Senior Backend Developer

About Us

OfficeRnD has one mission: making flexible and hybrid working the norm, rather than an option. We started building our SaaS platform back in 2015 to support the future of work. We believe that offering freedom and flexibility is the key to providing a better workspace experience — and that's what enables us to develop products that matter, for our customers and the world.

The company has offices in Bulgaria, the USA, the UK, and Australia, and our teammates are the ones getting us to the top in our market niche.

If you're passionate about technology, come and join us!

About the Role

We're seeking a Senior Backend Developer to join our Bulgaria-based engineering team. You'll be part of the Operations Hub - the team responsible for the core business logic powering OfficeRnD's Flex product. This is a backend-heavy role where you'll design and build the systems that thousands of flexible workspace operators depend on every day. 

Front-end work exists but is not the focus. What matters here is deep backend thinking, clean API design, and the ability to operate confidently in a complex, business-logic-rich environment while contributing to reliable software delivered in fast iterations. If you're a backend engineer who is genuinely curious about expanding your skills across the full stack over time, this is a strong fit.

What You'll Do

Design, build, and maintain scalable backend services and APIs that power core workspace management workflows, ensuring consistency, performance, and correctness.

Own MongoDB schema design and query optimisation for complex, high-volume data models.

Collaborate with Product Managers, Software Architects, and engineers to translate business requirements into robust technical solutions.

Own and lead backend-focused strategic initiatives and architectural improvements.

Debug and resolve production issues across the backend stack and infrastructure layer.

Review peer code with a focus on correctness, performance, and maintainability.

Write unit and integration tests; collaborate with the QA team thatwho owns API and end-to-end test coverage.

Mentor junior engineers on backend fundamentals and system design.

Contribute to scalable, reliable, and maintainable system architecture. 

What to Bring

Experience:

At least 5 years of backend development experience, ideally within cloud-based environments.

Proficiency in at least one server-side technology (Node.js, Java, or .NET).

Experience with databases and schema design (MongoDB a plus).

Experience designing and working with APIs and distributed systems.Experience building and running production systems.

Experience with Cloud Computing platforms (e.g., Amazon AWS, Microsoft Azure, Google Cloud Platform).

 Extensive knowledge of software design principles - you default to clean architecture, separation of concerns, and domain modelling.

Mindset:

Strong ownership mindset – you take responsibility and consistently deliver reliable, well-thought-through solutions

Product-oriented thinking – you build with long-term maintainability, scalability, and user impact in mind

Continuous learning mindset and willingness to grow together with the team – actively developing your skills while contributing to the team’s collective knowledge

Proactive and collaborative approach to problem-solving – you identify challenges early, communicate clearly, and work effectively with others to find solutions

Commitment to quality, efficiency, and continuous improvement

What We Offer

Premium health insurance, including dental coverage

25 days of annual paid leave

An additional day off to celebrate your birthday

3 paid volunteering days per year

Full compensation for the first 3 days of sick leave

Hybrid work model (minimum 40% of monthly working time onsite)

Co-funded sports card to support your active lifestyle

Learning and development opportunities

Regular team events and celebrations to foster connection and collaboration

If this sounds like the right opportunity for you, we'd love to talk!