26 Software Engineer Integration jobs in London

About Us Finalto is a global leader in liquidity provision and trading technology solutions, serving institutional and B2B clients across financial markets worldwide. With regulated entities in the UK, Singapore, Cyprus, Australia, and the UAE, and additional operational teams in Denmark and Bulgaria, we combine international reach with local expertise. Our business spans multi-asset liquidity, risk management, and cutting-edge trading platforms, supporting clients in achieving more e?icient and sustainable growth. At the core of our success is our commitment to innovation, operational excellence, and robust governance. As part of a global financial services group, Finalto combines the scale and stability of an established organisation with the agility of a fintech innovator. We are driven by collaboration, integrity, and performance. Joining Finalto means becoming part of a diverse and dynamic team where your contributions have real impact. We invest in our people,...

Do you enjoy building scalable products that empower compliance teams to track fund flows and uncover deeper insights in financial data? Are you excited to solve complex engineering challenges that improve speed, precision, and usability across investigative workflows? Elliptic is seeking a Software Engineering Lead to join our Investigations team . This is a unique opportunity to make a tangible impact at the intersection of cutting-edge technology and financial crime prevention. You’ll lead a team of talented product and data engineers dedicated to building powerful tools that help investigators worldwide uncover and stop illicit activity in the crypto space. The Impact You Will Have As Lead of the Investigations team, you will play a pivotal role in shaping the future of crypto investigations and how compliance teams track and prevent financial crime. Working closely with the product team, you’ll help define the technical direction of our product that’s quickly becoming...

We are looking for a Security Platform Engineering Lead to define, build and operate a portfolio of reusable security capabilities that can be consumed by engineering squads as part of our product delivery. This role will combine technical leadership with hands on engineering, ensuring that security controls are delivered as code, embedded into infrastructure and CI/CD pipelines, and aligned to our AWS first, Terraform led platform model. We are looking to expand and mature further our Platform Engineering capabilities by introducing a Security Platform Engineering team, with a goal to make secure by default the best and easiest path for squads building customer facing services. This team will engineer and operate reusable security capabilities as internal products, embedding security controls directly into infrastructure, CI/CD pipelines and service templates. Working closely with Cloud Platform Engineering, Security Operations and other engineering squads, the function will...

About Freetrade Freetrade’s mission is to become the default place to invest. Investing has been too complicated and expensive for too long, keeping millions from making the most of their savings. We’re changing that. We’re building our team and looking for people who are excited to reshape how our customers invest and grow their wealth. If you’re driven by solving complex problems and building innovative products, you’ll fit right in. 2026 is a big year for us. Last year, we announced a game changing deal to become part of the IG Group. We’ll continue to operate as an independent business while gaining access to the resources and support of an established leader in the space. This year, we’re accelerating our roadmap and taking our products to the next level. We’re building new features like mutual funds, bonds, and family investment tools. We’re also exploring how we can leverage AI to deliver an even better experience for our customers. Why Join Our Engineering Team?...

About Freetrade Freetrade’s mission is to become the default place to invest. Investing has been too complicated and expensive for too long, keeping millions from making the most of their savings. We’re changing that. We’re building our team and looking for people who are excited to reshape how our customers invest and grow their wealth. If you’re driven by solving complex problems and building innovative products, you’ll fit right in. 2026 is a big year for us. Last year, we announced a game changing deal to become part of the IG Group. We’ll continue to operate as an independent business while gaining access to the resources and support of an established leader in the space. This year, we’re accelerating our roadmap and taking our products to the next level. We’re building new features like mutual funds, bonds, and family investment tools. We’re also exploring how we can leverage AI to deliver an even better experience for our customers. Why Join Our Engineering Team?...

Who we are About Stripe Stripe is a financial infrastructure platform for businesses. Millions of companies - from the world’s largest enterprises to the most ambitious startups - use Stripe to accept payments, grow their revenue, and accelerate new business opportunities. Our mission is to increase the GDP of the internet, and we have a staggering amount of work ahead. That means you have an unprecedented opportunity to put the global economy within everyone's reach while doing the most important work of your career. About The Team Metronome, now part of Stripe, is the leading usage-based billing platform built for modern software companies. With Metronome, companies can launch products faster, offer any pricing model, and streamline finance workflows without writing code. Our platform computes millions of invoices per billing period and is scaling rapidly to accommodate new customers, saving them hours of development time and manual invoicing and enabling them to use...

Elliptic has helped trace and disrupt over $21.8 billion in illicit crypto laundered across blockchains, from sanctioned nation states to organized crime networks hiding funds through token swaps and unregulated exchanges. It’s how compliance and investigations teams fight back, tracking and screening transactions with 99% market coverage. The infrastructure behind all of this needs to be as resilient and sharp as the intelligence it delivers. We're looking for a Lead DevOps Engineer to own and evolve our DevOps practices. This is a role for someone who combines deep technical ability with a genuine passion for growing the team. You'll lead a team of DevOps engineers while staying close to the technical work, setting direction on infrastructure, automation, and reliability. The Impact You Will Have As a Lead DevOps Engineer at Elliptic, you will have a deep impact across the company by championing DevOps, security, and reliability principles. You’ll help build a culture of...

