Senior Software Engineer, R&D

About eSign.AI

eSign.AI helps businesses prepare, sign, verify and manage digital agreements. Our platform supports electronic signatures, identity verification, document workflows and integrations with enterprise systems.

About the role

You'll build and improve the backend services that power our international electronic signature platform. Your work will cover document processing, signing workflows, identity verification, audit trails and enterprise integrations. You'll collaborate with product and engineering teams in Singapore and China to take features from technical design through release and production support.

What you'll do

• Design, develop and maintain secure, scalable backend services for the digital agreement platform.
• Build and improve features for document processing, signing workflows, identity verification and audit trails.
• Develop REST APIs and integrations with enterprise CRM, HR and document management systems.
• Work with product and engineering colleagues to translate business requirements into technical designs and deliver features into production.
• Evaluate technologies and make improvements that strengthen platform performance, reliability and maintainability.
• Conduct code reviews, write automated tests and improve deployment and monitoring practices.
• Investigate production issues, address their root causes and document technical decisions for colleagues across teams.

What you'll bring

• At least five years of professional software development experience, with a strong focus on backend engineering.
• A degree in Computer Science, Software Engineering or a related field, or equivalent practical experience.
• Strong programming skills in Java or a comparable backend language.
• Experience designing REST APIs and working with relational databases, distributed systems and cloud environments.
• Understanding of application security, authentication, access control and secure data handling.
• Experience with automated testing, CI/CD and production troubleshooting.
• Strong problem-solving skills and the ability to communicate technical decisions in English.
• Experience with electronic signatures, public key infrastructure (PKI), document processing or enterprise SaaS is an advantage.

How to apply

• Please send your CV via LinkedIn message. Include a brief example of a backend service, API or enterprise integration you designed or helped bring into production.