Senior Fullstack Developer

At our company we're looking for a Senior Fullstack Developer to join our Sofia-based Engineering team and take an active role in shaping our SaaS platform.Youll work across the stack - from modern frontends to scalable backend services - helping us deliver world-class features to thousands of users worldwide.As a senior engineer, youll influence architectural decisions, mentor team members, and collaborate closely with Product, UX, and fellow engineers - all within an agile Scrum framework.What Youll DoDesign and develop end-to-end features - from responsive UIs to robust APIs.Build high-quality frontends with React, Redux, and TypeScript.Develop and maintain scalable backend services using Node.js, Laravel (PHP), and Python.Optimize database interactions across PostgreSQL, MySQL, Redis, and MongoDB.Work within a hybrid architecture leveraging DigitalOcean and AWS cloud platforms.Participate in Scrum ceremonies and collaborate in an agile, iterative development process.Maintain and improve our CI/CD pipelines, and contribute to server, deployment, and DevOps tasks.Participate in code reviews, architecture discussions, and tech roadmap planning.Mentor junior and mid-level engineers, fostering a culture of learning and excellence.Collaborate cross-functionally with Product, Design, and DevOps to deliver high-impact solutions.Requirements: Technical Must-Haves5+ years experience as a Fullstack Developer.Proficiency in React, Redux, TypeScript, and solid understanding of modern frontend architecture.Strong backend experience in Node.js and at least one of: Laravel (PHP) or Python.Deep understanding of relational and non-relational databases: PostgreSQL, MySQL, Redis, MongoDB.Familiarity with cloud platforms - DigitalOcean and/or AWS.Experience with CI/CD pipelines, Docker, and server / deployment / DevOps tasks.Experience working in an Agile Scrum team.Solid grasp of unit, integration, and end-to-end testing.Strong understanding of scalable and performant software architecture.Bonus PointsExperience with React Native.Familiarity with Asterisk and VoIP / telephony systems.Experience with scalable event-driven architectures.Background in building SaaS products or communication platforms (VoIP, WebRTC, SIP).Soft Skills We ValueOwnership mindset - you take initiative and drive features end-to-end.Strong team spirit - collaborative, helpful, and open to feedback.Excellent communication skills and cross-team collaboration.Passion for mentoring and helping others grow.Comfortable working in a fast-paced, agile environment.Eagerness to learn and stay updated on the latest technologies.This position is open to all candidates.