since 2017.Supported by prestigious investors such as Balderton Capital and Goldman Sachs.Highly rated by our customers, boasting a 4.9 rating on Trustpilot from thousands of reviews.To date, we have completely reimagined the Big Three consumer finance products: loans, credit cards, and car finance. Our goal is to deliver funds to our customers in minutes rather than days.As we expand rapidly, we are setting our sights on the two largest Western markets (the UK and US), where trillions of dollars in financial products are managed by traditional banks utilizing outdated systems and cumbersome processes.Your Opportunity to Make an ImpactEmbrace Ownership: You will have the authority to make decisions that significantly influence the trajectory and success of Lendable from day one.Collaborate with Talented Teams: Work alongside exceptional individuals who are driven to solve problems and innovate beyond conventional solutions.Develop Cutting-Edge Technology: Build state-of-the-art solutions internally, leveraging new data sources, machine learning, and AI to optimize processes.About the Role:We are excited to welcome a Senior Kotlin Engineer to our expanding team. This role offers a unique opportunity to contribute fresh insights and expertise to our design discussions, aiding in the development of sophisticated solutions to complex engineering challenges during our growth phase. Our tech team, currently comprising around 80 skilled professionals, has been pivotal in transforming the finance landscape with our next-generation lending platform.

Sep 23, 2025
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companyLendable logo
Full-time|On-site|London

Join Lendable's Innovative TeamLendable is on a transformative journey to develop the most advanced technology that empowers individuals to secure credit and save money efficiently. As one of the fastest-growing fintech companies in the UK, we are proud to have:Established ourselves as a unicorn with a talented team of over 700 professionals.Achieved profitability since 2017.Received backing from prestigious investors, including Balderton Capital and Goldman Sachs.Earned exceptional customer satisfaction ratings, holding a 4.9-star rating on Trustpilot.We have successfully reimagined the core consumer finance products: loans, credit cards, and car finance. Our mission is to expedite access to funds, ensuring customers receive money within minutes rather than days.As we scale our operations, we are targeting the two largest Western markets (UK and US) where traditional banks still use outdated systems and cumbersome processes.Your RoleWe are excited to invite a Senior Kotlin/JVM Engineer to our dynamic team. This position offers a unique opportunity to contribute your expertise and fresh perspectives to our design processes. You will play an integral role in crafting elegant solutions to complex engineering challenges within our innovative fintech platform. Join a tech-savvy team of around 80 engineers who are dedicated to reshaping the future of finance.

Dec 22, 2025
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companyhyperexponential logo
Full-time|On-site|London

About hyperexponential hyperexponential builds AI-driven software for the insurance sector, helping companies make critical decisions in a $7 trillion industry. The platform supports processes ranging from rocket launches and autonomous vehicle deployments to disaster recovery. Backed by a16z, Highland Europe, and Battery Ventures, hyperexponential partners with nearly 50 major insurers, processes billions in premiums, and has maintained a zero churn rate. The company’s platform has grown from a single product into a suite of tools supporting every stage of pricing and underwriting. AI is central to this work, powering projects like a domain-specific peer programmer for insurance and reimagined industry workflows. At hyperexponential, impact comes from the challenges tackled and the discipline shown, not just job titles or tenure. The team values growth, resilience, and collaboration among peers who push each other to achieve their best work. About the Analytics Team The Analytics team designs and builds the data systems that help insurers turn complex datasets into actionable insights. Their work enables underwriters and actuaries to make informed decisions on significant risks by transforming raw portfolio data into practical intelligence. Role Overview: Senior Software Engineer (Kotlin) - Analytics Team This Senior Backend Engineer role focuses on architecting and developing the foundational data systems for next-generation insurance analytics. The position offers a greenfield environment, where responsibilities include designing distributed data solutions from the ground up, building scalable ingestion pipelines, and creating infrastructure that gives clients a data-driven edge. Engineers in this role work on sophisticated technical challenges and collaborate closely with experienced product and engineering colleagues, directly impacting business outcomes. Location London

Apr 17, 2026
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companyLendable logo
Full-time|On-site|London

About LendableLendable is committed to revolutionizing the way individuals access credit and save money. We are proud to be recognized as one of the leading fintech companies globally, and our journey has just begun:We are among the newest unicorns in the UK with a dynamic team of over 700 professionals.We rank among the fastest-growing tech companies in the UK.We have been profitable since 2017.Our growth is supported by top investors such as Balderton Capital and Goldman Sachs.Our customers love us, with a stellar rating of 4.9 across thousands of reviews on Trustpilot.We have successfully rebuilt the Big Three consumer finance products from the ground up: loans, credit cards, and car finance. Our aim is to get funds into our customers' hands within minutes, not days.As we continue our rapid expansion, we are focused on tapping into the two largest Western markets (the UK and the US) where trillions of dollars in financial products are still managed by large banks with outdated systems and cumbersome processes.Why You Should Join UsOwn Your Impact: You'll be empowered to make decisions that significantly influence the direction and success of Lendable from your very first day.Collaborate with Exceptional Talent: Work alongside a team of resourceful individuals who are dedicated to solving problems and innovating beyond the status quo.Develop Cutting-Edge Technology: Build top-tier technology in-house, leveraging new data sources, machine learning, and AI to facilitate efficient solutions.About the RoleIn our quest for a diverse team, we are excited to welcome a Staff/Lead Kotlin Engineer. This role provides a unique opportunity to introduce fresh perspectives and expertise to our design discussions, influencing how we tackle complex engineering challenges as we continue to grow. Our tech team, consisting of approximately 80 skilled professionals, is dedicated to transforming finance through a next-generation lending platform, advanced credit card solutions, and innovative auto-finance products.

