Senior Product Engineer (Full Stack)

SENIOR PRODUCT ENGINEER (FULL STACK) | Paid contract Build software that helps people turn AI evaluation evidence into decisions they can explain and act on. Syntony works across AI evaluation, security, and governance. We’re hiring a Senior Product Engineer to develop GovTune AI and Resonance , spanning product interfaces, APIs, and data models. The work involves consequential product questions: how to make complex evidence understandable, preserve the history behind a finding, support human review, and connect identified risks to responsible teams and follow-up. You’ll translate those requirements into dependable software. What you’ll do Build GovTune AI workflows connecting evaluation traces to draft findings, controls, and human review. Develop Resonance interfaces linking attack paths to test evidence, responsible teams, responses, and retesting. Design APIs and data models that preserve the context and history of reviewed records. Implement accessible interfaces, reliable permission checks, and robust import and export flows. Diagnose production issues and improve existing software. Write tests, review implementation decisions, and maintain documentation that supports future development. What you’ll bring A bachelor’s degree in computer science, software engineering, or a related field, or equivalent practical experience (Master's degree in software engineering, ML engineering, or a related field preferred). At least 5 years of professional software engineering experience , including shipping and maintaining production web applications across frontend, backend, APIs, and databases. Sound judgment about data integrity, access controls, accessibility, and interface design. The ability to clarify requirements with technical and nontechnical users and translate them into manageable implementation plans. Experience making architectural decisions and explaining their tradeoffs. Clear written communication and work samples that demonstrate your contribution. This role suits someone who enjoys taking a complex workflow from requirements through implementation and making it clear, reliable, and useful. Contract terms This is a paid contract role. Duration and schedule are agreed for each project. Deliverables, milestones, rates, payment terms, expected availability, and acceptance criteria will be agreed in writing before work begins. The agreement will also cover confidentiality, intellectual property, access requirements, and handover. How to apply Share your experience, availability, and relevant work through our Senior Product Engineer application. You can also email with “Senior Product Engineer (Full Stack)” in the subject line. Please explain your contribution to the work you share, including significant engineering decisions you made.