Toolchain Engineer

Kalray; Montbonnot-Saint-Martin; Remote; EUR 90,000 - 120,000; Full time

Benefits offered by this job

RSU

Paid leave RTT

Mobility incentives

Paternity leave

Team events

Job summary

Kalray in Montbonnot-Saint-Martin, France, is seeking a senior Toolchain Engineer to join the Toolchain team. You will design, integrate, and optimize the software development ecosystem for Kalray’s IPs, leveraging GCC, LLVM, and open-source tools to empower developers.

Join a fast-paced, international deep-tech environment where hardware and software intersect, collaborate with cross-functional teams, and contribute to high-quality toolchains, runtimes, and build systems enabling efficient

Qualifications

• Significant experience in software toolchains, including compilers, linkers, debuggers, runtimes, libraries, build systems, and packaging tools.
• Strong experience with Linux software development environments and systems programming in C/C++.
• Strong understanding of compiler internals, code generation, runtimes, and toolchain architectures.
• Proven experience with cross-compilation environments, embedded systems, or heterogeneous computing platforms.
• Familiarity with processor architectures and low-level software concepts.
• Excellent debugging, performance analysis, and problem-solving skills.
• Experience with CI/CD systems, automated testing, and software release processes.

Responsibilities

• Collaborate proactively with Hardware and Software teams to define, integrate, package, and maintain toolchain components that improve developer productivity and user experience
• Develop, debug, test, and optimize various toolchain components, including runtimes, libraries, debuggers, SDKs, build systems, profiling tools, and supporting infrastructure within large-scale Linux-based environments
• Integrate and maintain technologies based on open-source ecosystems such as GCC, LLVM, binutils, GDB, and related projects, ensuring seamless operation across Kalray platforms.
• Design and improve build, packaging, deployment, and CI/CD workflows that enable efficient development, validation, and delivery of software toolchains.
• Work closely with architecture, firmware, runtime, and application teams to ensure coherent integration of all software development tools and libraries.
• Review peer code and promote high engineering standards, maintainability, automation, and software quality across the project.
• Provide technical guidance on toolchain architecture, software integration, and development best practices.
• Participate in architecture discussions and help drive technical decisions related to developer tools, software infrastructure, and platform enablement.
• Contribute to open-source communities where appropriate and stay current with advancements in toolchain technologies, software development infrastructure, and developer experience.

Skills

Toolchains

C/C++

Linux development

Compiler internals

Cross-compilation

Open source

CI/CD

Education

MSc or BAC+5 in CS/CE

Tools

GCC

LLVM

binutils

GDB

CMake

Job description

Kalray is a European leader in hardware acceleration, with full-stack acceleration expertise: from silicon to complete system.

Our MPPA® (Massively Parallel Processor Array) architecture is the foundation of Kalray’s processor (30+ patent families, 15+ years of development) and acceleration cards that combine processing power, flexibility, and energy efficiency.

Our mission is to deliver open data-efficient hardware accelerators to power next generation of data-intensive, AI-driven systems and infrastructures. We offer off-the-shelf processors, acceleration cards, and specialized processor development.

With over 130 employees and presence in France and Romania, Kalray is backed by top-tier investors and publicly listed on Euronext Growth. You’ll be part of a pioneering team that is shaping the future of computing with cutting-edge processor architecture, software-defined solutions, and next-generation acceleration platforms.

We offer a fast-paced, inclusive, and collaborative environment where ambitious experienced professionals and young talents can thrive—while enjoying the positive and inspiring lanscape of the Alps or the Côte d’Azur. You can learn more about us on our website, follow us on LinkedIn.

As a Toolchain Engineer within Kalray’s Toolchain team, you will play a key role in developing, integrating, and maintaining the technologies that enable developers to fully leverage our innovative processor architectures.

You will contribute to the design, implementation, integration, and optimization of the complete software development ecosystem, including compilers, runtimes, libraries, debuggers, build systems, SDKs, profiling tools, and developer workflows, building upon leading open-source technologies such as GCC, LLVM, binutils, GDB, CMake, and related projects.

Working at the intersection of hardware and software, you will collaborate closely with cross-functional teams to deliver robust, high-performance, and user-friendly development environments that accelerate application development on Kalray IPs.

Your main responsibilities will include:

• Collaborate proactively with Hardware and Software teams to define, integrate, package, and maintain toolchain components that improve developer productivity and user experience
• Develop, debug, test, and optimize various toolchain components, including runtimes, libraries, debuggers, SDKs, build systems, profiling tools, and supporting infrastructure within large-scale Linux-based environments
• Integrate and maintain technologies based on open-source ecosystems such as GCC, LLVM, binutils, GDB, and related projects, ensuring seamless operation across Kalray platforms.
• Design and improve build, packaging, deployment, and CI/CD workflows that enable efficient development, validation, and delivery of software toolchains.
• Work closely with architecture, firmware, runtime, and application teams to ensure coherent integration of all software development tools and libraries.
• Review peer code and promote high engineering standards, maintainability, automation, and software quality across the project.
• Provide technical guidance on toolchain architecture, software integration, and development best practices.
• Participate in architecture discussions and help drive technical decisions related to developer tools, software infrastructure, and platform enablement.
• Contribute to open-source communities where appropriate and stay current with advancements in toolchain technologies, software development infrastructure, and developer experience.

WHAT WE ARE LOOKING FOR:

Technical skills:

• Significant experience in software toolchains, including compilers, linkers, debuggers, runtimes, libraries, build systems, and packaging tools.
• Strong experience with Linux software development environments and systems programming in C/C++.
• Strong understanding of compiler internals, code generation, runtimes, and toolchain architectures.
• Proven experience with cross-compilation environments, embedded systems, or heterogeneous computing platforms.
• Familiarity with processor architectures and low-level software concepts.
• Excellent debugging, performance analysis, and problem-solving skills.
• Experience with CI/CD systems, automated testing, and software release processes.

Profile:

• MSc or Engineering degree (BAC+5) in Computer Science, Computer Engineering, Embedded Systems or related field.
• 8+ years of experience in compiler development, toolchain engineering or low-level software development.
• Ability to work effectively both independently and within cross-functional teams.
• Strong communication and collaboration skills.
• Strong ownership mindset and autonomy, with the ability to drive complex technical topics from design to implementation.
• Rigorous approach to software quality, maintainability and engineering best practices.
• Passion for compiler technologies, open-source software and continuous learning.
• Comfortable working in an international, fast-evolving deep-tech environment.

Of course, you might not have all of those required skills! But feel free to apply anyway and explain to us why you believe you are the right person for the job.

CONTRACT INFORMATION:

• Type of contract: Permanent contract
• Starting date: As soon as possible
• Location: Montbonnot(38)

WHAT WE CAN OFFER YOU:

• Competitive salary & performance-based RSU (free shares)
• Additional paid leave (RTT)
• Sustainable mobility incentives
• Generous paternity leave
• Monthly team activities (laser game, hiking, sailing, karaoke …) and large-scale company events

RECRUITMENT PROCESS:

• First interview with the line manager
• Second technical interview with the team
• Final interview with HRD or CEO

Equal Opportunity Statement

KALRAY is committed to creating a diverse and inclusive environment, and we welcome applications from individuals of all backgrounds, identities, and experiences. We do not discriminate (including in our hiring and promotion practices) on the basis of race, religion, skin color, national origin, gender, sexual orientation, age, marital status, disability status, or any other characteristic protected by law. Should you require any accommodations or adjustments throughout the interview process and beyond, please do not hesitate to let us know. We are committed to ensuring that all candidates have an equal opportunity to showcase their abilities and succeed in our organization.