Rust Systems Developer (SDK, Mobile & Routers)
Cooperflora · São Paulo, Brazil ·
- Category
- Software engineering
- Experience
- 3+ years
Builds and optimizes a cross-platform Rust library that routes and accelerates player connections to game servers via SDK, mobile, and router integrations.
Job Purpose
ExitLag is looking for a Rust Systems Developer to work at the heart of our technology: libexitlag-rs, the library responsible for optimizing the connection between players and game servers.
You’ll be working with a single codebase running on multiple platforms, SDK (Windows/macOS), mobile (Android/iOS), and routers (OpenWrt).
If you enjoy asynchronous Rust, networking, and high-performance systems, this position is for you.
What you’ll be doing
- Work on the core of our network pipeline (proxy, routing, and traffic optimization)
- Develop integrations for SDK (Windows/macOS), Mobile (Android and iOS), Routers (OpenWrt / ARM / MIPS)
- Work on performance, latency, and reliability
- Work on cross-platform projects (from the core to integrations via FFI)
- Contribute to continuous improvements in architecture and builds
Main Stack
- Rust (async with Tokio)
- Networking (TCP/UDP, TUN/TAP, SOCKS, Netfilter, WFP)
- FFI (JNI, C API, bindgen)
- Protobuf, SQLite
- CI/CD and cross-compilation
Essential requirements
- Experience with Rust in production (3+ years)
- Experience with systems and network programming
- Experience with FFI (JNI, C bindings, or similar)
- Experience with cross-compilationStrong debugging skills (multi-platform / network)
Preferred
- Experience with Android, iOS, Windows, or OpenWrt
- Knowledge of VPNs, proxies, or gaming networking
- System performance and optimization
- English and/or Portuguese for technical communication
Benefits
- Paid vacation: 30 days after 12 months of employment, with the option to sell up to 10 days.
- Annual bonus (13th month): equivalent to 1 additional month’s salary, paid proportionally based on length of service.
- Performance bonus (In-Company Goal): potential for up to 5x additional monthly salaries per year, based on goal achievement.
- Stock Options: eligibility after 6 months of employment, 4‑year vesting period.
- Flash Card: R$ 1,200.00/month with flexible use (food, home office, bills, or as preferred)
- Birthday Day Off: a day off to celebrate however you like.
- Bradesco Health Plan: 100% covered by the company for the primary beneficiary (initially).
- Wellness partnerships: access to Zenklub (emotional health) and TotalPass (gyms and physical activities).
- Educational subsidy: up to 50% coverage for courses and specialized training (after 6 months with the company).
- Unlimited ExitLag license: full access to our premium product.