Software Engineer 1 (Java/Kotlin)

About the job:

• Massive Scale: Design, build, and optimize systems that handle thousands of requests per minute. This is high-availability, high-performance engineering in practice.
  
  


• Modern Tech Stack: Work with a world-class, cloud-native environment. Our core technologies include Kotlin, Spring, Kafka, and Kubernetes. We're not shy when it comes to ML too :)
  
  


• True Ownership & Autonomy: We live by a "you build it, you run it" philosophy. You'll join an agile, autonomous team with full ownership of your microservices, from design to deployment.
  
  


• Complex Challenges: From distributed systems and data streaming to algorithmic optimization, you'll tackle the complex backend problems that power a massive, real-time marketplace.

Our team owns the quality of product content in Allegro's product catalog — names, descriptions, and the processes that keep them correct at scale. We build AI-driven pipelines (including LLM-based evaluation and generation) that automatically maintain content quality, and we run A/B experiments to prove when catalog data is ready to replace merchant-provided content on the buyer path.

We work in a cross-functional setup with backend engineers, a product manager, and close collaboration with data analysts and quality specialists.

Important things for you:

• Flexible working hours in the hybrid model (4/1) - working hours start between 7:00 a.m. and 10:00 a.m. We also have 30 days of occasional remote work.


• The salary range for this position depending on the skill set is as follows (contract of employment, tax-deductible cost):
  
  
  
  • PLN 11 200 - 15 250
  
  
  • Annual bonus based on your annual performance and company results.
  
  
  
  


• Our team is based in Toruń.

We are looking for people who:

• Code in Kotlin or Java;


• Expect work that has a deeper meaning (not only tasks "management has commissioned") and want to enjoy its results;


• Want to be proud of the code they create. They eagerly accept comments and share knowledge during code reviews;


• Can look for effective solutions to the requirements set by users;


• Want to constantly develop and update their knowledge;


• Are proactive and positive — you'll join people who actually like collaborating;


• Know English and Polish at at least B2 level.

What's in it for you:

• Well-located offices (with e.g. fully equipped kitchens, bicycle parking, terraces full of greenery) and excellent work tools (e.g., raised desks, ergonomic chairs, interactive conference rooms).


• A 16" or 14" MacBook Pro or corresponding Dell with Windows (if you don't like Macs) and all the necessary accessories.


• A wide selection of fringe benefits in a cafeteria plan - you choose what you like (e.g., medical, sports or lunch packages, insurance, purchase vouchers).


• English classes that we pay for related to the specific nature of your job.


• A training budget, inter-team tourism (see more here), hackathons, and an internal learning platform where you will find multiple trainings. 


• An additional day off for volunteering, which you can use alone, with a team, or with a larger group of people connected by a common goal. 


• Social events for Allegro people - Spin Kilometers, Family Day, Fat Thursday, Advent of Code, and many other occasions we enjoy.

And that's just the beginning! You can read more about the benefits here.

#goodtobehere means that:

• You will join a team you can count on - we work with top-class specialists who have knowledge- and experience-sharing in their DNA.


• You will love our level of autonomy in team organization, the space for continuous development, and the opportunity to try new things. You get to choose which technology solves the problem and you are responsible for what you create.


• You will value our Developer Experience and the full platform of tools and technologies that make creating software easier. We rely on an internal ecosystem based on self-service and widely used tools such as Kubernetes, Docker, Consul, GitHub, and GitHub Actions. Thanks to this, you can contribute to Allegro from your very first days on the job. 


• You will be equipped with modern AI tools to automate repetitive tasks, allowing you to focus on developing new services and refining existing ones (also leveraging AI support).


• You will create solutions that will be used (and loved!) by your friends, family and millions of our customers.


• You will meet the Allegro Scale, which starts with over 1000 microservices, an open-source data bus (Hermes) with 300K+ rps, a Service Mesh with 1M+ rps, tens of petabytes of data, and production-used machine learning. 


• You will become part of Allegro Tech - We speak at industry conferences, cooperate with tech communities, run our own blog (it's been over 10 years!), record podcasts, lead guilds, and we organize our own internal conference - the Allegro Tech Meeting. We create solutions we love (and can) to talk about! 

Send us your CV and… see you at Allegro!