IntermediateTECHNICAL
Think of a project where system integration (APIs, data flows between applications, etc.) played a key role. What was your concrete involvement as a BA in defining interfaces, data mappings, or integration requirements?
Business Analyst
General

Sample Answer

In my last role, I worked on integrating our in‑house order management system with a third‑party logistics provider to support same‑day delivery across 5 countries. We were moving about 30k orders per day, so data integrity and latency really mattered. I started by mapping the end‑to‑end process on a whiteboard with ops and engineering, then translated that into sequence diagrams and interface contracts. I owned the API requirement specs: request/response payloads, error codes, SLAs, and retry behavior. For data mapping, I created a detailed spreadsheet that mapped 120+ fields between our system and the 3PL API, including transformations, validation rules, and ownership of the source of truth. I also defined edge‑case scenarios (cancellations, split shipments, failed labels) as concrete examples in the specs. After go‑live, failed order transmissions dropped from ~4% in the pilot to under 0.3%, and we cut manual exception handling time in the warehouse by about 60%.

Keywords

Owned API interface specs, payload definitions, and error handling rulesCreated detailed field‑level data mapping across systems with transformationsCollaborated closely with ops and engineering to capture edge cases and SLAsMeasured impact via reduced failures and manual exception handling
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