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 integral 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
* Payment: monthly invoice, paid on the same schedule the client pays us (usually 30 days)
* Contract written under your country's law
* We handle the client-side paperwork: MSA, NDA, invoicing About Bonapolia Bonapolia is a family-owned IT staff augmentation team based in Lisbon. We build engineering teams for product companies and IT consultancies across Europe and the US. More at bonapolia.com

📌 Senior Go Engineer (Comunidad de Madrid)
🏢 Bonapolia
📍 Comunidad de Madrid