About Equals Equals is the next-generation global money movement platform built for exceptional businesses operating across borders. We bring international payments, embedded finance, and more together into a single connection that simplifies operations and strengthens financial control. With deep expertise and integrated infrastructure, Equals turns financial complexity into reliable solutions. With our headquarters in London and teams around the UK and Europe, you will join a very close-knit, talented and supportive team from various backgrounds who believe that bringing different perspectives together helps us understand our customers' needs. United, by one thing, making money management straightforward and cost-effective for our customers. About the role This is a high-leverage product role. You will own Cards as a vertical: the strategy, the roadmap and the outcome, and you'll be judged on how much bigger and stronger the business is because of decisions you made....

Join us in building the future of finance. Our mission is to democratize finance for all. An estimated $124 trillion of assets will be inherited by younger generations in the next two decades. The largest transfer of wealth in human history. If you’re ready to be at the epicenter of this historic cultural and financial shift, keep reading. About the Team: Bitstamp Exchange Platform Bitstamp made history in 2011 as the world’s first regulated crypto exchange. As a key part of the Robinhood family, the Exchange Platform team owns the full service lifecycle. We are the architects of a modern, high-velocity ecosystem that enables our global expansion, ensuring the world’s longest-running exchange remains unshakeable. The Role As a Senior Backend Engineer integrated into the Exchange Platform team, you will be a key driver of our modernization strategy. You will be an essential part of building the new generation infrastructure for low-latency services in the cloud, adopting...

LMAX Group is looking for a tester for our C++ development team. In this position you can expect to help design and implement automated testing suites as well as conduct exploratory testing of our trading applications. You will also be assisting the development team to ensure that new code is designed with testing in mind. We are looking for testers who are confident in their ability to create tests, both with others and on their own. A finance or trading background is not required. What You Will Be Working On Our code base currently has extensive automated tests from unit test to integration tests and acceptance tests. All our tests run through our CI every 15 minutes and we are looking to maintain and expand this test suite as we create new features. There will also be some time allocated to exploratory testing to try and find elements of the system that are not functioning correctly. Our developers prefer to practice TDD. This is the first Tester hire for the team, so you...

We are looking for a Security Platform Engineering Manager to define, build and operate a portfolio of reusable security capabilities that can be consumed by engineering squads as part of our product delivery. This role will combine technical leadership with hands on engineering, ensuring that security controls are delivered as code, embedded into infrastructure and CI/CD pipelines, and aligned to our AWS first, Terraform led platform model. We are looking to expand and mature further our Platform Engineering capabilities by introducing a Security Platform Engineering team, with a goal to make secure by default the best and easiest path for squads building customer facing services. This team will engineer and operate reusable security capabilities as internal products, embedding security controls directly into infrastructure, CI/CD pipelines and service templates. Working closely with Cloud Platform Engineering, Security Operations and other engineering squads, the function will...

Build AI-powered product capabilities that automate, predict, and simplify user workflows Spendesk is looking for a Backend Software Engineer (IC3) to join our AI & Data Products squad and help build the next generation of product features powered by AI, ML, and intelligent automation. This is a hands-on backend role focused on turning predictive models, LLM capabilities, and business intelligence into real product experiences. You will work on backend services, APIs and MCPs that bring automation, prediction, and assisted decision-making into Spendesk’s user journeys, helping reduce manual work and make our product more proactive and intelligent. You will collaborate closely with the 3 ML Engineers in the squad, as well as Product Managers, Designers, and applicative squads across Spendesk. Together, you will build production-grade services that expose ML-driven and LLM-driven capabilities in ways that are reliable, observable, and valuable for end users. About...

About Us ClearBank was built on the belief that banking infrastructure should unlock progress, not slow it down. Our clients — from fintechs and crypto platforms to banks and credit unions — use our API to power their banking infrastructure. Our people power our technology and shape the way we work. We are a group of ambitious, collaborative people who challenge the norm and believe in fairness, autonomy and choice. We empower people with the tools to learn, grow and contribute to our clients’ success. About The Role You’ll join the Developer Experience team as a Senior AI Enablement Engineer, helping shape how ClearBank adopts, governs and measures AI across software engineering at scale. This role is for someone who can operate beyond individual tool usage and help define the platform, practices and controls needed for responsible AI-enabled engineering. You will work across multiple engineering teams to turn AI experimentation into scalable...

Elliptic has helped trace and disrupt over $21.8 billion in illicit crypto laundered across blockchains, from sanctioned nation states to organized crime networks hiding funds through token swaps and unregulated exchanges. It’s how compliance and investigations teams fight back, tracking and screening transactions with 99% market coverage. The infrastructure behind all of this needs to be as resilient and sharp as the intelligence it delivers. We're looking for a Lead DevOps Engineer to own and evolve our DevOps practices. This is a role for someone who combines deep technical ability with a genuine passion for growing the team. You'll lead a team of DevOps engineers while staying close to the technical work, setting direction on infrastructure, automation, and reliability. The Impact You Will Have As a Lead DevOps Engineer at Elliptic, you will have a deep impact across the company by championing DevOps, security, and reliability principles. You’ll help build a culture of...

