Full Stack Developer (TS, Strong Middle - Upper Middle)

Softwarium develops software for customers in the United States, Canada, and Norway across industries such as education, healthcare, energy, and security.
 

We’re looking for a Full Stack Engineer who doesn’t just deliver tasks, but takes ownership, works confidently with existing systems, and helps improve the product over time. This is a long-term product, not a short-term delivery — you’ll be involved in building, maintaining, and evolving it together with the team for our US Client.

Team: PM, 2 QA, 1 Devops, 11 Developers, Architect
Tech Stack: TS, React, Next.js, Vue.js, Nuxt.js, Node.js, Fastify, Azure Functions/AWS Lambda, GraphQL, Swagger, Docker, Playwright, CI/CD, SQL, and NoSQL.

Responsibilities:

• Develop and maintain full-stack features for a marketplace application using React, Next.js, and Node.js (TypeScript);
• Support and enhance existing frontend applications, ensuring performance, scalability, and maintainability;
• Design, implement, and maintain backend services using Azure Functions within a microservices architecture;
• Work with containerized applications, including maintaining and supporting existing Vue/Nuxt-based services;
• Handle request processing within containerized environments, including data flow management and caching strategies (e.g., Redis);
• Design and integrate APIs using REST and GraphQL, with proper documentation via Swagger/OpenAPI;
• Implement and maintain unit tests, and contribute to overall test coverage and quality;
• Collaborate with engineers through daily code reviews, providing and receiving constructive technical feedback;
• Ensure reliability and performance through proper logging, monitoring, and debugging of production issues;
• Work with existing systems, performing safe refactoring and maintaining backward compatibility;
• Collaborate with DevOps-managed infrastructure, ensuring smooth integration and deployment of services;
• Contribute to the continuous improvement of code quality, architecture, and development processes;
• Take ownership of features end-to-end, including development, support, debugging, and ongoing enhancements.
   

Requirements

• 4+ years of commercial experience in software development;
• Strong hands-on experience with TypeScript;
• Solid experience with React (Vue.js as a plus);
• Experience with SSR frameworks (Next.js and Nuxt.js);
• Experience building backend services with Node.js (TypeScript);
• Good understanding of API development (REST, GraphQL, Swagger, or OpenAPI);
• Experience working with microservice architecture;
• Hands-on experience with Azure Cloud (including Azure Functions, Event Grid, SQS); AWS background is also acceptable;
• Experience working with containerized applications (Docker);
• Familiarity with CI/CD pipelines;
• Understanding of authentication & authorization (OAuth2, tokens, cookies);
• Basic knowledge of caching and performance optimization;
• Experience with relational and NoSQL databases;
• Ability to write unit tests for own code;
• Experience with integration tests and working knowledge of Playwright E2E testing;
• Understanding of clean code principles (SOLID, maintainability);
• Experience working in a team: code reviews, collaboration, ownership;
• Comfortable using AI-assisted tools, with strong judgment to review, refine, and ensure code quality.
   

Nice to Have

• Experience with Fastify;
• Familiarity with the Azure ecosystem (Service Bus, etc.);
• Experience with Cosmos DB / DynamoDB;
• Basic understanding of system resilience patterns;
• Experience working with .NET / C# environments;
  
   

Working conditions:

✍️ B2B contract;

⚖️ Long-term cooperation;

🏠 Possibility to work remotely or in the office (Kyiv);

🚀 Learning & Development program: a team of senior developers, individual budget for professional development (trainings and events, certification);

💶 You can always count on paid vacation (20 working days), sick leave (5 paid days), and holidays.