Senior Full-Stack Engineer — Python/React + GenAI

EPAM Systems; Poland; Hybrid; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Hybrid by design

Remote work within Poland

Work abroad up to 60 days annually

Relocation opportunities

Career development programs

English classes

Health insurance

Employee Stock Purchase Plan with 15%+

Office entertainment and relaxation

Referral bonuses

Job summary

EPAM Systems is building a new product in a multi-cloud setup and seeks a Senior Full-stack Developer to drive backend and frontend delivery. You will build with Python/FastAPI, React/TypeScript, PostgreSQL, OpenSearch, and heavy Databricks usage while optimizing performance.

You will create and maintain web applications, architect APIs, and deliver UI work end-to-end in a fast-moving startup environment with hybrid Poland-based work and occasional remote opportunities abroad.

Qualifications

• 5+ years delivering production systems with Python, FastAPI and SQL.
• Strong understanding of web app development, API architecture and integration patterns.
• Experience with high-load databases and performance optimization.
• Proficient in TypeScript and React, capable of end-to-end full-stack delivery.
• Hands-on use of GenAI engineering tools (Claude Code preferred).
• Clear communication with proactive ownership in a fast-moving startup.

Responsibilities

• Create and maintain web applications with Python/FastAPI and SQL.
• Architect APIs and integrations to support high-load database workloads.
• Improve query performance across production systems.
• Deliver UI work using TypeScript and React.
• Apply GenAI engineering tools to streamline developer workflows.
• Partner with teammates while owning and completing independent assignments.
• Share progress with stakeholders and the wider team.
• Drive feature ownership and add value beyond ticket-by-ticket execution.
• Deliver outcomes in a fast-paced startup environment despite ambiguity.

Skills

Python

FastAPI

SQL

TypeScript

React

GenAI tools

Claude Code

Communication

Ownership

Big data queries

Tools

PostgreSQL

OpenSearch

PySpark

SparkSQL

Databricks

Job description

EPAM Systems is building a new product in a multi-cloud setup and seeks a Senior Full-stack Developer to drive backend and frontend delivery. You will build with Python/FastAPI, React/TypeScript, PostgreSQL, OpenSearch, and heavy Databricks usage while optimizing performance.

You will create and maintain web applications, architect APIs, and deliver UI work end-to-end in a fast-moving startup environment with hybrid Poland-based work and occasional remote opportunities abroad.