Senior Backend Engineer - Introducer Tech

iwoca; Greater London; Hybrid; GBP 80,000 - 100,000; Full time

Benefits offered by this job

Flexible working hours

Private GP service

25 days holiday per year

3% pension contributions

Employee equity incentive

Job summary

iwoca is seeking a Senior Backend Engineer for the Introducer Tech team, focused on the Lending API and partner integration in Germany. The role combines hands-on engineering with mentoring and shaping the technical direction, while collaborating with UK engineers to align API design on a Europe-wide scale.

The position is hybrid in London with remote options within the UK, offering ownership of critical systems and opportunities to impact how partners and brokers access iwoca's finance.

Qualifications

• Backend engineering: designed and built production backend systems in Python (Django, FastAPI or Flask).
• API design: built and evolved APIs used by other teams or companies.
• Ownership: scoped solutions from problem to production and iterated based on usage.
• Mentoring: helped engineers grow through code reviews and design sessions.
• AI leverage: built agentic workflows or used AI to scale engineering output.
• Communication: write and speak clearly, adapt detail to audience.

Responsibilities

• Own the Lending API in Germany end to end, deciding what to build and when to release.
• Own the developer portal and tools used by partners for integration.
• Ship features that help partners pre-qualify customers and simplify integration.
• Automate parts of the broker funnel and internal CRM to reduce friction.
• Set the team's technical direction and shape the product/tech roadmap.
• Mentor and coach teammates and collaborate with UK engineers on API alignment.

Skills

Backend engineering

API design

Ownership

Mentoring

AI leverage

Communication

Job description

Senior Backend Engineer - Introducer Tech - DE

Hybrid in London / Remote within the UK

We’re looking for a Senior Backend Engineer

You’ll own the Lending API in Germany, which banks, fintechs, brokers, and comparison sites build on to offer iwoca's finance to their customers.

The company

Small businesses move fast. Opportunities often don't wait, and cash flow pressures can appear overnight.

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 £5 billion in funding.

Our passionate team is driven to help even more SMEs succeed, through access to better finance and other services that make running a business easier. Our ultimate mission is to support one million SMEs in their defining moments, creating lasting impact for the communities and economies they drive.

The team

Introducer Tech builds the systems that partners in Germany use to refer businesses to iwoca. The aim is to get new partners integrated quickly and to make applying simple for their customers. The team also looks after how partners earn commission.

Its work covers three main areas:

• The Lending API. Developing the versioned API and the webhooks that keep partners up to date on their customers.

• The Introducer Portal. Building the web app that German brokers log in to, to submit applications and upload documents.

• The sign-up journey. Improving how businesses apply and how well they convert, after a partner referral.

The team is growing to have two product managers, who each focus on either the broker or the partner flow, and three engineers across the backend and frontend, including this hire.

The team currently works in sprints, with three stand-ups a week and planning every two weeks. However, there is room to adapt how it works as it grows.

The role

You’ll be the senior engineer behind iwoca's broker and partner channels in Germany, from the tools partners integrate with to the internal systems that broker account managers use.

Ownership and autonomy

• Own the Lending API in Germany end to end, deciding what to build, when to release a new version, when to retire an old one, and what iwoca can promise partners.

• Own the developer portal and every tool partners use to integrate, from documentation that their developers and coding agents can build from to self-serve testing that needs no help from iwoca.

Impact

• Ship the features that make partners choose iwoca, starting with pre-qualification, which shows a customer what they could borrow before they apply.

• Make integration quick and simple, so a partner can go live with few questions and little hand-holding.

• Automate parts of the broker funnel and the internal CRM that broker account managers use, cutting friction and the lag between a decision and the action that follows, and building agents wherever they help.

Growth trajectory

• Set the team's technical direction and shape the product and technical roadmap alongside the product manager.

• Align designs with the UK engineers who share the API, so German requirements shape the design from the start.

• As well as being hands on, you'll develop your mentoring and coaching skills. You'll help lead the team as the most senior engineer.

You’ll work with the commercial colleagues who bring in new partners, and join the team's weekly support rotation.

The requirements

Essential:

• Backend engineering. You've designed and built production backend systems in Python - ideally with Django, though FastAPI or Flask count too. You've used PostgreSQL or another relational database in production, and kept it fast and maintainable.

• API design. You've built and evolved APIs that other teams or companies depend on, and made the decisions on structure, versioning, and change.

• Ownership. You've taken work from a commercial problem through to production - scoping the solution, making the trade‑offs, and iterating based on how people use it.

• Mentoring. You've helped other engineers grow through code reviews and design sessions.

• AI leverage. You've built agentic workflows, or used AI to scale your engineering output beyond what you could deliver alone. You judge when to use it and when not to.

• Communication. You write and speak clearly, directly, and concisely. You adapt technical detail to your audience.

Bonus:

• Partner onboarding. You've helped external developers integrate with an API – through documentation, test environments, or working with them directly.

• Full-stack. You've contributed to frontend codebases, particularly in React or TypeScript.

• CI/CD. You've set up or maintained the pipelines that test and release a production service.

• Measurement. You've used data, metrics, or A/B tests to check whether a change had the effect you intended.

The salary

We expect to pay from £80,000 to £100,000 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, the best idea wins. We model our culture on independent thinking, challenging untested logic, and evidence-based decisions. We prioritise learning and growth, and give people the autonomy to develop in the direction that makes them most effective.

We're a tech company and believe in the power of AI to help us work faster and better. We provide the infrastructure where every iwocan always has access to the best models and where those models have access to all of our data. We will help our people to learn how to use and grow with the new tools available to them.

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.

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.

Useful links:

• iwoca benefits & policies.

• Interview welcome pack.