Software Engineer 2 (Java / Kotlin) - Basket Building
Confirmed on the employer's own hiring board on Sep 29, 2026. First seen by Alion on Sep 25, 2026.
About the Job:
Allegro is home to 1,700+ tech experts, but our team? We are the driving force behind the Basket Building domain. We are designing and developing innovative solutions that help customers discover and easily use the best discounts during their shopping journey.
We are not just building standard features. We are inventing and creating a complex solution that hiper-personalizes offers for our buyers. By collaborating closely with ML specialists, we are building a tool that analyzes user preferences and cart contents in real-time to select the most relevant and attractive discounts, ensuring our customers always get the most value out of their shopping. If you love conceptual, greenfield work, want to leverage AI in your daily tasks, and prefer building from scratch over maintaining legacy code, you’re in the right place.
The Role
We are looking for a Software Engineer with a strong background in Kotlin and backend architecture who is also eager to grow and expand their skills.
You will join a cross-functional team (backend, frontend, mobile) working on the shopping journey and cart experience. While your core focus will be on the backend, your willingness to bridge the gap to the frontend will be highly valued as we build these tools from the ground up and collaborate closely with our ML experts.
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 14 200 - 20 200
Annual bonus based on your annual performance and company results.
Our team is based in Poznań.
We are looking for people who:
Have a strong background coding in Kotlin (and backend architectures) and are willing to expand their scope by actively learning and writing code in TypeScript and React.
Want to build tools that directly personalize the shopping experience, ensuring millions of users can seamlessly access the best deals and promos tailored to them.
Enjoy conceptual work and building things from scratch, preferring to design new architectures and solutions over maintaining legacy systems.
Can collaborate effectively with ML experts to build complex tools that analyze historical data and shopping carts in real-time to make dynamic decisions.
Enjoy working in a diverse, cross-area team (backend, frontend, mobile) to deliver cohesive, end-to-end solutions.
Know English and Polish at a communicative level (at least B2) and are comfortable collaborating in a distributed team environment.
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 benefitshere.
#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!