Senior Fintech Solutions Engineer - Open Finance & API

Kraken; Greater London; On-site; GBP 70,000 - 110,000; Full time

Job summary

Kraken is seeking a seasoned Solutions Engineer to drive technical discovery and design winning pre-sales solutions in collaboration with sales and our Partner Solutions Lead. You will run PoCs, map customer architectures, and hand off to implementations with clear documentation.

You will represent REST/WebSocket API integrations, OAuth/JWT security, and bespoke fintech integrations, communicating clearly with technical buyers and cross-functional teams to close deals.

Qualifications

• 4+ years in a technical pre-sales role (solutions engineering or solutions architecture) at a B2B API or infrastructure company.
• Proven track record executing the technical pre-sales motion - discovery, solution design, PoC delivery, and deal-winning
• Fluency with REST/WebSocket APIs, auth patterns (OAuth, JWT), webhook architecture, and integration debugging
• Experience designing and building complex integrations for technical buyers at fintechs, banks, or neobanks - including customizations and bespoke work
• Strong knowledge transfer skills - you know how to package a solution design so an implementation team can execute it faithfully
• Clear, structured communicator who can run a discovery call, a design review, and a handoff debrief back to back
• Experience writing RFPs and documenting solution approaches that clearly communicate how our product and our customizations will solve a customer's problem

Responsibilities

• Run technical discovery with prospective customers alongside sales and our Partner Solutions Lead - map their architecture, constraints, and compliance needs to our product suite (Embed, Ramp, Earn, xStocks, CF Benchmarks)
• Surface recurring customer asks and product gaps from your deals and feed them to the Solutions Architect to inform the roadmap
• Design tailored solutions spanning our existing offerings, customizations to those offerings, bespoke integrations built on top of our platform, or hands-on work directly in the customer's codebase
• Scope and build proof-of-concepts that demonstrate technical feasibility and win the deal
• Own a clean, structured handoff to our Implementation team - delivering PoCs, solution design docs, and knowledge transfer sessions that ensure what was promised gets built
• Execute the pre-sales playbook - discovery frameworks, solution templates, PoC standards, and handoff runbooks - and contribute improvements back to the team as you learn what works

Job description

Kraken is seeking a seasoned Solutions Engineer to drive technical discovery and design winning pre-sales solutions in collaboration with sales and our Partner Solutions Lead. You will run PoCs, map customer architectures, and hand off to implementations with clear documentation.

You will represent REST/WebSocket API integrations, OAuth/JWT security, and bespoke fintech integrations, communicating clearly with technical buyers and cross-functional teams to close deals.