Senior Backend Developer
2 days ago
Company Description Muse Wearables is a group of thinkers, doers, and achievers who believe that technology can make the world a better place. Our mission is to lead the future of personal computing beyond mobile phones. We are excited about the potential to make a significant impact through our work and invite you to be a part of this journey. Join us and contribute to shaping an innovative and impactful future.Role Description We are seeking a highly skilled Backend Developer with strong experience in the payments industry. The ideal candidate will have hands-on expertise in Node.js, TypeScript, and Java, a solid understanding of SQL and NoSQL databases, and proven experience in implementing PCI DSS standards for secure payment systems. You will also bring strong knowledge of cryptography and cloud platforms (AWS preferred) to design secure and scalable backend architectures.Key Responsibilities - Design, develop, and maintain secure backend services and APIs for payment processing systems, including card tokenization. - Implement and enforce PCI DSS compliance across backend systems and infrastructure. - Apply cryptography best practices (encryption, hashing, tokenization, HSM usage) to protect sensitive financial data. - Architect and deploy applications in AWS, leveraging services such as EC2, RDS, Secrets Manager, KMS, Lambda, and S3. - Work with SQL (PostgreSQL, MySQL) and NoSQL (MongoDB, Redis) databases, ensuring performance, scalability, and data security. - Collaborate with cross-functional teams (security, DevOps, product) to ensure compliance with industry regulations (PCI DSS, GDPR, PSD2, etc.). - Participate in code reviews, architecture discussions, and design reviews, ensuring high standards for quality and security. - Build automated tests (unit, integration, load) and CI/CD pipelines for reliable delivery. - Troubleshoot production issues and contribute to incident response and root cause analysis.Required Qualifications - Bachelor’s or Master’s degree in Computer Science, Software Engineering, or related field. - 5+ years of professional backend development experience in fintech, banking, or payments industry. - Strong proficiency in Node.js and TypeScript, with additional experience in Java. - Proven expertise with SQL databases (PostgreSQL, MySQL) and NoSQL databases (MongoDB, Redis). - Demonstrated experience implementing PCI DSS controls in production-grade payment systems. - Solid knowledge of cryptography (AES, RSA, ECC, hashing, tokenization, key management, HSM integration). - Hands-on experience with AWS cloud services (EC2, RDS, Lambda, KMS, Secrets Manager, S3, VPC, IAM). - Strong understanding of API design (REST, GraphQL, gRPC), authentication (OAuth2.0, JWT), and secure communication protocols (TLS, mTLS). - Experience with containerization (Docker, Kubernetes) and automated CI/CD pipelines. - Strong problem-solving, debugging, and performance optimization skills.Preferred / Nice-to-Have Skills - Experience with payment gateways, tokenization, and EMVCo standards. - Familiarity with AWS Payment Cryptography services and key management practices. - Exposure to event-driven systems (Kafka, RabbitMQ, etc.) and microservices architectures. - Experience in regulated industries (fintech, banking, payments). Soft Skills - Excellent communication and collaboration skills. - Strong attention to detail and security-first mindset. - Ability to thrive in a fast-paced, compliance-heavy industry. - Proactive ownership mentality with strong accountability.
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