Senior Backend Engineer at Uncapped | Remote - London, UK

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.).

Join Aircall, a leading unicorn in the customer communications sector, revolutionizing the way businesses connect with their customers. Our AI-powered platform, trusted by over 22,000 companies globally, integrates voice, SMS, WhatsApp, and AI into a single cohesive workspace, enhancing revenue generation, expediting issue resolution, and empowering customer-facing teams.At Aircall, we believe in working smarter, not harder. Our AI Voice Agent automates routine calls, AI Assist simplifies post-call tasks, and AI Assist Pro offers real-time support, enabling teams to perform at their best. This innovation leads to increased revenue, quicker resolutions, and scalable teams.Headquartered in Paris, with a robust presence in North America centered in Seattle, Aircall has teams across various cities including Madrid, London, Berlin, San Francisco, New York City, Sydney, and Mexico City. We have crafted a beloved product and a rapidly growing business, supported by top-tier investors and driven by swift AI advancements across our offerings.At Aircall, you will become part of a dynamic and ambitious organization, where product excellence and execution are paramount. We prioritize swift decision-making, visible impact, and genuine growth.Our Work Culture: We are dedicated to our customers, rely on data-driven insights, and are focused on delivering impactful results. We value responsibility, continuous learning, and thoughtful speed. If you thrive in a collaborative, fast-paced environment where trust and impact are essential, you'll fit right in.We are seeking a motivated and passionate Senior Software Engineer to join our expanding engineering team and contribute to our innovative projects.In this role, you will be responsible for the design, development, deployment, and operation of critical features that enhance customer satisfaction. You will focus on operational excellence, metrics, observability, and best practices while mentoring your peers within the engineering team.With a commitment to quality, excellence, and agility, you will help elevate our delivery processes. Utilizing a NodeJS and Typescript back-end stack hosted on AWS, you will ensure that our solutions meet the highest standards.

Join Aircall, a rapidly growing unicorn and AI-driven customer communications platform utilized by over 22,000 companies globally. Our innovative approach integrates voice, SMS, WhatsApp, and AI into a cohesive workspace, revolutionizing customer interactions.At Aircall, our mission is simple: empower teams to work smarter, not harder. Our AI capabilities, including the AI Voice Agent for automating routine calls and AI Assist for streamlining post-call tasks, ensure that our customers achieve increased revenue and quicker resolutions.With headquarters in Paris and a strong presence across North America, including Seattle, we boast teams in major cities such as London, Madrid, Berlin, San Francisco, New York City, Sydney, and Mexico City. Supported by top-tier investors, we are pushing the boundaries of AI innovation across our product lines and are committed to scaling effectively.Our Work Culture: At Aircall, we prioritize customer obsession, data-driven decision-making, and impactful outcomes. We value ownership, continuous learning, and thoughtful speed. If you thrive in a collaborative and dynamic environment where trust and impact are paramount, you'll fit right in.About the Position: We are on the lookout for a Database Engineer with a platform-oriented mindset to be part of our Infrastructure department. This role transcends conventional database management; you will be a force multiplier, focusing on reliability and scalability.Your primary goal will be to translate your extensive database knowledge into intuitive tools, modules, and platforms that simplify database management and observability for our product engineers. You will help create the “Golden Paths” that enable developers to efficiently set up, scale, and monitor databases autonomously.

