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Job Responsibilities: Responsible for the design, development, and daily maintenance of Web3.0/blockchain/telecommunications related systems, ensuring stability and efficiency. Participate in the upgrades, performance optimization, and code refactoring of existing backend systems to enhance scalability. Independently complete module design, coding, and related technical documentation based on product requirements. Collaborate closely with product, testing, and front-end teams to create secure and user-friendly products. Focus on system security and performance, continuously optimizing databases, servers, and networks. Job Requirements: Bachelor’s degree in Computer Science or related field 2–5 years Java development experience preferred (candidates with less experience may be considered for Junior positions) Experience in performance optimization for: Databases (MySQL, etc.) Linux servers Network communication Solid Java fundamentals (multithreading, concurrency, collections, networking, I/O, JVM). Experience designing distributed systems and applying related technologies. Familiar with SpringMVC, SpringBoot, SpringCloud, Docker , Mybatis, Dubbo, ZooKeeper; understanding of internals a plus. Knowledge of high-performance, high-concurrency system design (distributed caching, ElasticSearch, message queues). Proficiency in SQL, caching, messaging, queues, and async frameworks. Putonghua is a must .
Here's where they are and how to stand out in your next interview.
24.795Jobs
9.577IN
74%EN
That number includes positions in India (9,577), Poland (3,429), the United States (1,753), Singapore (787), and Brazil (779). If you're looking to move or work remotely, check which countries match your goals — then filter WorkMundi by location to see what's actually hiring near you.
Most developer ads you'll see are written in English: 18,397 of the 24,795. That doesn't tell you whether the job itself requires you to speak English or work in English daily, so read each posting carefully. Don't assume the language of the ad matches the language of the team.
The employers posting the most developer roles are Link Group (369 jobs), Upvanta (257), jobgether (226), and OfferZen (212). If you're applying to any of these, research their hiring patterns. They move fast and post often, which means they're either scaling hard or replacing people who didn't fit.
In your interview, expect this: 'Walk me through the last time you had to debug something that took you more than an hour. What was it, what did you try first, and what would you do differently?' Hiring managers ask this to see if you think systematically or just try random fixes. Have a real example ready with specifics.