Senior Java Backend Developer

Updated 4 days agoIT » Back-end Engineer
XREX Inc. work environment photoXREX Inc. work environment photoXREX Inc. work environment photoXREX Inc. work environment photo

Job Description

Want to develop the best crypto products ever, right here in Taiwan, and offer them to millions of users worldwide?

Want to be based in Taiwan but work in a silicon-valley-like environment, and release world-class products?

Want to work with some of the world's best front end and full stack developers?

Come change the world with us! Join this fast growing startup founded by software veterans and funded by top VCs, Skype co-founders, and the Taiwanese government (NDF)!

We’re hiring for very experienced back-end developers who have an eye for performance, utility and practicality rather than regurgitating programming patterns from textbooks. Ideally you will have experience in both a) Golang and some Java b) AWS current tech such as Lambda and Serverless programming, programmed infrastructure, and DevOps as a philosophy.

Other than Golang, the exact mix of other skills does not matter, so long as your tool chest includes a mix of abilities. Be willing to attack anything that comes your way, learn on the fly and get things done. Come talk to us if you love engineering and want to push your skill set in a dynamic fast-paced environment.


  • Develop and build robust, scalable, clean and understandable server code.
  • Design and implement RESTful APIs that is simple, intuitive, easy to test and fit to
    business requirements.
  • Troubleshoot, debug and optimize server code.
  • Design and maintain well-structured, scalable and efficient database schemas.
  • Write API documentation for API users, server documentation for Ops users.
  • Participate and collaborate with functional teams.
  • Take ownership and responsibility for our backend development activities.
  • Report to Backend Team Leader.

Location: Taipei

About XREX
Our culture



  • 6+ years experience in backend code developing role.
  • Strong Java, Spring / Spring Boot development experience.
  • Strong technical development experience on effectively writing code, best practices code refactoring and GoF Design Patterns.
  • Proven problem solving and analytical skills.
  • Excellent knowledge of RDBMS such as MySQL.
  • Knowledge of RESTful APIs is a must.
  • Knowledge of NoSQL such as Redis, MongoDB, DynamoDB.
  • Experience using Git / Git Flow to manage asynchronous collaboration across teams.
  • Experience in Agile development lifecycle methodology.
  • Moderate English.

【Good to have】

    • Experience in AWS cloud computing services.
    • Experience in Python, Go and micro-services development.
    • Experience with API documentation tools such as Swagger.
    • Knowledge with database versioning tools such as Flyway, LiquiBase.
    • Knowledge with CI/CD deployment flow.
    • Experience in building large, scalable distributed systems with good understanding of
      microservices architecture and associated principles.
    • Knowledge of managing data consistency in distributed systems.
    • Experience working with asynchronous systems.

    Personal Invitation Link

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    XREX Inc.


    About us

    Our culture:

    * XREX is a fast-growing organization, on a mission to make our world a better place
    * You will gain experience in building an international brand, product, and user base
    * Stock options
    * You will gain experience in blockchain and crypto-related products, technologies, and markets
    * You will be working in a cutting-edge product development and growth acquisition environment using the very latest tools, methodologies, and processes

    About XREX:

    XREX helps blockchain-focused organizations save time and money with product development, production maintenance, security, scalability, and compliance efforts.

    XREX Crypto Services (XCS) is a compliant, secure, scalable stack of PaaS and SaaS offerings for organizations that build and run crypto markets (spots, futures, options), market-making, banking, custodial services, wallets, clearance and settlement proxies, payment gateways, value transmission services, and/or decentralized apps.

    XCS stacks are offered entirely through cloud-based APIs and billed by usage. After registration, developers can immediately initiate module instances and use APIs; there are no face-to-face meetings, contract negotiations, setup fees, or monthly minimums.

    XCS allows organizations to focus on building core business functions--not waste time and money in developing, maintaining, scaling, and securing the underlying stacks.

    Many XCS services are implemented using XBLOCK, a blockchain designed for high volume, low latency clearance and settlement across financial institutions.

    XREX also operates a standalone market -- the XREX Exchange -- which provides professional access to spot, futures and options trading.

    XREX investors include prominent VCs such as:
    * Taiwan Government National Development Fund
    * CDIB Capital Group (TWSE: 2883)
    * E.Sun Financial Holding (TWSE:2884)
    * ThreeD Capital (CSE:IDK)
    * Systex (TWSE:6214)
    * Rocket Internet (NYSE:RKTA)
    * Global Founders Capital (Berlin)
    * Seraph Group (US)
    * Metaplanet Holdings (Estonia)
    * AppWorks (Taipei)
    * WI Harper (San Francisco)
    * BlackMarble (Taipei)
    * New Economy Ventures (Taipei, Tokyo)

    as well as super angels such as:
    * Skype co-founders Toivo Annus and Jaan Tallinn
    * ex Alibaba Board and Taobao Board Andrew Tsuei
    * TUL (TWSE: 6150) Chairman and CEO Ted Chen
    * Phison (TWSE: 8299) Chairman and CEO KS Pan.

    • 天下雜誌:4天誕生6家獨角獸!Xrex創辦人:搶搭印度新創潮,不能複製中國模式(Click)
    • 數位時代(Click)
    • Yahoo(Click)
    • Coindesk(Click)
    • Meet Global by Business Next Media(Click)

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