Join Aircall, a leading unicorn in the realm of AI-driven customer communications. Serving over 22,000 businesses globally, we are revolutionizing how customer interactions occur by integrating voice, SMS, WhatsApp, and AI into a unified workspace.Our approach is simple yet profound: we empower teams to work smarter. With innovations like our AI Voice Agent automating routine calls, AI Assist making post-call tasks efficient, and AI Assist Pro offering real-time support, we are driving higher revenues and enabling faster resolutions, allowing teams to scale confidently.Based in Paris, our European headquarters, we also have a strong presence in North America with our Seattle office, alongside teams located in Madrid, Berlin, San Francisco, New York City, Sydney, and Mexico City. Our product is beloved by customers and our business is rapidly expanding, supported by top-tier investors and propelled by swift AI advancements.At Aircall, you will be part of a dynamic, ambitious, and product-focused organization. We prioritize rapid decision-making, tangible results, and real growth, fostering a culture where every team member can make a significant impact.Our Work Culture: We are deeply customer-focused, data-oriented, and committed to achieving meaningful results. Emphasis is placed on ownership, continuous learning, and thoughtful execution. If you thrive in a collaborative and fast-paced environment where trust and impact are paramount, you will find your place with us.As an Infrastructure Engineer, your primary responsibility will be the management and operation of our AWS Cloud Infrastructure. Collaboration with peers and business teams is essential, and having hands-on experience with AWS is a prerequisite.

Join Aircall, a leading unicorn in the realm of AI-powered customer communications, where over 22,000 businesses globally harness our platform to enhance revenue, expedite issue resolution, and scale their customer-facing teams. We are transforming the communication landscape by integrating voice, SMS, WhatsApp, and AI into a cohesive workspace.Our growth is driven by a core philosophy: enable teams to work smarter, not harder. With our AI Voice Agent automating routine calls, AI Assist optimizing post-call tasks, and AI Assist Pro providing real-time insights, our solutions empower teams to achieve higher revenue and faster resolutions.Headquartered in Paris, with a robust presence in North America through our Seattle office, and teams across cities like Madrid, London, Berlin, San Francisco, New York City, Sydney, and Mexico City, Aircall has created a product that delights customers and a business model that scales rapidly, fueled by our commitment to innovation in AI across various product lines.At Aircall, you will be part of an ambitious, product-focused, and execution-driven team. We value visible impact, swift decision-making, and genuine growth.Our Work Culture: We are dedicated to understanding our customers, leveraging data meticulously, and striving for substantial outcomes. We champion ownership, continuous learning, and thoughtful execution. If you excel in a collaborative and dynamic environment where trust and impact are paramount, you will thrive here.We seek a passionate and dedicated Senior Data Engineer to become an integral part of our expanding Engineering Team. In this pivotal role, you will oversee our analytics and event platform stack.As a vital member of the Analytics & Data Platform team, your contributions will serve over 22,000 customers worldwide. Your efforts will unlock valuable data insights, enabling our clients to make informed decisions through real-time analytics, monitoring, and detailed reports.

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.

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.

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 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!

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 Aircall is looking for a Security Engineer focused on Product Security to help protect our products and platform. This role is based in our London office. What You Will Do Work with teams across engineering, product, and other functions to spot vulnerabilities and address them early in the development process. Implement security measures that fit our product development lifecycle. Lead security initiatives that strengthen customer trust and protect sensitive data. Support efforts to keep our security standards high as our platform evolves. Impact This role directly shapes the security of Aircall’s products and the safety of customer data. The work supports our commitment to strong security practices and helps maintain trust with our users.

Join Apron as a Senior Software Engineer - BackendAt Apron, our mission is to empower small and medium-sized businesses by ensuring their success. We understand that cash flow challenges often stem from the pressure of demand payments on business owners, which can hinder their ability to meet these obligations.We are bridging this gap by modernizing and simplifying the payment processing experience: from capturing invoices to issuing expense cards, and facilitating transactions—all in one seamless platform.As a rapidly growing company, we have expanded our team to approximately 100 talented individuals across the UK, Germany, Spain, and beyond. Backed by notable investors such as Index Ventures, Bessemer Venture Partners, Zinal Grow, and Tony Fadell, we have successfully raised $50 million to fuel our growth.Our Engineering CultureAt Apron, engineers play a pivotal role in our operations. Here's what you can expect:Customer-Centric Development: We utilize cutting-edge technology to create products that genuinely enhance our customers' lives.Ownership of Projects: From planning to execution, we take full responsibility for our work.Complex Financial Challenges: We embrace the intricacies of finance, navigating complex business logic and ensuring every detail is accounted for. Precision and attention to detail are paramount in creating a reliable product.Pride in Our Code: We prioritize building fast, secure, and scalable code that can grow with us.Integration of AI Tools: We leverage the best available technologies to ensure our product is genuinely beneficial.Your ResponsibilitiesWe are looking to expand our Card team, which has just launched. As a Senior Software Engineer, you will:Collaborate Across Teams: Work closely with Frontend Engineers, Product Managers, and Designers to develop innovative features.Design Robust Systems: Develop core financial integrations to ensure the security of customer funds and expedite transactions.Drive Innovation: Share your expertise with the team to foster innovation and proactively suggest improvements.

