Senior Software Engineer

The Fabric Gateway team is building the API gateway for the AI era, one of Postman's most ambitious greenfield infrastructure products. We're a small, high-ownership team working 0-to-1 designing and shipping the foundational primitives that will power how agents and applications connect to services securely, at scale.
This isn't incremental work. We're building from scratch, making the kind of decisions that define a product's architecture for years. If you've built platform or infrastructure products at a cloud-native or SaaS company and know what it takes to go from zero to a production system engineers trust, you'll feel right at home here.
Responsibilities:
Design, build, and own critical systems of the Fabric Gateway from the ground up; this is founding-level engineering work.
Lead architecture decisions for distributed systems that need to be fast, reliable, and correct at scale, handling high request volumes across a diverse ecosystem of services.
Drive technical direction and make high-leverage decisions; you'll be setting patterns the rest of the team follows.
Own observability, performance, and reliability end-to-end SLA targets; monitoring and on-call are your personal responsibility, not a handoff.
Collaborate closely with the EM and PM to scope milestones, prioritise ruthlessly, and iterate toward Early Access and GA.
Participate in design and code reviews, raise engineering standards, and mentor fellow engineers.
Requirements:
6+ years of experience building infrastructure-level or platform software in cloud-native or SaaS environments.
Proven 0-to-1 track record: you've taken something from whiteboard to production and operated it at scale.
Deep systems design expertise: you've built distributed systems that handle high throughput, stay resilient under load, and scale horizontally without breaking operational simplicity.
Proficiency in GoStrong fundamentals in systems programming and performance-sensitive code are essential.
Solid grasp of security primitives: mTLS, JWT, OAuth 2.0 RBAC/ABAC.
High ownership mindset: reliability, performance, and security are your problem, not someone else's ticket.
Strong communication skills; comfortable driving clarity in fast-moving, ambiguous environments.
Nice to Have:
Prior experience building or extending platform or gateway products.
Familiarity with modern protocol ecosystems (HTTP/2 gRPC, WebSockets).
Kubernetes-native deployment experience: Helm, operators, CRDs.
Contributions to open-source infrastructure or developer tooling projects.
Experience working in an early-stage 0-to-1 environment inside a larger company.

Experience
5-9 yrs