Senior Software Engineer at FusionHit

Setup: Remote
Location: São Paulo, São Paulo
Type: Full-time
Level: Senior
Posted: Jun 15, 2026

Description

FusionHit is seeking a Senior Software Engineer specializing in Golang to lead the development and evolution of core applications for an MDR (Managed Detection and Response) platform. This role involves owning and scaling high-impact security infrastructure, collaborating with cross-functional teams, and contributing to technical leadership within a fast-paced cybersecurity environment.

Required Skills

Golang
GitHub Actions
Docker
Redis
OpenSearch
SQL databases
Networking protocols
TLS
Git
CI/CD pipelines
Automated testing
Infrastructure monitoring
Observability practices

Additional Information

Required Previous Experiences: 6+ years of software engineering experience
at least 4+ years focused on Go development
Preferred Qualifications: Idiomatic fluency in Golang, including deep familiarity with the standard library, goroutine lifecycle management, and channel-based communication
Expertise implementing thread-safe data structures, worker pool patterns, and memory-efficient code (heap allocation minimization, runtime profiling, buffer pre-allocation)
Mastery of Go paradigms including interfaces and generics to build modular, maintainable systems
Mandatory use of context for deadline management, timeouts, and structured cancellation
Experience with continuous deployment using GitHub Actions, Docker containers, and cloud infrastructure (AWS ECS, EC2, or equivalents)
Deep proficiency with Redis, OpenSearch (or similar), and SQL databases — including query optimization for performance and atomicity
Solid understanding of networking protocols, TLS, and firewalls, with practical application-level security experience
Proficiency with Git, CI/CD pipelines, automated testing, infrastructure monitoring, and observability practices
Portfolio of delivered production systems and/or open-source contributions
Strong communication and collaboration skills across engineering, product, and security operations teams
Comfort with zero-downtime deployment requirements and production incident response

About FusionHit

FusionHit

Software Development CompanyCosta Rica, Costa Rica51-200

Nearshore software development company in Costa Rica delivering AI software development, cloud systems, and scalable engineering across Latin America.