Clicking Apply Now takes you to AutoApply where you can tailor your resume and apply.
Experience Level
Senior
Qualifications
Ideal Candidates Will Have: A minimum English proficiency of C1.At least 8 years of relevant experience. A keen interest in mastering Java and Spring intricacies. Strong background in testing methodologies. A collaborative spirit with an appreciation for autonomy. Willingness to visit the office in Warsaw twice a week.
About the job
Join Our Vision! At Uncapped, we empower ambitious founders to scale their businesses through innovative financing solutions. We champion curiosity, continuous improvement, and impactful problem-solving.
Technologies You Will Work With
Core Technologies: Java 21, Spring Boot/Cloud 3.3
Infrastructure: GCP, Kubernetes
Database Technologies: SQL/NoSQL (chosen per use case)
Your Contributions
Design and develop secure microservices tailored for financial systems.
Take ownership of services throughout their lifecycle (design → deploy → monitor).
Enhance code quality through automation and modern practices (CI/CD pipelines in under 15 minutes).
Stay at the forefront of technology and share your insights with the team.
Excel within a Kanban-driven team that values effective communication over meetings.
Why Choose Uncapped?
Be part of a fintech solution trusted by thousands of businesses.
Contribute to a product that you can help shape and significantly impact.
Supported by leading venture capitalists like LakeStar and SeedCamp.
About Uncapped
Founded in 2019, Uncapped addresses the funding gaps faced by startups, providing innovative financing solutions that foster growth and success.
About XapienAt Xapien, we redefine the landscape of due diligence by empowering businesses with essential insights about their suppliers, investors, partners, and third parties. Our innovative approach integrates speed, scale, and precision through advanced AI technology.Since our inception in 2018, we have evolved from a deep-tech startup into a significant…
Join Our Dynamic Team at XapienAt Xapien, we empower businesses to truly understand their connections with suppliers, investors, partners, and third parties. Our innovative approach merges speed, scale, and precision, utilizing advanced AI technology.Since our inception in 2018, we've evolved from a deep-tech startup to a key player in AI-driven due diligence and risk intelligence. The year 2024 marked a significant milestone, with the successful closure of a $10M Series A funding round and accolades in the Chartis RiskTech100® and Everest Group’s Leading 50™. Our expansion has led to a broader product range, new market entries, and an expanding customer base.Our Growth TrajectoryWe're witnessing accelerated demand across various industries, especially in wealth management, financial services, and supply chain onboarding, extending our reach beyond the UK to customers in the Middle East, Asia, and Oceania.Why Now is the Perfect Time to Join UsThis position is not just another role; it’s a chance to influence the future of the due diligence sector with a market-leading product that organizations worldwide trust. Whether your expertise lies in marketing, communications, sales, or finance, your contributions will be vital in driving growth, enhancing credibility, and connecting our product with a swiftly changing market.As we scale rapidly, with an increasing number of customers and product releases, we face larger regulatory and market challenges. The expectation for real-time insights in due diligence is higher than ever. Your role will go beyond routine tasks; you will be shaping strategy, refining processes, and positioning a brand that is redefining trust and transparency.If you're passionate about learning, innovating, and making a meaningful impact, now is the time to join Xapien.The RoleWe are seeking a skilled Senior Backend Engineer to take on a pivotal technical leadership role within our engineering team. You will tackle our most complex technical challenges, take ownership of critical components within our platform’s architecture, and help guide our technical direction to ensure we continue to stay ahead in the industry.
About XapienAt Xapien, we believe that understanding your business relationships is crucial. We are revolutionizing the way organizations assess their suppliers, investors, partners, and other third parties by leveraging advanced AI technologies that deliver speed, scale, and precision.Since our inception in 2018, we have evolved from a deep-tech startup into a globally recognized leader in AI-powered due diligence and risk intelligence. In 2024, we achieved significant milestones, including a $10M Series A funding, being listed in the Chartis RiskTech100®, and the Everest Group’s Leading 50™. Our product offerings and customer base have expanded remarkably.In 2025, we witnessed unprecedented growth: as regulatory pressures and reputational risks escalate, organizations globally are turning to Xapien for innovative, efficient solutions. Our clientele spans across various sectors, including prestigious law firms, financial institutions, educational establishments, and nonprofits, all seeking to convert lengthy research processes into valuable insights in mere minutes.Why Join Us?This is more than just a job; it’s a chance to influence the future of the due diligence sector with a premier product that is trusted by organizations worldwide. Regardless of your background—be it marketing, communications, sales, or finance—you will play an essential role in our growth story, enhancing our credibility, and connecting our solution with a rapidly changing market landscape.As we continue to scale, with a growing customer base and increasing regulatory challenges, the demand for real-time insights has never been higher. You will have the opportunity to shape strategies, streamline processes, and contribute to a brand that is redefining trust and transparency in the industry.If you are passionate about learning, innovating, and making impactful contributions, now is the perfect time to join Xapien.
