Fullstack Developer, Java, React

Appfire

. Design, develop, and maintain product features using Java, Spring Boot, TypeScript, Node.js, and React .

Posted 11/1/2026full-timeRemote • PolandMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in Java 17, Spring Boot, TypeScript, Node.js, and React for developing scalable SaaS solutions. Proficient in building RESTful APIs, automated testing, and collaborating effectively with cross-functional teams.

Highest-signal resume keywords

Java 17Spring BootTypeScriptNode.jsReact

ATS Keywords

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Hard Skills

RESTful API DevelopmentAutomated TestingSoftware Design PrinciplesApplication ArchitectureUnit TestingIntegration TestingGitMavenDockerState Management

Soft Skills

Problem-SolvingCollaborationContinuous ImprovementCommunication

Tools & Technologies

JUnit 5MockitoVitestPlaywrightReduxTanStack Query

Industry Keywords

Cloud-Based SaaSWorkflow SolutionsAutomation Solutions

Tech Stack

Tools & technologies

CloudDockerJavaJavaScriptJUnitMavenMockitoNode.jsReactReduxSpringSpring BootSpringBootTypeScript

About the role

Key responsibilities & impact

Design, develop, and maintain product features using Java, Spring Boot, TypeScript, Node.js, and React
Build and maintain RESTful APIs, backend services, and frontend applications for Workflow and Automation solutions
Ensure high code quality through unit, integration, and end-to-end testing, code reviews, and collaborative problem-solving
Collaborate with product managers, UX/UI designers, and other development teams to deliver customer-focused features
Contribute to the design, development, and continuous improvement of cloud-based SaaS architecture
Build reliable, scalable, and secure solutions considering performance, concurrency, caching, and authorization
Investigate and resolve technical issues, including providing technical support for customers
Share knowledge, contribute to team discussions, and support continuous learning and improvement across the development team

Requirements

What you’ll need

Minimum 3 years of solid commercial experience with Java 17 and Spring Boot, including developing and maintaining RESTful APIs
Strong practical experience with TypeScript and Node.js, particularly for backend logic, serverless functions, or API resolvers
Strong frontend development experience with React, including modern state management solutions such as Redux or TanStack Query and routing
Practical understanding of software design principles, design patterns, and application architecture
Experience writing automated tests, including unit and integration tests, and familiarity with JUnit 5, Mockito, Vitest, or Playwright
Experience using Git and Maven
Working knowledge of Docker and modern development workflows
Strong problem-solving skills and a hands-on approach
Willingness to collaborate, experiment, learn, and continuously improve
Good English communication skills (B2 or higher)

Benefits

Comp & perks

Company equity eligibility for every Appfire team member
26 paid vacation days annually, regardless of tenure
One fully paid Wellness Day each month for unplanned emergency, rest, or recovery needs
24 hours of paid volunteer time annually
3 fully paid volunteering days each year through Appfire Town CSR program
Appfire University custom, on-demand learning platform for continuous learning and professional development
Fully covered Luxmed private healthcare plan
Option to extend healthcare coverage to a partner or add personalized upgrades
UNUM life insurance, fully paid by Appfire
MyBenefit Platform with 150 PLN per month for Multisport, shopping, restaurants, and entertainment
Lunch Card with 300 PLN monthly for groceries or dining out via virtual prepaid Pluxee card
200 PLN net per month home office allowance for electricity and internet costs