Backend Developer

    • London, United Kingdom


BidFX is a FinTech start-up on a mission to disrupt the foreign exchange market, applying innovative technology to tap FX liquidity. Foreign exchange is the largest financial market in the world, with $5 trillion traded every day. We are a small but fast-growing company with big, global aspirations. We aim to connect the world of finance. We operate a successful core trading platform, with direct connectivity to all major banks, fronted by a sophisticated trading user interface. We seek candidates who wish to help us fulfil our vision and share in our success. We value diversity and offer equal opportunities to all.


As an experience backend engineer you will be responsible for the development of high-performance, low latency, mission critical software at the heart of the BidFX trading system. Our globally distributed, high-available platform consumes 5 billion messages per day. Your contributions could involve working on core trading services, order management, real-time price feeds, database design, cloud-based micro-services, big data handling and more.

You will be educated to Bachelor's degree or higher in Computer Science or a related subject. You will have at least 5 years' experience with advanced Java programming.

Your knowledge of data structures and algorithms will be better than average and you will be experienced with multithreaded programming. You will be enthusiastic, organised and adaptable; a quick learner, who is able to adopt new technology with ease. You will have a flair for writing good, clean code, a dedication to software quality and have a passion for modern development methods. Naturally, you will have good interpersonal and communication skills. BidFX will give you the opportunity to work in a multidisciplinary team on a flagship, trading system. You will be using a cool tech stack, including:

  • Java 8+
  • Junit
  • Docker
  • Kubernetes
  • MySQL

You will code in Java as your primary language but will take a holistic interest in software engineering. You will be practiced in multiple programming and/or scripting languages and will be capable of switching technology stack to meet different project needs. Top developers are just as comfortable coding in Rust, Golang, C++, C#, Swift, Kotlin, JavaScript or Python as they are in Java.


You'll be expected to pair program with peers, practice TDD and CI. Experience of some of all of the following technologies would be an advantage:

  • REST API and Web sockets,
  • Distributed systems,
  • Message oriented middleware,
  • Multithreaded programming,
  • HA fault tolerant systems,
  • Binary data marshalling,
  • Data compression algorithms,
  • IP Security,
  • Big Data,
  • SQL and ORM,
  • Data caching,
  • Linux,
  • Cloud Deployments,
  • Agile development processes, including SCRUM.

For this role you will require hands-on development experience building large, complex high-available services. Full stack development capability could be an advantage but this is mainly a role for an experienced backend specialist. You will assist in designing important aspects of the trading platform, working closely with peers, front-end/mobile developers, product management, QA, and UX/UI designers. As an experienced mid-level developer you may be required to lead small teams, mentor and train junior developers and present your team's progress at regular company stand-ups.

Experience working in finance, in particular with foreign exchange products, would be to your advantage, however, we will offer relevant financial training to the successful candidates.

Our engineers are responsible for solving some of the world's most interesting technical problems. Quality cuts across every aspect of our being. Together we commit to providing an excellent user experience. Client service takes priority but we also value our free time and appreciate that you also have commitments to friends and family. So, we cooperate to complete tasks during normal office hours. To minimise defects, we practice pair programming, TTD and continuous integration. We incorporate instrumentation into all of our systems and trust in automation to provide operational efficiency. Our engineers are backed by dedicated first and second level support plus test automation teams so developers can focus on the creative aspects where they add most value.

Should you join us you'll get a generous salary that compares well with the best in our sector. A full benefits package covering pension, private health care and dental cover. Participation in an annual bonus scheme that rewards performance with cash or options.

We recognise that the best developers thrive on continuous skills improvement. BidFX commit to investment in your future. In addition to training and mentoring, we allocate a budget for you to spend on your personal career development.

You'll get 25 days of annual leave (rising to 30 with service) and 3 personal days, on top of national holidays. Small perks include free breakfast and fresh fruit, office lunches, Friday drinks and regular social activities. Our technical team is located in the heart of London theatre land, near Covent Garden. The area is well connected, is pleasant with a cool vibe, has lots of good eateries and plenty of shopping opportunities.

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