Senior Full Stack Engineer – Web3 & Blockchain Engineer

As a Senior Full Stack Engineer at TrustGrid, you design and develop scalable full-stack applications for SynQ Social, integrating blockchain technologies, payment workflows, and decentralised functionalities. You work across frontend and backend systems, spanning React.js, Node.js, smart contract integrations, and real-time communication systems to deliver secure, high-performance product experiences.

What you'll do

• Design, develop and maintain full-stack applications using React.js, Node.js, Express.js and JavaScript
• Build secure RESTful APIs, implement business logic and optimise application performance
• Develop and manage MongoDB databases, schemas and queries
• Integrate blockchain networks, smart contracts, wallets and decentralised application functionalities
• Develop backend systems for social networking, marketplace operations, user management and transaction processing
• Implement payment gateway integrations, including payment verification, webhooks, refunds and reconciliation
• Build real-time communication and data synchronisation systems using WebSockets
• Implement message brokers and event-driven architectures for asynchronous communication and distributed processing
• Develop secure authentication, authorisation and data management workflows
• Collaborate with engineering, design and QA teams to deliver reliable, production-ready applications
• Troubleshoot, maintain and optimise existing application services

What you bring

• 4-6 years of professional experience in full-stack or backend development
• Strong proficiency in JavaScript (ES6+), Node.js, Express.js and React.js
• Hands-on experience with MongoDB and database design
• Strong understanding of the MERN stack and RESTful API development
• Experience with blockchain technologies, EVM-compatible networks, smart contracts, ethers.js or Web3.js
• Experience integrating payment gateways such as Stripe, Razorpay or equivalent platforms
• Hands-on experience with WebSockets and real-time application development
• Understanding of message brokers such as RabbitMQ, Apache Kafka or Redis Pub/Sub
• Knowledge of asynchronous programming, event-driven architecture and distributed systems
• Understanding of authentication, API security and transaction management
• Familiarity with Git, Docker, cloud deployment and CI/CD practices
• Strong problem-solving, debugging and system design skills

Nice to have

• Experience with Web3 applications, decentralised marketplaces or blockchain-based products
• Knowledge of Solidity, microservices and advanced distributed system patterns
• Experience with real-time messaging, notifications and distributed communication systems
• Ability to independently manage full-stack modules and contribute to architectural decisions

About TrustGrid

TrustGrid is building infrastructure for a more trusted digital world, focusing on secure, decentralised, privacy-first and interoperable digital infrastructure across identity, verifiable credentials, distributed systems and digital experiences.