Senior Software Engineer at FusionHit

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

Description

Join FusionHit as a Senior Software Engineer (Python) to lead and develop critical layers of the software ecosystem, focusing on microservices, security tool integrations, and an in-house Python library. This role involves owning and evolving the software to power MDR operations for enterprise customers, requiring strong technical leadership and a clear career path.

Required Skills

Python
Microservices
FastAPI
Asyncio
Redis
OpenSearch
SQL Databases
Networking Protocols
TLS
Firewalls
Git
CI/CD Pipelines
Automated Testing
Infrastructure Monitoring
Observability

Additional Information

Required Previous Experiences: 6+ years of software engineering experience focused on Python
Preferred Qualifications: Idiomatic fluency in Python, including deep familiarity with the standard library and package ecosystem
Expertise in object-oriented programming — classes, inheritance, and encapsulation
Experience building web APIs using modern Python frameworks such as FastAPI
Mastery of asyncio and asynchronous patterns for building non-blocking, scalable services
Proficiency with generators, iterators, decorators, and context managers
Solid understanding of the Global Interpreter Lock (GIL) and PEP 8 style guide
Strong testing practices using pytest or unittest
Experience with continuous deployment using GitHub Actions, Docker, and AWS (ECS or EC2)
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 and CI/CD pipelines, automated testing, infrastructure monitoring, and observability
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.