Mercor

Spain

Mercor is hiring a Compiler Engineer on behalf of a leading AI lab. In this role, youll extend compiler frontends, IR passes, and backends to unlock new language features and improve performance across architectures. Youll deep-dive into code generation, vectorization, and link-time optimizations, ensuring that complex systems run efficiently and reliably. This position is ideal for candidates who enjoy working close to the metal and pushing the boundaries of compiler technology.Youre a great fit if you:Have a strong background in computer science, systems programming, or compiler engineering.Are proficient in C and C++, with hands-on experience in compiler development.Are skilled in frameworks like LLVM/Clang, GCC, and MLIR.Understand IR transformations, codegen, vectorization, and LTO.Are comfortable with build systems (Make, CMake) and debugging tools (ASAN/UBSAN, GDB, Valgrind).Care deeply about performance, correctness, and reliability at the systems level.Are curious about how compiler technology accelerates AI, scientific computing, and large-scale applications.Primary Goal of This RoleTo design and implement new compiler features and optimizations across frontends, IR, and backends, enabling faster, more reliable execution of cutting-edge applications.What Youll DoExtend compiler frontends, IR passes, and backends for new features and optimizations.Optimize code generation, vectorization, and link-time execution across architectures.Debug and validate compiler pipelines using ASAN/UBSAN, GDB, and Valgrind.Collaborate with researchers and engineers to adapt compilers for AI and high-performance workloads.Maintain build systems and workflows with Make/CMake.Ensure that compiler optimizations balance performance, correctness, and maintainability.Why This Role Is ExcitingYoull work at the core of systems and compiler innovation.Youll push the limits of performance and optimization across multiple targets.Youll collaborate at the intersection of AI research, HPC, and language design.Youll directly influence how large-scale systems run efficiently in production.Pay & Work StructureYoull be classified as an hourly contractor to Mercor.Paid weekly via Stripe Connect, based on hours logged.Part-time (2030 hrs/week) with flexible hourswork from anywhere, on your schedule.Weekly Bonus of $500$1000 USD per 5 tasks.Remote and flexible working style.We consider all qualified applicants without regard to legally protected characteristics and provide reasonable accommodations upon request.