Department: Technology Location: London Description Overview of the role This role leads the Banking and FX tribe, which owns payment processing, FX pricing and trading, the ledger, reconciliation, bank integrations, FIX engine connectivity, payment compliance, and the client portal. You will manage six to eight engineers and own the tribe's delivery and OKRs. You'd work with product, design and stakeholders across the business to turn client problems into things we actually ship and support. This is not a fully hands-on role, but you need to be technical enough to help your team when they need it, review code, and break the tie when a decision has to be made. Key Responsibilities Own delivery and OKRs for the tribe. Forecast it, sequence it, and say early when something is slipping. Work with product, design and stakeholders to turn client problems into shipped software. Push past the first solution someone offers to the problem underneath it. Take the...

Role Overview The Director of Engineering – UK Payments will provide senior technology leadership for ClearBank’s UK-focused payments capabilities, owning the technical strategy, delivery oversight, and evolution of this domain, providing a highly utilised and relied upon set of capabilities for clients. This role will lead an established set of teams as they evolve payments capabilities to scale and meet developing client needs. The Director will collaborate closely with Product partners to shape the long‑term roadmap, ensure robust technical foundations, and guide ClearBank’s progression in this vital domain. Key Responsibilities Strategic Leadership Own the technology strategy for UK Payments, ensuring alignment with ClearBank’s wider platform and technology strategy. Partner with the Head of Product for UK to define and evolve a clear, credible roadmap covering near‑term delivery and longer‑term technical direction. Provide domain leadership and technical...

Our LINQ platform is the software that plans, schedules, and drives life-science labs. Our clients run labs for cancer diagnostics, drug discovery, cell manufacturing, synthetic biology and more. This role owns the interface to the lab — not just the UI, but every surface someone builds on or acts through: the app a scientist touches, the APIs and SDK an integrator builds on, the CLI an engineer scripts with, the agent surface a model acts through. Most product interfaces are forms over a database. Ours front a physical world that changes by itself — robots act, schedules change, instruments fail — and every one of those surfaces has to keep its user genuinely in control. We're building the next generation of our interfaces — AI-native from the ground up: personalised to role and behaviour, UI generated on the fly where it earns its place, and agents working in the product alongside the people using it. This is a role for someone user-obsessed — the platform underneath is...

Staff Product Manager - API Connectivity Product Ebury London Office - Hybrid: 4 days in the office, 1 day working from home per week We are looking for an experienced Product Manager to own API Connectivity with ERP and accounting platforms . This role will lead the strategy, delivery, and evolution of integrations with systems such as Sage, QuickBooks, and ERP aggregators (e.g. Codat, Merge, Apideck) . You will be responsible for building scalable, high-quality integrations that power financial workflows for our partners and customers, working closely with engineering, external vendors, and internal stakeholders. This role is critical to expanding the reach and adoption of Ebury’s API platform. What you’ll do Product ownership & strategy Own the Connectivity (ERPs) product domain , including: Direct integrations (e.g. Sage, QuickBooks) and Third-party aggregation platforms (e.g. Codat, Merge, Apideck) Define the product vision, roadmap, and success...

About MoonPay MoonPay is for builders with something to prove. This isn't a "work on cool crypto stuff" company. It's a high-standards, high-velocity, high-accountability company building the operating system for value movement. If the internet moves information, we move value: crypto, stablecoins, tokenized assets, and whatever comes next. Four offerings make that real: fund, tokenize, trade, and spend. 30M+ customers and 500+ ecosystem partners run on us. Licensed in the U.S. Regulated across the UK, EU, Canada, and Australia. AI is the default operating mode here. It's woven into every role, and we expect you to use it daily. It handles the manual work so you can deliver on what actually matters. You'll thrive here if outcomes excite you more than process, if impact motivates you more than titles, and if you want hard problems, real ownership, and teammates who love winning, building, and doing it together. The bar is high. The pace is real. We're building for what's next,...

Description About Xe Xe is a cross-border payments platform. We help SMEs and consumers in the US, UK, Canada, Australia, and New Zealand collect, convert, hold, and send money across markets. Each year, over 300 million people use Xe for currency information and over 350,000 use us to send money overseas. Today, we're rebuilding the platform layer behind cross-border payments for corporate and consumer clients. We're small enough that your code ships fast and your decisions matter, and Euronet Worldwide (Nasdaq: EEFT) backs us so the problems stay real-scale. About This Role We're hiring a senior back-end engineer who owns real problems end-to-end and shapes how the team builds, from API design and data modeling through to service implementation, production reliability, and launch. You already use AI as part of how you think, build, test, and ship. You'll write code that moves money in production, design and modernize the backend services the platform runs on, and lead...