Primis
Senior Software Engineer
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Role: Senior Software Engineer
Tech: node.js, TypeScript, MCP
Client: Fintech Payments Platform
Compensation: base + bonus + unlimited holiday + remote working + home setup
Model: Remote
Role Overview:
We're hiring on behalf of a client for a Senior Software Engineer to help design and build a suite of servers using an emerging AI protocol standard to create the secure, governed layer that lets AI agents interact safely with a payments platform. Working closely alongside a principal level engineer and the wider team, you'll build core components: transport and session handling, authentication, the tools and interaction surfaces AI agents rely on, and the operational backbone that keeps it all safe at scale. This is a genuinely new and evolving space, with real ownership from day one.
What You'll Do:
- Design and build components of a suite of servers exposing platform data and capabilities to AI agents and developer tooling
- Implement transport and session handling for stateful, long running AI agent interactions
- Build authentication and authorization into services, integrating OAuth based flows via an internal identity provider.
- Contribute to the edge and gateway layer for token validation and routing
- Build quality in across the software lifecycle using modern testing and CI/CD practices
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What We're Looking For:
- 6-8 years in a software engineering role
- Proficiency in a modern backend language like TypeScript/Node.js or Python preferred
- Working knowledge of OAuth 2.0/OIDC, JWT validation, token scoping, and identity provider integration
- Exposure to edge or serverless environments
- Security conscious mindset
- Hands on familiarity with modern AI agent protocols
- Understanding of LLM tool use and agentic patterns
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What's On Offer:
- Fully remote, permanently
- Excellent annual leave allowance
- Home office setup payment + monthly WFH allowance
- Generous annual budget toward certifications and training
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Research indicates that men will apply to a role when they only meet 50-60% of the descriptions, however, when looking at women and other minority groups, they can look for up to a 99% match in order to apply to a role. If you feel you are a fit for our role, please still apply, don’t worry if you don’t tick every single box. We’d still love to hear from you. We encourage underrepresented talent to apply to all our roles & support accessibility need.
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