Senior Backend Software Engineer (Python)
WELCOME TO OLX
At OLX, we work together to build a more sustainable world through trade.
We make it safe, smart, and convenient to buy and sell cars, find housing, get jobs, buy and sell household goods, and more. Our colleagues around the world help to serve millions of people around the world every month, through its well-loved consumer brands including OLX, Otodom, Property24.
Join OLX and see how far you can go.
We are looking for a Senior Software Engineer with Python expertise to join our engineering team. We design, build, and run the internal data platforms that keep the company moving. Our systems power the metrics, experiments, and tools that every OLX team uses to make decisions.
Here are some of the practical projects we drive:
Tracking ecosystem: we handle the flow of tracking data from millions of users across many countries. This data is the backbone of the company’s main metrics and helps everyone make informed decisions.
Change Data Capture service: we built our own CDC system to capture and replicate database changes in near real-time. It keeps data fresh and consistent wherever it’s needed.
Experimentation platform: we run the in-house A/B testing and feature flag system. It supports 40+ experiments every month, helping teams test ideas and improve the product.
Console: we maintain the internal self-service platform that brings together UI and backend tools in one place, so employees can easily access and manage data products and internal systems.
We’re an experienced team that takes ownership from design to release. We keep quality high but stay pragmatic: we help each other out, share knowledge openly, and raise issues early to keep things moving. We value different perspectives and believe the best solutions come from open discussion and collaboration. If you like working on systems that matter, in a team that trusts each other and values both skill and teamwork, you’ll feel at home here.
About you:
A product-minded engineer who thinks from a user perspective, understanding both the how and why behind technical solutions.
Engineer with deep knowledge of programming languages (we use mostly Python), frameworks (Flask, FastAPI), and best practices, with strong mastery of data structures, algorithms, and software architecture to build and scale cloud-based systems.
A problem solver who can break down complex challenges into manageable solutions using both analytical thinking and creativity.
An effective communicator who can explain technical concepts to both technical and non-technical stakeholders while documenting technical specifications and processes clearly.
A developer who believes in 'you build it, you run it, you own it,' ensuring high-quality code, debugging, optimization, and automation as key priorities.
What you will be doing:
Contributing to complex technical projects, ensuring robust, secure, and scalable software solutions.
Mentoring and guiding junior engineers, fostering a collaborative and productive work environment. This includes delegating tasks, providing feedback, and facilitating team communication.
Driving innovation by encouraging new ideas, shaping software development, and collaborating closely with product management to create user-centric solutions.
Creating impact outside of your team by helping drive the Engineering strategy and contributing to cross-team collaboration through inter-team working groups or community guilds, among others.
Our hiring process:
Recruiter Interview
People Manager Interview
Live Coding
System Design
Our benefits:
Monthly salary and an annual bonus (15%)
Training and conference budget and free access to Udemy courses
A benefits package with 300 points on the Mybenefit platform per month, private medical care provided by Luxmed, Ask Henry services, and much more
IP rights’ costs
100% remote work (as well as the possibility of working from our offices in Poznan and Warsaw)
Diversity, Equity and Inclusion at OLX
OLX values diversity and welcomes applicants of all races, ethnicities, disabilities, ages, genders, sexual orientations, religions, backgrounds, and experiences to apply. If this role excites you, we encourage you to apply, even if you don’t meet all the requirements - you may be just the right fit for this or other opportunities with us!
OLX will process your personal data to assess your fit for the applied position. You may optionally consent to store your data for up to 12 months after the application process for consideration in future OLX roles. For more details on how your application data will be processed please check our Privacy Statement.
Grupa OLX sp. z o.o. has implemented an internal procedure for reporting violations of the law. You have the right to report a violation of the law via website or by phone using any of the phone numbers listed on this site. The verification of reports and the undertaking of follow-up actions are handled by authorized members of the ethics and compliance team. All reports will be treated with the utmost care, confidentiality and in accordance with applicable law.
