April 30, 2026

Software Engineer (Backend)

Mid • Hybrid

14,000 - 18,000 PLN

Kraków, Poland

Software Engineer (Backend)

Join the team responsible for developing and maintaining Coiote DM – a scalable, microservices-based platform used to remotely manage millions of IoT devices worldwide.

Our system enables secure device provisioning, monitoring, firmware updates, and large-scale device lifecycle management. We work with modern backend technologies, cloud infrastructure, and distributed systems to ensure high performance, scalability, and reliability.

We are looking for a Regular Software Engineer (Backend) to join our team and help us build and evolve core backend services powering the platform.

Requirements:

  • Good understanding of at least one JVM language (Java or Scala)

  • Understanding of secure software development (authentication, authorization, data handling)

  • Knowledge of data storage and caching (e.g., MongoDB, Redis)

  • Writing clean, maintainable, production-grade backend code using modern AI assistance

  • Basic understanding of cloud-native environments (containers, CI/CD, Kubernetes)

  • English (B2+) and Polish (C2- we speak Polish on a daily basis)

A huge plus if you have:

  • Awareness of infrastructure (for eg. service discovery, networking, circuit breaking, retries, routing, K8s, VMs, CI/CD)

  • ISO/OSI model (basic networking knowledge)

  • Practical understanding of REST APIs, service integration patterns, event driven and distributed architectures

  • Using logs, metrics, traces, dashboards for debugging and analyses

Responsibilities:

  • Participate in the full software development lifecycle: design, development, code review, testing, deployment, and maintenance

  • Design and implement scalable and reliable service infrastructure

  • Build and improve deployment automation and CI/CD pipelines

  • Collaborate with product and customer-facing teams on technical analysis, PoCs, and custom adaptations

  • Support other engineers through code reviews, feedback, and mentoring (especially junior team members)

  • Contribute to improving engineering practices, technical standards, and system architecture

Work model:

  • Hybrid work model 

  • Mandatory onboarding period (first 3 months): at least 3 days per week in the office

What we offer:

  • Work on a large-scale IoT platform used globally

  • Real impact on architecture, performance, and product quality

  • Close collaboration with experienced engineers

  • Space for initiative and technical ownership

  • Opportunity to grow in backend, cloud, and distributed systems

  • Flexible working hours

  • Equipment of your choice (MacBook Pro / ThinkPad)

  • Team with strong engineering culture and a good sense of humor

  • Onsite gym and chillout space

  • Multisport card

  • Medical care

  • Kitchen full of snacks and treats (including Good Lood ice cream)

  • Car parking area and bike room

  • A relaxed work atmosphere – no dress code, no open space

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Warsaw, Poland

8,000 - 11,500 USD

🏢 Summary: Senior Backend Engineer role focused on building and scaling backend systems for an AI-driven product that transforms complex government data into actionable insights. The position involves designing data ingestion, processing pipelines, and distributed infrastructure from scratch, with full ownership from architecture to production. You will work closely with a small senior team to deliver scalable, production-ready systems. 🗂️ Requirements: 6+ years of Backend Engineering experience, Experience in JVM ecosystem, Experience in product companies (B2B SaaS preferred), Experience designing and owning backend systems in production, Strong knowledge of system design and scalability, Experience building asynchronous or distributed systems, Ability to make and justify technical decisions, Fluency in English, Valid work authorization in Europe or LATAM 📃 Skills: Kotlin, Java, JVM, SQL, GCP, Messaging, Queues, DistributedSystems, SystemDesign, DataPipelines, LLMs, AI 🏢 Description: About the role We’re looking for a Senior Backend Engineer to join our early team and help build our product from zero to one. You’ll work on a product that helps companies navigate complex government data, from contracts and grants to market signals and turn it into actionable insights using AI. On the backend side, this means working on data ingestion, processing, and the infrastructure that powers search and AI-driven workflows at scale. You’ll collaborate closely with a small, senior team and have real ownership, from shaping solutions to shipping them to production and improving them over time. You might be a fit if you: Must have: 6+ years of experience as a Backend Engineer, preferably in the JVM ecosystem (we use Kotlin on the backend) Experience working in product companies (B2B SaaS preferred) with direct impact on shipped features Experience working in small companies or startups would be a strong advantage Experience designing and owning backend systems in production (from initial design to deployment and ongoing improvements) Strong understanding of system design, including scalability, failure handling, and trade-offs Experience building asynchronous or distributed systems (e.g. messaging, queues, event-driven systems) Ability to make and justify technical decisions, not just implement given solutions Fluency in written and spoken English Nice to have: Experience with large-scale data processing, scraping, or data pipelines Experience working with LLMs / AI-related systems Experience with GCP or similar cloud environments How We Work Build Bridges to Help Customers Win - We pride ourselves on being obsessively customer-centric. Shooting Star Speed - We move with extreme speed. We value momentum, decisiveness, and the ability to accelerate when it matters. Fun Is a Feature - Fun is a Feature means we intentionally design Starbridge to be an energizing place to do hard work. Joy, humor, and camaraderie make great teams faster, sharper, and more resilient. In the Arena - We believe the best ideas come from living close to the work, feeling the friction, hearing the nuance, and experiencing the details firsthand. Benefits include: Competitive salary + early-stage equity Unlimited PTO Regular off-sites (NYC + global locations) Interview Process We move fast — really fast. Getting back to someone today beats tomorrow, and our interview process reflects that mindset. Please keep us posted on your timeline so we can move quickly and speed things up where needed. After submitting your application, the team reviews your CV and statement of exceptional work. If your application passes this stage, you will be invited to a 30-minute interview during which a member of our team will make sure you're a good fit for the role. You will have the opportunity ask questions and learn more about the role as well. We'll then send you a programming challenge that consists of two parts: LeetCode and SQL. Beyond that step, you will enter the main process, which consists of three interviews: System design exercise hands-on. Live coding in Java/Kotlin. Product thinking and past work. All interviews will be conducted via Google Meet. Eligibility to Work in Europe or LATAM: Candidates must hold valid authorization to work in the country where they will be based. At this time, we are unable to offer visa sponsorship or assist with work permit applications.