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Senior Backend Engineer

Location

Poland

Posted

73 days ago

Salary

$160 - $180 / hour

Seniority

Senior

Job Description

Senior Backend Engineer

Entrada AI

Role Description You'll be joining the team as a backend engineer responsible for architecting and owning the core platform powering the predictive intelligence system. This includes: - Authentication - Metering - AI pipeline orchestration - Billing You'll work directly with leadership and influence every major technical decision. What You'll Own - Authentication & Identity: Firebase Auth, SSO foundations, tenant/user modeling, tier-based feature gating - RCA Engine: Vertex AI/Gemini integration, prompt engineering, structured response parsing, high-performance request routing - Storage & Data Layer: Redis for ephemeral RCA storage, DuckDB + Kafka (Pub/Sub on GCP) for persistent data, Cloud SQL + pgvector for embeddings - Quota & Usage Management: Monthly RCA limits, trial tracking, enforcement logic, upgrade triggers - Billing & Subscriptions: Stripe integration, webhooks, lifecycle automation, tier transitions - Observability & Reliability: Logging, metrics, tracing, error tracking, audit logs, health checks Qualifications - 4+ years backend engineering experience (Python or Node.js preferred) - Production RESTful API experience - Hands-on GCP services experience (Cloud Run, BigQuery, Cloud SQL, or equivalents) - LLM API integration and tuning experience (Vertex AI, OpenAI, Anthropic, etc.) - Stripe (or similar) billing/subscription integration experience - End-to-end system ownership in fast-moving teams - Strong debugging, performance tuning, and reliability engineering fundamentals Requirements - Firebase Authentication (or equivalent identity platforms) - Redis for caching or ephemeral data - Apache Iceberg, data lakes, or multi-tier storage design - Freemium/tiered SaaS product experience Benefits - Competitive Salary: 160-180/h - Start: ASAP - Stable Employment: Contract signed with our Polish entity (Entrada AI Poland) - 100% Remote: Full flexibility to work from anywhere in Poland - Apple Hardware: Macbook Air M4 15" provided - Referral Bonus: Bonus for bringing other top-tier engineers to the team - Professional Growth Recruitment Process - Introductory Call (20 min): Short conversation with our Recruiter to discuss your background and expectations - Technical Interview (60 min): Deep dive into your technical skills with our engineering team - Optional Client Interview: Required only in specific cases - Decision & Offer: We aim to close the process efficiently

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