Senior Software Engineer (C++/Rust)

About us

Bisly is a technology company on a mission to save our planet by making professional intelligent buildings mainstream, so we save energy and fight climate change through deployment of our digital twin-based building automation portfolio, consisting both of software systems and hardware products. We have achieved market leader position in our home market and are actively looking to replicate that in our target markets in Germany, UK and Baltics.

Your mission

As a Senior Software Engineer (C++/Rust), you’ll play a critical role in designing and building the fast, reliable backend services that power the Bisly platform, both in the cloud and on local infrastructure. You’ll work with low-level systems technologies like Rust and C++ to develop scalable, high-performance components, from networking stacks to data synchronization pipelines. You’ll take part in key architectural decisions, write clean, maintainable code, and help shape APIs that are efficient and easy to integrate with. In addition to contributing technically, you’ll participate in thoughtful code reviews and collaborate cross-functionally with hardware, product, and operations teams to ship impactful features in a fast-paced environment.

Key Responsibilities

Design, build, and maintain high-performance, scalable backend services in C++ (and increasingly, Rust).
Take technical ownership of projects, drawing from multiple years of experience in C++ development.
Contribute to architecture planning and design of modular, maintainable systems.
Develop and deploy robust software in cloud and local environments, ensuring reliability and performance.
Participate and take ownership in defining and implementing our data strategy.
Collaborate on data synchronization between cloud and local systems, focusing on efficiency and correctness.
Apply solid knowledge of software development principles—object-oriented design, design patterns, and Agile methodologies.
Optimize system performance and debug complex low-level issues related to memory, concurrency, and I/O.
Lead by example in writing clean, maintainable, and well-tested code
Engage in API design and development for both local and cloud-based services.
Contribute to team practices, mentoring, and engineering culture as we scale.

To succeed in this role, you'll have

4+ years of professional experience in backend or systems programming
Strong proficiency in one or more systems-level languages (e.g., Rust, C++, Go)
Solid understanding of distributed systems, network protocols, and asynchronous runtimes
Previous experience with different database engines (e.g. MariaDB, postgres, NoSQL)
Experience building and maintaining production-grade backend services
Familiarity with cloud infrastructure, data synchronization, and on-premise/local server environments
Proven ability to write clean, scalable, and well-tested code
Experience designing and consuming APIs (REST, gRPC, or similar)
Comfortable working in fast-moving, collaborative teams across multiple disciplines
Strong debugging skills and a pragmatic approach to problem-solving
Passion for improving engineering practices, reducing technical debt, and mentoring others

Why us?

At Bisly, we value talent, innovation,and collaboration. Here’s what you can expect when you join our team:

The chance to work on exciting projects and see your ideas come to life;
Flexible vacation time with additional birthday leave for your personal 'me time' to relax, explore or spend time with loved ones;
Book grant;
Health & Wellness compensation via Stebby;
Supportive work culture, with team-building events and activities.