Oferta pracy

Prosimy o zawarcie w aplikacji zgody o następującej treści: Wyrażam zgodę na przetwarzanie danych osobowych zawartych w mojej aplikacji przez relayr sp. z o.o. z siedzibą w Katowicach przy ulicy Uniwersyteckiej 20 na potrzeby przeprowadzenia procesu rekrutacji. Jeśli wyraża Pan/Pani również zgodę na przetwarzanie danych osobowych po zakończeniu procesu rekrutacyjnego na potrzeby przyszłych rekrutacji, prosimy również o dostarczenie drugiej zgody o następującej treści: Wyrażam zgodę na przetwarzanie danych osobowych zawartych w mojej aplikacji przez relayr sp. z o.o. z siedzibą w Katowicach przy ulicy Uniwersyteckiej 20 na potrzeby przyszłych procesów rekrutacji, w tym również na inne stanowiska.
relayr sp. z o.o.

Backend Engineer

relayr sp. z o.o.About the company

13 000‐18 000 zł gross / mth.
  • Uniwersytecka 20, Katowice
    Katowice, Silesian
  • Valid for 25 days
    until: 12 Feb 2021
  • Remote recruitment
  • Remote work
  • contract of employment
  • full-time
  • specialist (Mid / Regular), senior specialist (Senior)

relayr sp. z o.o.

Uniwersytecka 20


Technologies we use


  • SQL

  • NoSQL

  • RESTful API

  • JVM Platform

  • Backend Technologies

  • Willingness to learn Scala

  • PostgreSQL

  • Elasticsearch

  • Cassandra

  • Linux


  • Scala

  • Kafka

  • Spark

  • Flink

  • Kafka Streams

  • Docker

  • AWS

  • Kubernetes

  • Distributed Systems

  • JVM Programming Languages

  • Azure

Operating system

About the project

Currently, we are looking to hire a Backend Engineer in our Katowice office. You will join a cross-functional team of frontend, backend, and QA engineers. You will be responsible for developing IoT projects based on Microsoft Azure IoT services for our customers. You will build data streaming and storage infrastructure, services providing real business value, analytics workflows, and work on scalability and performance challenges. You will work with Azure Cloud services including but not limited to: IoTHub, Event Hub, Event Grid, Citus, Functions (serverless), Logic Apps, Digital Twins, Data Lake, Storage Account, Kubernetes.

We are looking for someone experienced in design and development of distributed cloud services with an understanding of performance, scalability, multithreading issues and desire to learn and experiment with new technology.

Your responsibilities

  • Design, develop, and maintain IoT software (microservices, lambdas, analytics jobs).

  • Take part in architectural and code reviews.

  • Help to design usable and clean APIs for our IoT services.

  • Collaborate with colleagues internationally in an Agile environment.

  • Guide other team members in handling more complex issues.

  • Evaluate new technologies, ideas and approaches.

  • Write unit, integration and system tests.

Our requirements

  • Profound knowledge of any backend technology and willingness to learn Scala

  • 3+ years of experience as a backend developer

  • Experience with server-side development, ideally on JVM platform

  • Experience with SQL and NoSQL databases (e.g. PostgreSQL, Cassandra, Elasticsearch, Redis)

  • Experience in building RESTful APIs

  • Working knowledge of Linux systems

  • Good understanding of multithreading concepts

  • Good command of English


  • Experience in Scala or other JVM programming language

  • Experience with distributed systems

  • Experience with Kafka or other messaging middleware

  • Experience with a data processing framework (such as Spark, Flink or Kafka Streams)

  • Experience with Docker, Kubernetes

  • Experience with cloud service providers (AWS, Azure)

Division of working time

New Feature


Bug Fixing


Client Support


Document Writing



This is how we organize our work

Team size

  • 4

This is how we work

  • in house
  • you can change the project
  • you have influence on the choice of tools and technologies
  • you have influence on the technological solutions applied
  • you have influence on the product
  • you develop the code "from scratch"
  • you focus on product development
  • you focus on code maintenance
  • agile

Team members

  • backend developer
  • frontend developer
  • technical leader
  • architect
  • devOps
  • automated test programmer
  • product owner
  • project manager
  • scrum master
  • UX designer
  • business analyst

This is how we work on a project

  • Clean Code

  • code review

  • design patterns

  • event modeling

  • architect / technical leader support

  • Continuous Deployment

  • Continuous Integration

  • DevOps

  • active monitoring

  • documentation

  • issue tracking tools

  • integration tests

  • test automation

  • testing environments

  • unit tests

  • manual tests

Development opportunities we offer

  • conferences abroad

  • conferences in Poland

  • development budget

  • external training

  • intracompany training

  • soft skills training

  • substantive support from technological leaders

  • support of IT events

  • technical knowledge exchange within the company

What we offer

  • Flexibility and safety are important to us! As a company we were quick to react when the Corona pandemic began, sending all our employees to work from home. If you start out as a new employee at relayr, you will be working from home, enjoy a structured digital onboarding programme and flexible working hours

  • Modern office located in Katowice city centre with a relaxation room, free coffee, snacks, and standing desks

  • Get exposed to international colleagues and customers from around the globe. Our working languages are Polish and English!

  • An extensive on-boarding period so you can get up to speed with the rest of the team

  • A learning environment where you can build upon your skills and interests, share knowledge, and attend events and conferences pertaining to your discipline. We also offer free English classes

  • Have some fun with regular get-togethers, including sports events, seasonal parties, international trips and meetings

  • Competitive salary

  • Benefits package, including private health care, life insurance, and fitness passes

  • Optional home office days

  • Choose between a Mac, Windows, or a Linux machine

  • Hands-on experience with cutting edge technology, space for research and exploration

  • We offer the ability to work with the newest tech-stack and the most talented engineers in IoT industry!

  • Benefits

  • sharing the costs of sports activities

  • private medical care

  • sharing the costs of foreign language classes

  • life insurance

  • remote work opportunities

  • integration events

  • coffee / tea

  • leisure zone

Recruitment stages

CV Screen


Screen Call with Recruiter


Technical Challenge


Team Interview


General Manager Interview

relayr sp. z o.o.

Relayr is the Industrial Internet of Things (IIoT) powerhouse delivering the most complete solution for risk-free digital transformations. Our unique value stack combines pioneering IIoT technologies with skilled delivery, exclusive financing, and risk-free insurance models.

We unleash data insights from existing equipment, machines and production lines to improve our customers’ business outcomes. With around 300 employees, we are a truly global family with locations in Germany, the USA, Poland, Italy, France, and the UK. Named twice the hottest start-up in Berlin by WIRED magazine and a winner of The Spark - the German Digital Award, relayr is now part of the Munich Re group.

The Polish research and development division of relayr is responsible for developing software for the IoT enterprise platform with all software designed, implemented, and tested in Katowice. We also provide support for the installation and maintenance of our software for clients across the globe.

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