Senior Full-stack Developer

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

Benefits offered by this job

Health insurance

Multisport

Shopping vouchers

Employee Stock Purchase Plan

Job summary

EPAM Systems is seeking a Senior Full-stack Developer to join a team building a new product using Python/FastAPI on the backend and React/TypeScript on the frontend. The stack includes PostgreSQL, OpenSearch, Databricks, and multi-cloud environments. Hybrid work with Poland-wide remote options is offered.

You will design APIs, optimize queries, and apply GenAI tooling to improve workflows while collaborating with a fast-moving startup team. English proficiency is required.

Qualifications

• 5+ years of production experience with Python, FastAPI, and SQL.
• Experience designing APIs and integrations for high-load systems.
• Proficient in front-end with TypeScript/React and GenAI tooling.

Responsibilities

• Develop and maintain web applications using Python/FastAPI and SQL.
• Design APIs and integrations that support high-load database operations.
• Optimize query performance across production systems.
• Contribute to front-end development using TypeScript and React.
• Apply GenAI engineering tools to improve development workflows.
• Collaborate with the team while also working autonomously on assigned tasks.
• Communicate proactively with team members and stakeholders.
• Take ownership of product features and drive meaningful contributions beyond ticket completion.
• Navigate ambiguity and deliver results in a fast-paced startup environment.

Skills

Python

FastAPI

SQL

API design

High-load databases

TypeScript

React

GenAI tools

Communication

English

Tools

Claude Code

Databricks

PostgreSQL

OpenSearch

Next.js

Storybook

Playwright

Radix UI

Zustand

Job description

We are looking for a Senior Full-stack Developer to join a team building a new product that leverages Python and FastAPI on the backend, React/TypeScript on the front end, with database management powered by PostgreSQL and OpenSearch. The product operates in a multi-cloud environment and makes heavy use of Databricks.

Responsibilities

• Develop and maintain web applications using Python/FastAPI and SQL
• Design APIs and integrations that support high-load database operations
• Optimize query performance across production systems
• Contribute to front-end development using TypeScript and React
• Apply GenAI engineering tools to improve development workflows
• Collaborate with the team while also working autonomously on assigned tasks
• Communicate proactively with team members and stakeholders
• Take ownership of product features and drive meaningful contributions beyond ticket completion
• Navigate ambiguity and deliver results in a fast-paced startup environment

Requirements

• 5+ years of production experience with Python, FastAPI, and SQL
• Expertise in web application development, API design, and integrations
• Proficiency in handling high-load databases and query performance optimization
• Familiarity with front-end development using TypeScript and React, with willingness to work full-stack
• Hands-on experience with GenAI engineering tools, ideally Claude Code
• Strong communication skills and proactivity, with the ability to work both independently and within a team
• Capability to deal with ambiguity and get things done without constant direction in a transparent, fast-moving startup environment
• English proficiency at B2 level or higher

Nice to have

• Solid experience with TypeScript, React, Next.js, Storybook, Playwright, Radix UI, and Zustand
• Experience with PostgreSQL and OpenSearch
• Familiarity with cloud platforms, Infrastructure as Code, and related tools
• Background in data engineering, handling data with PySpark and SparkSQLClient-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.