Software Engineer (Full Stack) - ECommerce / AI

Blockchain Solutions Ltd.; Hong Kong; On-site; HKD 420,000 - 620,000; Full time

Benefits offered by this job

5-day Work Week

Flexible Working Hours

Medical Insurance

Public Holiday & Annual Leave

Mandatory Provident Fund Contribution

Job summary

Blockchain Solutions Ltd. in Hong Kong is seeking an experienced Full-Stack Developer to build end-to-end features for web portals and mobile apps using React, Node.js, and Python.

You will own frontend, backend, and DevOps tasks, collaborate with designers, PMs, and stakeholders, implement payment integrations, and advance AI workflows with RAG pipelines and MCP tooling. Proficiency in Cantonese, English, and Mandarin is required, with strong collaboration and an agile mindset in a fast-paced

Qualifications

• Bachelor’s degree in Computer Science, Information Technology, Software Engineering, or a related discipline.
• Minimum 2–3+ years of professional hands-on full-stack software development experience.

Responsibilities

• Full-Stack and Mobile Development. Build and maintain end-to-end features across web platforms and mobile apps.
• Cross-Functional Collaboration. Collaborate with UI/UX designers, project managers, and stakeholders.
• Backend and API Architecture. Design, build, and maintain scalable RESTful APIs using Node.js (TypeScript) and Python.
• Payment and System Integrations. Implement payment gateway integrations and third-party services.
• AI and LLM Engineering. Integrate LLMs, build RAG pipelines, and MCP tooling.
• Database and DevOps. Design and optimize databases while maintaining CI/CD pipelines.

Skills

JavaScript/TypeScript

React.js

Next.js

Vue.js

Cross-functional collaboration

Agile mindset

Languages: Cantonese, English, Mandar"

Education

Bachelor’s degree in Computer Science, Information Technology, Software Engineering, or related discipline

Tools

Node.js (TypeScript)

Nest.js

Express.js

Python

PostgreSQL

MongoDB

Prisma

TypeORM

Sequelize

Docker

AWS

GCP

Cloudflare

GitHub

GitLab

Figma

Jira

ClickUp

Job description

JOB HIGHLIGHTS

• Dynamic Industry. A unique opportunity in the fast-growing e-commerce and AI innovation space.
• True End-to-End Ownership. Full-stack development spanning web platforms, mobile apps (React Native), backend APIs, and cloud deployment.
• Modern AI Engineering. Hands-on experience building RAG pipelines, AI agents, and Model Context Protocol (MCP) tooling.

KEY RESPONSIBILITIES

• Full-Stack and Mobile Development. Build and maintain end-to-end features across web platforms (customer portals, admin tools) and mobile apps (React Native for iOS and Android).
• Cross-Functional Collaboration. Collaborate with UI/UX designers, project managers, and stakeholders to deliver intuitive, high-impact products.
• Backend and API Architecture. Design, build, and maintain scalable RESTful APIs using Node.js (TypeScript) and Python.
• Payment and System Integrations. Implement payment gateway integrations (billing, subscriptions, invoicing) and third-party services (SSO, messaging, webhooks).
• AI and LLM Engineering. Integrate LLMs, build RAG pipelines, and develop AI workflows and MCP tooling.
• Database and DevOps. Design and optimize databases (PostgreSQL, MongoDB) while maintaining code quality through automated testing and Docker CI/CD pipelines.

JOB REQUIREMENTS

Education and Core Experience

• Bachelor’s degree in Computer Science, Information Technology, Software Engineering, or a related discipline.
• Minimum 2–3+ years of professional hands-on full-stack software development experience.

Frontend and Mobile

• Proficient in modern JavaScript/TypeScript and frontend frameworks: React.js, Next.js, or Vue.js, alongside modern HTML5 and CSS3.
• Hands-on experience in cross-platform mobile development with React Native, including mobile app build and store launch (iOS / Android).

Backend and Databases

• Proficient in backend development with Node.js (TypeScript) / Nest.js / Express.js; working knowledge of Python is an advantage.
• Solid understanding of relational and non-relational databases (PostgreSQL, MongoDB).
• Experienced with ORM and query-builder tools such as Prisma, TypeORM, or Sequelize.

AI Engineering and DevOps

• Practical knowledge of AI engineering: RAG pipelines, vector search, LLM integrations, AI agents, or MCP architecture.
• Hands-on familiarity with Docker, containerized workflows, and cloud deployment platforms (AWS / GCP / Cloudflare).
• Comfortable with developer toolchains: GitLab / GitHub, Figma, Jira, and ClickUp.

Languages and Soft Skills

• Proficient in written and spoken Cantonese (native), English, and Mandarin.
• Strong analytical, debugging, and problem-solving mindset with high attention to detail.
• A collaborative team player with a proactive attitude who thrives in an agile, fast-paced environment.

Our Benefits

• 5-day Work Week
• Flexible Working Hours
• Medical Insurance
• Public Holiday & Annual Leave
• Mandatory Provident Fund Contribution