Senior Full-stack Developer

EPAM Systems; Poland; Hybrid; PLN 260,000 - 380,000; Full time

Benefits offered by this job

Hybrid by design

Remote work within Poland

Opportunities to work abroad up to 60–

Job summary

EPAM Systems is seeking a Senior Full-stack Developer to build a new product using Python and FastAPI for the backend, React/TypeScript for the frontend, and PostgreSQL/OpenSearch for data management. The role operates in a multi-cloud environment with Databricks involvement.

Responsibilities include API design, high-load query optimization, and collaboration with the team while also working independently. Hybrid work in Poland is offered, with potential for international project exposure.

Qualifications

• 5+ years of production experience with Python, FastAPI and SQL.
• Strong API design and integration skills.
• Experience with high-load databases and query optimization.
• Frontend experience with TypeScript and React.
• Experience using GenAI tools, Claude Code preferred.
• Excellent communication and proactive mindset.
• Ability to navigate ambiguity and work in a fast-moving startup.

Responsibilities

• Build and maintain web apps with Python/FastAPI and SQL.
• Design APIs and integrations for high-load DB ops.
• Improve query performance across production systems.
• Support frontend with TypeScript and React.
• Leverage GenAI tools to improve workflows.
• Collaborate with team and work independently as needed.
• Communicate proactively with team and stakeholders.
• Own features and contribute beyond tickets.

Skills

Python

FastAPI

SQL

APIs

TypeScript

React

GenAI tools

Communication

Ambiguity handling

Independent work

Tools

PostgreSQL

OpenSearch

Databricks

PySpark

Job description

We're seeking a Senior Full-stack Developer to help build a new product using Python and FastAPI for the backend, React/TypeScript for the frontend, and PostgreSQL and OpenSearch for database management. The product runs in a multi-cloud environment and relies heavily on Databricks.

Responsibilities

• Build and maintain web applications with Python/FastAPI and SQL
• Design APIs and integrations that handle high-load database operations
• Improve query performance across production systems
• Support front-end development efforts using TypeScript and React
• Use GenAI engineering tools to enhance development workflows
• Work both collaboratively with the team and independently on assigned tasks
• Maintain proactive communication with team members and stakeholders
• Own product features and contribute meaningfully beyond simply completing tickets
• Handle ambiguity and deliver results within a fast-paced startup setting

Requirements

• 5+ years of hands-on production experience with Python, FastAPI, and SQL
• Strong expertise in web application development, API design, and integrations
• Skilled in managing high-load databases and optimizing query performance
• Some front-end experience with TypeScript and React, along with openness to full-stack work
• Practical experience using GenAI engineering tools, Claude Code preferred
• Excellent communication skills and a proactive mindset, comfortable working solo or as part of a team
• Ability to navigate ambiguity and make progress independently in a transparent, fast-moving startup setting
• English fluency at B2 level or above

Nice to have

• Strong background in TypeScript, React, Next.js, Storybook, Playwright, Radix UI, and Zustand
• Hands-on experience with PostgreSQL and OpenSearch
• Knowledge of cloud platforms, Infrastructure as Code, and related tooling
• Experience in data engineering, particularly working with PySpark and Spark SQL
• Prior experience working directly with clients

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.