Senior Front-End Developer (FinTech Project)

SigmaSoftware2

Bucharest, Bucharest, Romania Remote permanent

Posted: March 31, 2026

Required Skills

Job Description

Ready to take your front-end expertise to the next level? At Sigma Software, we’re looking for a Senior Front-End Developer with strong React.js expertise who thrives on crafting exceptional user experiences and delivering high-quality, scalable solutions. 

Joining Sigma Software means becoming part of a global team that values your ideas, supports your growth, and empowers you to make an impact. We believe in combining cutting-edge technologies with a culture of collaboration and continuous improvement.

CUSTOMER

Our client has rapidly become one of Europe’s most swiftly expanding FinTech companies. They oversee all aspects of financial operations, from generating virtual cards to facilitating wire transfers and maintaining customer account balances. As a payment institution, our client provides a platform that integrates financial services into its product, offering features such as account management, card payments, bank transfers, and additional services. 

• Design and implement large-scale software solutions and components, primarily using React.js and TypeScript
• Maintain high-quality standards throughout development, testing, and deployment phases
• Collaborate closely with cross-functional teams to understand requirements and deliver optimal solutions
• Mentor and guide less-experienced engineers, fostering knowledge sharing and skill development
• Apply clean code principles, design patterns, and best practices in all development work
• Ensure system security and scalability in distributed architectures
• Participate in code reviews and continuous improvement initiatives

• 5+ years of experience in front-end software development
• 3+ years of experience with TypeScript
• 4+ years of experience working with React.js
• Strong expertise in designing distributed and secure systems
• Solid understanding of microservices architecture
• Experience in designing, building, and maintaining APIs
• Proficiency in building and consuming REST and/or GraphQL APIs
• Experience working with AWS cloud services
• Knowledge of testing best practices
• Upper-Intermediate or higher English proficiency

WOULD BE A PLUS

• Familiarity with DevOps practices
• Experience with CI/CD pipelines and automation tools
• Knowledge of containerization (Docker, Kubernetes)
• Exposure to financial services or payment systems
• Understanding of regulatory compliance in FinTech

PERSONAL PROFILE

• Strong analytical and problem-solving skills
• Excellent communication and team collaboration abilities
• Proactive approach to learning and adopting new technologies
• Leadership mindset with mentoring capabilities
• Attention to detail and commitment to quality

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