Senior Full-Stack Engineer - Impact Finance (Hong Kong)

IO Tech Solutions Limited; Hong Kong; On-site; HKD 900,000 - 1,250,000; Full time

Job summary

IO Tech Solutions Limited in Hong Kong seeks a Senior Full Stack Developer to help build the next generation of impact finance. You will own end-to-end development, integrating complex REST APIs, and delivering secure backend services and scalable frontend solutions.

The role emphasizes collaboration with product and design teams, mentoring junior developers, and thorough documentation of architecture. On-site in Hong Kong with a strong, modern stack.

Qualifications

• 6+ years of professional full-stack development experience shipping production-grade apps.
• Python: 5+ years for backend services and scripts.
• Front-End: 6+ years with advanced CSS and TailwindCSS.
• AWS Cloud Services: 6+ years designing/managing DynamoDB, EC2, S3, Lambda, SES, SNS, ECR.
• Containers & Microservices: 5+ years deploying Docker-based microservices.
• API Integration: 5+ years integrating complex REST APIs.
• Database Management: experience with DB schema versioning and data reconciliation.
• Testing: 5+ years with Cypress/Jest and strong test coverage.
• Git: version control; experience with Figma for design handoff (≥3 years).

Responsibilities

• Integrating complex, third-party REST APIs with robust authentication, error handling, and data sync.
• Developing secure backend services and serverless functions for transactions and policy enforcement.
• Implementing security protocols for credentials and sensitive data using AWS Secrets Manager.
• Deploying and managing scalable application infrastructure on AWS.
• Developing high-quality, responsive front-end and back-end applications.
• Collaborating with product managers and designers to define requirements and deliver UX.
• Mentoring junior developers via constructive code reviews and promoting technical excellence.
• Documenting implemented logic and enhancing architecture documentation.

Skills

Team collaboration

Code reviews

Security best practices

Testing mindset

Documentation

Tools

Docker

AWS Cloud

TailwindCSS

Figma

Cypress

Jest

DynamoDB

EC2

S3

Job description

IO Tech Solutions Limited in Hong Kong seeks a Senior Full Stack Developer to help build the next generation of impact finance. You will own end-to-end development, integrating complex REST APIs, and delivering secure backend services and scalable frontend solutions.

The role emphasizes collaboration with product and design teams, mentoring junior developers, and thorough documentation of architecture. On-site in Hong Kong with a strong, modern stack.