About the role
This role is a chance to tackle complex, high-impact challenges at the heart of our fintech platform. You will join the team that owns iwoca's ledger — the system of record for the money we lend and collect — and you will be responsible for scaling it across the full lifecycle of our credit card and lending products, building the reconciliation and reporting that prove it correct, and laying the foundations for our next generation of products. This is a hands-on role: you'll design these systems, write the code, and own them in production.
About the company
Small businesses move fast. Opportunities often don’t wait, and cash flow pressures can appear overnight. To keep going, and growing, SMEs need finance that’s as flexible and responsive as they are. That's why we built iwoca. Our smart technology, data science and five-star customer service ensures business owners can act with the speed, confidence and control they need, exactly when it's needed. We’ve already cleared the way for 100,000 businesses with more than £4 billion in funding. Our ultimate mission is to support one million SMEs in their defining moments.
Responsibilities
- Lead the delivery of projects involving many stakeholders and systems.
- Develop deep expertise in our domain and become a trusted technical advisor to the business.
- Perform detailed technical scoping and prototyping.
- Architect and implement scalable solutions for complex challenges: the lifecycle of an account, interest and repayment allocation, reconciliation, and how financial data reaches our reporting stack.
- Use domain modelling to find the simple design behind a complicated problem.
- Build solutions that avoid single points of failure, and make sure our releases happen with zero downtime.
- Translate ambiguous product requirements into clear, actionable technical plans.
- Promptly investigate and fix live issues, and ensure they do not resurface.
- Contribute high-quality, production-ready code and foster a collaborative environment.
- Work with the team to improve our development and agile practices.
- Share new approaches and tooling with the wider engineering group.
- Validate AI output for correctness, performance and security.
Salary
We expect to pay from £80,000 to £110,000 for this role. We routinely benchmark salaries against market rates, and run quarterly performance and salary reviews.
Benefits
- Flexible working hours.
- Medical insurance from Vitality, including discounted gym membership.
- A choice between a dedicated dental plan or a health cash plan.
- A private GP service 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.
- 3% Pension contributions on total earnings.
- An employee equity incentive scheme.
- Generous parental leave and a nursery tax benefit scheme.
- Electric car scheme and cycle to work scheme.
- Two company retreats a year.
- A learning and development budget for everyone.
- Company-wide talks with internal and external speakers.
- Access to learning platforms like Treehouse.
Culture and Offices
- Offices in London, Leeds, Berlin, and Frankfurt with plenty of drinks and snacks.
- Events and community-led groups, including running groups, padel, and monthly ping-pong and pool competitions.
- We prioritise a culture of learning, growth, and support, and invest in the development of our team members. iwoca benefits & policies
Essential
- Extensive back-end engineering experience.
- Experience building and running microservices and distributed systems in production.
- Extensive experience with relational databases, ideally PostgreSQL.
- Experience with systems where correctness is a hard requirement — ledgers, accounting, billing or payments, ideally in a regulated setting.
- Experience leading a feature or project end to end.
- You use AI (like Cursor, Claude Code or similar) in your daily flow.
- A strong technical or mathematical foundation, evidenced by a degree in a quantitative field or equivalent professional experience.
- You work well as a peer: pairing on hard problems, giving useful code review, and unblocking teammates.
- Clear written and verbal communication.
Bonus
- A background in high-logic or high-scale fields like Fintech, Gaming, Healthcare Tech, Logistics, Security/Cryptography or similar.
- Working knowledge of modern data tooling - ideally Snowflake and dbt.
- Knowledge of messaging frameworks and event-driven patterns (e.g. Kafka).
