Senior Full Stack Engineer (React Native & Node.Js)

• *All interviews will be conducted remotely (online or by phone).

Join a fast-growing fintech company transforming the way people spend abroad. Leveraging open-banking technology and a modern, cloud-based stack, the engineering team continuously experiments with new approaches to push the boundaries of what’s possible in payments. You’ll be part of a small, friendly, and highly collaborative group where everyone has real ownership and influence.

We’re looking for a Senior Software Engineer who thrives in an agile environment and can balance hands-on coding with broader architectural and strategic thinking. You’ll take ownership of key systems, support junior engineers through guidance and knowledge sharing, and play a significant role in cross functional technical initiatives.

Key Responsibilities:

• Build, improve, and optimize features for the mobile application (iOS & Android) using React Native.
• Design, develop, and maintain scalable backend services and APIs using Node.js, ensuring high performance and reliability.
• Shape technical solutions by making informed architectural decisions and selecting appropriate tools, patterns, and technologies.
• Troubleshoot and resolve complex issues across the full stack, including backend logic, mobile app components and integrations.
• Mentor and support junior and mid-level engineers through code reviews, pair programming, and feedback.
• Ensure code quality through thorough code reviews, adherence to best practices, and proactive refactoring.
• Drive improvements in application performance, scalability, and security.
• Build and maintain clean, maintainable, and well tested codebases.
• Contribute to engineering standards, processes, and technical documentation.

Must have Requirements:

• 5+ years of professional experience as a full stack software engineer.
• Extensive hands on experience with React Native, including building and optimizing mobile applications for both iOS and Android.
• Strong expertise in Node.js development (JavaScript/TypeScript), including building scalable and reliable backend services.
• Ability to work independently on complex tasks and contribute high quality technical solutions.
• Proven track record of solving complex debugging and performance issues across the full stack.
• Solid experience with Git, CI/CD workflows, and modern software development practices.
• Strong communication skills and the ability to collaborate effectively with cross functional teams.
• Passion for clean, maintainable code, high engineering standards, and building scalable, impactful products.
• Comfortable participating in technical discussions and offering insights.

Nice to Have:

• Experience with AWS or similar cloud infrastructure.
• Background in fintech, payments, or customer-facing technology.
• Prior experience in a startup or fast paced environment

What we offer:

• An attractive remuneration. Referral bonuses.
• Standard working hours.
• Remote work, requiring 1-2 office days per month in Sofia or Varna.
• 25 days of paid leave + 2 additional days for volunteering activities.
• Full training provided.
• Additional health insurance and other social benefits. Exclusive discounts & offers.
• Digital food vouchers.
• Open-minded management team promoting innovation, and personal and professional development.
• Permanent employment; full-time.