Senior/Mid React Native Engineer - Tieto Tech Consulting (m/f/d)

Tieto Tech Consulting (MentorMate from 2001 to 2026) provides design-led, data-centric, and AI-powered digital engineering & consulting services to enterprises worldwide. With a strong heritage of Nordic quality, local presence, and global-scale operations, we are backed by 8,500+ IT professionals. Our clients trust us for advanced data and analytics skills, top industry-specific expertise, specialized software R&D, and the capabilities of a multinational team. We are part of Tieto, a leading technology company with an annual revenue of approximately EUR 2bn.   

Tieto Tech Consulting’s team in Bulgaria consists of 500+ professionals specializing in the development of tailored digital solutions in diverse industries. 

About the role 
 
We are looking to hire a React Native Engineer to join our growing team and lead the development of high-quality mobile applications. You will play a key role in designing and implementing scalable, performant, and user-friendly mobile solutions using React Native, with a strong emphasis on modern JavaScript (ES6+), state management, and clean architecture. This role is ideal for someone who thrives in a collaborative environment, enjoys solving complex problems, and is passionate about delivering impactful solutions. 
 
 
Responsibilities 

• Architect, develop, and maintain mobile applications using React Native 

• Collaborate with cross-functional teams including product, design, and backend engineers 

• Implement and manage state management using Redux and Redux Toolkit 

• Ensure code quality through unit testing, code reviews, and adherence to best practices 

• Optimize application performance and responsiveness across platforms 

• Stay up-to-date with the latest mobile development trends and technologies 

• Mentor junior developers and contribute to team growth 

 
Requirements 

• 5+ years of professional experience in JavaScript/TypeScript 

• 3+ years of hands-on experience with React Native 

• Strong understanding of ES6+ features and modern JavaScript practices 

• Deep knowledge of Redux, Redux Toolkit, and application state management 

• Experience with RESTful APIs, mobile UI/UX patterns, and performance optimization 

• Familiarity with CI/CD pipelines and mobile app deployment (App Store / Google Play) 

• Excellent problem-solving skills and attention to detail 

• Strong communication and collaboration skills 

 
A significant advantage would be 

• Hands-on experience with Bluetooth integrations (e.g., BLE devices, wearable tech) 

• Familiarity with native modules and bridging between React Native and native code (iOS/Android) 

• Knowledge of accessibility standards and inclusive design practices 

• Experience with analytics, crash reporting, and monitoring tools 

At Tieto, we believe in the power of diversity, equity, and inclusion. We encourage applicants of all backgrounds, genders (m/f/d), and walks of life to join our team, as we believe that this fosters an inspiring workplace and fuels innovation. Our commitment to openness, trust, and diversity is at the heart of our mission to create digital futures that benefit businesses, societies, and humanity.

Diversity, equity and inclusion | Sustainability | Tieto