Senior Full-stack Developer, Python/FastAPI, React & SQL

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

Benefits offered by this job

Hybrid by design

Remote within Poland

Relocation opportunities

English classes

Health insurance

Stock Purchase Plan

Job summary

EPAM Systems is seeking a Senior Full-stack Developer in Poland to own end-to-end delivery from Python/FastAPI APIs to React/TypeScript UI. You will optimize PostgreSQL and OpenSearch performance and collaborate in a Databricks-heavy environment.

You will design APIs, integrate high-load systems, and deliver robust frontend work while leveraging GenAI tools to improve workflows. The role requires strong solo and team collaboration in a fast-paced startup setting.

Qualifications

• 5+ years of production delivery with Python, FastAPI, and SQL.
• Advanced knowledge of web application development, API design, and integration work.
• Hands-on ability to operate high-load databases and optimize query performance.
• Familiarity with TypeScript and React and willingness to work across the full stack.
• Practical experience with GenAI engineering tools, ideally Claude Code.
• Strong communication abilities and proactive ownership in a fast-moving startup environment.
• English proficiency at B2 (Upper-Intermediate) level or higher.

Responsibilities

• Develop and enhance web applications using Python/FastAPI and SQL.
• Define and implement APIs and integrations that support high-load database operations.
• Optimize and troubleshoot query performance in production systems.
• Deliver front-end work using TypeScript and React.
• Incorporate GenAI engineering tools to improve development workflows.
• Work collaboratively while independently owning assigned tasks.
• Maintain proactive communication with stakeholders and teammates.
• Own features end to end and contribute beyond ticket completion.
• Execute effectively through ambiguity in a fast-paced startup environment.

Skills

Python

FastAPI

SQL

TypeScript

React

GenAI tools

English (B2)

Communication

Tools

Claude Code

PySpark

OpenSearch

PostgreSQL

Databricks

Next.js

Storybook

Playwright

Job description

We are launching a new multi-cloud product and need a Senior Full-stack Developer to own full-stack delivery from Python/FastAPI APIs to React/TypeScript UI. You will optimize PostgreSQL and OpenSearch performance and collaborate in a Databricks-heavy environment.

Responsibilities

• Develop and enhance web applications using Python/FastAPI and SQL
• Define and implement APIs and integrations that support high-load database operations
• Optimize and troubleshoot query performance in production systems
• Deliver front-end work using TypeScript and React
• Incorporate GenAI engineering tools to improve development workflows
• Work collaboratively while independently owning assigned tasks
• Maintain proactive communication with stakeholders and teammates
• Own features end to end and contribute beyond ticket completion
• Execute effectively through ambiguity in a fast-paced startup environment

Requirements

• Demonstrated 5+ years of production delivery with Python, FastAPI, and SQL
• Advanced knowledge of web application development, API design, and integration work
• Hands-on ability to operate high-load databases and optimize query performance
• Familiarity with TypeScript and React and willingness to work across the full stack
• Practical experience with GenAI engineering tools, ideally Claude Code
• Strong communication abilities and proactive ownership, comfortable working solo and with a team
• Track record of navigating ambiguity and shipping without constant direction in a transparent, fast-moving startup environment
• English proficiency at B2 (Upper-Intermediate) level or higher

Nice to have

• Experience with TypeScript, React, Next.js, Storybook, Playwright, Radix UI, and Zustand
• Experience working with PostgreSQL and OpenSearch
• Knowledge of cloud platforms, Infrastructure as Code, and related tools
• Data engineering experience using PySpark and SparkSQL
• Client-facing experience

We offer

• We gather like-minded people:
• Top tech minds driving innovation in AI, cloud and digital platform modernization
• Supportive team and agile, startup-like culture
• Hybrid by design mode and opportunity to work remotely within Poland
• Chance to work abroad for up to 60 days annually
• Business-driven relocation opportunities
• We provide growth opportunities:
• Career development programs
• Thought leadership, mentoring, soft skills and well-being programs
• Certification (Anthropic, Gemini, GCP, Azure, AWS)
• English classes
• We cover it all:
• Stable pay
• Participation in the Employee Stock Purchase Plan with a 15% discount
• Benefits package (health insurance, multisport, shopping vouchers)
• Referral bonuses up to $2,000
• Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and more
• Corporate, social and well-being events
• Please, note:
• Benefits listed above are available to employees only
• We are open for working with Contractors. Terms of B2B cooperation agreements are agreed individually
• We will reach out to selected candidates exclusively

EPAM is global leader in AI transformation engineering and integrated consulting, serving Forbes Global 2000 companies and ambitious startups. With over thirty years of expertise in custom software, product and platform engineering, we empower our clients to become AI-Native enterprises, driving measurable value from innovation and digital investments.