About Aircall Aircall builds an AI-powered customer communications platform used by more than 22,000 companies worldwide. Our workspace brings together voice, SMS, WhatsApp, and AI to help teams boost revenue, resolve issues faster, and scale customer-facing operations. With headquarters in Paris and offices in London, Seattle, Madrid, Berlin, San Francisco, New York City, Sydney, and Mexico City, Aircall continues to grow quickly. Our platform is trusted by customers and backed by leading investors. We’re committed to advancing AI across our product lines. How We Work At Aircall, we focus on customer satisfaction, data-driven decisions, and meaningful results. We value ownership, continuous learning, and thoughtful pacing. Collaboration and trust shape our culture. People who thrive here enjoy making an impact in a supportive, team-oriented environment. Role Overview: AI Productivity Engineer (London Office) The Engineering Productivity (EngProd) team is looking for an AI Productivity Engineer. This role centers on building and deploying AI-powered tools to streamline engineering workflows. The work involves reducing friction, automating repetitive tasks, and weaving intelligence into daily engineering activities. This is not a research or customer-facing position. Instead, the focus is on delivering practical, production-ready AI solutions that engineers rely on every day. The impact is direct: the tools and systems built will be used internally to improve engineering efficiency. This position suits someone who enjoys creating real systems that people depend on, with an emphasis on lasting value rather than chasing trends.

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.

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 global player in AI-enhanced due diligence and risk intelligence. The year 2024 marked a pivotal moment for us, as we secured a $10 million Series A funding, achieved accolades in the Chartis RiskTech100® and Everest Group’s Leading 50™, and broadened our product offerings and market reach.Looking ahead to 2025, we are poised for even greater achievements. As organizations face mounting compliance demands and heightened reputational risks, they are increasingly seeking intelligent, efficient solutions—turning to Xapien for rapid, reliable insights that transform days of manual research into actionable intelligence in mere minutes.Our Growth JourneyWe are proud to serve customers across a multitude of industries, with notable expansion in wealth management, financial services, and supply chain onboarding. Our reach extends beyond the UK, with a growing clientele in the Middle East, Asia, and Oceania.Why Join Us Now?This role offers a unique opportunity to influence the future of the due diligence industry with a leading product that global organizations trust. Regardless of your background—be it marketing, communications, sales, or finance—you will play a vital role in driving growth, enhancing credibility, and connecting our product with an ever-evolving market landscape.As we scale rapidly, with increasing customer demand, product releases, and complex regulatory challenges, the stakes are higher than ever. Due diligence now demands instantaneous insights that are delivered effectively and impactfully. Your contributions will transcend traditional roles, as you will help shape strategies, refine processes, and elevate a brand that is setting new benchmarks for trust and transparency.For those passionate about learning, innovating, and making a significant impact, now is the perfect time to join Xapien.The PositionWe are in search of a Senior Backend Engineer to become a pivotal member of our engineering team, tackling some of our most complex technical challenges. You will be responsible for owning critical components of our platform’s architecture, driving innovation and quality in our backend systems.

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.