Senior Software Developer - Qiskit

IntroductionQiskit is IBM Quantum’s flagship open‑source software development kit for quantum computing, enabling the development, compilation, and execution of quantum programs for a broad community of researchers, developers and industry partners. As part of IBM Quantum, the Qiskit SDK team is building the foundations of a high‑performance, open, and platform‑neutral quantum compiler and SDK, with the long‑term vision of becoming the standard library and toolchain for quantum computing. Qiskit emphasizes production‑grade quality and performance, offering a platform with Python and C APIs and a design that accommodates future language bindings.Your Role And ResponsibilitiesWe are looking for an experienced Software Developer to join the core Qiskit SDK team. In this role, you will work at the intersection of systems programming, compiler infrastructure, and open‑source development, contributing to software that shapes the future of quantum computing. You will be a core contributor to the Qiskit SDK and its underlying compiler and runtime infrastructure, designing and implementing performance‑critical components, evolving public APIs, and collaborating closely with researchers, product teams and the open‑source community. The role requires a strong sense of software ownership, technical rigor, and open‑source best practices.Key ResponsibilitiesDesign, implement, and maintain core Qiskit SDK components and APIs. Develop high‑quality, well‑tested, performance‑critical code, with strong attention to usability, extensibility, and backward compatibility. Contribute to compiler and transpilation infrastructure, including IRs, optimization passes, and compilation pipelines. Review and mentor contributions from internal engineers and external open‑source contributors. Participate actively in open‑source workflows, including design discussions, code reviews, documentation, and releases. Collaborate closely with research, HPC, hardware, and product teams, and support external users and partners. Debug and resolve complex issues across a large, evolving codebase. Preferred EducationDoctorate DegreeRequired Technical And Professional ExpertiseStrong proficiency in Rust and Python, with demonstrated experience building and maintaining performance‑critical systems.Deep experience designing, building, or maintaining compiler frameworks or complex compilation pipelines.Strong understanding of compiler architecture, including IRs, optimization passes and compilation pipelinesSignificant experience contributing to or maintaining large open‑source projects, including active participation in design discussions and reviews.Preferred Technical And Professional ExperienceHands‑on experience with LLVM, MLIR, or similar compiler infrastructures. Experience designing custom IRs or domain‑specific compilation workflows. Strong familiarity with quantum compiler concepts, such as circuit representations, compilation, optimization, or synthesis.