Dec 17, 2025
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companyLendable logo
Full-time|On-site|London

About LendableLendable is dedicated to revolutionizing access to credit and savings through cutting-edge technology. As one of the UK's most promising fintech companies, we have established ourselves as a leader in the industry:Recognized as one of the UK’s newest unicorns with a diverse team exceeding 700 professionals.Ranked among the fastest-growing tech companies in the UK.Achieved profitability since 2017.Supported by prominent investors including Balderton Capital and Goldman Sachs.Celebrated by customers with exceptional reviews (4.9 from thousands on Trustpilot).We have successfully reimagined the Big Three consumer finance products: loans, credit cards, and car finance, enabling our customers to access funds in minutes rather than days.Our growth trajectory is ambitious as we target the UK and US markets, where traditional banks still rely on outdated systems and cumbersome processes.Why Join Us?Embrace Ownership: Make impactful decisions that shape the success of Lendable from day one.Collaborate with a Talented Team: Work within small, agile teams of innovative thinkers who prioritize problem-solving.Develop Cutting-Edge Technology: Utilize new data sources, machine learning, and AI to enhance our operational efficiency.About the RoleAs part of our commitment to diversifying our team, we are excited to welcome a Lead Kotlin Engineer. This role will empower you to contribute your unique insights and skills to our engineering discussions, ultimately helping us deliver sophisticated solutions to complex challenges. Join a tech team of approximately 80 skilled professionals who have transformed finance by creating a next-generation lending platform, credit card, and auto-finance products.

Dec 18, 2025
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companyWise logo
Full-time|On-site|London

Role Overview Wise is looking for a Senior Software Engineer II focused on Investments to help design and build Java applications. This position is based in London and centers on projects that support and improve Wise's investment strategies. What You Will Do Develop and maintain Java-based applications for the Investments team Work closely with engineers and stakeholders to deliver features and improvements Contribute to projects that directly impact Wise's investment products and processes Collaboration This role works within a collaborative team, sharing ideas and solutions to solve complex problems and deliver reliable software.

Apr 14, 2026
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companyCapco logo
Full-time|On-site|UK - London

Join Capco as a Senior Backend Engineer specializing in Java and play a pivotal role in designing and implementing robust backend solutions that drive our innovative projects. You will collaborate with cross-functional teams to deliver high-quality software that meets our clients' needs. This is an exciting opportunity for seasoned professionals looking to make a significant impact in a dynamic environment.

Mar 20, 2026
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companyhyperexponential logo
Full-time|On-site|London

Join our dynamic team at hyperexponential as a Full Stack Engineer, where you will be instrumental in developing innovative software solutions using Kotlin and React. This role involves collaborating with cross-functional teams to design, implement, and maintain high-quality web applications that meet our clients' needs. You will have the opportunity to work on exciting projects that push the boundaries of technology while fostering your professional growth.

Apr 8, 2026
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companyWise logo
Full-time|On-site|London

Join our dynamic team at Wise as a Senior Software Engineer I focused on Investments, where you will leverage your expertise in Java to drive innovative solutions. You will collaborate with cross-functional teams to enhance our investment platform, ensuring scalability, performance, and security. Your contributions will directly impact our mission to make money transfers and investments seamless and accessible for everyone.

Apr 14, 2026
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companyWise logo
Full-time|On-site|London

Role Overview Wise is looking for a Senior Software Engineer to focus on Global KYC (Know Your Customer) and Onboarding systems. This position is based in London and centers on building and improving the software that supports customer verification and onboarding. What You Will Do Design and implement software solutions for KYC and onboarding using Java. Work with cross-functional teams to deliver features that support regulatory compliance and smooth onboarding for customers. Contribute to systems that help Wise meet regulatory standards while keeping customer experience front and center. About Wise Wise is a financial technology company focused on making money movement and financial services easier and more transparent for customers worldwide.

Apr 16, 2026
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companyQurious Associates Limited logo
Senior Java Developer

Qurious Associates Limited

Full-time|On-site|City of London

We are seeking a highly skilled Senior Java Developer to join our dynamic team at Qurious Associates Limited. In this role, you will leverage your expertise in Java development to design, implement, and maintain robust applications that meet the needs of our clients. You will collaborate with cross-functional teams to deliver high-quality software solutions using modern development practices.