About XapienAt Xapien, we believe that understanding who you're truly engaging with—be it suppliers, investors, partners, or third parties—is crucial for any business. We are revolutionizing this process through the integration of advanced AI technology, achieving unmatched speed, scale, and accuracy.Since our inception in 2018 as a deep-tech startup, we have rapidly evolved into a global leader in AI-powered due diligence and risk intelligence solutions. The year 2024 marked a significant milestone for us, highlighted by a successful $10M Series A funding round, recognition in the Chartis RiskTech100® and Everest Group’s Leading 50™, and an expansion of our product offerings, markets, and customer base.2025 has brought even greater opportunities: With increasing regulatory demands and heightened compliance pressures, organizations around the globe are seeking smarter, quicker ways to operate, and Xapien is their go-to solution. From prestigious law firms and private banks to academic institutions and nonprofit organizations, our clients depend on us to transform lengthy manual research into reliable insights delivered in mere minutes.Our Growth JourneyWe have attracted a diverse clientele across various sectors, particularly witnessing growth in wealth management, financial services, and supply chain onboarding. Our demand is surging beyond the UK, with new customers emerging from the Middle East, Asia, and Oceania.Why Join Us Now?This position isn’t just another job; it’s a chance to redefine the future of the due diligence industry with a leading product trusted globally. Whether your expertise lies in marketing, communications, sales, or finance, your contributions will be vital in driving growth, establishing credibility, and aligning our product with the dynamic market landscape.As we scale rapidly, we face increasing customer demands, additional product releases, and significant regulatory challenges. The standard for due diligence is evolving, requiring real-time insights delivered with efficiency and impact. You will not only execute campaigns or manage figures but also influence strategic direction, optimize processes, and enhance a brand that is setting new benchmarks for trust and transparency.For those passionate about learning, innovating, and making a meaningful impact, now is the perfect time to join Xapien.Role OverviewAs we approach our Series B funding, we are seeking a Head of Engineering to establish and lead a high-performing, scalable engineering team. You will report directly to Shaun O’Mahony, Co-Founder and...
About Xapien Xapien helps organizations understand their networks, suppliers, investors, and partners, through AI-driven due diligence and risk intelligence. Founded in 2018, the company has grown from a deep-tech startup to a recognized name in global risk technology. In 2024, Xapien secured $10 million in Series A funding, earned recognition in the Chartis RiskTech100® and Everest Group’s Leading 50™, and expanded both its product line and market reach. Clients include global law firms and non-profits who depend on Xapien for real-time, trusted insights that support operational efficiency. As demand for intelligent operational solutions grows, Xapien continues to set standards for trust and transparency in the industry. Why Join Xapien? Working at Xapien means shaping the future of due diligence technology. Every role, engineering, marketing, finance, contributes directly to the company’s growth and reputation. The team is growing quickly, and each member faces the challenge of meeting high expectations for speed and accuracy in a competitive landscape. Xapien values innovative thinking and welcomes those ready to help drive success. Role Overview: Senior DevOps Engineer The Senior DevOps Engineer will take the lead on Xapien’s Continuous Integration and Continuous Deployment (CI/CD) platform. This role focuses on making software delivery processes efficient and secure, while supporting a positive experience for the development team. The position is based in Xapien’s London office.
