Solutions Engineer in London, United Kingdom

Founding Solutions Engineer | Hybrid in London | Up to £150k + Equity

We're working with a high-growth fintech building next-generation card issuing and payments infrastructure powered by stablecoins.

The platform enables Visa and Mastercard card issuance without reliance on traditional banking partners, allowing near-instant settlement for merchants, end users to spend in their preferred currencies and full custody of assets to remain with the user.

The business has gone from concept to live product in under a year, has secured multi-million dollar VC funding, and is already live with well-known partners in the crypto and fintech ecosystem. Usage is accelerating rapidly, and the company is now scaling its partner and customer-facing technical function.

The Opportunity

This is a Founding Solutions Engineer role, a rare chance to join early and help define how technical partnerships are delivered.

It’s a hybrid role combining:

• Solutions Engineering
• Customer Success
• Technical Product input

You’ll own the end-to-end technical journey for partners, from pre-sales through integration, launch, and expansion, working closely with sales, product, and backend engineering.

What You’ll Be Doing

Partner & Customer Ownership

• Act as the primary technical contact for partners
• Guide customers through API integrations and onboarding
• Troubleshoot and resolve complex integration issues
• Support partners post-launch and help them scale

Pre-Sales Technical Support

• Join sales calls as the technical expert
• Answer deep technical questions from customer engineering teams
• Review partner architectures and advise on integration approaches
• Help assess technical fit during the sales process

Product & Engineering Collaboration

• Work closely with backend engineers to design scalable APIs
• Feed real customer pain points into the product roadmap
• Identify recurring issues and patterns across integrations
• Improve documentation, integration guides, and best practices

• Help establish the Solutions / Partner Engineering function from the ground up
• Create processes, standards, and tooling as the company scales

What We’re Looking For

Experience

• 5–10 years’ experience in software engineering or technical partner roles
• 3+ years in a Solutions Engineer, Partner Engineer, or similar customer-facing role
• Strong experience within card payments
• PSPs, acquirers, issuers, networks, or processors
• Fintech experience essential; crypto / blockchain exposure is a plus

Technical

• Strong experience with APIs and system integrations
• Comfortable reviewing architectures and explaining trade-offs
• Tech stack is TypeScript, but a language-agnostic mindset is key

Personal Attributes

• Comfortable operating in ambiguous, early-stage environments
• Confident working directly with customers and pushing back when needed
• Product-minded with strong commercial awareness
• Motivated by ownership and impact rather than process
• Salary up to £150k DOE
• Meaningful equity in a high-growth business
• Private health insurance
• 20 days holiday (rising to 25 after year two)
• High ownership, fast progression, and direct exposure to senior leadership

Why This Role?

• Rare first-in-function hire
• Stablecoins are becoming core to modern financial infrastructure
• Strong product-market traction and accelerating growth
• High engineering bar and demanding but rewarding environment
• Opportunity to gain experience that’s highly valuable across fintech and payments

If you want the opportunity to work in a growing VC-backed start-up/scale-up, where you will be the first-of-its-kind hire and have a huge impact in the business, please apply now!