Senior Full-Stack Engineer (Backend heavy) - Full-time - EMEA

The Company

Early-stage technology company building B2B verification infrastructure for European markets. The platform automates a process that currently takes days or weeks per buyer: pulling company registry data, credit bureau reports, bank references, trade references, and sanctions screening, then assembling it into a standardised, decision-ready profile.

Buyers build a verified profile once and share it with any trading partner. The data compounds across a network. The more businesses join, the richer and faster verification becomes.

The technical challenge: Europe has fragmented company registries across 13+ countries, country-specific credit bureaus, PSD2 Open Banking, multi-language compliance, and document formats ranging from structured APIs to scanned PDFs. That complexity is what makes the problem harder and the moat deeper.

The Role

We need a senior full-stack engineer to build the first version of this platform on a rolling contract basis, working directly with the founder. This is a hands-on, solo engineering role in the early phase. The work:

Verification Pipeline Orchestrating European data sources into a single reliable workflow: company registries (Companies House, INPI, Handelsregister), credit bureaus (Creditsafe), Open Banking via PSD2 aggregators (TrueLayer, Powens, finAPI), VAT validation (VIES), and sanctions/AML screening. Each source has its own API behaviour, data formats, and failure modes. Making these integrations work consistently across countries is the core technical challenge.

Data Normalisation A French INPI record looks nothing like a UK Companies House filing. Credit reports from Creditsafe UK differ structurally from Creditsafe DE. You would build the abstraction that normalises all of this into a unified, consistent buyer profile regardless of country of origin.

Supplier Dashboard and Buyer Portal The interface where credit teams review assembled verification packets and where buyers complete their profile. Functional frontend, not a design project, but the data presentation must be clear and decision-ready.

Database and API Architecture Data model for multi-country buyer profiles, supplier workspaces, verification events, and network-level profile reuse. Every verification step must be logged and auditable.

What We Are Looking For

• 5+ years production engineering experience • Strong backend (Node.js or Python, PostgreSQL) with the ability to build a clean, functional frontend (React) • Experience integrating multiple third-party APIs and handling inconsistent external data, different formats, rate limits, downtime, schema changes • Comfortable architecting from zero. This is greenfield infrastructure, not feature work on an existing codebase • Able to work independently as the sole engineer, making pragmatic architecture decisions that prioritise speed to market • Clear communicator who can translate technical tradeoffs into business language

Bonus: Experience with European financial data sources (Open Banking aggregators, credit bureaus, company registries), fintech/regtech/compliance background, ERP integration (Xero, QuickBooks, NetSuite), or previous startup experience in a founding or early engineering role.

Other

• Location London preferred. Remote considered for the right candidate.
• Commitment Full-time.
• Path Forward For the right person, there is a potential path to a permanent engineering role.
• Start Date ASAP.

Stack

• Node.js or Python (backend) • React (frontend) • AWS (Lambda, API Gateway, SQS, S3). Serverless preferred