SENIOR BACK-END PRINCIPAL ENGINEER – MATRIX PROTOCOL Remote Colombia April 29, 2025 Svitla Systems Inc. is looking for a Senior Back End Developer with Matrix for a full-time position (40 hours per week) in Colombia. Our client is a digital identity platform that empowers individuals to own and manage their personal information online securely. 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 involves rebuilding the 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 deep experience in the Matrix ecosystem to lead the backend development and integration of their new messaging system. This role will focus on backend infrastructure and protocol-level integration, tackling key challenges such as token handling, session reliability, federation stability, and secure communication Requirements: 8+ years of experience in software engineering. 4+ years of hands-on experience with the Matrix protocol (mandatory). Deep knowledge of Matrix APIs, federation, and encryption mechanisms. Solid understanding of backend development with Python, Go, or Node.js. Strong knowledge of secure communication principles and real-time systems. Nice to Have: Experience with other decentralized communication protocols. Contributions to the Matrix ecosystem. Experience with bridging services (e.g., IRC, Slack, Discord). Understanding of decentralized identity (DID, SSI). Open-source project involvement or standards body participation (IETF, W3C). Responsibilities: Lead Matrix protocol backend integration and ongoing maintenance. Work with Matrix server implementations such as Synapse or Dendrite. Deeply understand and apply Matrix APIs, federation, and authentication flows. Integrate Matrix into the backend stack (Python, Go, Node.js). Address token handling, session management, reliability, and scaling. Ensure a secure and robust communication infrastructure. We offer US and EU projects based on advanced technologies. Competitive compensation based on skills and experience. Remote-friendly culture and no micromanagement. Christmas Bonus in the amount of 15 days' salary. Bonuses for article writing, public talks, other activities. Personalized learning program tailored to your interests and skill development. Free webinars, meetups and conferences organized by Svitla. Fun corporate celebrations and activities. Awesome team, friendly and supportive community! About Svitla Svitla Systems is a global digital solutions company headquartered in California, with business and development offices throughout the US, Latin America, Europe, and Asia. Svitla is an outspoken advocate of workplace flexibility, best known for its well-established remote culture, individual approach to our teammate’s professional and personal growth, and trustworthy environment. Since 2003, Svitla has served a wide range of clients, from innovative start-ups in California to mega-large corporations such as Ingenico, Amplience, InvoiceASAP and Global Citizen. At Svitla, developers work with clients’ teams directly, building lasting and successful partnerships, as a result of seamless integration with on-site processes. Svitla Systems’ global mission is to build a business that contributes to the well-being of our partners, personnel and their families, improves our communities, and makes a lasting difference in the world. Join us! If you are interested in our vacancy, please send your CV. We will be happy to see you in our friendly team :) Tell us briefly about your project, and we will contact you within a day. First Name Last Name Email Country Phone Number Linkedin Profile Link (Optional) Attach Cover Letter (optional) Choose a file or drag and drop ithere (Pdf, max file size 10MB) Attach Resume Choose a file or drag and drop ithere (Pdf, max file size 10MB) or Send me information about vacancy or Svitla news by email (Optional) By submitting the form, you agree to the processing of your personal data. Svitla Privacy Policy Recaptcha requires verification. I'm not a robot reCAPTCHA Privacy - Terms #J-18808-Ljbffr