About the job
Apply for this position
Senior Backend Software Engineer (Python)
WELCOME TO OLX
At OLX, we work together to build a more sustainable world through trade.
We make it safe, smart, and convenient to buy and sell cars, find housing, get jobs, buy and sell household goods, and more. Our colleagues around the world help to serve millions of people around the world every month, through its well-loved consumer brands including OLX, Otodom, Property24.
Join OLX and see how far you can go.
We are looking for a Senior Software Engineer with Python expertise to join our engineering team. We design, build, and run the internal data platforms that keep the company moving. Our systems power the metrics, experiments, and tools that every OLX team uses to make decisions.
Here are some of the practical projects we drive:
Tracking ecosystem: we handle the flow of tracking data from millions of users across many countries. This data is the backbone of the company’s main metrics and helps everyone make informed decisions.
Change Data Capture service: we built our own CDC system to capture and replicate database changes in near real-time. It keeps data fresh and consistent wherever it’s needed.
Experimentation platform: we run the in-house A/B testing and feature flag system. It supports 40+ experiments every month, helping teams test ideas and improve the product.
Console: we maintain the internal self-service platform that brings together UI and backend tools in one place, so employees can easily access and manage data products and internal systems.
We’re an experienced team that takes ownership from design to release. We keep quality high but stay pragmatic: we help each other out, share knowledge openly, and raise issues early to keep things moving. We value different perspectives and believe the best solutions come from open discussion and collaboration. If you like working on systems that matter, in a team that trusts each other and values both skill and teamwork, you’ll feel at home here.
About you:
A product-minded engineer who thinks from a user perspective, understanding both the how and why behind technical solutions.
Engineer with deep knowledge of programming languages (we use mostly Python), frameworks (Flask, FastAPI), and best practices, with strong mastery of data structures, algorithms, and software architecture to build and scale cloud-based systems.
A problem solver who can break down complex challenges into manageable solutions using both analytical thinking and creativity.
An effective communicator who can explain technical concepts to both technical and non-technical stakeholders while documenting technical specifications and processes clearly.
A developer who believes in 'you build it, you run it, you own it,' ensuring high-quality code, debugging, optimization, and automation as key priorities.
What you will be doing:
Contributing to complex technical projects, ensuring robust, secure, and scalable software solutions.
Mentoring and guiding junior engineers, fostering a collaborative and productive work environment. This includes delegating tasks, providing feedback, and facilitating team communication.
Driving innovation by encouraging new ideas, shaping software development, and collaborating closely with product management to create user-centric solutions.
Creating impact outside of your team by helping drive the Engineering strategy and contributing to cross-team collaboration through inter-team working groups or community guilds, among others.
Our hiring process:
Recruiter Interview
People Manager Interview
Live Coding
System Design
Our benefits:
Monthly salary and an annual bonus (15%)
Training and conference budget and free access to Udemy courses
A benefits package with 300 points on the Mybenefit platform per month, private medical care provided by Luxmed, Ask Henry services, and much more
IP rights’ costs
100% remote work (as well as the possibility of working from our offices in Poznan and Warsaw)
Diversity, Equity and Inclusion at OLX
OLX values diversity and welcomes applicants of all races, ethnicities, disabilities, ages, genders, sexual orientations, religions, backgrounds, and experiences to apply. If this role excites you, we encourage you to apply, even if you don’t meet all the requirements - you may be just the right fit for this or other opportunities with us!
OLX will process your personal data to assess your fit for the applied position. You may optionally consent to store your data for up to 12 months after the application process for consideration in future OLX roles. For more details on how your application data will be processed please check our Privacy Statement.
Grupa OLX sp. z o.o. has implemented an internal procedure for reporting violations of the law. You have the right to report a violation of the law via website or by phone using any of the phone numbers listed on this site. The verification of reports and the undertaking of follow-up actions are handled by authorized members of the ethics and compliance team. All reports will be treated with the utmost care, confidentiality and in accordance with applicable law.