Senior Golang Backend Engineer

Horisen; Brasil; Remote; BRL 200,000 - 420,000; Full time

Benefits offered by this job

Private medical insurance

Remote work from Brazil

Job summary

HORISEN in Brazil is seeking a Senior-level / Senior+ Go Backend Engineer to build and operate high-throughput microservices, focusing on performance, reliability, and clean design. You will work from a Brazil-based Home Office, delivering scalable Go services for REST/gRPC workloads with strong profiling and testing practices.

You will design, implement, profile, and maintain services deployed in production, using Go, REST/gRPC, and modern observability tools.

Qualifications

• 8+ years of backend experience in production environments.
• Strong Go fundamentals and concurrency knowledge.
• Experience with REST/gRPC and data stores like Redis/MongoDB/ClickHouse.

Responsibilities

• 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.
• Write robust unit tests and meaningful benchmarks; keep test coverage healthy.
• Integrate with data/streaming systems: RabbitMQ, 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.

Skills

Go programming

Backend architecture

Concurrency patterns

Performance profiling

Remote debugging (Delve)

Testing (unit/benchmarks)

GitLab CI/CD

REST/gRPC APIs

Message stores (RabbitMQ/Redis/MongoDB

English proficiency

Tools

Docker

pprof

Go tool trace

OpenTelemetry

Grafana

Jaeger

Prometheus

Job description

You could be just the right person for this job. Become part of the HORISEN family.

HORISEN is an international software company active in the fields of mobile telecommunications and digital marketing.

With our comprehensive cloud software solutions, we’ve become a competent and innovative partner to many mobile phone companies and marketing experts worldwide. Ever since 2001, we have been continuously recognized as market leaders in our business vertical.

As telecom and marketing experts, we specialize in enabling direct communication between brands and their clients via all kinds of mobile messages, e.g. SMS, Messenger, etc. Our software enables our customers to efficiently and reliably send billions of messages to mobile recipients worldwide. We enable communication that is targeted, secure and fast.

Senior-level / Senior+ Go (Golang) Backend Engineer — High Load & Microservices

ABOUT THE ROLE

We’re looking for a Senior-level / Senior+ 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. Working from Home Office (Must be in Brazil)

What you’ll do

• 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.
• Write robust unit tests (table-driven) and meaningful benchmarks (go test -bench), keep coverage healthy.
• Integrate with data/streaming systems: RabbitMQ, 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

• 8+ years of backend experience, 6+ with Go in production.
• Strong Go fundamentals: concurrency (goroutines, channels, context, sync), profiling, performance tuning.
• 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 RabbitMQ/Redis/MongoDB/ClickHouse.
• Familiarity with design patterns, SOLID/clean architecture, idiomatic Go.
• Very good English Skills (speaking, listening, reading and writing skills)

Nice to have

• Telecom Protocol Knowledge (SMPP, SS7)
• ClickHouse performance tuning; Redis as cache/rate-limit/locks; MongoDB schema design.
• Observability stacks (Prometheus, Grafana, OpenTelemetry, Jaeger, Loki).
• Impact: own services that process real traffic at scale.
• Modern stack, strong engineering culture, code reviews, technical growth.

What you will find with us

Work

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

Competence

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

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

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

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

About HORISEN

HORISEN is an award-winning technology software house for retail and wholesale messaging technology. We offer a wide variety of business messaging solutions – feature-rich, carrier-neutral, and sales-driven to messaging companies. With more than two decades of experience and passion for software development, we are revolutionizing messaging business by developing at the edge of technological possibilities.