Java Full Stack Developer

Randstad Polska; Województwo mazowieckie; Hybrid; PLN 180,000 - 240,000; Full time

Job summary

Randstad Polska in Warsaw is seeking an experienced Java Full Stack Developer to join our engineering team. The role combines backend Java 17 with Spring Boot and frontend Angular, in a hybrid work model with 3 days in the office and 2 remote.

You will design scalable microservices, build secure RESTful APIs, work with MongoDB and relational databases, ensure code quality with JUnit/Mockito and Jasmine, and participate in CI/CD pipelines using Docker, Kubernetes/OpenShift.

Qualifications

• Hands-on experience building scalable backend with Java 17 and Spring Boot.
• Frontend development with Angular 12+ and TypeScript.
• Designing secure RESTful APIs with OpenAPI/Swagger.

Responsibilities

• Design & Develop frontend with Angular and backend microservices.
• APIs & Databases: MongoDB and SQL; optimize data models.
• Quality & Security: JUnit/Mockito/Jasmine for tests; OWASP adherence.

Skills

Java 17

Spring Boot

Angular 12+

TypeScript

RxJS

NgRx

OpenAPI/Swagger

REST APIs

MongoDB

PostgreSQL

MySQL

Oracle

JUnit

Mockito

Jasmine/Karma

Docker

Kubernetes

OpenShift

CI/CD

Jenkins

GitHub Actions

OWASP security

DDD

Gen AI integration

Tools

Angular

Docker

Kubernetes

OpenShift

CI/CD (Jenkins)

GitHub Actions

Job description

We are looking for an experienced Java Full Stack Developer to join our engineering team in Warsaw in a hybrid model. In this role, you will design scalable microservices with Java 17 and Spring Boot, build modern frontend applications using Angular, and have the opportunity to explore hands‑on Generative AI integrations in our products.

What will your tasks involve?

• Design & Develop: Build responsive frontend applications using Angular (12+) and scalable backend microservices with Java 17 and Spring Boot.
• APIs & Databases: Implement secure RESTful APIs and optimize data models for both MongoDB and SQL databases.
• Quality & Security: Write comprehensive tests (JUnit, Mockito, Jasmine) and ensure code meets enterprise architecture and security standards (OWASP, OAuth2).
• DevOps & Cloud: Containerize applications using Docker, deploy on Kubernetes/OpenShift, and maintain CI/CD pipelines.
• Performance & Support: Implement monitoring/observability, optimize system resilience (caching, circuit breakers), and resolve production issues (RCA).
• Agile & AI: Collaborate closely with cross-functional teams in an Agile environment and explore Generative AI / LLM integrations.

What we expect from you?

• Backend Proficiency: Solid hands-on experience with Java 17, Spring Boot, Spring MVC/WebFlux, and microservices architecture patterns.
• Frontend Skills: Strong expertise in Angular (12+), TypeScript, RxJS, NgRx, modern HTML5/CSS3, and responsive UI principles.
• APIs & Databases: Practical experience designing secure RESTful APIs (OpenAPI/Swagger) and working with both MongoDB and relational databases (PostgreSQL, MySQL, Oracle).
• Testing & Quality Standards: Familiarity with testing frameworks (JUnit, Mockito, Jasmine/Karma) and clean coding practices (DDD, layered architecture, OWASP security).
• Agile Mindset: Experience working effectively within cross-functional teams in an Agile/Scrum delivery environment.
• Nice to Have: Hands-on exposure to Docker, Kubernetes, OpenShift, CI/CD pipelines (Jenkins, GitHub Actions), or initial experience integrating LLM/Gen AI into applications.

What you can expect from us?

• Stable Employment: Permanent, full-time employment contract with a competitive salary package.
• Balanced Hybrid Model: A flexible setup with 3 days in our modern Warsaw office and 2 days remote.
• Cutting-Edge Stack: Hands-on work with modern technologies (Java 17, Cloud/OpenShift) and opportunities to explore Gen AI / LLM implementations.
• Professional Growth: Dedicated budget for training, certifications, tech conferences, and clear career progression paths.
• Comprehensive Benefits: Premium private healthcare, life insurance, sports card (e.g., MultiSport), and high-spec hardware/workstation setup.
• Engineering Culture: A collaborative Agile environment that champions clean code, continuous learning, and architectural autonomy.

this job offer is intended for people over 18 years of age