Compiler Software Engineer

About Variant Security

Variant Security is securing the worlds critical fleets for the AI era. Today nearly every device runs identical software so a single exploit can cascade across an entire fleet of satellites drones vehicles and defense systems and AI has made finding that one exploit cheaper than ever. Variant breaks that pattern so compromising one device gives an attacker nothing against the rest and no single failure can bring down the fleet. AI made exploits cheap and we make them useless already protecting systems across aerospace defense and active conflict zones.

Role Summary

As a Compiler Engineer youll build and own the compiler technology at the core of Variants product turning cutting-edge diversification into something that ships. Youll work across two areas the compiler itself and the systems and tooling that run it at fleet scale with real ownership rather than narrow ticket work. Youll have a direct line to the founding team immediate impact on what customers run and room to grow from a strong early-career engineer into the owner of a core domain. Variant Security is securing the worlds critical fleets for the AI era. Today nearly every device runs identical software so a single exploit can cascade across an entire fleet of satellites drones vehicles and defense systems and AI has made finding that one exploit cheaper than ever. Variant breaks that pattern so compromising one device gives an attacker nothing against the rest and no single failure can bring down the fleet. AI made exploits cheap and we make them useless already protecting systems across aerospace defense and active conflict zones.

Tasks

• Develop and extend compiler passes that harden builds against exploitation
• Reverse engineer and analyze the generated binaries to validate transformations
• Measure security and performance impact across x86 AArch64 and RISC-V targets
• Build tooling in modern C and Python and integrate the compiler into CMake and customer CI/CD

Requirements

Must-haves:

• Masters degree or equivalent hands-on experience in cybersecurity or computer science
• Hands-on experience with binaries whether reverse engineering exploitation or vulnerability research
• Familiarity with Python and modern C
• Comfortable reading assembly and debugging low-level code on at least one of x86 AArch64 or RISC-V
• Self-organized and self-driven with strong personal initiative

Nice-to-haves:

• Prior work on compilers like Clang/LLVM or IR-level transformations
• Familiarity with binary analysis tooling such as Ghidra IDA or Binary Ninja
• Knowledge of exploit mitigations (ASLR CFI stack canaries DEP)
• CTF pwn or fuzzing experience (AFL libFuzzer)
• Low-level systems background spanning embedded firmware OS internals or ELF/PE formats linkers and loaders

Benefits

• Work on rare hard problems where compilers meet binary security the kind most engineers never get to touch
• Early-stage equity and competitive compensation on the ground floor
• Learn directly from a founding team with deep security compiler and space-systems pedigree (top-tier security research DARPA SpaceX)
• See your work protect real fleets across aerospace defense and active conflict zones
• Based in the Bochum office with regular collaboration across Germany and the U.S. and the chance to work from or visit the US team

Were looking for builders hackers and systems thinkers. If this sounds like you reach out to us.