Backend Developer

Senior

We are looking for a skilled Backend Developer who will combine Python backend engineering with the integration of Generative AI solutions into our web applications. In this role, you will be responsible for designing, developing, and maintaining APIs, working with databases, and co‑creating intelligent features based on modern AI models.

You will work closely with other engineers and stakeholders to translate business requirements into reliable, production‑grade services. You will take ownership of your code, from implementation and testing to deployment and monitoring, ensuring quality and performance across the entire lifecycle.

Your responsibilities

Design, develop, and maintain backend services and RESTful APIs in Python
Integrate Generative AI capabilities (e.g. LLMs, external model APIs) into web applications
Work with SQL or NoSQL databases, including data modeling and query optimization
Create and maintain CI/CD pipelines to support continuous delivery and high‑quality releases
Write clean, readable, and testable code following good engineering practices
Participate in code reviews and collaborate with the team on technical decisions
Work with technical and business stakeholders to refine requirements and deliver valuable features

Key requirements

Professional experience in backend development with Python
Hands‑on experience with FastAPI or a similar framework for building APIs
Knowledge of Generative AI tools and concepts (e.g. LLMs, integration with model APIs)
Experience working with SQL or NoSQL databases
Experience in creating and maintaining CI/CD pipelines
Strong understanding of designing and implementing RESTful APIs
Ability to write clean, maintainable, and well‑tested code
Experience with code review processes and version control systems (e.g. Git)
Ability to work in a team and communicate effectively with technical and business stakeholders

What we offer

Work with cutting‑edge technologies in a dynamic, experienced team
Opportunities for professional growth and participation in exciting projects
Flexible working hours and remote work options
Friendly atmosphere and close collaboration with senior professionals in data and AI

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Additional information

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I consent to the processing of my personal data provided through the application form and in the attached CV for recruitment purposes by DS Stream Sp. z o.o. with its registered seat in Warsaw (03 - 840), at Grochowska 306/308. The consent is freely given.

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• The data controller of your personal data is DS Stream sp. z o. o., with registered seat in Warsaw (03 – 840), at Grochowska 306/308;
• Your personal data will be processed with the purpose of recruitment process pursuant to the art. 6 (1)(a) GDPR, i.e. based on your freely given consent;
• Your personal data will be stored until the recruitment process is completed;
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Can’t find your ideal role?

No worries! You’re welcome to send us your resume, and we’ll reach out if a suitable position comes up. We believe we’ll find the right spot for you that matches your skills and aspirations.