May 25, 2026

Senior Fullstack Java Developer

Senior • Hybrid

6,500 - 7,000 USD

Warsaw, Poland

Overview

We are a company leveraging AI to optimize business operations. Our mission is to provide digital solutions and consulting services that help companies grow and create value. By using modern technology, we simplify processes, increase efficiency, and discover new revenue opportunities—especially in private capital markets.

Our ecosystem includes:

  • PaaS (Platform as a Service): A core platform that enhances workflows, provides actionable insights, and supports value creation.

  • SaaS (Software as a Service): A cloud platform offering robust performance and intelligent tools at scale.

  • S&C (Solutions & Consulting): Flexible tools and methodologies to manage, grow, and improve company performance.

With over 10 years of experience working with fast-growing companies and private equity businesses, we know how to harness technology to deliver tangible business advantages.

Job Description

We are looking for Full Stack Developer with strong Java expertise. While your main focus will be backend systems, experience with modern frontend technologies (React.js, TypeScript) is also required.

You will join an Agile team to design, build, and maintain scalable, secure, and high-performing applications.

Key Responsibilities

Backend Development (Primary Focus)

  • Develop and maintain REST APIs and microservices using Java (Spring Boot, Hibernate, JPA).

  • Implement secure authentication, authorization, and data handling mechanisms.

  • Design and optimize databases (PostgreSQL, MySQL, MongoDB) for performance and reliability.

  • Integrate with third-party APIs, cloud services, and internal systems.

  • Participate in deployment pipelines using CI/CD tools (Jenkins, GitHub Actions, GitLab CI/CD) and containerization (Docker, Kubernetes).

Frontend Development (Nice-to-Have)

  • Build responsive UI components using React.js, Redux, and modern JavaScript/TypeScript.

  • Apply best practices in UI/UX design, performance optimization, and cross-browser compatibility.

  • Work with UI frameworks like Material-UI, Bootstrap, or Tailwind CSS.

Code Quality & Testing

  • Write clean, maintainable, and well-documented code.

  • Create unit and integration tests for backend services, and frontend components if applicable.

Collaboration & Agile Development

  • Collaborate with designers, product managers, and DevOps engineers.

  • Participate in Agile/Scrum ceremonies and contribute to process improvement initiatives.

Required Skills & Experience

Backend

  • Strong proficiency in Java, Spring Boot, Hibernate, JPA, and REST API development.

  • Experience with microservices architecture and API Gateway.

  • Knowledge of authentication/authorization protocols: OAuth2, JWT, sessions.

Frontend (Optional / Nice-to-Have)

  • Experience with React.js, Redux, TypeScript, HTML5, CSS3, and modern JavaScript.

  • Understanding of state management and component-based design.

  • Familiarity with UI libraries/frameworks: Material-UI, Bootstrap, or Tailwind CSS.

Database & DevOps

  • SQL (PostgreSQL, MySQL) and NoSQL (MongoDB, Redis).

  • CI/CD pipelines (Jenkins, GitHub Actions, GitLab CI/CD).

  • Cloud platform experience (AWS, Azure, GCP) and containerization (Docker/Kubernetes).

Qualifications

  • Bachelor’s or Master’s degree in Computer Science, Engineering, or related field.

  • 5+ years of experience as a Full Stack or Backend Developer.

  • Experience working in Agile teams.

  • Strong problem-solving and analytical skills.

Soft Skills

  • Excellent communication and teamwork abilities.

  • Ability to manage multiple tasks in a fast-paced environment.

  • Eagerness to learn new technologies and improve processes.

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