Senior Software Engineer Python @ OpenX

OpenX; Polska; On-site; PLN 90,000 - 120,000; Full time

Job summary

A leading tech company in Poland is seeking a Senior Software Engineer specializing in Python to design and develop high-performance systems. You will collaborate with diverse teams, participate in agile development, and contribute to innovative solutions in the digital advertising space. The ideal candidate should have over 5 years of experience and knowledge of cloud platforms. This role offers excellent benefits including private healthcare and flexible working conditions.

Benefits

Private healthcare

Lunch card

Life & group insurance

Free beverages

In-house trainings

Modern office

Free snacks

Free lunch

Qualifications

• 5+ years of experience in a similar role focused on Python.
• Experience in database design, RDBMs, or NoSQL.
• Experience with cloud providers like GCP or AWS.

Responsibilities

• Design high-performance, distributed, low-latency systems.
• Architect and deliver new features and functionality.
• Work with Product to drive requirements and manage projects end-to-end.
• Collaboration with distributed Engineering and Product teams.

Skills

Python

Database system design

RDBMs (MySQL, Postgres)

NoSQL

Cloud providers (GCP or AWS)

REST API or GraphQL

JavaScript

Tools

React

Node.js

Java

Go

Erlang

Elixir

Cloud Build

Spinnaker

Job description

Senior Software Engineer Python @ OpenX

Polska

At OpenX, we have built a team that is uniquely experienced in designing and operating high‑scale ad marketplaces, and we are constantly on the lookout for thoughtful, creative executors who are as fascinated as we are about finding new ways to apply a blend of market design, technical innovation, operational excellence, and empathetic partner service to the frontiers of digital advertising.

Project: You will have a chance to work in some aspects of agile application development, including our highly efficient and available serving platform. Your opinions will be considered in certain phases of product development, starting from requirements to validation and deployment. You will assist other engineers to ensure that our processes are defined, documented, tested, and easy to use. We use Scrum and are flexible in adapting the process to our needs. You will work closely with a full‑stack team of SWEs and SDETs focusing on different domains and be part of the API Guild.

Technologies

• Frontend: JS/TS, React, Material UI
• API: Python, Node.js
• Backend: Java, Go, Erlang, Elixir
• CICD: Cloud Build, Spinnaker

Responsibilities

• Design high-performance, distributed, low‑latency systems.
• Architect, create, and deliver new features and functionality.
• Work with Product to drive the requirements and own the project end-to-end.
• Work with Engineering and Product teams distributed across multiple locations.
• Analyze and improve efficiency, scalability, and stability of servers and processes.
• Think long‑term and be unsatisfied with band‑aids.
• Identify unnecessary complexity and remove it.
• Analyze existing solutions.

Qualifications

• 5+ years of similar position working experience in Python.
• Experience with database system design, RDBMs (MySQL, Postgres), or NoSQL.
• Experience with one of the Cloud providers (GCP or AWS).
• Experience working in digital media, marketing technology, or advertising technology is a big plus.
• Experience in REST API or GraphQL.
• Experience with JavaScript – nice to have.

Benefits

• Small teams, International projects.
• Private healthcare, Lunch card, Multi‑cafeteria.
• Life & group insurance.
• Flat structure, No dress code.
• Free coffee, Canteen, Bike parking, Playroom, Shower.
• Free snacks, Free beverages, Free lunch, Free parking.
• In‑house trainings, Modern office.