Senior Full Stack Developer (Java and React)

Our requirements

• 5+ years of commercial experience in full-stack software development
• Strong backend expertise with Java and Spring (Boot, MVC, Data)
• Experience designing and implementing APIs
• Solid knowledge of relational databases, particularly PostgreSQL, including debugging performance and data-related issues
• Strong understanding of OOP principles, design patterns, and Test-Driven Development (TDD)
• Hands-on experience building production-grade applications with React, including hooks, component composition, and performance optimization
• Strong proficiency in TypeScript, including advanced typing and type-safe application design
• Experience working with state management libraries such as MobX, Redux, or similar solutions
• Good understanding of modern build tools and frontend tooling, including Vite or Webpack
• Strong analytical and problem-solving skills with the ability to investigate unfamiliar technical challenges
• High level of ownership and ability to work independently in a remote environment
• Ability to start tasks with incomplete specifications and refine requirements during implementation
• Upper-intermediate (B2+) or higher level of spoken and written English
• Strong communication skills and ability to collaborate effectively in an international environment

Optional

• Experience developing applications within the Atlassian ecosystem (e.g. Atlassian Forge)
• Familiarity with analytics, reporting solutions, or data integration protocols
• Experience working with AWS services (EC2, ElastiCache, RDS), Kubernetes, and CI/CD pipelines
• Knowledge of performance optimization techniques and secure coding practices
• Experience supporting customer-facing products and collaborating with support teams

Your responsibilities

• Design, develop, and maintain new features and modules across backend and frontend components
• Support, enhance, and continuously improve the existing codebase
• Build deep product knowledge, including its integrations, data flows, and ecosystem
• Investigate and troubleshoot technical issues, working closely with support teams to provide end-to-end solutions
• Collaborate with Product Managers, Software Engineers, QA Engineers, SRE teams, and other stakeholders throughout the development lifecycle
• Create unit and integration tests to ensure software quality and reliability
• Participate in peer code reviews and promote engineering best practices
• Develop and maintain integrations with third-party tools and external systems

About the project

This is how we organize our work

This is how we work on a project

• code review
• TDD
• integration tests
• test automation
• unit tests

What we offer

• Vacation days: Up to 26 business days per year
• 10 illness/special days off per year (fully paid, no medical papers needed) for all contract types
• Health and life insurance (Luxmed)
• MyBenefit platform with Multisport option
• Internal psychological support service
• English language classes from the first working day
• Access to external learning platforms: O’Reilly, LinkedIn Learning, Udemy, and a wide catalog of diverse internal training
• Flexible workplace: work from the office, from home, or choose a hybrid option
• Tech Skills Mentoring Program
• Opportunities to develop as a public speaker, mentor, or technical interviewer
• Certification reimbursement (AWS, GCP, Microsoft, etc.)

Development opportunities we offer

• substantive support from technological leaders
• technical knowledge exchange within the company
• time for development of your ideas

Benefits

• sharing the costs of sports activities
• private medical care
• sharing the costs of foreign language classes
• sharing the costs of professional training & courses
• life insurance
• remote work opportunities
• flexible working time
• corporate products and services at discounted prices
• integration events
• employee referral program
• extra leave

DataArt Poland sp. z o.o.