Location: On-Site
Employment Type: Full-Time
About Us
We are a team dedicated to building innovative digital products with a strong focus on user experience. Our goal is to create high-performance systems that deliver seamless and engaging experiences to our users.
As our team continues to grow, we are looking for a Senior Blockchain / Crypto Backend Developer who will design and build secure, scalable blockchain infrastructure and crypto payment solutions for our products.
What Makes This Role Interesting
- Build production-grade blockchain infrastructure and crypto payment systems
- Work on cutting-edge cryptocurrency and DeFi technologies
- Collaborate with senior developers and product teams to deliver secure, scalable crypto solutions
- Opportunity to shape blockchain architecture, security practices and off-chain data processing
Responsibilities
- Design, implement and maintain blockchain-based backend systems
- Develop and manage smart contracts, ensuring security and efficiency
- Build crypto payment gateways and integrate with multiple blockchain networks
- Implement secure wallet management, key storage and transaction flows
- Ensure high-performance, fault-tolerant architecture for blockchain services
- Develop off-chain indexing and event processing systems (e.g., TheGraph or custom solutions)
- Collaborate with product and frontend teams to deliver crypto-based features
- Participate in code reviews, smart contract audits and testing processes
- Monitor and optimize transaction throughput, latency and gas fees
- Stay up-to-date with the latest blockchain technologies, standards and security practices
Requirements
- 5+ years of backend development experience, with at least 2+ years in blockchain or crypto systems
- Strong experience with smart contract development (Solidity, Rust, or similar)
- Hands-on knowledge of Ethereum, BSC, Solana or other blockchain networks
- Experience building crypto payment solutions, wallets and secure transaction flows
- Proficiency in Node.js, Go or Python for backend services
- Experience with PostgreSQL, Redis or other databases in blockchain contexts
- Familiarity with AWS, Docker, Kubernetes or similar cloud and container technologies
- Strong understanding of cryptography, digital signatures and secure key management
- Experience with monitoring and logging tools, including Graylog or blockchain-specific solutions
- Strong problem-solving, research and analytical skills
- A responsible, collaborative team player with excellent communication skills
Nice to Have
- Experience with 3rd party integrations, including payment providers
- Familiarity with Graylog or similar logging systems
- Knowledge of Docker and Kubernetes
- Familiarity with Jira
- Experience with microservice-based architectures
- Knowledge of Go Lang
