Senior Software Engineer (Distributed Systems)

We are toogeza, a Ukrainian recruiting company that is focused on hiring talents and building teams for tech startups worldwide. Currently, we are looking for a Full-Stack Developer for Spinlab . Location: Remote Job Type: Full-Time About our client: We help slot gaming leaders unlock the potential of their data, enhancing business outcomes and strengthening their competitive edge in the market. We collect and process data using advanced methods and technologies to provide our clients with clear, actionable recommendations based on real metrics. SpinLab's goal is not just to collect data but to transform it into meaningful business insights that improve efficiency and help products grow. Product Overview: A B2B web analytics and user-identification platform for browsers and webviews. High RPS, real-time event processing, and an analytics database powering customer-facing reporting. This role requires close collaboration with product and business stakeholders to translate requirements into practical solutions. Stack: Language and runtime: TypeScript, Node.js, NestJS. Data: ClickHouse (clustered, Kafka engine, materialized views), Apache Kafka, Redis. Browser SDK: Web Components, built with Rollup + Terser. Infrastructure: AWS (EKS, S3), Helm + ArgoCD, Docker, GitHub Actions. Observability: Datadog (APM, logs). Repository: Nx monorepo. Scope of ownership: Backend: high-RPS collection and identification endpoints, a Redis-backed key-value store, Kafka producers, ClickHouse migrations. Browser SDK: evolving signals and fighting regressions on Safari and iOS. Operations: observability (APM, RED signals, SLO alerts), GitOps delivery via Helm and ArgoCD. Requirements: 4+ years of TypeScript / Node.js; 2+ years of NestJS in production. Production experience with clustered ClickHouse and with Kafka as a producer. Redis beyond GET/SET: pipelines, Lua, key design for high cardinality, distributed locks. Experience designing distributed systems under load (idempotence, retries, caching). Browser internals: hands-on experience with Canvas, WebGL, and AudioContext; cross-origin iframes; storage partitioning. Experience shipping a third-party SDK under tight size and privacy constraints. Strict-mode TypeScript, Docker, ability to read Helm templates and GitHub Actions. Conventional Commits, a strong review and documentation culture. Working English (RFCs and code review happen in English). Benefits: Work on meaningful data products and shape them with your vision. 25 vacation days + 15 sick days + 1 birthday leave. Budget for English classes. Budget for health insurance. Annual education & development budget. Remote-friendly culture with a small, dedicated team.