Fullstack Engineer (Java&Kotlin + JavaScript)

🌍 Hello World! We are The Codest - International Tech Software Company with tech hubs in Poland delivering global IT solutions and projects. Our core values lie in “Customers and People First” approach that prioritises the needs of our customers and a collaborative environment for our employees, enabling us to deliver exceptional products and services. Our expertise centers on web development, cloud engineering, DevOps and quality. After many years of developing our own product - Yieldbird, which was honored as a laureate of the prestigious Top25 Deloitte awards, we arrived at our mission: to help tech companies build impactful product and scale their IT teams through boosting IT delivery performance. Through our extensive experience with product development challenges, we have become experts in building digital products and scaling IT teams. But our journey does not end here - we want to continue our growth. If you’re goal-driven and looking for new opportunities, join our team! What awaits you is an enriching and collaborative environment that fosters your growth at every step. Project description: Our client is one of the largest e-commerce platforms in Europe, used by millions of users every day. The company connects sellers - from small businesses to global brands - with customers, offering a vast product selection, fast delivery, and a well-crafted shopping experience. Designing a vertical-specific user experience for the automotive category as part of company’s key strategic initiative, aimed at transforming the platform from a general-purpose marketplace into a collection of specialized “stores within a store.” The role: The role is primarily backend-focused (approx. 60% of the workload), while also involving active frontend development using components (approx. 40%). Develop and enhance the automotive vertical experience as part of a key strategic initiative focused on creating specialized marketplace experiences. Design, build, and maintain scalable backend services and REST APIs using Java/Kotlin and Spring Boot. Develop frontend features using React and TypeScript, working with existing components and Microfrontend architecture. Design and maintain distributed, microservices-based solutions, with a strong focus on code quality, testing, performance, and reliability. Work with Google Cloud Platform (GCP), SQL and NoSQL databases, including MongoDB. Build and maintain technical and business monitoring for developed products and features. Use AI-assisted development tools, such as GitHub Copilot, OpenCode, and other agentic coding solutions, as part of your daily development workflow. Collaborate with engineers, product teams, and other stakeholders to deliver new features and continuously improve the platform. Ability to effectively use AI-assisted development tools (e.g. GitHub Copilot, OpenCode, or other agentic coding tools) as part of the day-to-day software development workflow. Backend Strong proficiency in Java and Kotlin, with experience in building scalable backend applications. Strong knowledge of Spring Boot for developing modern applications and REST APIs. Strong focus on code quality, testing, and application performance, as well as the ability to build both technical and business monitoring for developed products. Experience in designing, implementing, and maintaining distributed microservices-based architectures. Hands-on experience with GitHub Copilot, OpenCode, or other agentic coding tools. Frontend Strong proficiency in TypeScript and modern JavaScript. Good knowledge of React and its ecosystem for building user interfaces. Solid understanding of semantic HTML5 and the ability to create responsive layouts using CSS. Practical knowledge of building accessible web applications in line with WCAG standards. Nice to have: Hands-on experience working with cloud platforms, with a particular focus on Google Cloud Platform (GCP). Basic knowledge of both relational (SQL) and NoSQL databases, with a particular focus on MongoDB. Practical knowledge of SQL. Experience working with Microfrontend architecture. Our offer: 15-20k PLN on a B2B contract Access to the Worksmile platform A work environment that values growth and innovation - you bring the ideas, and we want to hear them 😉 Recruitment process: 30-minute screen with our recruiter, Justyna Technical Verification Meetings Stakeholder meeting Offer Questions, insights? Feel free to reach out to our recruiting team: justyna.pazdalska@thecodest.co In the meantime, feel free to visit our website where you can find key facts about us.