Senior Software Developer – AI Systems & Data Platform

Ready to make your mark? Apply for the role and join our talented team.

Build systems that don’t just process data — they make decisions.

Most systems move data — we build systems that act on it.

You’ll work on AI-native systems that run in the real world, from logistics to safety-critical environments. These systems don’t live in dashboards. They run where failure, latency, and uncertainty are real constraints.

We bring together data from sensors, machines, enterprise systems, and real-time streams and turn it into operational intelligence.

The Role

This is not a feature development role.

You will design and build systems that need to work under imperfect data, unstable environments, and real-world constraints. You’ll make architectural decisions, build core infrastructure, and bring machine learning into production.

What You’ll Work On

• Designing distributed systems that remain reliable under real-world conditions
• Building data pipelines that operate at scale (batch, streaming, real-time)
• Turning machine learning models into production systems
• Integrating complex, heterogeneous data sources
• Deploying systems across cloud and on-prem environments

Problems You’ll Solve

• How do you make heterogeneous data consistent and usable?
• How do you run ML reliably in unpredictable environments?
• How do systems behave when networks fail, or data is incomplete?
• How do you move from analysis to autonomous decision-making?

If these questions interest you, this role will fit.

What We Look For

You’ve built systems that actually run.

• Strong backend engineering skills (Python)
• Experience with distributed systems or data platforms
• Experience with ML in production (not just training)
• You think in systems, not functions
• You care about reliability, performance, and simplicity
• You understand complex algorithms and ML models not just in application, but at a mathematical level

Bonus:

• C++ or Rust
• Experience with sensor data / IoT
• Experience in complex, real-world system environments

Why This Is Different

Most „AI jobs“:

• build models
• build dashboards
• stay theoretical

This role:

• builds operational systems
• operates in the real world
• must deal with real-world complexity

You’re not optimizing clicks. You’re building systems that operate in real environments.

How We Work

We are building a small, high-caliber engineering team.

• You own systems end-to-end
• You influence architecture and product decisions directly
• We move fast and iterate quickly

At the same time:

• We build for long-term reliability, not short-term output
• We prioritize impact over activity
• We expect ownership, not task execution

Low overhead, high responsibility, real impact.

Mindset

• You like hard problems
• You build systems that work, not just code that runs
• You take ownership
• You stay effective under uncertainty and pressure
• You care about what happens in production
• You don’t just write software. You build systems that matter.

What You Get at Novarto

Ownership of systems that matter. Direct influence on architecture and product direction. A small, high-caliber team where your decisions have real consequences.

On top of that: individual training and conference budget, 25 days paid leave, flexible hours and remote work options, medical care insurance, Multisport card, team events, and a modern Sofia office.

Ready to Apply?

Send your CV in English. All applications are treated strictly confidentially. Only shortlisted candidates will be contacted.