About UsXapien is revolutionizing the way businesses understand their connections, whether it’s with suppliers, investors, partners, or third parties. We harness the power of advanced AI to provide organizations with unmatched speed, scale, and accuracy in their due diligence processes.Since our inception in 2018, we've transformed from a deep-tech startup into a global leader in AI-driven risk intelligence and due diligence solutions. In 2024, we celebrated a milestone achievement by securing $10M in Series A funding, receiving accolades in the Chartis RiskTech100® and Everest Group’s Leading 50™, and broadening our product offerings, markets, and customer base.2025 has brought even greater opportunities: With increasing compliance demands, emerging regulations, and heightened reputation risks, organizations worldwide are seeking innovative and efficient solutions, placing their trust in Xapien. From renowned law firms and financial institutions to educational and non-profit organizations, our clients rely on us to transform cumbersome manual research into actionable insights delivered within moments.Our growth trajectory:As we expand our reach beyond the UK, we are witnessing a surge in demand across continents, particularly in the Middle East, Asia, and Oceania, with significant growth in sectors such as wealth management, financial services, and supply chain onboarding.Why Join Us Now?This role presents a unique chance to influence the future of the due diligence industry with our leading-edge product, trusted by organizations globally. Regardless of your background—whether in marketing, sales, finance, or communications—you’ll be pivotal in driving growth, establishing credibility, and connecting our product to a dynamic market landscape.We are rapidly scaling, facing new regulatory challenges, and responding to heightened customer expectations. At Xapien, due diligence now embodies real-time insights delivered efficiently and effectively. You will not just execute tasks; you will influence strategies, optimize procedures, and contribute to a brand that is redefining standards for trust and transparency.If you are passionate about learning, innovating, and making a meaningful impact, now is the perfect time to join Xapien.The RoleWe are on the lookout for a detail-oriented Applied Research Engineer to assist in the development of the next generation of algorithms at the core of our systems. With our product experiencing rapid growth, your contributions will be crucial in shaping our solutions.
Join Aircall, a revolutionary unicorn in the AI-powered customer communications sphere, trusted by over 22,000 companies globally to enhance revenue, expedite issue resolution, and empower customer-facing teams. We are transforming the landscape of customer communications by integrating voice, SMS, WhatsApp, and AI into a unified workspace.Our growth is driven by a straightforward principle: to enable teams to work smarter, not harder. Our AI Voice Agent automates routine calls, while AI Assist simplifies post-call tasks, and AI Assist Pro provides real-time insights, allowing individuals to excel in their roles. This synergy results in increased revenue, quicker resolutions, and scalable teams.Headquartered in Paris, with a solid presence in North America anchored in Seattle, Aircall also has teams in vibrant cities such as Madrid, London, Berlin, San Francisco, New York City, Sydney, and Mexico City. Our product is beloved by customers, and we are rapidly scaling, supported by top-tier investors and continuous AI advancements across multiple product lines.At Aircall, you'll become part of a dynamic company. We are ambitious, focused on product development, and execution-oriented, with a clear impact, swift decision-making, and genuine growth opportunities.Our Work Culture at Aircall: We prioritize customer satisfaction, leverage data for decision-making, and are dedicated to delivering significant outcomes. We cherish ownership, continuous improvement, and thoughtful agility. If you thrive in a collaborative, fast-paced environment where trust and impact are essential, you will thrive here.Position Overview:As a Senior Backend Software Engineer, you will take charge of designing, developing, deploying, and maintaining essential features that enhance customer value on our voice platform.You will be expected to advocate for best practices, mentor team members, and contribute to the broader Engineering community as part of your daily responsibilities.Quality, excellence, and agility are at the core of our delivery process, and you will play a pivotal role in elevating these standards.Utilizing a diverse array of backend technologies tailored to specific needs, all hosted on AWS, we create resilient services that deliver added value on top of voice while fully integrating with our customers' critical business tools (CRM, Helpdesk, E-Commerce, etc.).
About 9fin9fin is a cutting-edge AI platform revolutionizing the global debt markets, which represent the largest asset class exceeding $145 trillion.The landscape of debt markets is extensive, global, and essential, yet it often relies on disjointed data, PDFs, and manual processes. 9fin transforms this outdated infrastructure by providing a unified platform that consolidates proprietary credit data, in-depth analysis, and efficient workflows across international markets.Currently, 9fin empowers over 300 prestigious institutions worldwide, including leading banks, asset managers, private equity firms, law firms, and consulting advisors. The company is experiencing rapid growth, particularly in the US, with exceptional retention rates driven by robust workflow adoption.We are at a pivotal moment. With a validated product-market fit and strong global demand, 9fin is propelling towards becoming the definitive platform for debt markets globally.What You'll Work OnAs a Senior Backend Engineer on our Structured Credit team, you will contribute to the development of our market-leading CLO product and assist in the launch of a new vertical.Our team is dedicated to making a significant impact, leveraging technology to create value for the business. While we have overarching business goals, we enjoy the autonomy to define our team objectives and determine our success metrics. We uphold accountability and proactive behaviors such as ownership.Lead projects within a cross-functional team by defining and designing systems, building proof of concepts, and delivering new service functionalities—including APIs, data processing, and automation—while collaborating with Product and Clients.Engage in backend development and engineering primarily on the services and web applications hosted on the 9fin platform.Play a crucial role within project teams as a senior individual contributor, conducting code reviews, mentoring fellow developers, and participating in early research and experimentation with new technologies to provide insights for new features and products.Continuously enhance the 9fin codebase by seizing opportunities to automate, refactor, and document processes when it has the most significant impact.Work across diverse web platforms involving complex financial data modeling, intricate access control logic, environmental data capture, integration of ML/AI prediction services, and data visualization.
