What does a Forward Deployed Engineer do? How is it different from a regular software engineer?
Think first
Think about: customer proximity, discovery, prototyping, productionisation, ambiguity.
Strong answer
A Forward Deployed Engineer (FDE) works at the intersection of customer, product, engineering and AI. Unlike a regular SWE who builds product features from a spec, an FDE: (1) Runs discovery — interviews customers to understand their actual workflow and constraints. (2) Designs solution architecture under real constraints (compliance, RBAC, latency, cost). (3) Prototypes rapidly — builds POCs that prove value to the customer. (4) Productionises — takes the POC to production with auth, observability, eval, security review. (5) Integrates — connects to the customer's enterprise systems (SSO, data sources, APIs). (6) Communicates — presents technical solutions to non-technical stakeholders. The key difference: an FDE operates with high ambiguity and customer proximity. A regular SWE gets a spec; an FDE writes the spec by understanding the customer. FDEs need full-stack skills, AI engineering, system design, and strong communication — plus the 'high agency' to ship end-to-end.
Weak-answer indicators
- Says 'FDE is just a sales engineer'
- Doesn't mention discovery or architecture
- Skips the customer proximity aspect
- Ignores the productionisation step
Likely follow-up questions
- How do you run an effective discovery session?
- What's the hardest part of productionising a POC?
- How do you handle conflicting customer requirements?