BackEnd Software Engineer

Department: Engineering

Location: Warsaw

Employment Type: FullTime

What we do (and why it matters):

Swarmer develops software that makes drones autonomous and allows them to operate together, in large teams, without pilots required. Our technology has been battle-tested across 100,000+ combat missions in Ukraine — the world's most intense proving ground for drone warfare. We just closed a $15M Series A (the largest investment in Ukrainian defense tech since the war began) and we're scaling operations to serve NATO-aligned nations.

This isn't theoretical. This is software that's being used right now to save lives and defend democracy.

What we’re looking for:

We are looking for a Backend Software Engineer to design and build scalable backend systems that power our drone autonomy platform. This role blends backend service development, API design, and close collaboration with autonomy and platform teams to deliver reliable, high-performance systems.

What you’ll do:

• Design, implement, and maintain core backend services that enable autonomous drone behavior, mission execution, and system swarm coordination.

• Contribute to the architecture of scalable, high-performance software systems that manage real-time data, control flows, and swarm logic.

• Work with autonomy and robotics experts to translate algorithms into production-grade software components.

• Develop robust data handling pipelines to process telemetry, sensor input, and mission-critical information in real time.

• Design and implement APIs that expose core functionalities to internal tools, UIs, and other system components.

• Build/Integrate monitoring tools to ensure the reliability, safety, and correctness of the backend systems.

• Work closely with autonomy and frontend teams to ensure tight integration between software layers.

• Maintain clear technical documentation and follow best practices for code quality, version control, and deployment.

What you’ll get:

• Direct influence on product quality in a high-stakes defense tech environment where your decisions have real-world impact.

• Competitive salary and a comprehensive benefits package (insurance, paid sick leave, 20 paid days off per year).

• Flexible remote work options where possible.

How’s the hiring process going:

✔️Intro Call with TA Specialist → ✔️Technical Interview → ✔️Management Interview → ✔️Final interview → ✔️Offer

Please note that, as a leading defense tech company, we take operations security seriously and may need to perform additional background checks as part of our hiring process. We will do so in accordance with all applicable EU laws and regulations and safeguard your data in the process.

Why this matters (and why you should care):

Ukraine is deploying 5 million drones in 2025 alone. The US and NATO are paying attention. The future of defense isn't more pilots—it's smarter software. We're not selling PowerPoints; we're selling proven technology that's been refined under the most demanding conditions imaginable.

Our team is direct, moves fast, and doesn't waste time on performative nonsense. If you want a company with seven layers of approval and endless consensus-building, this isn't it. If you want to do the most important work of your career with people who say what they mean and execute, let's talk.

Ready to Apply?
If you’re excited about solving complex challenges and eager to contribute to the safety and security of Western-Democratic nations, please get in touch!