Software Engineer 1 .NET Core System

Allegro Sp. z o.o. WARSZAWA 2026-08-27

We are looking for people who:

  • Have experience in .NET backend development
  • Have practical experience working with SQL databases, specifically PostgreSQL
  • Are eager to understand the broader business context and communicate effectively with internal clients
  • Demonstrate a high sense of responsibility and resilience, as you will be working with critical financial data
  • Are open to actively utilizing AI tools (such as GitHub Copilot) to optimize their daily coding tasks
  • Value independence and are ready to take ownership of the features they deliver from start to finish
  • Are committed to continuous learning, open to constructive feedback, and willing to continuously improve their skills and ways of working
  • Collaborate effectively within a team, share knowledge, and contribute to a supportive engineering culture
  • Speak fluent Polish (essential for daily communication with business stakeholders) and communicative English (at least B2 level)

About the job:

Allegro Pay is Central Europe’s largest and fastest growing fintech – the only place where financial solutions can be created on such a large scale, using state-of-the-art technology. We work on purchase financing and payment methods that are used daily by customers of Allegro, the most popular shopping platform in Poland and one of the largest e-commerce companies in Europe. Due to this scale, we have the opportunity to work on one of the most exciting purchase financing and payment solutions in our country. We are looking for talented people who want to create powerful and stable solutions to support a product with over a dozen million active users.

We are looking for a Software Engineer with a solid foundation in .NET and backend development to join a team responsible for our core financial system - the absolute source of truth for customer and loan data. Your focus will be on improving system performance, scalability, and reliability, while designing and delivering new capabilities and continuously raising the quality and maintainability of the codebase. You will also work closely with internal business stakeholders, such as Accounting and Controlling teams, to understand their needs and translate them into robust technical

Important things for you:

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

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, 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.

#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!


,[] Requirements: .NET, SQL Additionally: Sport subscription, Private healthcare, Training budget, Small teams, Free coffee, Bike parking, Free beverages, Mobile phone, Modern office, English classes, Canteen, Playroom, Shower, In-house trainings, No dress code.