Full-Stack Engineer (High-Performance Web Systems)

Hong Kong Island, Hong Kong SAR, Hong Kong

Full-Stack Engineer (High-Performance Web Systems)

Job Description

What You Will Do

Legacy Transformation: Reverse-engineer complex business logic from C# WPF systems and architect modern, scalable equivalents in a web-native environment.

Data Pipeline Engineering: Architect and optimize the end-to-end WebSocket pipeline, implementing advanced techniques like binary serialization (Protobuf), message routing, and bounded channel queuing.

High-Frequency UI: Develop real-time data visualizations and grids that handle thousands of updates per second with zero UI lag using Web Workers and custom rendering strategies.

Infrastructure Collaboration: Partner with trading and infra teams to bridge the gap between low-latency backend services and the end-user experience.

Quality & Resilience: Establish automated testing frameworks for real-time systems and provide tier-2 production support to ensure 24/7 system reliability.

Requirements

Backend Expertise

5+ years of professional experience in .NET / C# development, specifically with ASP.NET Core Web API.

Strong proficiency with Entity Framework Core and MSSQL (or similar relational databases).

Experience implementing and managing Redis or similar caching solutions.

Familiarity with message brokers such as RabbitMQ, Kafka, or other pub/sub systems.

Frontend Mastery

Deep proficiency in Vue.js (Vue 3) and TypeScript.

Experience with Pinia for state management and Tailwind CSS for styling.

Hands-on experience with high-performance data grid libraries (e.g., VXE Table).

Real-Time Systems & Performance

Proven track record building real-time applications using WebSockets, SSE, or similar streaming technologies.

Expertise in high-performance rendering techniques: virtual scrolling, efficient DOM updates, and handling massive real-time datasets.

Experience with Web Workers for offloading CPU-intensive tasks to maintain UI responsiveness.

Knowledge of Protobuf serialization and working with binary data protocols.

Architecture & Security

Solid understanding of modern authentication systems, including OAuth 2.0, SAML, and SSO.

Ability to establish and maintain automated testing practices and frameworks.

Preferred Qualifications

Previous experience in FinTech, Crypto, or Financial Services.

Experience building or maintaining trading platforms or high-frequency data dashboards.

Required Skills

API Data FinTech Routing Support Development Kafka Vue.js Authentication Entity Framework RabbitMQ Financial Services Collaboration Trading ASP.NET Redis Reliability Architecture Infrastructure CSS TypeScript C# Databases Security Testing Engineering Business Management

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