Senior Software Engineer (Java) - API Excellence Job at Adyen (Amsterdam)

Senior Software Engineer (Java) - API Excellence

Adyen

Location:
Netherlands , Amsterdam

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

About the Team: Adyen's Single Platform is a cornerstone of our business, and we empower our teams with autonomy to drive its growth. This dynamic environment has led to a rich and evolving API ecosystem. To build on this success, we are continually investing in the developer experience, enhancing the consistency and ease of use across all our APIs and SDKs. This ongoing commitment makes integration faster for our customers and accelerates our own pace of delivering new features. The API Excellence team is being formed at a critical juncture, with the rise of AI-assisted development, to address these challenges and create a single platform API experience that empowers developers—both human and AI—to build with speed and confidence. This team is central to that vision. The Scope: You will oversee the architecture not just for our core APIs, but also for our client-facing SDKs across Java, C#, Node.js, Go, Ruby, Python, and PHP. The Mission: We are defining the 'Golden Path' for API development, building the tooling that empowers developers—both human and AI—to build with speed and confidence.

Job Responsibility:

Architect the Future: Design the 'One Platform' strategy, moving us toward unified versioning and consolidated SDKs to reduce merchant integration time
Drive Governance & Influence Leadership: act as a key advisor to our API design guild and senior leadership
provide critical feedback on technical feasibility and roadmap risks
Force Multiplier: scale your impact through systems, not just effort
codify your expertise into linter rules, automated guides, and architectural standards
Mentorship: engage deeply in code reviews and design discussions to elevate the team's technical bar and foster a supportive, learning-driven culture
Bridge the AI Gap: Lead our R&D into AI-assisted integration, building Model Context Protocol (MCP) servers that allow AI agents to navigate our API specs and SDKs
Build High-Leverage Tooling: Develop the linter rules, CI/CD gates, and upgrade tooling that automatically steer hundreds of internal developers toward compliance

Requirements:

7+ years of engineering experience with a strong background in Platform Engineering, Developer Experience (DevEx), or API Infrastructure
Deep understanding of REST and OpenAPI, specifically regarding the challenges of managing breaking changes and versioning at scale
Architectural Strategy: understand the nuance between 'loosely coupled' and 'highly aligned' systems and can design for both
view APIs as a Product
Polyglot Versatility: comfortable navigating and reviewing code across multiple languages (e.g., Java, C#, Node.js, Go, Ruby, Python, or PHP)
Strategic Influence: excel at driving technical change without direct authority
can confidently articulate technical tradeoffs to Senior Leadership
Foundational Pragmatism: balance innovation with stability
committed to executing foundational improvements
Mentorship: take a hands-on approach to leadership

Nice to have:

Tooling & Automation: Experience building developer tools, SDKs, or maintaining automated CI/CD quality gates/linters
AI-Native Design: Experience with (or a keen interest in) designing APIs for AI-assisted integration, including concepts like Model Context Protocol (MCP) and optimizing error messaging for AI agents
Emerging Standards: A growth mindset toward industry trends such as GraphQL or Arazzo Specs, with the pragmatism to evaluate their fit for the organization

Additional Information:

Job Posted:
March 05, 2026

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