Sigma Software Senior Full Stack Engineer (ReactJS/Node.js) | SmartRecruiters

• Warsaw, Poland
• Full-time

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 
• Build a responsive, user-friendly UI using ReactJS 
• Develop robust Back-end services and APIs (REST/GraphQL) using Node.js 
• Collaborate closely with data engineers 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, for building efficient and maintainable applications 
• Expertise in Node.js for building scalable Back-end services and APIs 
• Strong experience with React for designing maintainable, scalable UI systems 
• Experience in designing and implementing Data APIs for efficient data workflows 
• Hands-on experience with AWS or GCP, including cloud deployment and management 
• Strong knowledge of RESTful APIs, microservices, and database systems (SQL/NoSQL) 
• Upper-Intermediate level of spoken and written English 

WOULD BE A PLUS

• Experience with model context protocol (MCP) for managing context in AI model interactions 
• Familiarity with workflow automation tools such as n8n 
• Knowledge of DevOps practices, CI/CD pipelines, or containerization (e.g., Docker, Kubernetes) 

Additional Information

PERSONAL PROFILE

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

I'm interested[

I'm interested

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