Founding Backend Engineer
Founding Backend Engineer

Founding Backend Engineer

London Full-Time 48000 - 84000 £ / year (est.) No home office possible
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At a Glance

  • Tasks: Design and code systems for high-volume trading; ensure reliability and performance.
  • Company: Join QFEX, a pioneering fintech team with elite builders from top financial firms.
  • Benefits: Enjoy a lunch allowance, 25 days holiday, and a vibrant office near Liverpool Street.
  • Why this job: Be part of a revolutionary team shaping the future of finance with a strong culture.
  • Qualifications: STEM degree, 3+ years in high-traffic systems, and experience with languages like Go or C++.
  • Other info: Bonus points for fintech experience and knowledge in Kubernetes or cyber security.

The predicted salary is between 48000 - 84000 £ per year.

QFEX is building a team of founding engineers who can design, code and own systems that will soon process billions of dollars in trading volume every single day. This is an incredible opportunity to work alongside an elite, well-funded team of builders from some of the biggest financial companies in the world and change the course of financial history.

What You’ll Do

  • Reliability & performance: Design fault-tolerant, low-latency, always-available services; write load tests and chaos suites; tune until p99 is boring.
  • Developer experience: Set up and maintain CI/CD, IaC, monitoring, and on-call processes that future teammates will thank you for.
  • Technical direction: Evaluate tools, set coding standards, and guide architectural decisions as we scale.
  • Culture & hiring: Share and receive new knowledge and experiences, set impeccable cultural standards, and help interview the next engineers.

What You’ll Need

  • A STEM degree from a University that is highly ranked in your home country.
  • Experience with a high-performance language like Go, C or C++.
  • 3+ years building and running high-traffic or real-time production systems (including DevOps experience).
  • The desire to create and impose a responsible culture of tests, metrics, and graceful degradation.
  • Impeccable levels of trust in yourself and others, including the ability to make decisions in minutes, not days.
  • UK work authorisation and willingness to work Monday–Friday from our office next to Liverpool Street Station.

Bonus points

  • Fintech, exchange, or low-latency experience.
  • Experience in Rust or similar language.
  • Deep Kubernetes or infrastructure-as-code experience.
  • Cyber security and compliance know-how.

Benefits

  • Lunch allowance and regular company events.
  • The ability to grow alongside some of the best minds in fintech, as well as set standards and culture.
  • Brand-new office near Liverpool Street with top-tier hardware and a stocked kitchen.
  • 25 days holiday + bank holidays.

Founding Backend Engineer employer: QFEX

At QFEX, we pride ourselves on being an exceptional employer, offering a unique opportunity for Founding Backend Engineers to shape the future of fintech alongside a talented team from leading financial firms. Our vibrant work culture fosters innovation and collaboration, with ample opportunities for personal and professional growth, all within our state-of-the-art office near Liverpool Street Station. Enjoy competitive benefits, including a lunch allowance, generous holiday entitlement, and the chance to set cultural standards in a dynamic environment.
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Contact Detail:

QFEX Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Founding Backend Engineer

✨Tip Number 1

Familiarise yourself with the latest trends in high-performance programming languages, especially Go, C, and C++. Being able to discuss recent advancements or projects you've worked on in these languages will show your passion and expertise during interviews.

✨Tip Number 2

Highlight any experience you have with CI/CD processes and infrastructure as code. Be prepared to share specific examples of how you've implemented these practices in previous roles, as this will demonstrate your ability to contribute to the team's developer experience.

✨Tip Number 3

Showcase your understanding of fault-tolerant systems and low-latency services. Discuss any relevant projects where you designed or optimised such systems, as this aligns closely with the responsibilities of the role and will set you apart from other candidates.

✨Tip Number 4

Prepare to discuss your approach to building a positive team culture and how you've contributed to hiring processes in the past. This is crucial for a founding engineer role, so having concrete examples will help illustrate your fit for the company's values.

We think you need these skills to ace Founding Backend Engineer

Proficiency in high-performance programming languages (Go, C, C++)
Experience with building and running high-traffic production systems
DevOps expertise
Knowledge of fault-tolerant system design
Ability to write load tests and chaos suites
CI/CD setup and maintenance
Infrastructure as Code (IaC) experience
Monitoring and on-call process management
Strong architectural decision-making skills
Experience in fintech or trading systems
Understanding of low-latency system requirements
Familiarity with Kubernetes
Cyber security and compliance knowledge
Strong communication and collaboration skills
Ability to work under pressure and make quick decisions
Commitment to creating a responsible testing and metrics culture

Some tips for your application 🫡

Understand the Role: Before applying, make sure to thoroughly understand the responsibilities and requirements of the Founding Backend Engineer position. Familiarise yourself with the technologies mentioned, such as Go, C, or C++, and consider how your experience aligns with their needs.

Tailor Your CV: Craft your CV to highlight relevant experience in high-performance languages and real-time production systems. Emphasise any DevOps experience and your ability to design fault-tolerant services, as these are key aspects of the role.

Write a Compelling Cover Letter: In your cover letter, express your enthusiasm for the fintech industry and your desire to contribute to QFEX's mission. Mention specific projects or experiences that demonstrate your technical skills and cultural fit within a team.

Showcase Your Problem-Solving Skills: During the application process, be prepared to discuss how you've tackled challenges in previous roles. Highlight instances where you made quick decisions or implemented effective solutions in high-pressure environments.

How to prepare for a job interview at QFEX

✨Showcase Your Technical Skills

Be prepared to discuss your experience with high-performance languages like Go, C, or C++. Bring examples of past projects where you designed fault-tolerant systems or worked on high-traffic production environments.

✨Demonstrate Problem-Solving Abilities

Expect technical questions that assess your ability to make quick decisions. Share specific instances where you had to troubleshoot issues under pressure and how you ensured system reliability.

✨Emphasise Cultural Fit

QFEX values a strong team culture. Be ready to discuss how you can contribute to a responsible culture of testing and metrics. Highlight experiences where you’ve helped build or maintain a positive team environment.

✨Prepare for Behavioural Questions

Since the role involves guiding architectural decisions and mentoring future engineers, prepare for questions about leadership and collaboration. Think of examples where you’ve successfully led a project or mentored others.

Founding Backend Engineer
QFEX
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Q
  • Founding Backend Engineer

    London
    Full-Time
    48000 - 84000 £ / year (est.)

    Application deadline: 2027-07-12

  • Q

    QFEX

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