About UsAt Xapien, we believe in empowering businesses with the insights they need to navigate their relationships with suppliers, investors, partners, and third parties. Our innovative approach blends speed, scalability, and precision through advanced AI technology.Since our inception in 2018, we have transformed from a deep-tech startup into a leading player in AI-driven due diligence and risk intelligence. Our journey reached a significant milestone in 2024 with the successful closure of a $10M Series A funding round, recognition in the Chartis RiskTech100®, and the Everest Group’s Leading 50™, alongside expanding our product offerings and customer base.Looking ahead to 2025, we are poised for even greater growth. With evolving regulations and increasing compliance demands, organizations worldwide are turning to us for smarter, quicker solutions. From prestigious law firms and private banks to educational institutions and nonprofits, our clients depend on Xapien to transform lengthy research processes into actionable insights delivered in minutes.Why Join Us?This is not just another job; it's your chance to influence the future of the due diligence landscape with a market-leading product that global organizations trust. Whether your expertise lies in marketing, communications, sales, or finance, you will play a vital role in driving growth, enhancing our credibility, and connecting our product with a rapidly changing market.As we scale, we face increasing customer demand, frequent product releases, and substantial regulatory challenges. The expectations for real-time insights are rising, and you will not only be executing campaigns or managing numbers but influencing strategy, optimizing processes, and positioning a brand that sets the benchmark for trust and transparency.If you are passionate about learning, innovating, and making a significant impact, now is the perfect time to join Xapien.The RoleWe are in search of an Engineering Manager to lead one of our dynamic engineering teams, overseeing a group of talented engineers dedicated to developing features that have a direct impact on our customers.
Full-time|Hybrid|London, England, United Kingdom (Hybrid)
Join commercetools as a Senior Backend Engineer, where you will play a pivotal role in shaping innovative backend solutions using TypeScript. Collaborate with cross-functional teams to create scalable and resilient microservices that empower our clients to deliver exceptional digital commerce experiences.
About the CompanyAffinidi is a pioneering technology firm focused on reimagining data ownership. We empower both businesses and individuals to take control of their data, providing a holistic approach to managing their digital identity while prioritizing privacy and security.Our innovative technology facilitates decentralized digital identity solutions, ensuring that everyone has the right to own and govern their data. We are dedicated to establishing a trustworthy ecosystem for digital credentials that allows secure data and service exchange across various sectors and borders. About the Role: We are seeking a solution-driven Senior Backend Engineer who possesses substantial expertise in Rust. The ideal candidate will have a track record of delivering robust backend solutions and is eager to contribute to our mission of transforming digital identity.
About UsAre you ready to embark on a thrilling challenge?At XYZ Reality, a dynamic and award-winning Series-A startup, we're on a rapid ascent toward our next funding milestone. Our vision is to revolutionize the construction sector by enhancing our platform's features, performance, and scalability.We thrive in a fast-paced, multi-disciplinary environment, engaging in various domains such as cloud development, electronics, embedded software/hardware, mechanical design/manufacturing, AI & computer vision, and data science—all contributing to our innovative BIM Platform.To propel this mission forward, we are in search of a Backend Engineer with extensive Node.js experience to assist in our transition from Java to Node.js and develop high-performance, scalable backend services. You will collaborate closely with our API development, client applications, and data pipeline teams to design and deliver robust, efficient solutions.Our office is situated in central London, just a short stroll from Angel Station.
We are seeking an experienced and passionate Senior Backend Engineer specializing in TypeScript to join our dynamic software engineering team at onrunning. In this pivotal role, you will lead the design and development of robust backend systems that power our innovative applications. You will collaborate closely with cross-functional teams to deliver high-quality solutions that meet the needs of our users. If you have a strong background in backend development, a love for building scalable systems, and a desire to drive technical excellence, we want to hear from you!
Full-time|Hybrid|Remote — London, England, United Kingdom
Join Our Vision! At Uncapped, we empower ambitious founders to scale their businesses through innovative financing solutions. We champion curiosity, continuous improvement, and impactful problem-solving.Technologies You Will Work With Core Technologies: Java 21, Spring Boot/Cloud 3.3Infrastructure: GCP, KubernetesDatabase Technologies: SQL/NoSQL (chosen per use case)Your Contributions Design and develop secure microservices tailored for financial systems.Take ownership of services throughout their lifecycle (design → deploy → monitor).Enhance code quality through automation and modern practices (CI/CD pipelines in under 15 minutes).Stay at the forefront of technology and share your insights with the team.Excel within a Kanban-driven team that values effective communication over meetings.Why Choose Uncapped?Be part of a fintech solution trusted by thousands of businesses.Contribute to a product that you can help shape and significantly impact.Supported by leading venture capitalists like LakeStar and SeedCamp.
