Full Stack Engineer

Contract Full Stack / Backend Engineer III - Trust & Safety Platforms • Duration: 6-Month Contract (with potential for extension) • Location: 100% Remote (UK-based) • Inside/Outside IR35: Insert IR35 The Opportunity We are looking for a Senior Full Stack / Backend Engineer (Level III) to join the Trust & Safety / Policy Platform team for one of the world's leading, household-name audio streaming platforms. If you are a backend-heavy engineer who enjoys the autonomy of building robust APIs and crafting the internal web tools that power them, this contract is for you. What You'll Do • Engineers at Scale: Build and scale the core APIs and services that expose complex policy logic across detection, enforcement, and compliance surfaces. • Data & ML Pipelines: Model data for strict auditability, versioning, and efficient querying, feeding structured datasets directly into downstream machine learning models. • Empower Internal Teams: Design and implement intuitive, responsive web interfaces that allow non-technical stakeholders (Legal, Operations, Trust & Safety) to author and manage content policies with robust approval workflows. • Ensure Compliance: Translate global regulatory requirements into airtight engineering constraints and audit trails. What You'll BringThis is a true full-stack role with a 70% Backend / 30% Frontend split. We need someone who is equally comfortable thinking about schema evolution as they are about frontend state management. • Backend Mastery: Strong production experience building high-scale services using Java, Kotlin, or Go. • Modern Frontend Skills: Hands-on experience building clean, intuitive internal tooling using React and TypeScript. • System Design & Integrity: Deep understanding of API design, backward compatibility, and data modeling for complex, versioned systems where stability is critical. • Data Savvy: Experience working with data pipelines and a solid grasp of the trade-offs between real-time and batch processing. • Mindset: An eye for usability. You know how to make high-stakes, complex workflows feel simple and foolproof for non-technical users. If you are interested in this role, please apply here or share your updated resume to Randstad Technologies is acting as an Employment Business in relation to this vacancy.