Back End Engineer - Partner Flow at iwoca in London

Job description

• Application
• Back End Engineer - Partner Flow Team
• Hybrid in London / Remote within the UK
• We’re looking for a Back End Engineer to join the Partner Flow team.
• This role is a chance to shape how thousands of small businesses find their way to iwoca. You'll join the team that owns iwoca's partner integrations — the Lending API and embedded flows that let third-party platforms, from major banks to fintechs, offer iwoca loans inside their own customer journeys. You'll own projects, collaborate with stakeholders, and design robust systems to deliver important functionality and measurably improve the experience for our partners and customers.
• The role
• You’ll work on challenging projects all over iwoca’s codebase - anywhere there are improvements to be made for partners and partner-referred customers. You’ll be encouraged to bring your own ideas and take responsibility for areas of functionality.
• Own features and projects from scoping and design through to production.
• Collaborate with other engineers to meet the team’s goals, whilst being trusted to define your own solutions and work independently on your part of the problem.
• Design and maintain robust, flexible, and maintainable systems to ensure scalability and fast-paced development.
• Deliver new functionality critical to onboarding important new partners.
• Run experiments (RCTs) and optimise the funnel to measurably improve how partner-referred customers convert.
• Leave code, docs, and processes in better shape than you found them.
• Work on systems that genuinely help businesses get the funding they need.
• Collaborate with our partners and internal stakeholders to design effective solutions.
• Use data to make decisions, uncover insights, and refine strategies.
• We're pushing hard on AI-assisted development. Engineers here write clear technical specs, let skills and agents implement boiler-plate, and hold a high bar on code review — the person, not the model, is accountable for what merges. We expect AI output to be validated for correctness, performance and security like any other change.
• We give the team unlimited tokens across all models and expect people to experiment.

Responsibilities

• Own features and projects from scoping and design through to production.
• Collaborate with other engineers to meet the team’s goals, whilst being trusted to define your own solutions and work independently on your part of the problem.
• Design and maintain robust, flexible, and maintainable systems to ensure scalability and fast-paced development.
• Deliver new functionality critical to onboarding important new partners.
• Run experiments (RCTs) and optimise the funnel to measurably improve how partner-referred customers convert.
• Leave code, docs, and processes in better shape than you found them.
• Work on systems that genuinely help businesses get the funding they need.
• Collaborate with our partners and internal stakeholders to design effective solutions.
• Use data to make decisions, uncover insights, and refine strategies.

Requirements

• Experience designing and building scalable back-end systems, ideally in Python.
• Experience working with relational databases, ideally PostgreSQL, with an understanding of performance and maintainability considerations.
• Experience building and maintaining APIs that are easy to use, reliable, and well-documented.
• Experience managing projects end to end, from understanding business problems to designing and delivering technical solutions.
• Pragmatism in balancing delivery speed with long-term system health.
• Clear, concise written and verbal communication, focusing on outcomes and impact.
• A genuine team player: you support your teammates, share knowledge, and care about the team's success as much as your own.
• AI fluency. Experience using AI coding tools to accelerate real delivery, and a genuine interest in getting better at it - with a pragmatic sense of where it adds value and where it doesn't.
• Front-end development experience, particularly with React and Typescript.
• Experience with DevOps practices, including containerisation and CI/CD pipelines.
• Experience with experimentation (e.g. A/B tests or RCTs) or using data to drive product decisions.
• Working knowledge of modern data tooling - ideally Snowflake and dbt - used to build analytical or reporting pipelines.

Skills

Required

• Back-end development
• Scalable systems design
• Python (ideally)
• API development
• Project management
• Pragmatism
• Communication
• Teamwork
• AI fluency

Preferred

• Experimentation (A/B tests, RCTs)
• Data tooling (Snowflake, dbt)

Benefits

• 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 community-led groups, including running groups, padel, and monthly ping-pong and pool competitions.
• Flexible working hours.
• Medical insurance from Vitality, including discounted gym membership.
• A choice between a dedicated dental plan or a health cash plan that reimburses everyday medical expenses.
• 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.
• A learning and development budget for everyone.
• Company-wide talks with internal and external speakers.
• Access to learning platforms like Treehouse.
• We expect to pay from £60,000—£85,000 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.