Affinidi develops technology that helps people and organizations manage their data with greater control. The team designs digital identity tools that keep privacy and security at the forefront. Their work emphasizes decentralized approaches, aiming to make digital credentials both secure and accessible across industries and borders. Role overview The Senior Backend Engineer (Rust) position focuses on building and refining backend systems for privacy-first digital identity products. This London-based role plays a key part in supporting secure, reliable services that underpin Affinidi's core offerings. What you will do Develop and maintain backend services using Rust Create technical solutions that enhance efficiency and reliability Support the ongoing development of decentralized identity platforms Location London, England, United Kingdom
Role overview airapps is hiring a Backend Engineer for its London Metropolitan Area team. This role focuses on designing and building scalable server-side applications that support the company’s products and services. What you will do Work closely with colleagues across different functions to develop backend systems Contribute to the architecture and implementation of server-side features Help ensure backend solutions can scale and perform reliably Location This position is based in the London Metropolitan Area.
Transform the Future of Finance.At Light, we are revolutionizing the outdated ERP systems of the factory era with innovative software that feels dynamic and responsive. Our Smart Financial Platform empowers modern, global enterprises with automated accounting, instantaneous reporting, and financial processes that adapt to the pace of business.We're passionate about collaborating with our clients, delivering swiftly, and perfecting our craft. In a short span, Light has evolved from a concept to an essential operational tool for renowned companies such as Lovable, Legora, and Keyshot. Our users don’t just utilize Light—they genuinely enjoy the experience.As a pioneering team, we are establishing a new software category. We are looking for engineers who appreciate the intricacies of debits and credits, designers who prioritize reconciliation states, and operators who view finance as a product. If you are eager to modernize the financial landscape—one workflow at a time—you belong here.Supported by prestigious investors and guided by industry leaders, we are crafting products that define categories, allowing us to innovate boldly and take ownership of our results. Join us in our mission to make Light the global standard for next-generation financial solutions.Your Role as a Backend Engineer:Enhance our core Smart Financial Platform, enabling multinational corporations to streamline their accounting processes through AI and exceptional user experience.Maintain a strong focus on customer requirements while architecting robust and scalable technical solutions.Develop and optimize backend services, APIs, and infrastructure to support our high-performance frontend applications.
Join Our Team!At Plum, we are revolutionizing how people save and invest. Our mission is to empower individuals to grow their wealth for life, whether they are saving for their first home or enjoying retirement. Since our inception in 2016, over 2 million users across 10 European countries have saved more than £2 billion with our innovative automation and AI technology. We've been recognized with awards from esteemed organizations like Deloitte and Finder, reflecting our commitment to excellence.We are a passionate team of over 200 Plumsters working collaboratively across Europe, and we are eager to welcome more talented individuals to help us achieve our vision.Your RoleAs a Senior Backend Engineer at Plum, you will play a crucial role in shaping our technology and product offerings. We seek engineers who are not only technically adept but also understand the importance of delivering outstanding products to our customers.
At Spotify, we are on a mission to revolutionize the way creators and listeners engage with long-form storytelling through our Audiobooks initiative. Our objective is to create a seamless ecosystem for audiobook content, facilitating smooth transfers from publishers to listeners. This includes building the robust systems necessary for content ingestion, processing, and efficient delivery across our rapidly expanding global catalog. We are seeking a talented Senior Backend Engineer to join a dynamic and impactful team within the Audiobooks Pipeline sector. This team's primary responsibility is to design and scale systems that handle the ingestion, processing, and transformation of audiobook and eBook content, metadata, and royalties, ensuring that listeners receive the right content with utmost efficiency and quality. While this role encompasses full-stack responsibilities, the emphasis will be on backend and data-centric development. We are looking for an individual who thrives in uncertain environments, is passionate about learning, and is excited to tackle complex challenges across the tech stack.
Role overview Legal & General seeks a Senior Backend Engineer with strong Node.js skills to support the development and enhancement of backend systems for its products and services. This role is based in London and centers on building reliable, effective backend infrastructure. What you will do Develop and maintain backend components using Node.js Collaborate with engineering, product, and operations teams to deliver dependable solutions Address system performance and scalability as client requirements evolve
