Expert Bazel Engineer

B2B20 000 - 25 000 PLN NET

START DATE as soon as possible

We foster a dynamic culture rooted in strong engineering, a sense of ownership, and transparency, empowering our team. As part of the expanding VirtusLab Group, we offer a compelling environment for those seeking to make a substantial impact in the software industry within a forward-thinking organization.

We are looking for Bazel engineers for several projects. Get to know what each project has to offer and what you would do in this position.

About the role

Each role has a specific set of skills that need to be available. Here is an overview of the skillset needed for our projects.

Bazel Expert

Python / Starlark Advanced

Gradle / Maven / CMake (any build tool other than Bazel) Advanced

another ecosystem (JVM / .Net / Rust / NPM, etc.) Nice to have

IDE internals / plugins (VS Code, IntelliJ, CLion and other JetBarins' IDEs) Nice to have

C++ Regular

English Advanced

View available projects

Project

Bazel-flow-expert

What you will do

Design and implement solutions within the Bazel ecosystem using Starlark, Golang, C++, and TypeScript
Research and develop tooling improvements for Bazel, including alternative rules and integrations
Collaborate with customers to deliver high-quality build automation services across diverse tech stacks
Maintain and improve CI/CD pipelines and support various stages of the software development lifecycle
Work closely with distributed teams across EU and USA, including Professional Services and Customer Success
Contribute to open-source initiatives and internal knowledge sharing through documentation or blog posts
Mentor teammates, share expertise, and support learning around Bazel and related technologies
Adapt quickly to new tools, languages, or ecosystems as project needs evolve

The project

The project supports a major provider of caching and remote build execution solutions by delivering advanced services around Bazel and build automation. It focuses on research and development within the Bazel ecosystem, including tooling improvements and cross-language integrations. The team also contributes to open-source efforts while solving complex challenges across evolving tech stacks.

Tech stack

Bazel, Starlark, Golang, C++, TypeScript, Gradle, Maven, CMake

Your future team

The team is a tight-knit group of 2 engineers, expanding to 3+, supported by a dedicated project manager. They collaborate closely with Professional Services, Customer Success, and Development teams across the EU and USA, bringing deep expertise in build systems and cross-ecosystem integrations

What we expect

Bring expert-level experience with Bazel and strong skills in Python or Starlark
Apply advanced knowledge of at least one other build tool such as Gradle, Maven, or CMake
Demonstrate solid understanding of at least one ecosystem like C++, JVM, .Net, Rust, Golang, or NPM
Communicate clearly and collaborate effectively within a distributed team
Take initiative in solving problems and managing tasks independently
Show flexibility when working across changing technologies and requirements
Contribute to a learning culture by mentoring others and sharing knowledge

Nice to have

Experience with IDE internals or plugin development for tools like VS Code or JetBrains IDEs
Interest in public speaking, writing technical content, or engaging with developer communities

Project

py-sphere-expert

What you will do

Design and build tools and libraries in Python to improve developer experience in a large Java/C++ monorepo
Lead the migration from Gradle to Bazel, ensuring smooth integration and performance optimization
Maintain and enhance CI/CD infrastructure using Jenkins, supporting scalable development workflows
Develop and support custom compilers, formatters, VS Code plugins, and web-based tooling integrated with Bitbucket
Debug complex issues across build systems and tooling with minimal external guidance
Collaborate with a distributed team across Europe and Asia to plan tasks and deliver high-quality solutions
Ensure tools are robust, low-maintenance, and easy for developers to adopt
Contribute to knowledge sharing through mentoring, documentation, or public communication when possible

The project

The project enhances developer productivity in a large-scale Java and C++ monorepo by building essential tools and libraries in Python. It supports hundreds of developers through custom compilers, formatters, CI/CD systems, and IDE plugins while driving a major migration from Gradle to Bazel for improved build performance and consistency.

Tech stack

Python, Bazel, C++, Java, Groovy, Gradle

Your future team

The team consists of experienced engineers distributed across Europe and Asia, collaborating closely under a UK-based project manager. They specialize in developer tooling and infrastructure, combining deep expertise in Python, Bazel, Java, and C++ to support large-scale monorepo development.

What we expect

Bring expert-level knowledge of Bazel and advanced experience with Python or Starlark
Apply strong skills in at least one other build tool such as Gradle, Maven, or CMake
Demonstrate practical experience with CI/CD systems and developer tooling across the SDLC
Show solid understanding of at least one major ecosystem like C++, JVM, .Net, Rust, Golang, or NPM
Communicate clearly and collaborate effectively within a distributed team
Take initiative to solve problems independently while knowing when to seek support
Manage tasks proactively and deliver high-quality results with minimal supervision

Nice to have

Experience working with IDE internals or plugins for tools like VS Code or JetBrains IDEs
Willingness to mentor others, write blog posts, or engage with the wider developer community

Project

Bazel Champion2

What you will do

Lead and support Bazel migration projects across various ecosystems
Develop open source and internal tools focused on Bazel, Starlark, and Python
Promote Bazel expertise through public speaking, blog posts, meetups, and social media
Provide consultancy and pre-sales support for clients adopting or scaling Bazel
Deliver training sessions and mentor developers on best practices with Bazel
Collaborate with a small expert team to drive innovation in build systems
Engage actively in developer communities such as Bazel Slack and technical forums
Balance multiple responsibilities across development, advocacy, and consulting work

The project

The project drives adoption and innovation around Bazel by leading migrations, building tools, and sharing expertise across developer communities. It blends consulting, development, and advocacy to support teams in modernizing their build systems and improving software delivery. The work spans open source contributions, client engagements, and internal tooling.

Tech stack

Bazel, Starlark, Python, Gradle, Maven, CMake, C++

Your future team

The team consists of two seasoned developer advocates who specialize in Bazel and build systems. They collaborate closely to deliver high-impact solutions, combining deep technical expertise with strong community engagement.

What we expect

Bring expert-level knowledge of Bazel and strong skills in Python or Starlark
Apply advanced experience with at least one other build tool such as Gradle, Maven, or CMake
Demonstrate practical understanding of CI/CD and software development lifecycle processes
Show hands-on experience in at least one ecosystem like C++, JVM, .Net, Rust, Golang, or NPM
Communicate clearly and work effectively within a collaborative team environment
Take initiative to solve problems independently and manage tasks proactively
Contribute to community engagement through public speaking, writing, or mentoring

Nice to have

Familiarity with IDE internals or plugin development for tools like VS Code or JetBrains IDEs
Experience working with multiple programming ecosystems beyond core expertise