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- Tasks: Design and build robust features across web and mobile applications using Scala and React.
- Company: Join FlexTrade, a leader in innovative trading solutions with a fun and collaborative culture.
- Benefits: Competitive salary, flexible work environment, and opportunities for professional growth.
- Why this job: Lead the evolution of cutting-edge web and mobile apps that make a real impact.
- Qualifications: Experience in full stack development, particularly with Scala and React.
- Other info: Be part of a dynamic team focused on mentorship and continuous improvement.
The predicted salary is between 36000 - 60000 £ per year.
FlexTrade Systems is a provider of customized multi-asset execution and order management trading solutions for buy- and sell-side financial institutions. Through deep client partnerships with some of the world’s largest, most complex and demanding capital markets firms, we develop the flexible tools, technology and innovation that deliver our clients a competitive edge. Our globally distributed engineering teams focus on adaptable technology and open architecture to develop highly sophisticated trading solutions that can automate and scale with your business strategies.
At FlexTrade, we hold our values close to heart, with pride and gratitude, as they guide us in everything that we do. We are dedicated to giving our clients a competitive edge, taking ownership of our responsibilities, being flexible to adapt to an ever-changing environment and technology, bringing integrity to every interaction and we continue to improve, grow together and collaborate as one team. All of these while having fun truly makes FlexTrade a wonderful place to work.
The Team: We are looking for an amazing developer to join our team building FlexTrade's OEMS platform, FlexONE, which is our state-of-the-art, fully integrated Order Management System and Execution Management System. This system was built from the ground up starting in 2013 and is written entirely in Scala. The FlexONE team is split between our Milwaukee office, where the product was first, and our London office, which is now predominantly responsible for development of the UI for the application. The London team is an experienced group of Java and Scala developers, with a deep understanding of UI and UX design. We deliver our software using agile methodologies, and we encourage best practices such as TDD, code reviews and pair programming for knowledge sharing and learning. Our team owns all aspects of the features they work on, from designing solutions to meet customer or product requirements, through implementation, QA and delivery. Each team member works on every part of the system.
About You: As Senior Web Developer, be part of our FlexONE team and own critical product surfaces across our web and mobile applications. You’ll work end-to-end across a Scala + Play Framework backend, and a React + AG-Grid front-end, using gRPC for communication with our core product's backend systems. You will lead the technical direction as we build our Web app from an MVP to a comprehensive companion to the desktop application, as well as continuing the evolution of our Mobile app.
Responsibilities:
- Design & Build: Deliver robust, maintainable features across the stack (Scala/Play backend, React/AG-Grid frontend)
- Mobile Migration: Define the path from Codename One to a JS-compatible framework (likely React Native), including architecture, incremental migration strategy, and performance/UX parity
- Quality & Reliability: Champion code quality, testing, observability (metrics, logs, tracing), and performance across the stack
- Team Growth: Mentor engineers, assist with hiring, onboarding, and capability development as the team scales.
- Collaboration: Partner closely with the Desktop application development team to ensure feature compatibility and parity
Tech Stack:
- Backend: Scala, Play Framework, REST/JSON and gRPC
- Frontend: React, TypeScript, AG-Grid
- Mobile: Current app in CodenameOne, target migration to React Native (or similar JS-based cross-platform framework)
- Tooling: Jenkins, GitLab, SonarQube, IntelliJ IDEA
Deep Full Stack expertise, experience building & deploying production web apps, with significant experience in React and modern TypeScript. Strong experience in Scala (or any JVM language including core Java). Mobile Capability: Experience building or maintaining cross-platform Mobile Apps. Architecture & Design: Solid grasp of API design, web & mobile architecture, as well as good UX design. Communication: Clear, pragmatic communicator who collaborates well with both engineers and non-engineers.
FlexTrade Systems, Inc. is an equal opportunity employer and makes employment decisions without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, protected veteran status, disability status, or any other status protected by law.
FlexTrade UK Ltd. conducts a pre-employment screening which consists of a Criminal History, Background and Credit Check for successful candidates.
Senior Software Developer (Full Stack / Web) in London employer: FlexTrade
Contact Detail:
FlexTrade Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Software Developer (Full Stack / Web) in London
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech industry, especially those who work at FlexTrade or similar companies. A friendly chat can lead to valuable insights and even referrals that could get your foot in the door.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your best projects, especially those involving Scala, React, or mobile apps. This gives potential employers a taste of what you can do and sets you apart from the crowd.
✨Tip Number 3
Prepare for the interview by brushing up on your technical knowledge and soft skills. Be ready to discuss your experience with agile methodologies, TDD, and how you’ve collaborated with teams in the past. Confidence is key!
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you’re genuinely interested in joining the FlexTrade team.
We think you need these skills to ace Senior Software Developer (Full Stack / Web) in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV is tailored to the Senior Software Developer role. Highlight your experience with Scala, React, and any relevant projects that showcase your full stack expertise. We want to see how your skills align with what we're looking for!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you're passionate about working at FlexTrade and how you can contribute to our team. Be sure to mention your experience with agile methodologies and mentoring, as these are key to our culture.
Showcase Your Projects: If you've worked on any interesting projects, especially those involving web or mobile applications, make sure to include them in your application. We love seeing real-world examples of your work and how you've tackled challenges in the past.
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way to ensure your application gets into the right hands. Plus, it shows us you're serious about joining the FlexTrade family!
How to prepare for a job interview at FlexTrade
✨Know Your Tech Stack
Make sure you’re well-versed in Scala, Play Framework, React, and TypeScript. Brush up on your knowledge of gRPC and REST/JSON as well. Being able to discuss your experience with these technologies confidently will show that you're the right fit for the role.
✨Showcase Your Problem-Solving Skills
Prepare to discuss specific challenges you've faced in previous projects, especially those related to full-stack development. Highlight how you approached these problems, the solutions you implemented, and the outcomes. This will demonstrate your ability to think critically and adapt.
✨Emphasise Team Collaboration
FlexTrade values teamwork, so be ready to talk about your experiences working in agile environments. Share examples of how you've collaborated with cross-functional teams, mentored others, or contributed to team growth. This will show that you align with their company culture.
✨Ask Insightful Questions
Prepare thoughtful questions about the FlexONE platform, the team dynamics, and the company's future direction. This not only shows your genuine interest in the role but also helps you assess if the company is the right fit for you.
