Systems Engineer (Contract, LATAM)

The role

Junior Systems Engineers will develop and maintain systems-level components for the EOS AI gateway. You will work on request routing, concurrency, networking, streaming, and resource management.

What you will do

• Develop and maintain systems-level components powering EOS's AI gateway.
• Contribute to request routing, load balancing, and communication between different AI providers.
• Work on efficient request processing and streaming pipelines for AI model responses.
• Help implement rate limiting, usage tracking, and resource management features.
• Work with concurrency, asynchronous programming, networking, and I/O operations.
• Identify and help resolve performance bottlenecks in existing systems.
• Write efficient, reliable, and well-tested code.
• Collaborate with senior engineers to understand system architecture and implement technical solutions.
• Participate in code reviews, technical discussions, and engineering best practices.

Required qualifications

• 1–3 years of professional software engineering experience, ideally working with systems programming or backend development.
• Familiarity with Rust, C++, Go, or similar programming languages.
• Strong computer science fundamentals, including data structures, algorithms, and operating systems.
• Understanding of fundamental systems concepts such as memory management, concurrency, and asynchronous programming.
• Basic understanding of networking protocols such as TCP, HTTP, or WebSockets.
• Familiarity with performance optimization and an interest in understanding how software behaves under the hood.
• Strong problem-solving and analytical thinking skills.
• Ability to learn quickly, take ownership of assigned tasks, and work through challenging technical problems.
• Motivation to grow as a systems engineer and work on technically demanding infrastructure.
• Good communication skills in English, both spoken and written.

Nice to have

• Hands-on experience with Rust, C++, or Go.
• Familiarity with networking infrastructure, proxies, API gateways, or load balancers.
• Exposure to distributed systems or high-performance applications.
• Experience with profiling, benchmarking, or performance optimization.
• Familiarity with AI infrastructure, LLM integrations, or streaming APIs.
• Open-source contributions or personal projects involving systems programming.
• Competitive programming experience or participation in programming competitions such as ICPC.

About the company

Nexus is building the AI gateway for modern companies, providing access to leading AI models through a unified platform. The company is headquartered in San Francisco with a growing presence in Latam.