Senior Fullstack Engineer (Java&Kotlin + JavaScript)
Codest Ltd.2 months ago
Remote, PolandSenior
Responsibilities
- Design robust API contracts and facilitate onboarding for external partners.
- Write developer documentation and create mock environments for partner integrations.
- Build modern frontend interfaces including checkout paths, landing pages, and discovery hubs.
- Bridge Java backend architecture with frontend development for cohesive end-to-end implementations.
- Define coding standards, lead technical discussions, and act as the architectural anchor for integrations.
- Support the Incident Response service.
Requirements
- Deep hands-on experience with Java and Kotlin.
- Strong experience designing, building, and scaling RESTful APIs using API-first design, OpenAPI, and Swagger.
- Proficiency in modern JavaScript or TypeScript and a modern frontend framework, preferably React.
- Understanding of distributed systems, integration patterns, OAuth 2.0, and OpenID Connect.
- Ability to design API contracts for external B2B partners and lead technical discussions.
- English proficiency at a minimum B2+ level.
Benefits
- 20–26k PLN on a B2B contract.
- Access to the Worksmile platform.
- A collaborative work environment focused on growth and innovation.
- Recruitment process includes a recruiter screen, technical verification meetings, stakeholder meeting, and offer.
Tech Stack
Categories
About Codest Ltd.
Codest Ltd. is an IT services and consulting firm that supplies senior software developers and product teams to fintech, digital banking, and scaling tech companies, via staff augmentation and end-to-end project delivery. Founded in 2009 and privately held, it is headquartered in London with delivery hubs in Poland. The company’s track record includes building its own product, Yieldbird, recognized in Deloitte growth rankings.