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Senior Full Stack Developer (Node.js/ReactJS)

Sigma Software

Posted 2 days ago

About this role

Company Description

We are looking for a Senior Full Stack Engineer to join one of our teams and help us build great products for our clients.

Join a globally recognized company, where innovation meets impact. With a team of seasoned professionals and a culture built on excellence, we deliver top-tier solutions that shape industries and drive meaningful results.

Become part of a company where your expertise is valued, your voice is heard, and your career is empowered!

CUSTOMER

Our client is a global content and information company shaping the future of media and data. With a century-long legacy and a strong focus on innovation, the team builds trusted experiences and tools that inform, inspire, and empower millions of people worldwide.

Job Description

  • Design, develop, and maintain scalable applications across front-end and back-end layers
  • Develop robust back-end services and APIs (REST/GraphQL) using Node.js
  • Build responsive, user-friendly UIs using ReactJS
  • Collaborate closely with data engineers and ML teams to integrate AI features and data-driven logic into the product
  • Optimize application performance, scalability, and reliability in a cloud environment
  • Implement best practices for security, CI/CD, testing, and code quality
  • Work with product and design teams to translate business requirements into technical solutions
  • Take ownership of features from ideation to deployment and monitoring in production
  • Stay up to date with emerging technologies and contribute to technical decision-making and innovation within the team

Qualifications

  • 5+ years of professional experience with JavaScript, including modern frameworks and tools
  • Expert proficiency in Node.js for scalable back-end services and APIs
  • Expertise in ReactJS for modern, responsive front-end interfaces
  • Experience designing and implementing Data APIs for efficient workflows
  • Familiarity with VectorDB or similar vector databases for AI/ML applications
  • Hands-on experience with AWS or GCP, including deployment and management
  • Strong knowledge of RESTful APIs, microservices, and database systems (SQL/NoSQL)
  • Upper-Intermediate level of spoken and written English

WILL BE A PLUS

  • Experience with Model Context Protocol (MCP) for AI model interactions
  • Familiarity with workflow automation tools such as Langflow or n8n
  • Knowledge of DevOps practices, CI/CD pipelines, or containerization (Docker, Kubernetes)

Additional Information

PERSONAL PROFILE

  • Strong problem-solving skills
  • Attention to detail
  • Ability to work independently
  • Excellent communication and collaboration skills

Job details

Workplace

Office

Location

Kyiv, Kyiv city, Ukraine

Job type

Full Time

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@sigmaswgroup

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