Senior Backend Engineer

Hyphen Connect Limited; Hong Kong; On-site; HKD 700,000 - 1,200,000; Full time

Job summary

Hyphen Connect Limited seeks a Senior Software Architect to lead architecture and development of high-concurrency microservice systems in Hong Kong. You will drive service decomposition and governance, define interfaces, and ensure low latency, high throughput, and robust fault tolerance.

Deep expertise in JVM, Spring Boot/Spring Cloud, and middleware like Kafka/Redis is essential. You will collaborate across teams to maintain quality, reliability, and scalable delivery in a demanding production

Qualifications

• Bachelor's degree or higher in Computer Science or related field.
• 5+ years of experience in large-scale internet or high-concurrency system development.
• Strong knowledge of JVM internals, memory models and GC.
• Familiar with on-chain data querying and basic blockchain concepts.

Responsibilities

• Lead or participate in architectural design of high-concurrency microservice systems.
• Engage in service decomposition, interface definition, governance, tracing, circuit breaking and fallbacks.
• Design distributed systems with millions of QPS, low latency, high throughput and high availability.
• Tuning performance, capacity planning, troubleshooting and disaster recovery drills to elevate SLA.
• Integrate middleware components like message queues, caching, service registry, configuration centers.
• Promote code quality, standards and best practices across the team.

Skills

Java

Spring Boot

Spring Cloud

JVM Internals

Distributed Systems

Microservices

System Architecture

Performance Tuning

Blockchain Basics

Education

Bachelor's degree in Computer Science or related field

Tools

Kafka

Redis

MySQL

RocketMQ

Cloud provisioning

Job description

• Architecture & Development: Lead or participate in the architectural design, core module development, and continuous optimization of high-concurrency, high-availability microservice systems.
• Microservice Capabilities: Deeply engage in service decomposition, interface definition, service governance, distributed tracing, circuit breaking, and fallback mechanisms.
• High-Performance Distributed Systems: Design and implement distributed systems supporting millions of QPS, ensuring low latency, high throughput, and high availability.
• Operations & Performance Tuning: Responsible for system performance tuning, capacity planning, troubleshooting, and disaster recovery drills to elevate system SLA to 99.99%+ uptime.
• Middleware Integration: Participate in the selection, integration, and custom development of middleware components (e.g., message queues, caching, service registry, configuration centers).
• Code Quality & Best Practices: Write high-quality, maintainable, and scalable code, while promoting technical standards and best practices across the team.

• Architecture & Development: Lead or participate in the architectural design, core module development, and continuous optimization of high-concurrency, high-availability microservice systems.
• Microservice Capabilities: Deeply engage in service decomposition, interface definition, service governance, distributed tracing, circuit breaking, and fallback mechanisms.
• High-Performance Distributed Systems: Design and implement distributed systems supporting millions of QPS, ensuring low latency, high throughput, and high availability.
• Operations & Performance Tuning: Responsible for system performance tuning, capacity planning, troubleshooting, and disaster recovery drills to elevate system SLA to 99.99%+ uptime.
• Middleware Integration: Participate in the selection, integration, and custom development of middleware components (e.g., message queues, caching, service registry, configuration centers).
• Code Quality & Best Practices: Write high-quality, maintainable, and scalable code, while promoting technical standards and best practices across the team.

• Educational Background: Bachelor's degree or higher in Computer Science or a related field, with 5+ years of experience in large-scale internet or high-concurrency system development.
• Blockchain Technology: Familiar with on-chain data querying and analysis across major public chains (such as EVM-compatible chains, Sui, Solana, etc.). In-depth experience with smart contract calls, contract data querying/analysis, real-time block tracking, and historical block backtesting.
• Technical Vision: Deep understanding of microservices architecture, including core mechanisms such as service governance, distributed transactions, idempotency design, and traffic management.
• High Concurrency Expertise: Proven hands-on experience handling large-scale concurrent requests, with a strong grasp of performance bottleneck analysis and system tuning methodologies.
• High Availability Design: Proficient in high-availability techniques including disaster recovery, fallback, rate limiting, circuit breaking, and multi-active deployment. Real-world experience managing major production outages is required.
• Java Ecosystem: Strong understanding of JVM internals (memory models, GC mechanisms, lock optimization, etc.) and deep proficiency in the Spring Boot and Spring Cloud microservices ecosystem.
• Middleware & Databases: Proficient with Kafka/RocketMQ, Redis (cluster mode), and MySQL (sharding/partitioning). Deep understanding of database optimizations and internals; hands-on capability in deploying and maintaining common middleware via cloud services.
• Collaboration & Communication: Excellent cross-team collaboration skills with a strong drive to execute and land technical solutions efficiently.