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Staff Back End Engineer - Finance Technology at iwoca. Remote Location: London. Staff Back End Engineer - Finance Technology. Hybrid in London (UK) or Remote within the UK. We’re looking for a Staff Back-End Engineer. You’ll combine deep technical knowledge with business context to help us launch a credit card and scale our financial systems.. The company. Imagine a world where every small business has the power to thrive. That's the world we're building at iwoca. Small businesses aren't just statistics – they're the heartbeat of our communities, the character of our high streets, and the engine of our economy. Since 2012, we've revolutionised how these businesses access finance, turning what was once a lengthy, frustrating process into something remarkable: funding that's fast, flexible, and actually works for modern businesses.. Our impact speaks for itself: we've provided billions in funding to more than 150,000 businesses across Europe, making us one of the continent's leading fintech innovators. But we're just getting started. Our mission? To empower one million businesses with the financial tools they deserve.. We combine cutting-edge technology and data science with genuine human understanding to make finance feel less like a barrier and more like a superpower. Whether a business is managing cash flow or seizing unexpected opportunities, we ensure they get the funds they need – often within minutes.. The team. The Finance Technology team builds and maintains the payment infrastructure and financial data systems that power iwoca’s growth. We partner with Finance to build scalable tools and support other product teams to launch new products with the right payment and data foundations. The team is currently six engineers working closely with a Tech Lead and Product Manager, using Agile methods to ship code frequently and solve complex problems together. Three of the team work remotely and five are hybrid, based in London.. The role. As a Staff Back End Engineer in the Finance Technology team, you’ll lead the technical design and development of iwoca’s financial data systems, starting with a new credit card ledger — a critical component for product expansion. You’ll work with stakeholders across Finance to shape architecture, ensure accuracy and scalability, and mentor engineers while staying hands-on with code.. The projects. You’ll work on engineering projects that give you scope to own architecture, solve complex problems, and influence how iwoca’s financial systems evolve, such as:. Credit card ledger. : Scale a new ledger system to process hundreds of thousands of daily transactions with precision and resilience, enabling accurate real-time reporting and reconciliation.. Payments infrastructure:. Extend and improve the systems that power real-time payments, ensuring reliability, scalability, and seamless integration with new products.. Financial data systems:. Build and maintain services that provide Finance, Accounting, and Capital Markets teams with accurate, timely data for reporting, planning, and compliance.. Technical leadership:. Guide engineers through complex design decisions, mentor team members, and set standards that raise quality, documentation, and performance across the group.. The requirements. Essential:. Experience designing and building scalable back-end systems for payments or financial ledgers.. Proficiency in Python, writing clean, efficient, and well-tested code.. Experience designing data models for payments systems, ensuring accuracy, scalability, and maintainability, ideally using PostgreSQL.. Experience architecting highly available systems that process large transaction volumes (10,000+ per day).. Experience leading projects end to end, from scoping and design through to production.. Experience mentoring engineers and setting technical standards.. Clear, concise written and verbal communication, focusing on outcomes and impact.. Numerical or technical background, ideally with a degree in maths, physics, computer science, engineering, or a related field.. Bonus:. Experience with Django.. Experience with infrastructure-as-code and CI/CD pipelines.. Experience with Rust.. The salary. We expect to pay from £100,000 - £140,000 for this role. But, we’re open-minded, so definitely include your salary goals with your application. We routinely benchmark salaries against market rates, and run quarterly performance and salary reviews.. The culture. At iwoca, we prioritise a culture of learning, growth, and support, and invest in the professional development of our team members. We value thought and skill diversity, and encourage you to explore new areas of interest to help us innovate and improve our products and services.. The offices. We put a lot of effort into making iwoca a great place to work:. Offices in London, Leeds, Berlin, and Frankfurt with plenty of drinks and snacks. Events and clubs, like bingo, comedy nights, football, etc.. The benefits. Flexible working hours. Medical insurance from Vitality, including discounted gym membership. A private GP service (separate from Vitality) for you, your partner, and your dependents. 25 days’ holiday per year, an extra day off for your birthday, the option to buy or sell an additional five days of annual leave, and unlimited unpaid leave. A one-month, fully paid sabbatical after four years. Instant access to external counselling and therapy sessions for team members that need emotional or mental health support. 3% Pension contributions on total earnings. An employee equity incentive scheme. Generous parental leave and a nursery tax benefit scheme to help you save money.. Electric car scheme and cycle to work scheme. Two company retreats a year: we’ve been to France, Italy, Spain, and further afield.. And to make sure we all keep learning, we offer:. A learning and development budget for everyone. Company-wide talks with internal and external speakers. Access to learning platforms like Treehouse