Full Stack Engineer with focus on Back-end - Career Sigma Software
Sigma • Europe (remote)
No Relocation
Posted: January 22, 2026
Additional Content
Required skills
- Required skills
- Node.js / strong Express.js / strong MongoDB / good Firebase Authentication / good Vue.js / good
- Are you passionate about creating impactful web and mobile solutions and excited to work on cutting-edge music technology? We at Sigma Software are looking for a Middle Full Stack Engineer with a strong focus on back-end development to join our team and help shape innovative tools for musicians worldwide.
- You can work remotely, onsite in Warsaw, or in a hybrid format — we are flexible to fit your lifestyle. At Sigma Software, you will join a collaborative environment where your expertise will directly influence product performance, usability, and global reach.
- Why join us? We offer competitive benefits, a supportive team culture, and the opportunity to work on projects that make a real difference in the music industry.
Customer
- Customer
- Our Customer is a leading innovator in the music technology industry, dedicated to transforming how musicians interact with sheet music. Their portfolio includes advanced Optical Music Recognition systems and cross-platform applications that enhance music performance and accessibility worldwide.
Project
- Project
- The project focuses on developing and enhancing a comprehensive sheet music technology ecosystem. This includes cross-platform mobile applications, single-page web applications, and a proprietary Sheet Music Core engine integrated with Optical Music Recognition technology. The goal is to deliver accurate, high-performance, and user-friendly solutions for musicians globally.
Requirements
- 3–5 years of experience as a Full Stack Engineer, with strong back-end focus
- Proven system design skills for scalable back-end systems
- Solid understanding of SQL/NoSQL databases and data structures
- Experience with RESTful APIs and integrations
- Proficiency in Node.js, Express.js, MongoDB, Firebase (auth)
- Familiarity with Agile/Scrum methodologies
- Ability to work independently and master complex business logic
- Excellent communication skills and experience working with US-based Customers
Personal Profile
- Independent and proactive problem solver
- Passionate about learning new technologies
- Strong communication skills and team-oriented mindset
- Committed to delivering high-quality solutions to stakeholders
- Experience in the music domain
Responsibilities
- Design, develop, and maintain cross-platform mobile and web applications within the sheet music ecosystem
- Enhance the proprietary Sheet Music Core engine and OMR system to improve accuracy and performance
- Collaborate closely with product managers, designers, and engineers to deliver robust, scalable solutions
- Ensure code quality through reviews, documentation, and adherence to Agile best practices
- Integrate back-end services with front-end applications, ensuring seamless user experiences
- Troubleshoot and resolve technical issues across platforms
WHY US
- Diversity of Domains & Businesses
- Variety of technology
- Health & Legal support
- Active professional community
- Continuous education and growing
- Flexible schedule
- Remote work
- Outstanding offices (if you choose it)
- Sports and community activities
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