We are looking for a Senior Go Engineer
Language Proficiency: Upper-Intermediate
Employment type: Full time
Candidate Location: Poland, other EU countries, Kazakhstan, Serbia, Armenia, Georgia
Working Time Zone: CET
Start: ASAP
Planned Work Duration: 3 months this year + 3 months next year
Customer Description:
A general mobility and urban services platform enabling users to book rides and other services while negotiating fares directly with service providers.
Project Phase: ongoing
Soft Skills:
Ability to explain project architecture and the business problems addressed in depth.
Ability to independently clarify ambiguous requirements, define metrics, address concurrency and edge cases, and articulate technical trade-offs.
Hard Skills / Must Have:
5+ years of production backend engineering experience and complex product development.
Strong Go expertise: concurrency, synchronization, context propagation, goroutine lifecycle management, and graceful shutdown.
Experience with high-load distributed systems and microservice architecture.
Strong SQL and data modelling: schema design, joins, indexes, query analysis, replication, partitioning, and sharding.
Experience with MySQL or PostgreSQL and Redis caching strategies.
Sync/async inter-service communication using gRPC and message brokers, including delivery guarantees and idempotency.
Observability: metrics, logging, tracing, alerting,



and Go profiling.
Understanding of NFRs, SLA/SLO/SLI, Docker, Kubernetes, CI/CD, and cloud platforms.
Maintainable, testable code; unit/integration testing; Git and code review workflows.
Hard Skills / Nice to Have:
Event-driven architecture experience with Kafka, NATS, or RabbitMQ.
Infrastructure-as-code experience with Terraform or Pulumi.
Performance profiling and optimisation of Go services.
Familiarity with Figma, cross-platform collaboration, and AI-assisted development tools.
Responsibilities and Tasks:
Design, develop, and maintain scalable backend services and features.
Drive technical research, architecture design, and implementation.
Collaborate across teams, conduct reviews, and contribute to architectural discussions.
Own service delivery, production monitoring, maintenance, and observability.
Mentor engineers and participate in agile ceremonies.
Technology Stack: Go, Microservices, PostgreSQL/MySQL, Redis, gRPC, Docker, Kubernetes, AWS, CI/CD
Interview stages: English check (15 minutes)
internal technical interview (1-1,5 hour)
client interview (1 hour)
client interview – live coding
client interview – cultural fit (45 minutes)
What we offer Model: B2B contract with Bonapolia - one contract, one monthly invoice
Rate: negotiated per candidate seniority and client budget

📌 Senior Go Engineer (Zaragoza)
🏢 Bonapolia
📍 Zaragoza