Backend Engineer



Software Engineering
Europe · Poland · Remote
Posted on Thursday, June 6, 2024

Codility is on a mission to unlock the world’s engineering potential.

As a Senior Backend Engineer, you will take an active role in shaping a product made for engineers by engineers to evaluate engineers.

We are a product-led company with a very experienced and talented engineering team that you can exchange with and learn from.

If you are driven by business impact and you love working on complex problems in a product that millions of people use, this is for you !

Location: Poland or Eastern Europe (100% remote)
We offer both B2B and employment contract options.

The team.

Our Enable pillar is working on core capabilities of our application, from user & account management to integrations, billing and payment systems. We are designing systems that can handle increasing loads of users and data without sacrificing performance or reliability. We work in an agile, value focused environment where we don’t just produce features for customers, but solve underlying problems.

You will work together with three other brilliant engineers on extracting authentication from our monolith to an external service on our journey to a fully distributed system.
This team has a high focus on flawless, reliable user experience as well as on code quality and simplicity.

They don't wait to find perfect solutions, but rather make bold decisions and take responsibility for them.

What you will do.

  • Writing reusable, testable, production ready, observable and efficient code using Python
  • Designing and implementing low-latency, high-availability, and performant applications
  • Testing what you code and contributing to how it runs, is deployed, and scaled
  • Integrating user-facing elements developed by front-end developers with server-side logic
  • Implementation of security and data protection by design
  • Integrating data storage solutions
  • Performance tuning, improvement, balancing, usability, automation
  • Collaborating with the Product, Research and Design Teams in order to understand end user requirements for the implementation of new software features

Who you are.

  • You have demonstrable experience as a Python Developer working for a Product-led/SaaS organisation
  • You are proficient in designing & developing Web Services (REST)
  • You have demonstrable exposure to working on B2B and B2C products
  • Good understanding of public cloud services and modes of operation (Preferably AWS), Django, Application Development and pushing products to the cloud
  • Strong familiarity with Architecture patterns
  • Strong understanding of modern software development best practices like Trunk Based Development, Continuous Delivery, TDD, etc.

We would love if you:

  • Have experience using AI assisted tooling for development (we're cooking some cool stuff at Codility ;)

Codility's Tech Stack.

  • Backend: Python 3.8, Django, FastAPI
  • Database: PostgreSQL, Redshift, DynamoDB
  • Continuous Deployment/Tools: Gitlab/GitlabCI
  • Infrastructure: AWS (especially ECS, Lambdas, API Gateways), Terraform, Prometheus stack

How we behave.

We're human. Our diversity and unique experience make us strong. We allow ourselves to be vulnerable and treat one another with grace. We take ownership. We expect one another to take initiative and trust each person to make decisions based on the best available data. We have passion, perseverance and urgency to hit our goals and work together to create the best outcomes. We think big. We innovate and challenge the status quo to maximize the value we deliver to our users. We constantly experiment with new ways to drive excellence. We're real. We are honest with ourselves and one another. We listen, speak up, and are ready to change our minds.


At Codility, we know that great work isn’t done without a phenomenal team. We are always looking to hire the absolute best talent and recognize that diversity in our experiences and backgrounds is what makes us stronger. We insist on an inclusive culture where everyone feels safe to contribute and help us innovate. We hire candidates of any race, color, ancestry, religion, national origin, sexual orientation, gender identity, age, marital or family status, disability, or veteran status. These differences are what enable us to work towards the future we envision for ourselves, our product, our customers, and our world.