FRONT-END PRINCIPAL ENGINEER – MATRIX PROTOCOL

Svitla Systems Inc. is looking for a Front-end Principal Engineer – Matrix Protocol for a full-time position (40 hours per week) in Ukraine. Our client is a digital identity platform that empowers individuals to securely own and manage their personal information online. It allows users to create a portable digital identity that they fully control, eliminating the need for multiple usernames and passwords across different platforms. Users can obtain verifications from trusted entities, such as banks or educational institutions, to authenticate aspects of their identity, enhancing trust and security in digital interactions. The platform offers encrypted messaging and document sharing, ensuring users can communicate and exchange information safely. The solution includes a digital wallet feature, enabling users to manage various digital assets and currencies within the same secure environment.

The project is building a next-generation digital identity platform that empowers users to take control of their data, privacy, and online identity. As part of this mission, they are rebuilding their messaging system using the Matrix protocol—an open, secure, and decentralized standard for real-time communication. The client is looking for a Principal Engineer with expertise in Matrix client development to lead the front-end evolution of their messaging experience. This role focuses on implementing Matrix client-side features, improving usability, and supporting future-facing functionality across web and mobile.

Requirements

• 8+ years of experience in software engineering.
• 4+ years of hands-on experience with the Matrix protocol.
• Deep knowledge of Matrix client-server APIs and encryption mechanisms.
• Solid understanding of frontend development with frameworks like React, React Native, or equivalent.
• Proven UI/UX sensibility and ability to create polished user interfaces.
  
  

Nice to Have

• Experience with other decentralized communication protocols.
• Contributions to the Matrix ecosystem.
• Familiarity with mobile frameworks (React Native, iOS, Android).
• Understanding of decentralized identity (DID, SSI).
• Open-source project involvement or standards body participation (IETF, W3C).
  
  

Responsibilities

• Build or contribute to Matrix clients (e.g., Element or custom implementations).
• Utilize the Matrix client-server API to implement chat functionality.
• Work with modern frontend frameworks (including mobile as needed).
• Ensure a seamless and polished user experience, focusing on UI/UX.
• Support future features aligned with the platform’s product roadmap.
  
  

We offer

• US and EU projects based on advanced technologies.
• Competitive compensation based on skills and experience.
• Annual performance appraisals.
• Flexibility in workspace, either remote or in one of our development offices.
• Comprehensive medical insurance including dental and massages.
• Sport reimbursement program for onsite and online activities.
• Support of a healthy lifestyle, compensation for running events.
• Bonuses for recommendations of new employees.
• Bonuses for article writing, public talks, other activities.
• Personal loan budget available for long-term personnel.
• 20 vacation days, 10 national holidays and sick leaves.
• Maternity leave policy and family days off.
• Full compensation for conferences, courses, English classes.
• Free webinars, meetups and conferences organized by Svitla.
• Gifts for New Year, anniversaries, children, and more.
• Fun corporate celebrations and activities, regular lectures on various topics.
• Awesome team, friendly and supportive community!