Contract Senior Java / Kotlin Engineer

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.

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.

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.

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.

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

Join Our Team as a Full Stack Java/Python Engineer!We are seeking a talented Full Stack Java/Python Engineer for an exciting 6-month contract starting as soon as possible.Work Schedule: 2 days a week in our London office.Key Responsibilities:Leverage your extensive commercial software development experience, demonstrating a strong command of Java and Spring Boot, while crafting robust end-to-end full stack applications encompassing frontend, backend, and APIs.Utilize your proficiency in Python for agent services, orchestration, and LLM integrations.Implement modern frontend frameworks, such as React or Typescript, to deliver high-quality user experiences.Engage with cloud technologies and containerization (AWS/GCP/Azure, Docker), with a preference for candidates with Kubernetes experience.Handle data and retrieval mechanisms, including Postgres/NoSQL, vector databases, embeddings, and semantic search.Collaborate effectively in an agile development environment.Communicate technical challenges and influence decisions within the team, ensuring stakeholder satisfaction.Exhibit a strong understanding of engineering best practices, such as TDD, SOLID principles, and XP methodologies.Our Commitment to Diversity:We are proud to be an equal opportunity employer and encourage applications from all qualified candidates. We actively promote inclusivity and welcome applications from women, ethnic minorities, and individuals with disabilities. We consider all flexible working arrangements, tailored to the needs of the role, and strive to accommodate reasonable adjustments.

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.

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.

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.

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.

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.

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.

Location: Hybrid in central London (3 days onsite per week) Contract Type: Contract Role overview minderacraft seeks a Senior Python Engineer to support the scaling and enhancement of the AI Stylist, a live AI-powered recommendation system for web and mobile users. As the product enters a rapid growth phase, the team faces a substantial backlog of features and improvements. This contract role sits within the Recommendations team, focusing on integrating advanced AI capabilities and blending conversational interfaces with recommendation logic. The work directly affects the quality, relevance, and reliability of a customer-facing system in production. What you will do Develop and refine AI-driven services using Python Design and implement evaluation frameworks for large language model (LLM) systems Enhance output quality through structured evaluations, beyond just code changes Apply techniques such as LLM-as-a-Judge to assess recommendations and responses Manage and iterate on non-deterministic systems, using real-world performance data Integrate AI features into a broader platform and API ecosystem Contribute to production readiness, focusing on reliability, observability, and performance metrics Collaborate closely with data scientists on prompt engineering, model selection, and evaluation strategies Requirements Core experience Strong Python engineering background in production environments Experience building AI-enabled applications, especially recommendation or conversational systems Direct experience with evaluation frameworks for LLM or AI systems Understanding of how AI systems differ from traditional deterministic software Ability to design effective evaluations and drive ongoing system improvement Track record of collaborating in cross-functional teams with engineering, data, and product stakeholders Nice to have Familiarity with Azure AI services or similar platforms Knowledge of OpenAI or comparable SDKs Exposure to infrastructure and distributed systems Experience with tools like Terraform or Kafka Benefits Competitive day rate

Position: Contract Technical Lead - Fullstack (Java/React)Compensation: £500 per dayContract Length: 6 monthsExpected Start: Early AprilWork Arrangement: On-site 2 days per week at our City of London officeAbout Us:AND Digital is a progressive technology firm committed to expediting digital transformation and bridging the digital skills gap. Since our inception in 2014, we have partnered with organizations to create superior digital products and cultivate robust digital teams.We strive to make a significant impact in everything we do, focusing on building strong, collaborative relationships with our clients through our regional offices, known as 'Clubs', ensuring they are supported by a dedicated team close to them.Our unique model has propelled our success, reflected in our impressive organic growth since 2014. Currently, we boast a workforce of over 1,300 professionals across Clubs in the UK, Europe, and the USA, with plans for global expansion in the coming years.Join us in our mission to close the digital skills gap across the globe.Your Role:We are on the lookout for a hands-on Technical Lead, who will also serve as an Architect and Engineering Leader, to spearhead a complex modernization initiative.Your Leadership & Influence:Technology Engineering Leadership: Demonstrated success in leading intricate software engineering projects, with a talent for converting enterprise-scale challenges into opportunities.Stakeholder Management: Proficient in client-facing delivery, with the ability to translate complex architectural solutions into substantial business value.Hands-on Approach: Comfortable leading projects from the front, with a focus on technical execution and a readiness to assist teams in achieving their goals.Your Strategic Mindset:Champion of Quality: You take pride in your work, advocating for quality assurance, security, and performance to ensure our client solutions are durable and trusted.Industry Knowledge: Committed to continual learning, staying abreast of industry standards, emerging engineering patterns, and best practices.Your Technical Expertise:Leading by example, you maintain the technical acumen necessary to oversee projects from architecture through to production and operational support.Engineering Proficiency: Full-stack experience in multiple programming languages, particularly Java and React, with a comprehensive understanding of engineering methodologies including pair programming, TDD, security by design, and observability.

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.

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.

At Mindera, we are seeking a highly skilled Senior Software Deployment Engineer to take charge of the delivery, configuration, testing, and deployment of applications and retail device solutions in complex, large-scale environments. This pivotal role allows you to influence deployment strategies, spearhead automation efforts, enhance system reliability, and mentor fellow engineers.Your collaboration with product, platform, and engineering teams will be crucial in ensuring the seamless, secure, and high-quality release of applications that reach thousands of customers. Please note that this is a hybrid role, requiring you to be onsite in Bracknell three days a week.

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.

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.

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.