Senior Backend Engineer

Hyphen Connect; Hong Kong; On-site; HKD 900,000 - 1,200,000; Full time

Job summary

Hyphen Connect is seeking a senior backend engineer to architect and develop high-concurrency microservice systems. You will lead core module design, optimize performance, and ensure high availability.

You will work on service decomposition, governance, tracing, circuit breakers, and middleware integrations; you will optimize JVM performance, and collaborate across teams. Candidates should have 5+ years of experience in large-scale systems, strong Java/Spring Boot skills, and hands-on experience

Qualifications

• Bachelor's degree in Computer Science or related field with 5+ years of large-scale system development.
• Strong experience with high-concurrency architectures and Java ecosystem.
• Proficient in Spring Boot / Spring Cloud, and JVM internals.
• Hands-on with Kafka/RocketMQ, Redis (cluster mode) and MySQL sharding.
• Knowledge of blockchain data querying and on-chain analysis is a plus.

Responsibilities

• Lead architecture and development of high-concurrency microservice systems.
• Engage in service decomposition, governance, tracing, circuite breaking, and fallbacks.
• Design distributed systems handling millions of QPS with low latency.
• Tune performance, plan capacity, troubleshoot, and DR drills to hit 99.99% uptime.
• Integrate middleware: queues, caching, service registry, config centers.
• Promote code quality and best practices across the team.

Skills

High concurrency

Microservices

Java ecosystem

Spring Boot

Spring Cloud

Kafka

Redis

MySQL

Blockchain knowledge

Distributed tracing

Circuit breaking

Performance tuning

Collaboration

Education

Bachelor's degree in Computer Science

Tools

Kafka/RocketMQ

Redis

MySQL

Job description

Key Responsibilities

• * **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.

### **Job Requirements**

• * **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.