Impactful Implementation Engineer (Fintech Europe)

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

Job summary

Plaid Europe is seeking an Implementation Engineer to own customer integrations from contract signature to production live. You’ll draft integration plans, run kickoffs, and debug with customer engineers to ensure successful go‑live across API, SDK, OAuth redirects, and webhooks.

You’ll also build scalable resources, validate sandbox setups, and maintain smooth handovers to Account Management while escalating issues with clear evidence. Remote and regional collaboration across Europe is common.

Qualifications

• 4+ years in a customer-facing technical role, such as implementation, integration, solutions, or technical account management, ideally at an API platform.
• Hands-on experience with REST APIs, OAuth, webhooks, JSON, and web and mobile SDKs.
• Comfort working in Postman or curl and reading API documentation critically.
• Experience with SQL or other data querying tools.
• A track record of owning technical projects end to end, with real deadlines and direct relationships with customer engineers.
• Clear written communication skills, including plans, handovers, and customer updates.
• Comfort working independently in a small regional team alongside a globally distributed function.
• Nice-to-Haves: knowledge of open banking, UK Open Banking, PSD2/PSD3, AIS/PIS, and VRP; domain depth in payments, identity verification, or credit and underwriting; formal technical background or prior software engineering experience; experience with mobile integrations; fluency in a second European language.

Responsibilities

• Own a portfolio of customer integrations from signature to production launch, including plans, milestones, and exit criteria.
• Run scheduled implementation support for standard integrations, as well as one-off debugging engagements for customers who need a targeted fix.
• Lead technical onboarding for existing customers adopting a new Plaid product, use case, or market.
• Debug integration issues hands-on with customer engineers across API, SDK, OAuth redirect, and webhook behaviour.
• Validate sandbox implementations and run go-live readiness checks.
• Use Plaid’s own data to proactively diagnose integration and conversion problems.
• Produce written handovers to Account Management and maintain the team’s reusable implementation resources.
• Escalate recurring integration failures to Product and Engineering as clear patterns, backed by evidence.

Skills

REST APIs

OAuth

Webhooks

JSON

SDKs

Technical project ownership

Clear written communication

Tools

Postman

curl

SQL

Job description

Plaid Europe is seeking an Implementation Engineer to own customer integrations from contract signature to production live. You’ll draft integration plans, run kickoffs, and debug with customer engineers to ensure successful go‑live across API, SDK, OAuth redirects, and webhooks.

You’ll also build scalable resources, validate sandbox setups, and maintain smooth handovers to Account Management while escalating issues with clear evidence. Remote and regional collaboration across Europe is common.