Golang Back End Developer

We’re looking for a Mid-level / Mid+ Go Backend Engineer to build and operate high-throughput microservices.

You’ll focus on performance, reliability, and clean design, using profilers and remote debugging to keep services fast and stable in production.

***Mid-level / Mid+ Go (Golang) Backend Engineer — High Load & Microservices.

Location

• Paraćin
• Niš

Requirements

• Design, build, and operate Go microservices for high-load, low-latency workloads (REST/gRPC)
• Profile and optimize code (CPU/memory/trace) using pprof, go tool trace, flame graphs
• Perform remote debugging in real environments (Delve, VS Code Remote, port-forwarding)
• Write robust unit tests (table-driven) and meaningful benchmarks (go test -bench), keep coverage healthy
• Integrate with data/streaming systems: Kafka, Redis, MongoDB, ClickHouse
• Ship via GitLab CI/CD (pipelines, runners, Docker images); automate quality gates
• Contribute to service observability (metrics/logging/tracing/Prometheus/OpenTelemetry/Jaeger)
• Apply design patterns and clean architecture; participate in code/design reviews

Must have 

• 2–3+ years of backend experience, 2+ with Go in production
• Strong Go fundamentals: concurrency (goroutines, channels, context, sync), profiling, performance tuning
• Hands-on microservices experience (Docker)
• Remote debugging proficiency (Delve) and production troubleshooting skills
• Solid testing discipline (unit tests, benchmarks) and GitLab CI/CD experience
• Practical knowledge of REST/gRPC and at least one of Kafka/Redis/MongoDB/ClickHouse
• Familiarity with design patterns, SOLID/clean architecture, idiomatic GoN

Nice to have

• Deeper expertise with Kafka (consumer groups, idempotency, exactly-once patterns), schema registry (Avro/Protobuf)
• ClickHouse performance tuning; Redis as cache/rate-limit/locks; MongoDB schema design
• Observability stacks (Prometheus, Grafana, OpenTelemetry, Jaeger, Loki)

Why join

• Impact: own services that process real traffic at scale
• Modern stack, strong engineering culture, code reviews, technical growth

At HORISEN we build a workplace that supports, inspires and encourages our people. We foster a work environment where people are motivated to give their best and feel good about what they do.

Work:

Dynamic work in a company with more than 20 years of experience in a future-oriented industry

Competence:

Opportunity to grow under the mentorship of colleagues with extensive experience and to make a personal contribution

Team:

A powerful mixture of highly experienced professionals and young team members who are motivated, open-minded and easy to cooperate with

Cooperation:

A supportive, non-toxic environment with a safe space to share your ideas and opinions

Workplace:

A modern working environment with everyday refreshments and a good mood

Salary:

A competitive salary with performance-related improvements and great development opportunities

Opportunity:

Chance to contribute to cutting-edge messaging technology development, expand knowledge and master your professional skills

Social benefits:

Private medical insurance including regular check-ups, access to private hospitals etc., for employees’ well-being and self-care