backend developer for banking systems

emagine; Warszawa; Hybrid; PLN 176,000 - 238,000; Full time

Job summary

emagine приглашает в команду Backend Python разработчика для банковского проекта. Вы будете разрабатывать и поддерживать современные backend и интеграционные решения, проектировать REST API и строить их для внешних систем.

Также нужен опыт работы с OpenAPI, тестированием через pytest и контейнеризацией. Требуется ≥3 лет опыта Python, знание FastAPI или Django REST Framework, SQLAlchemy, Docker, CI/CD, Linux, и свободное владение польским языком.

Qualifications

• ≥3 года коммерческого опыта Python
• Опыт с FastAPI или Django REST Framework
• Проектирование API с нуля и развёртывание в продакшн
• Знание REST API дизайна и OpenAPI контрактов
• Опыт работы с OpenAPI спецификациями
• Знание OAuth2/JWT и API-ключей
• Хорошие SQL-навыки; SQLAlchemy или ORM
• Docker и CI/CD; Linux/Unix; pytest
• Свободное владение польским языком

Responsibilities

• Создавать качественный код и технические решения
• Разрабатывать REST API с нуля и разворачивать в продакшн
• Поддерживать OpenAPI спецификации как контракты
• Интегрироваться с существующими системами и базами данных
• Проводить модульные, интеграционные и контракт-тесты через pytest
• Сотрудничать с аналитиками и архитекторами

Skills

Python

FastAPI

Django REST Framework

OpenAPI

SQLAlchemy

REST API design

OAuth2/JWT

Docker

CI/CD

Linux/Unix

pytest

Polish language

Job description

Описание:

The project is in the banking sector and involves developing and maintaining modern backend and integration solutions. It includes designing and building APIs consumed by external systems and teams.

Задачи:

• Create high-quality code
• Design technical solutions
• Design REST APIs from scratch and deploy them to production for external systems or teams
• Build and maintain REST APIs in production
• Create and maintain OpenAPI specifications as contracts
• Integrate with existing systems, including working with legacy database schemas
• Optimize SQL queries and diagnose performance issues
• Run unit, integration, and contract tests using pytest
• Create technical documentation
• Conduct technical alignment with recipient teams
• Collaborate with analysts and architects

Требования:

• At least 3 years of commercial Python programming experience
• Proficiency with FastAPI or Django REST Framework and its ecosystem, including Pydantic, SQLAlchemy, or Django ORM
• Proven experience designing an API from scratch and deploying at least one API consumed by external systems or teams to production
• Practical knowledge of REST API design, including resource modeling, HTTP method semantics, response codes, versioning, and idempotency
• Experience creating OpenAPI specifications as contracts, not as documentation generated after the fact
• Knowledge of machine authentication: OAuth 2.0 client credentials, JWT, and API keys with rotation
• Good SQL and relational database skills, including query optimization
• Experience integrating with existing systems
• Ability to write automated unit, integration, and contract tests using pytest
• Knowledge of Docker and CI/CD pipelines
• Knowledge of Linux/Unix, REST, SOAP, and SQL
• Knowledge of FastAPI, Uvicorn, Gunicorn, and Anaconda
• Ability to write clear technical documentation and conduct technical alignment with recipient teams
• Experience with JIRA and Confluence
• Fluent Polish

Будет плюсом:

• Experience in the financial sector or another regulated industry, record-level data access control, asynchronous processing with Celery or task queues, API gateway and traffic management tools, monolith-to-service-architecture migration, generating OpenAPI documentation and keeping it consistent with code, contract testing tools, supporting teams integrating with APIs, Azure or another cloud platform

Условия:

Rate up to approximately 150 PLN/hour net + VAT, B2B Hybrid work in Warsaw, up to one office day per week