Core Java Developer at Flow Traders

Amsterdam, Netherlands

Posted on May 22 2019 (about 5 years ago)

Flow Traders is a leading principal trading firm with Headquarters in Amsterdam and offices worldwide in New York, Singapore, Hong Kong, London and Cluj, Romania.

What will you do?

Software engineers at Flow Traders are working on applications that support the core business of the company. Our systems make it possible for Flow Traders to be present and competitive on exchanges worldwide. There is all kinds of code to write, from systems on (or close to) the critical path from receiving market data to placing orders, to systems handling huge amounts of data in a reliable, performant and traceable manner.

Our future colleague will be writing code, creating new designs and maintaining existing applications with a focus on performance and stability. Our business users are typically only a walk away, which helps create short feedback loops and makes you see how your changes provide value in the shortest time possible.

To enable that, we strive to follow software engineering best practices, while being encouraged by the working environment, working with the latest technology and receiving continuous support from all parts of the Flow Traders organisation.                                      

How you do it

We work in small teams, grouped by business area. Each team is typically responsible for a set of related applications and works in tight collaboration with business owners. We maintain libraries shared across the teams to enable code re-use and to have a common view on application architecture. We write extensive unit tests, and have a QA team that supports us with integration testing. We follow agile practices, tailored to the problem area and preferred team approach.

Some of the technologies we use in the development process:

  • Java 8
    • Guava, Jetty, Lucene, Mockito, SLF4J;
    • Spring MVC, Hibernate;
    • Swing, JavaFX, Mustache;
  • Maven, Git
  • Atlassian stack
    • Bitbucket for code review. We do all work in pull requests, which are reviewed by other developers;
    • Bamboo for continuous integration;
    • JIRA, Confluence;
  • SonarQube for continuous code quality inspection
  • IntelliJ IDEA
  • Python for scripts/testing
  • MariaDB, Cassandra

A day in the life

Morning normally starts with a stand-up meeting with your team. This is an opportunity to catch up on the development progress, raise problems and discuss plans for the day. A business representative is also present, so questions to trading can be resolved instantly. After stand-up, you go back to your desk to program, review code on pull requests submitted by colleagues, and discuss functionality with traders. Sometimes a production issue is raised by support, and help from development is needed to provide advice. At lunch time, you join your team for lunch in the lounge and enjoy a company-provided lunch. During the day, if there are no pressing issues or you feel that you need a break, you can unwind at the pool table or table tennis or do a workout at the gym. After the day is done you can join your colleagues to celebrate a successful release or just socialize at our bar.

What you need to succeed

  • University Degree in Computing Science or equivalent;
  • 3+ years post-graduation work experience;
  • Core Java experience;
  • Experience in parallel and multi-threaded programming;
  • Knowledge of algorithms and data structures;
  • Interest in achieving maximum performance from available hardware and software;
  • Ability to communicate with technical and business colleagues;
  • Working experience in professional software development;
  • Fluency in English.

We offer

Flow Traders offers you an exciting job and lots of opportunities within the most dynamic of environments with an excellent compensation package. We like to think that talent grows at Flow and stays at Flow. To ensure this, we provide our employees with the best working environment, the latest technology, continuous support, and we go out of our way to retain the small business feeling with which we started. We offer a competitive salary and reserve a percentage of our business results for our bonus pool.


Flow Traders is a principal trading firm. We are a leading global technology-enabled liquidity provider specialized in Exchange Traded Products (ETPs). We continuously provide liquidity to the major financial markets. Our sophisticated in-house technology platform enables us to quote prices on many exchanges simultaneously. We also quote bid and ask prices off-exchange to institutional counter-parties on request. Robust risk management is at the core of our business, and our risk functions are closely integrated into our platform. Our headquarters in Amsterdam and offices in New York, Singapore, Hong Kong, London and Cluj, accommodate over 400 employees.

Flow Traders grew to be as successful as we are today out of the expertise and experience of our founding partners. Our non-hierarchical approach stimulates innovation and achievement. We invest in our talented, highly motivated people since they hold the key to our success. Our demanding, sophisticated work continuously puts us to the test. We wouldn't have it any other way. We. Love. This. Job.


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