About Smartly.City

We build secure, reliable IoT solutions that help cities run cleaner, safer, and more efficiently. We’re a small team that values logical thinking, ownership, and clear communication.

Role overview

As a Senior Embedded Software Engineer, you’ll design and ship firmware for our next-gen edge devices (ARM Cortex-M). You’ll work end-to-end - from board bring-up to Over-The-Air (OTA) updates in production - owning decisions and collaborating with hardware, cloud, and product.

What you’ll do

• Develop and maintain embedded software for resource-constrained devices (bare-metal/RTOS).
• Integrate wireless stacks (BLE, LoRaWAN, LTE) and IoT protocols (MQTT, CoAP).
• Build secure bootloaders and OTA update flows.
• Diagnose and resolve performance, stability, and connectivity issues using solid debugging practices.
• Write clear documentation and contribute to architectural decisions.

What we’re looking for

• 5+ years of experience in embedded software development.
• Strong low-level skills in ARM Cortex-M development in C.
• Exceptional problem solving skills.
• Hands-on experience with using laboratory equipment.
• Comfortable across bare-metal and RTOS.
• Communicative, decisive, and organized - able to frame trade-offs and move forward.
• Good command of English (written and spoken) for international collaboration.

Nice to have

• Practical experience with BLE / LoRaWan / LTE and MQTT or CoAP.
• Secure boot and OTA best practices.
• Python for tooling/tests; Rust-in-embedded exposure.
• Experience troubleshooting field issues.

What we offer

• Competitive salary in the range of 18,000–30,000 PLN (net + VAT).
• Annual bonus tied to sales of the devices we ship.
• Contract type: UoP or B2B — your choice.
• Remote-first work within EU time zones.
• Flexible PTO and working hours.
• Supportive, senior peers.
• Long-term cooperation and long-term projects.
• High autonomy with real influence on architecture and product direction.
• Lightweight process: docs over meetings, fast reviews.
• Opportunity to build meaningful products at city scale.

Hiring process

1. Intro chat (15-30 min) — mutual fit, role expectations, contract preference (UoP/B2B).
2. Technical deep dive (60–90 min) — systems, debugging, architecture/security, live coding task.
3. Offer — final decision.