Sep 18, 2019
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companyWise logo
Full-time|On-site|London

Join our dynamic team at Wise as a Senior Software Engineer II specializing in Treasury and Liquidity solutions. In this role, you will leverage your expertise in Java to develop innovative software that enhances our financial services. Collaborate with cross-functional teams to deliver high-quality projects that directly impact our global operations and customer experience.

Nov 14, 2025
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companydev2 logo
Full-time|On-site|London

We are seeking a seasoned Senior Java Developer/Architect to join our dynamic team at dev2 in London. In this pivotal role, you will leverage your extensive experience in Java development and architectural design to lead innovative projects and drive technical excellence.The ideal candidate will possess a strong background in software engineering principles and practices, with a proven track record of designing scalable and robust systems. You will collaborate closely with cross-functional teams to define technical requirements and implement best practices in software development.

Dec 10, 2023
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companyWise logo
Full-time|On-site|London

About the Contacts Team Role Wise is looking for a Senior Software Engineer II to join the Contacts Team in London. This position focuses on building and improving Java-based applications that support the company’s core products. What You Will Do Work closely with engineers, product managers, and other stakeholders to design and implement software solutions. Develop and maintain high-performance Java applications that respond efficiently to front-end requests. Promote best practices in code quality, testing, and agile development within the team. Who We’re Looking For Significant experience with Java in a production environment. Comfort working with cross-functional teams. Strong interest in building reliable, scalable systems.

Apr 14, 2026
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companyWise logo
Full-time|On-site|London

Join Wise as a Senior Software Engineer I, where you will play a crucial role in developing and enhancing our Acquiring Platform. As a backend engineer specializing in Java, you will collaborate with cross-functional teams to create reliable, scalable, and innovative software solutions that will help us deliver exceptional payment experiences to our users.

Apr 7, 2026
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companyAlphaSights logo
Full-time|Remote|London, Remote

The Role: We are seeking exceptionally talented and motivated software engineers who take pride in their craft to join our Engineering team based in London. Successful candidates will become an integral part of a cross-functional team comprising product managers and designers, collaborating closely with the entire organization to produce effective code that addresses real-world challenges for both internal and external clients. You will have ownership of the issues that your team tackles, maintaining a high standard of quality in all releases while working within a top-performing international development environment. If you are passionate about solving problems with code and aspire to work alongside exceptional colleagues in a high-achieving atmosphere, this opportunity is perfect for you. What You Will Do: Design Solutions: Identify optimal technical solutions to business challenges, contributing to an architectural vision aimed at establishing the world's leading research platform. Ship Working Code: Our primary tech stack includes React for frontend development and Kotlin microservices with Postgres for backend, alongside some legacy services in Ruby on Rails. We maintain a proactive stance on evaluating new technologies that could enhance our stack. Deploy and Iterate: We frequently deploy to our customers, utilizing CircleCI and Spinnaker for CI/CD, and rapidly gather feedback to guide our next iterations. Build Your Competency: You will quickly learn by developing market-leading technology alongside experienced colleagues in a high-performance environment. Engineers have access to our L&D budget for the accelerated development of specific technical skills. Maintenance and Troubleshooting: Vigilantly monitor our services, identifying errors before they impact users, diagnosing root causes, and deploying effective fixes.

Feb 10, 2026
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companyAlphaSights logo
Full-time|Remote|London

The Role:We are on the lookout for exceptionally skilled and motivated software engineers who take great pride in their craft to join our dynamic Engineering team in London. The successful candidates will collaborate within a cross-functional team that includes product managers and designers, working closely with various departments to deliver high-quality code that addresses real-world challenges for both our internal and external clients. You will take responsibility for the services managed by your team, ensuring their development aligns with AlphaSights' overarching engineering strategy while also mentoring junior engineers. If you have a fervent passion for coding and wish to collaborate with outstanding colleagues in a high-achieving environment, this position is perfect for you.What You’ll Do:Design Solutions: Craft the optimal technical solutions to meet business needs, contributing to an architectural vision that aspires to be the world's preeminent research platform.Ship Working Code: Our primary technology stack includes React for the frontend and Kotlin microservices with Postgres on the backend, along with some legacy services developed in Ruby on Rails. We are always exploring new technologies to enhance our stack.Deploy and Iterate: We frequently release updates to our customers, utilizing CircleCI and Spinnaker for CI/CD, and promptly gather feedback to inform our subsequent iterations.Build Your Competency: You will rapidly enhance your skills by developing industry-leading technology alongside seasoned professionals in a high-performance setting. Engineers can also leverage our learning and development budget to accelerate their technical skillset.Maintenance and Troubleshooting: Vigilantly monitor our services, addressing issues before they impact users, diagnosing root causes, and implementing fixes.

Feb 10, 2026
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companyMinderacraft logo
Full-time|On-site|London, England, United Kingdom

We are seeking a talented and experienced Senior Java Developer to join our dynamic team at Minderacraft. As a key member of our development team, you will be responsible for designing, developing, and implementing high-quality Java applications that meet the needs of our clients. You will work closely with cross-functional teams to deliver innovative solutions that drive business success.

Apr 8, 2026

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