Principal Software Engineer

Europe Latin America Ukraine Node.js React Software Developer

Required skills

Node.js / expert
React.js / expert
English / strong

Lead a dynamic tech team with cutting-edge web1 and web3 technologies. Join us now!

As Sigma Software, we are involved with the client team to contribute to designing and developing a technical solution for the customer’s tokenized domain reservation platform. We started by assigning a software architect to design smart contracts and integrate blockchain into the solution.

The client has a distributed team of specialists from various countries. On Sigma’s side, there is an architect, a Scrum Master, and a DevOps.

The team follows Scrum methodology.


Our client handles internet domain names. They’ve managed over 50 domain endings since 2000 and are now creating names that work in both the current and upcoming decentralized internet (web2web3).


The project aims to revolutionize the domain industry by seamlessly connecting Web 1 and Web 3. The business value is providing secure, decentralized identities through tokenized, compliant domains. This solves the problem of ensuring accessibility and security in the digital world.

The project is in a highly active development stage, resembling the fast-paced nature typical of startup environments.


  • At least 8+ years of professional software development experience
  • Strong technical expertise in full-stack development, with proficiency in Node.js, JavaScript/TypeScript, ReactJS, HTML, and CSS
  • Experience with relational databases, preferably PostgreSQL
  • Strong understanding of software development methodologies, tools, and best practices
  • Experience in managing and leading engineering teams, with a track record of successful project delivery and team development
  • Ability to balance strategic thinking with a hands-on approach to problem-solving
  • Advanced level of English

Would be a plus

  • Familiarity with smart contracts and blockchain technologies
  • Hands-on experience in writing smart contracts in Solidity and knowledge of ERC-721, ERC-1155, and ERC-20 standards.
  • Experience with microservices or other types of distributed architecture
  • Experience with Nest.js
  • Experience with Next.js
  • Experience with GraphQL

Personal Profile

  • Excellent communication and interpersonal skills, with the ability to collaborate effectively with cross-functional teams and stakeholders
  • Strong problem-solving and decision-making abilities, with a focus on driving results and meeting deadlines
  • Self-motivated, adaptable, and eager to learn new technologies and frameworks
  • Ability to work during the second part of the day


  • Guide and mentor a team of engineers, fostering their professional growth and ensuring high-performance delivery
  • Collaborate with product managers, designers, and stakeholders to define technical requirements, set priorities, and drive engineering initiatives
  • Work with the engineering team to design and develop robust and scalable solutions using Node.js on the backend and JavaScript, ReactJS/Redux on the frontend
  • Ensure technical excellence through code reviews, feedback, and the promotion of best practices
  • Foster a culture of quality, efficiency, and innovation by implementing engineering processes, tools, and methodologies
  • Collaborate with the product team to align engineering efforts with product vision and roadmap, ensuring timely and successful delivery
  • Stay updated with the latest technologies, frameworks, and best practices in web development, blockchain, and smart contract development. Guide the team in adopting new technologies where appropriate
  • Ensure the security and reliability of the core customer-facing product and internal tools, proactively addressing any potential issues or vulnerabilities
  • Collaborate with other teams, such as marketing and operations, to identify and address technical challenges and opportunities that impact the overall success of the company


  • 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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