Full Stack Developer
Corevist
- Warszawa, mazowieckie
- Stała
- Pełny etat
We are looking for a Full-Stack Engineer (Middle/Senior) to join our Product & Engineering team. This role combines strong backend expertise in Python, Java, or Ruby on Rails with solid experience in ReactJS for building modern, scalable applications.
As a Full-Stack Engineer, you will design and develop robust APIs, maintain complex backend systems, and build rich, interactive front-end experiences. You'll also take part in architectural decisions, ensure code quality, and collaborate closely with product managers, QA engineers, and UI/UX designers.Core Responsibilities
- Design and develop backend services using Ruby on Rails (primarily), Java and Python.
- Build and maintain modern, responsive front-ends using ReactJS and TypeScript
- Create and optimize RESTful APIs for seamless integration between backend and frontend
- Write clean, maintainable, and well-tested code.
- Contribute to shared component libraries and maintain consistent design systems
- Optimize applications for performance, scalability, and accessibility (WCAG standards)
- Participate in architectural discussions and influence technical roadmaps
- Conduct code reviews and mentor junior team members
- Collaborate across distributed teams in Agile ceremonies (standups, planning, retrospectives)Required Qualifications
- 5+ years of professional software development experience
- 2+ years of Ruby on Rails commercial development experience
- Expertise in other backend programming languages: Python/Java.
- Expertise in ReactJS, TypeScript, and modern JavaScript (ES6+)
- Solid understanding of MVC architecture, OOP, SOLID and programming patterns
- Knowledge of testing frameworks (RSpec, Jest, Cypress)
- Experience designing and consuming REST APIs
- Strong knowledge of HTML5, CSS3, and responsive design principles
- Proficiency with Git workflows, CI/CD pipelines, and containerized environments (Docker)
- Knowledge of relational databases (MariaDB) and query optimization
- Excellent communication skills in English (B1 or higher)Nice to Have
- Familiarity with microservices or event-driven architectures
- Experience with cloud platforms (AWS, GCP, or Azure) and deployment automation
- Background in performance tuning and scaling large applications
- Previous work with B2B platforms or ERP-integrated solutions
- Experience in integration with payment systemsCorevist Offers
- Official employment via UoP
- Hybrid work model: 2 days per week in our Warsaw office
- Competitive salary aligned with experience
- Private healthcare and wellness benefits (Luxmed, Multisport)
- Quarterly and annual bonuses based on KPIs.
- Additional mental health days.
- Learning & development support, including certifications and internal knowledge-sharing.