What You Will Do Daily:
- Develop next-gen features for Visual Studio: You will actively contribute to feature specifications and write high-quality C# code to bring them to life. You will dive deep into the Visual Studio Extensibility SDK, becoming the squad’s specialist in the Microsoft ecosystem to deliver software that feels snappy and native.
- Bridge the gap to our Core Engine: While your primary focus is C#, you will interact with our shared analysis engine (SLCore, written in Java). You will ensure the Visual Studio extension consumes this shared logic efficiently, collaborating with the team to expose new capabilities.
- Solve real engineering constraints: You will learn to build for "Zero Friction." You will write code that respects the user's memory and CPU, ensuring we never block the UI thread or slow down the developer's "inner loop."
- Implement the "AI Verification" UX: You will build the user interfaces (diff views, issue highlights, fixes) that guide developers when checking AI-generated code, helping turn "generated code" into "shippable code."
- Grow your craft in the Open Source world: You will review code from peers, engage with community feedback, and see your contributions used by millions of developers.
The Experience You Will Need:
- Solid C# Foundation & Quality Mindset: You have a strong grasp of C# and the .NET ecosystem. You combine software design principles with rigorous testing and code reviews to ship clean, modular code. You understand that "it works on my machine" isn't enough, it needs to work reliably for millions of users.
- Passion for Developer Tools: You are curious about how IDEs work. The idea of building tools for other developers (and "dogfooding" them yourself) excites you.
- Collaborative Product Mindset: You don't just "take tickets." You collaborate across functions (Product, Design, Security) and participate in technical design discussions to deliver the best possible solution. You are eager to learn from others and care about "Zero Friction," knowing that we succeed only when we deliver real value together.
- Alignment with the "Agentic" Future: You understand that the role of the IDE is changing. You are excited to help build the infrastructure that allows AI to be autonomous and safe.
Benefits of Working with Sonar:
- Pension Scheme: 1st Pillar (Unterstützungskasse): Automatic, financed by Sonar, 3% of gross salary, an additional benefit in addition to your salary.
- Pension Scheme:2nd Pillar (bAV): Voluntary, 15% contribution by Sonar from social security savings.
- We encourage usage of our robust time-off allocations with 28 PTO days for our employees based out of the Geneva region, plus additional days based on seniority and circumstances.
- Sonar recognizes holidays on working calendar days. If the holiday date occurs on a Saturday, we will recognize the day on the preceding Friday. If the holiday date occurs on a Sunday, we will recognize the day on the following Monday.
- Public transport reimbursement of 60% for annual subscription.
- Global workforce with employees in 20+ countries representing 35+ unique nationalities.
- We have an annual kick-off somewhere in the world where we meet to build relationships and goals for the company.
Top Skills
What the Team is Saying
What We Do
Sonar provides the essential verification layer for the AI-driven development era, ensuring all code—whether human-written or AI-generated—is code you can trust.
Today, AI coding tools are generating explosive volumes of code. This has created an "engineering productivity paradox" : faster code writing doesn't automatically lead to faster, safer software delivery. The new bottleneck is verification.
Sonar solves this. Integrating code quality and code security into a single platform (SonarQube), Sonar delivers deterministic, repeatable, and actionable code verification at scale, analyzing over 750 billion lines of code daily to ensure software is secure, reliable, and maintainable.
For organizations, Sonar provides the critical SDLC governance and compliance reporting needed to de-risk AI adoption and manage standards at scale. We empower teams to "vibe, then verify" — innovating at the speed of AI without sacrificing the quality, security, or maintainability of their codebase.
We are driven by a deep belief in our people, a commitment to excellence, and an unwavering dedication to delivery. We operate as a united group where our collective success is the sum of each individual's contributions. Our company culture is driven by the values of CODE: Committed, Obsessed, Deliberate & Effective. This mindset reflects our culture of creativity, collaboration, and pride in the work we do.
Rooted in the open source community, Sonar’s solutions support over 35 programming languages, frameworks, and infrastructure technologies. Today, Sonar is used by 7M+ developers worldwide, including Snowflake, Booking.com, Deutsche Bank, AstraZeneca, and Ford Motor Company.
Sonar is headquartered in Geneva, Switzerland with additional offices in Austin, Texas; Bochum, Germany; London, Singapore, and Tokyo. The company is rapidly growing with over 750 employees!
Join us in our mission to solve the trillion-dollar challenge of bad code!
Why Work With Us
We are a product-first company, with a people-first culture. Every employee has the opportunity to grow and learn. We promote from within, provide regular feedback and professional development opportunities, value the right to fail along with respect and kindness and work with team members to achieve their full potential.
Gallery
Sonar Offices
Hybrid Workspace
Employees engage in a combination of remote and on-site work.
At Sonar, we require employees to come into the office 3 days/week.
