Backend Engineer - Phone Scam Disruption

Netcraft is a global leader in cybercrime detection and disruption.

We’re searching for a Backend Engineer to join our growing engineering team. Based in either London, Manchester, or Bath, you will report to one of our Engineering Managers and work primarily on the backend of our cybercrime detection and disruption services. The product you’ll spend most of your time on is our phone scam disruption service.

• Design and build new features and services as the product grows, while taking non‑functional requirements such as performance, reliability, and security into account.
• Maintain and modernise existing services, including legacy Perl systems, ensuring stability, maintainability, and operational reliability.
• Test and document work to a high standard with strong attention to detail.
• Respond to issues with urgency and ownership, identify root causes, and implement long‑term fixes.
• Identify scaling bottlenecks and resolve them, being conscious of running costs.
• Collaborate with other engineering teams to ensure services you own are well‑integrated with theirs.
• Work with cross‑functional stakeholders to propose, design and implement solutions that meet business needs.
• Work independently and proactively, identifying opportunities to improve systems and processes over time.

• Experience developing and maintaining production backend systems, ideally in Go or a similar backend language.
• Background relevant to phone scams such as telecoms, phone or messaging systems, or fraud and anti‑abuse.
• Ability to work independently and take ownership of services and systems.
• Strong attention to detail, especially when working with production systems.
• Proactive mindset when addressing operational issues or incidents.
• Experience with SQL databases (e.g. MySQL or MariaDB), including schema design and writing and optimising complex queries.
• Experience with version control (Git) and CI/CD pipelines.
• Good written and verbal communication skills, with the ability to convey technical concepts clearly and concisely.
• Open to using AI tooling in software development.

• Experience with Perl.
• Exposure to Docker, Kubernetes, or other containerisation technologies.
• Experience working on large or long‑lived production systems.
• Interest in cybercrime or cybersecurity.
• Experience with ML/LLM classification or automation.
• Familiarity with telecoms, VoIP, or messaging technologies (e.g. SIP, SMPP, number routing).
• Comfortable using configuration management tools (e.g. Puppet).
• Experience with Type Script.

• 33 days annual leave, including public holidays (which can be worked if preferred).
• Generous enhanced family leave and pay.
• Enhanced sick pay from day one, rising to 12 weeks full pay after six months.
• Salary sacrifice pension with matched employer contributions up to 5% + NI savings.
• Private health cover, including access to a private GP service.
• Life assurance at 4× salary.
• Equity tracking scheme (eligibility criteria apply).
• Hybrid and flexible working options.
• Meals, snacks, and drinks provided in the office.
• Comprehensive health, safety, and wellness service available 24/7.
• Two paid learning & development days per year plus access to Udemy, Coursera, and other resources.
• Two volunteering days per year.
• Employee referral bonus scheme.
• Spot reward bonus scheme.

This is deeply important to us. Through our ally network, we support under‑represented groups and maintain a working environment free from bias, harassment, or discrimination. We encourage candidates from all backgrounds to apply. We’re also happy to make adjustments to the hiring process to ensure every candidate can participate fully.

Netcraft does not accept unsolicited approaches from external recruiters.