Senior Full Stack Developer (Angular & Node.js)

EPAM Systems; Gdańsk; On-site; PLN 180,000 - 260,000; Full time

Job summary

EPAM Systems, Inc. in Gdańsk, Poland is seeking a Senior Full Stack Developer to build and support scalable web apps and backend services for an enterprise AI-driven platform.

You will deliver features across frontend and backend, implement Angular UIs, develop NestJS-based APIs, optimize PostgreSQL schemas, and contribute to CI/CD, testing, and security standards.

Qualifications

• 5+ years in software development with full-stack focus.
• Proficient in Angular, TypeScript, HTML5, CSS3 and responsive design.
• Deep knowledge of NestJS, Node.js, RESTful APIs and PostgreSQL tuning.
• Strong ORM experience with TypeORM and relational DB design.
• Experience with RxJS, NgRx and asynchronous UI patterns.
• Ability to build reusable UI components in monorepo setups.
• Testing with Jest and Karma/Jasmine; Git-based workflows and CI/CD.
• Security fundamentals including JWT/OIDC; English level B2+.
• Nice-to-have: Docker, cloud (Azure/AWS), SSE, AI/LLM integrations.

Responsibilities

• Deliver, test, and release new functionality across frontend and backend.
• Implement responsive Angular UIs that connect to NestJS APIs.
• Develop RESTful microservices for sessions, streaming, and integrations.
• Design and optimize PostgreSQL schemas and ORM data layers.
• Maintain strong test coverage with unit and integration tests.
• Improve CI/CD pipelines and follow security standards.
• Troubleshoot defects across UI, API, and database layers.
• Collaborate with product, UX, and platform engineers to ship features.
• Participate in code reviews and enforce coding standards.

Skills

5+ years experience

Angular

TypeScript

HTML5

CSS3

responsive design

NestJS

Node.js

RESTful APIs

PostgreSQL

TypeORM

RxJS

NgRx

Jest

Karma/Jasmine

Git

CI/CD

JWT/OIDC

English B2

Docker

Cloud (Azure/AWS)

SSE

AI/LLM integrations

Tools

Docker

Git

Nx monorepos

Jest

Karma/Jasmine

TypeORM

NestJS

Job description

We are looking for a Senior Full Stack Developer (Angular & Node.js) to build and support scalable web apps and backend services for an enterprise AI-driven platform.

Responsibilities

• Deliver, test, and release new functionality across frontend and backend components
• Implement responsive and accessible Angular UIs that integrate cleanly with NestJS APIs
• Develop RESTful microservices that enable session handling, streaming capabilities, and platform integrations
• Design and optimize PostgreSQL schemas, queries, and ORM-driven data layers
• Maintain high reliability through thorough unit and integration test coverage
• Improve CI/CD pipelines and follow application security standards consistently
• Troubleshoot and resolve defects across UI, API, and database layers
• Collaborate closely with product managers, UX designers, and platform engineers to ship complete features
• Participate in code reviews and enforce team-wide coding standards

Requirements

• Proven track record of 5+ years of experience in software development
• Hands-on experience with Angular, TypeScript, HTML5, CSS3, and responsive design principles
• Advanced expertise in NestJS, Node.js, RESTful API creation, and PostgreSQL performance tuning
• Strong understanding of ORMs like TypeORM and relational database design
• Solid background using RxJS, state management approaches (NgRx or equivalent), and asynchronous UI patterns
• Practical experience building reusable UI components and shared Angular libraries in monorepo setups
• Working knowledge of testing tools such as Jest and Karma/Jasmine
• Hands-on experience with Git-based workflows and CI/CD practices
• Clear understanding of authentication/authorization approaches (JWT, OAuth/OIDC) and core security fundamentals
• Demonstrated ability to navigate multiple codebases and resolve issues end to end
• English proficiency at B2 (Upper-Intermediate) level or above
• Nice to have Experience with Docker, microservices design, and cloud environments (Azure or AWS)
• Familiarity with real-time or streaming APIs like SSE
• Exposure to AI or LLM integrations, including multi-agent systems and workflow-driven conversational tools
• Understanding of Nx monorepos, feature flag tools, or enterprise portal design
• Background in session management/observability or work within energy and utility sectors