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Offer summary
(Summary generated by AI based on the full job description)
The project focuses on developing scalable backend solutions for a SaaS platform with emphasis on integrating AI-powered capabilities. The key technologies are Scala and Python, with Scala maintaining existing services and Python used for implementing new features and AI integration. Responsibilities include backend development and maintenance, AI deployment, and extending the platform. Proficiency in Scala, Python, as well as CI/CD and Agile practices is required.
Senior Software Engineer (Scala & Python)
Company: SQUARE ONE RESOURCES sp. z o.o.
from: 13 July 2026
to: 12 August 2026
150 - 180 złnet (+ VAT)/ hr.B2B contract (full-time)
Offer parameters
level:senior
working mode:remote
location:Warszawa, Masovian
Warszawa, Masovian
Requirements
Expected technologies
Scala
Python
LLM
Optional technologies
Elasticsearch
AWS
Microsoft Azure
Google Cloud Platform
Our requirements
- Strong commercial experience with Scala in production environments
- Strong proficiency in Python
- Senior-level experience in backend software development
- Solid understanding of software engineering best practices: automated testing, version control, CI/CD pipelines, Agile development methodologies
- Experience designing and developing scalable backend systems
Optional
- Hands-on experience with Large Language Models (LLMs)
- Experience integrating AI models or AI-based services into production systems
- Experience with AI transcription solutions or similar AI technologies
- Knowledge of Elasticsearch
- Experience working with AI service APIs
- Previous experience with PHP development
- Familiarity with cloud-based AI services such as AWS, Azure, or Google Cloud Platform
Your responsibilities
- We are looking for an experienced Senior Software Engineer (Scala & Python) to join an existing engineering team responsible for developing backend services and expanding AI-powered capabilities across a SaaS platform.
- In this role, you will work on building and improving scalable backend solutions, maintaining existing Scala-based services, and developing new features using Python. You will also contribute to integrating AI models and external AI services into production systems.
- Both Scala and Python are key technologies for this position. Scala is essential for maintaining and extending the existing platform, while Python will be heavily used in day-to-day development, especially around AI integrations and new capabilities.
This is how we organize our work
This is how we work
at the client's site
SQUARE ONE RESOURCES sp. z o.o.
At Square One Poland we link IT experts with the business. With over 25 years of experience, we specialize in recruitment processes on a global scale. Despite years of experience, we still have a startup DNA and this is our advantage. Our offices are located in London and Warsaw, however, we can reach clients from all over the world, from start-ups to big worldwide corporations.
This is how we work
Senior Software Engineer (Scala & Python)
150–180 zł / hr. (B2B)
I apply to:
SQUARE ONE RESOURCES sp. z o.o.
Warszawa, Masovian
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