OnHires - Senior Fullstack Engineer

• You are a senior engineer who has shipped production systems under real load and knows what it costs to maintain them. You don’t just write features - you own the systems they live in. You’ve made architectural decisions you had to live with, debugged production incidents under pressure, and learned firsthand why test coverage matters before code leaves your hands. • You operate with high autonomy. You take a problem, break it down, make decisions, and deliver - without needing someone to check on you. When something is ambiguous, you resolve it. When something breaks in production, you fix it and make sure it doesn’t break the same way again. • You are pragmatic about AI. You use agentic tools to move faster, but you review what they produce with the same rigor you’d apply to any junior engineer’s code. You understand that AI is leverage, not a replacement for judgment - and you invest in making agents better by improving the context they work with. • You communicate directly and efficiently. You write things down - in tickets, in documentation, in code - because you know that knowledge locked in one person’s head is a team liability, not a personal asset. • Qualities we seek • 5-7+ years of commercial full-stack development experience • Strong Python and Django/DRF skills with production Postgres experience under real load • Production-level React and TypeScript - not side projects, not tutorials • Proven ability to own a domain without micromanagement: architecture, code quality, test coverage, technical debt • Self-directed work style with direct collaboration with product managers - no intermediary layers • Experience with multi-tenant systems, high-volume data, or complex data pipelines • Russian as primary working language; English at professional working level • Active use of AI and agentic tools in your development workflow - or a demonstrated willingness and ability to adopt them rapidly • ClickHouse or other analytical databases • High-load systems, fintech, or similarly demanding environments • Kubernetes, Helm, Terraform, CircleCI - enough to debug a broken pipeline, not just use one • Message queues and distributed systems: Kafka, RabbitMQ, idempotency patterns • What they expect of you • You do what you say you will do - a core company principle. • Own your zone of the codebase fully - architecture, quality, documentation, and operational health. Your zone should be legible to any senior engineer without you in the room. • Build features end-to-end: API through UI. No, “I only do backend.” Fullstack means fullstack. • Write tests as part of building, not after. Every PR includes tests for the code it introduces. Agents can help generate them; you own the output. • Work with agentic tools as your primary execution layer. Formulate tasks with precise context. Review agent output at the level of architectural decisions and edge cases, not syntax. • When agents fail - invest in improving their context (agents.md http://agents.md, skills, documentation) rather than completing the task manually. This is how the system compounds. • Collaborate directly with product managers to clarify requirements before development starts. Ambiguities get resolved in tickets, not in Slack threads. • Participate in code review with rigor and speed. Reviews should take no more than 5–10% of your time - if they take more, something is wrong upstream, and we expect you to raise it.