Backend Specialist – High-Performance, Data-Intensive Systems

• Design and evolve high-performance, scalable, and resilient backend services
• Lead complex technical initiatives, from architecture through production rollout
• Build pipelines for ingesting, processing, and serving large volumes of data (batch, streaming, parallelism)
• Identify and eliminate performance and resource-consumption bottlenecks (CPU, memory, I/O, cost)
• Modernize the architecture by evolving legacy systems, decomposing monoliths, and building distributed services
• Develop resilient messaging and integrations with retries, idempotency, circuit breakers, and DLQs
• Ensure quality through testing, code reviews, and observability
• Lead critical incident response and root cause analyses
• Use AI as a core part of development (AI First) without compromising quality and security
• Serve as a technical reference and mentor the team

• Advanced proficiency in Node.js and TypeScript (event loop, asynchronous programming, memory, performance)
• Advanced proficiency in NestJS and/or Express
• Experience with distributed systems, microservices, and high volumes of data and requests
• Advanced proficiency in MongoDB and/or PostgreSQL, including data modeling, indexing, and query optimization
• Experience with messaging systems (Kafka, RabbitMQ, SQS) and caching (Redis)
• Hands-on experience with profiling, load testing, and observability (metrics, logs, and tracing, preferably OpenTelemetry)
• Knowledge of Docker and cloud platforms (AWS and/or GCP)
• Advanced use of AI tools in day-to-day development
• Understanding of trade-offs between performance, cost, and complexity, along with autonomy and strong communication skills to influence technical decisions
• Multi-tenant architectures
• SRE practices (SLIs, SLOs, and error budgets)
• Observability with OpenTelemetry and Dash0
• English proficiency

• Life Insurance
• Language Allowance
• Pet Life and Dog Life
• English Pass
• Wellhub (Gympass)