Senior Software Engineer (Python)

We are looking for a skilled and technically driven Senior Software Engineer (Python) to join a fast-paced cybersecurity environment. You will own and evolve a critical layer of our software ecosystem — including microservices, security tool integrations, and an in-house Python library — that powers MDR operations for 100+ enterprise customers. This is a high-impact role with real ownership and a clear path into technical leadership.

The Ideal Candidate Has

• 6+ years of software engineering experience focused on Python

• Bachelor's degree in Computer Science or equivalent practical experience

• 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

Key Responsibilities

• Modernize multiple REST APIs and consolidate them into a unified microservices gateway

• Develop new and maintain existing connectors for ingesting logs from 50+ security tools (EDR platforms, firewalls, cloud services, SaaS applications)

• Maintain and enhance the in-house Python library used across the platform

• Build new applications to expand detection and response capabilities

• Serve as a critical technical resource for the Python codebase, leading design discussions and code reviews

• Mentor and guide junior and mid-level engineering team members

• Collaborate with cross-functional teams to design, build, test, and ship new features

Perks of Working at FusionHit

• Certified Great Place to Work, offering a supportive and inclusive culture.

• 100% Remote – work from anywhere in Latin America.

• Personal and Professional Development Courses & Certifications.

• Flexible Schedule.

• 3 Sick Days per year.

• Birthday Off.

• Extra Days for Special Occasions.

• Team Building Meal Reimbursement.

• Equipment Provided.

• Monthly Recognitions and Rewards.