Mid - Senior Software Engineer (SDET)

Role Overview

Mid–Senior Software Engineer (SDET) at Sphere Labs focused on owning release quality, strengthening CI/CD, and scaling automated testing for cross-border payments infrastructure.

Responsibilities

• Own the release process: uphold release criteria, coordinate across engineering, and determine whether changes are ready to ship.
• Shape the CI/CD pipeline alongside engineering: define effective gates, reliable signals, and confidence-building tooling from commit to deploy.
• Translate product/acceptance criteria into test cases with product and engineering, covering:
  • happy paths
  • edge cases
  • failure modes
• Execute tests continuously as the platform grows to catch regressions and surface bugs before customers.
• Collaborate to improve platform testability by enhancing test isolation, seams between components, and overall verification friendliness.
• Build and maintain scalable automated test suites to reduce manual effort and move quality into the delivery pipeline.
• Raise the engineering testing bar through code review, documentation, pairing, and pragmatic guidance across layers of the stack.

Requirements

• Solid programming fundamentals and the ability to write clean, maintainable test code.
• Hands-on experience owning or significantly contributing to release processes and shipping reliably.
• Experience designing/evolving CI/CD pipelines (gates, automation, maintaining fast builds and strong signal-to-noise).
• Familiarity with GitHub Actions (plus).
• Experience writing automated tests across unit, integration, and end-to-end.
• Strong analytical skills for turning user journeys into the most important test cases.
• Excellent written communication (test plans, precise bug reports, explaining testing principles).
• Self-directed and systematic work style, comfortable with async collaboration across time zones.

Nice to Have

• TypeScript familiarity.
• Experience with GCP or similar cloud platforms.
• Testing API-driven or payments products, including familiarity with KYC/KYB, webhooks, or financial compliance surfaces.