Backend Developer

About the job

Company Description MarsDevs is a remote-first, offshore digital product development company, committed to delivering high-quality code and long-lasting technical architectures. We specialize in building MVPs, mobile and web applications, and SaaS products for startups and SMBs. Our services include systematic project analysis, UI/UX design, technical consulting, application deployment, and ongoing support. Only Apply If you are available for a contractual role. About the Role: We are looking for a skilled Backend Developer with strong Node.js and Web3 experience to help build and scale our blockchain-based applications. You will work closely with our product and frontend teams to create secure, high-performance services that power real-world crypto solutions. Key Responsibilities: • Develop and maintain backend services using Node.js. • Integrate Web3 functionalities such as crypto wallets, transactions, and payment utilities. • Design and implement secure APIs and microservices. • Collaborate with cross-functional teams to deliver scalable features. • Ensure cloud deployments follow best practices for security and performance. • Quickly adapt to new blockchain integrations and evolving crypto workflows. Requirements: • 4+ years of backend development experience with Node.js (Python or Go is a plus). • Hands-on experience with crypto wallets (create, deposit, withdraw, transfer, transaction history). • Understanding of blockchain utilities, smart contract interactions, and crypto payment services. • Strong knowledge of RESTful APIs, microservices, and cloud deployment (AWS/GCP/Azure). • Fast learner, problem solver, and adaptable to Web3-specific requirements. Nice to Have: • Experience with HD (Hierarchical Deterministic) wallets. • Prior work in Web3, DeFi, or blockchain-based products. What We Offer: • Work on innovative Web3 projects at scale. • Ownership of backend systems and architecture. • Flexible and collaborative work culture. • Opportunity to build real-world crypto solutions used by global users.

Requirements

• Node.js
• Web3
• Blockchain
• RESTful APIs
• Microservices

Qualifications

• 4+ years of backend development experience
• Hands-on experience with crypto wallets

Preferred Technologies

• Node.js
• Web3
• Blockchain
• RESTful APIs
• Microservices

Benefits

• Flexible work culture
• Ownership of backend systems

About the company

MarsDevs is a remote-first, offshore digital product development company specializing in building MVPs, mobile and web applications, and SaaS products for startups and SMBs. They are committed to delivering high-quality code and long-lasting technical architectures.