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

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📌 Senior Go Engineer (Madrid)
🏢 Bonapolia
📍 Madrid