About Modular At Modular, we’re on a mission to revolutionize AI infrastructure by systematically rebuilding the AI software stack from the ground up. Our team, made up of industry leaders and experts, is building cutting-edge, modular infrastructure that simplifies AI development and deployment. By rethinking the complexities of AI systems, we’re empowering everyone to unlock AI’s full potential and tackle some of the world’s most pressing challenges.

If you’re passionate about shaping the future of AI and creating tools that make a real difference in people’s lives, we want you on our team. You can read about our culture and careers to understand how we work and what we value.

About The Role Mojo is our secret sauce, spell-book, and Mjolnir — a new programming language that blends the soul of Python with the raw, elemental power of C. It’s designed to unlock every ounce of performance from modern AI hardware, while still being human-friendly and beautifully expressive.

We’re searching for a compiler engineer who sees programming languages as both art and architecture. You’ll help design and evolve the Mojo compiler — a next-generation toolchain built on MLIR — and push the boundaries of what’s possible in heterogeneous compute and AI systems.

You won’t be maintaining legacy. You’ll be inventing the future. LOCATION: Candidates based in the US or Canada are welcome to apply. To support growth and collaboration, those in earlier career stages work in a hybrid capacity at our Los Altos, CA office (minimum 2 days per week on-site) with relocation assistance provided for out-of-state candidates. Senior members have both in office or remote flexibility. All new hires complete onboarding in-person.

What You Will Do

• Craft and implement new Mojo language features on top our MLIR-based compiler architecture.
• Dream up and realize optimization passes that make GPUs, CPUs, and accelerators sing in harmony.
• Shape the developer experience for Mojo — from syntax to performance semantics.
• Collaborate with the Modular core teams, researchers, and an emerging open-source community.
• Help define what "next-generation language design" means in the age of AI.

What You Bring To The Table

• 3+ years working on compilers, runtimes, or language implementations.
• Hands-on mastery of C++ (Python fluency a big plus).
• Familiarity with compiler development frameworks such MLIR and LLVM.
• Understanding of type systems, compiler optimization theory, and language semantics. (those who read the Pierce’s Types and Programming Languages, and can present a proof, will skip an interview)
• Contributions to Clang, GCC, Swift, Rust, Dart, or another real-world programming language implementation.

Helpful, But Not Required

• Experience with HPC or accelerator ecosystems (CUDA, SYCL, OpenCL, etc.).
• Experience working in type-system-heavy programming languages (Rust, Scala, Haskell).

What Modular Brings To The Table

• Amazing Team. We are a progressive and agile team with some of the industry’s best engineering and product leaders.
• World-class Benefits. In order to attract the best, we need to offer the best. Premier insurance plans, up to 5% 401k matching, flexible paid time off, and more are available to you! Please note that specific benefit packages may vary based on your location.
• Competitive Compensation. We offer very strong compensation packages, including stock options. We want people to be focused on their best work and believe in tailoring compensation plans to meet the needs of our workforce.
• Team Building Events. We organize regular team onsites and local meetups in Los Altos, CA as well as different cities. Traveling 2-4 times a year is expected for all roles.

Working at Modular will enable you to grow quickly as you work alongside incredibly motivated and talented people who have high standards, possess a growth mindset, and a purpose to truly change the world.

The estimated base salary range for this role to be performed in the US, regardless of the state, is $135,000.00 - $242,000.00 USD .

The estimated base salary range for this role to be performed in Canada, regardless of the province, is $130,000.00 - $237,000.00 CAD .

The salary for the successful applicant will depend on a variety of permissible, non-discriminatory job-related factors, which include but are not limited to education, training, work experience, business needs, or market demands. This range may be modified in the future. The total compensation for a candidate will also include annual target bonus, equity, and benefits, with equity making up a significant portion of your total compensation.

For candidates who fall outside of the listed requirements, we nevertheless encourage you to apply as we may have openings that are lower/higher level than the ones advertised.

Modular is proud to emphasize an equal opportunity, safe environment for people to do their best work. Modular is an affirmative action employer. We are committed to providing equal employment opportunities regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, or Veteran status. We also consider qualified applicants regardless of criminal histories, consistent with legal requirements. If you require reasonable accommodations to participate in the interview process, please let your recruiter know, and we will work with you to meet your needs in compliance with the ADA. This employer participates in E-Verify and will provide the federal government with your Form I-9 information to confirm that you are authorized to work in the U.S. If E-Verify cannot confirm that you are authorized to work, this employer is required to give you written instructions and an opportunity to contact Department of Homeland Security (DHS) or Social Security Administration (SSA) so you can begin to resolve the issue before the employer can take any action against you, including terminating your employment. Employers can only use E-Verify once you have accepted a job offer and completed the Form I-9.