Senior Full stack engineer
18 days ago
London
Pynea is an AI hiring intelligence system built around evidence, not impressions: real capability in context, not past credentials, with a candidate experience designed to show more than a CV. Most hiring systems turn people into data: scanned, skimmed, forgotten. We’re building the opposite. A voice-first, challenge-led application journey that feels like a conversation from the start, and gives hirers signal they can trust. We’re in full build mode towards launch, and we operate like a top-tier creative engineering studio: small team, high taste, high ownership, low bureaucracy. We’re hiring a Senior Fullstack engineer to build the enterprise backbone that makes all of this possible: high-concurrency APIs, event-driven systems, and reliability foundations that turn messy hiring inputs into trusted signal, fast, secure, GDPR-safe, and ready to scale. The role (what you own) You’ll own the enterprise backbone across a few high-impact areas: Enterprise-grade architecture Standardised patterns from intake → build → QA → deploy → measure. Secure by default, GDPR-safe, compliance-ready. Full-stack workflow automation Scalable GraphQL APIs, integrations, event-driven systems, monitoring/logging, error handling, and documentation that scales beyond you. What you’ll build (real scope) - High-concurrency APIs and reliability mechanisms (retries, idempotency, queues) - Event-driven systems that don’t drop data - Dashboards/reporting surfaces that remain consistent under load - Cloud-ready architecture across GCP (with minimal AWS for asset management) - Systems designed to ship fast, stay robust, and scale cleanly What success looks like - Features ship fast without hacks - The system scales from 10 → 10,000+ users with confidence - Reliability is visible: monitoring, alerts, error tracking, runbooks - Security is default: permissions, audit trails, GDPR-safe practices - Clear scoreboard: uptime, latency, error rates, queue health, enterprise readiness metrics - AI is applied with taste and rigour: you help us ship AI-powered capabilities that are measurable, monitored, and safe, not magical or brittle - You’re a visionary when it comes to AI and its impact on modern engineering: you bring new ideas and practical patterns that raise delivery speed and quality without compromising correctness Who thrives here You dive in and help debug issues collaboratively. You ship production-grade systems quickly. You make sharp trade-offs without sacrificing reliability. You communicate crisply async (short Looms, diagrams, notes). You enjoy building enterprise systems that teams can depend on. You’re AI-native in practice. You’re curious enough to explore what’s possible and disciplined enough to ship what’s reliable. You can build AI into the product in a production-safe way (guardrails, evals, monitoring, failure modes), and you bring a strong point of view on how AI should reshape the engineering workflow, raising speed and quality without sacrificing correctness. Must-haves - NodeJS, GraphQL (NestJS), PostgresSQL - Data structures - OOP principles - Understanding of complexity principles and correct approaches - Experience with AI and LLMs (including but not limited to Gemini) - Strong analytical and problem-solving skills in a fast-changing environment - Reliability mindset: monitoring, logging, retries, QA, incident-aware design - Comfortable operating in a sprint with incomplete context and tight deadlines - Experience in GCP, Prisma and terraform Additional Skills - Code quality & maintainabilityWrites readable, consistent, and well-structured code - Understands trade-offs between speed of delivery and long-term maintainability - Comfortable working in a shared codebase with established guidelines - Testing mindsetUnderstands the value of unit, e2e, and regression tests to minimise disruption to the frontend apps - Writes testable code and doesn’t rely solely on manual testing - Collaboration & ownershipCan work closely with frontend, product, and design teams - Takes ownership of features end-to-end - Comfortable giving and receiving code reviews Ready to apply? If this sounds like the kind of challenge you’re up for, apply now. We look forward to hearing from you.