2 days ago
Remote, Poland or Warsaw, PolandSenior
Responsibilities
- Own high-throughput event-pipeline services, including backpressure, load shedding, circuit breakers, retries, and dead-letter handling.
- Own the Elasticsearch query and search layer, including pagination, memory limits, and rate-limit behavior.
- Own sandboxed execution of customer-authored logic and integrations with Piano products and third-party systems.
- Drive cross-team integration work, negotiate technical contracts, coordinate rollouts, and create decision records.
- Review code, test determinism, scope epics, and make technical trade-offs with product and business stakeholders.
- Run production changes through Helm and FluxCD GitOps.
- Participate in on-call duty, including alert response, P1/P2 triage, hotfixes, and root-cause communication.
- Improve Claude Code context, agent tooling, and evaluation of agent-written output.
- Maintain platform systems through dependency and TypeScript upgrades, static analysis, CVE migrations, CI work, and legacy teardown.
Requirements
- Daily fluent Claude Code practice on production code and sound judgment about appropriate agent use.
- Strong Node.js and TypeScript experience, including ESM, strict tsconfig, Jest, and Mocha.
- Deep Elasticsearch 8.x experience with mappings, reindexing, sorting, range semantics, deep pagination, and backpressure.
- At-scale Kafka experience with partitioning, consumer concurrency, lag, dead-letter handling, and topic lifecycle management.
- Production ownership experience including on-call, evidence-backed root-cause analysis, Datadog instrumentation, toggle-gated rollouts, and profiling-driven performance work.
- PostgreSQL experience with an ORM, including migrations, indexing, and transaction semantics.
- Willingness to own Kubernetes, Helm, GitOps, GitLab CI, dependency upgrades, and CVE triage.
- Clear technical English and ability to communicate technical positions with product and business stakeholders.
- Preferred experience with MCP servers, agent skills, internal developer tooling, V8 isolates, ClickHouse, Aerospike, ArangoDB, Redis, gRPC, Testcontainers, WireMock, Rush, pnpm workspaces, high-volume multi-tenant data platforms, or maintenance-level Java.
Benefits
- Flexible working hours, competitive compensation and benefits, and a laptop of choice.
- Work from the Warsaw office while collaborating with a team headquartered in Kyiv.
- Generous token-usage budgets focused on coding agents.
- Ownership of systems used by global media brands and influence over the technology stack.
- Applicants must be authorized to work in Poland without sponsorship from Piano.
Tech Stack
Apache KafkaClickHouseDatadogElasticsearchGitLab CI/CDgRPCHelmJavaJestKubernetesMochaNode.jsPostgreSQLRedisTypeScript
Categories
About Piano
Piano builds a SaaS digital experience platform that combines analytics, subscription/paywall management, identity, and journey orchestration for publishers and consumer brands. Customers use Piano Analytics and subscription tools to segment audiences, personalize offers, and manage paid relationships across web and apps. Privately held and headquartered in Amsterdam, it serves global enterprises including the BBC, The Telegraph, Nikkei, and The Wall Street Journal.