Principal Engineer

Job Title: Principal Engineer- CDN transition
Job location: London
Duration: 6 months

Description:

• The Contract Principal Engineer - CDN Migration is the lead technical authority for the CDN workstream within an active programme to migrate from an existing CDN platform to a target CDN.
• The role is responsible for technical leadership, decision-making, and hands-on delivery throughout the migration, including validating and refining the target solution, managing technical risk, and guiding the transition to full production traffic.
• This includes ensuring that traffic quality, bot management, and abuse controls are maintained or improved during the migration, particularly for media-style workloads with high visibility and sensitivity to false positives.
• Working closely with permanent engineers and programme stakeholders, the role ensures the migration is delivered safely, meets performance and reliability expectations, and leaves the organisation well-positioned to operate and evolve the new CDN platform.

Required experience & skills
Core experience

• Deep, hands-on experience operating CDN platforms in production at scale
• Proven experience transitioning or stabilising live traffic between CDN platforms
• Strong understanding of HTTP caching, TLS, edge routing, and failure modes
• Experience working in environments with demanding uptime and performance requirements
• Collaboration & delivery
• Comfortable taking ownership of an existing platform and improving it pragmatically
• Strong collaborator who works effectively alongside permanent teams
• Calm, methodical approach to risk in high-change, high-traffic environments
• Strong communication skills with technical and non-technical stakeholders

Guidant, Carbon60, Lorien & SRG - The Impellam Group Portfolio are acting as an Employment Business in relation to this vacancy.