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Senior Backend Engineer - Boom Technologies Ltd

Engineering

13 hours ago4 views

Location: London


At Boom, we don’t hire mercenaries. We hire missionaries.
Engineers who want to architect systems that power a global platform.
We’re building something that redefines how people interact with money, outside of the banking system. That takes backend engineers who can scale, secure, and future-proof critical infrastructure.


Responsibilities :

  • Design, build, and scale backend services with low latency, high throughput, and strong reliability.
  • Implement secure APIs, integrations, and data flows that connect mobile apps with blockchain components.
  • Collaborate closely with product owner, frontend, mobile, and blockchain engineers for seamless product delivery.
  • Champion performance optimization, monitoring, documentation 1and observability.
  • Lead code reviews, mentor teammates, and set engineering best practices.
  • Stay ahead of emerging backend architectures and distributed systems approaches.


Requirements :

  • 5+ years of backend development experience (Node.js, Go, Java, or similar).
  • Strong understanding of scalable system design, microservices, and cloud infra (AWS/GCP/Azure).
  • Expertise in databases (SQL + NoSQL), caching, and data pipelines.
  • Familiarity with security, authentication, and encryption best practices.
  • Problem-solving mindset and ability to thrive in high-intensity, fast-moving environments.

Nice to Have :

  • Experience with event-driven architectures and real-time data.
  • Exposure to blockchain integrations or Web3 APIs.
  • Background in fintech, marketplaces, or high-traffic consumer platforms.

Extra Perks at Boom

  • Crescending Salary (First 90 Days): you prove impact, we ramp your pay up, faster than most companies promote.
  • Stock Options (Post 90 Days): real ownership. Not play money, but a meaningful equity stake in Boom’s future.
  • Missionary Bonus: milestone-based cash or digital asset rewards for those who go above-and-beyond expectations in the first year.
  • Founder Access: direct collaboration with founders/leadership, not layers of management.
  • Rapid Growth Path: prove yourself in 90 days and you won’t just work on tickets, you’ll lead initiatives.
  • Onsite Culture: daily face-to-face collaboration in London.
  • Wellbeing Support: private healthcare & wellness allowance (because missionaries need fuel, too).
  • Time for Mastery: dedicated “Build Fridays” to experiment, refactor, or research new tech (mobile + blockchain).
  • Immersive Offsites: team offsites (local & abroad) to reset, align, and celebrate wins together.

Compensation & Rewards

  • Base Salary (London, senior-level):
  • First 90 days: £5,500 → £7,500 → £9,500/month crescending structure.
  • Post-90 days: £95,000 – £130,000+ full base salary depending on performance and seniority.
  • Equity / Stock Options: meaningful ownership in Boom.
  • Missionary Bonus: milestone-based cash or digital asset rewards.
  • Healthcare & Wellness: private cover + allowance.
  • Experience
    Required
  • Employment
    Full-time
  • Salary
    £90,000 – £130,000 yearly
  • Starting time
    Immediate start!

pin icon14 Hanover Square, W1S 1HN, London

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EngineerLondon

Technology Company • 11-50 Employees

Hiring on JOB TODAY since October, 2025

Elaine H. avatar icon
Elaine H.Active 9 hours ago
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