Endava — Enterprise Clients
Full-stack JavaScript delivery across Deutsche Telekom, NETS Scandinavia, and eLife Sciences.
The context
Endava is a global technology consultancy that places engineers with major enterprise clients. During my dated Endava tenure, I rotated across projects for Deutsche Telekom, NETS (Scandinavian payments infrastructure), and eLife Sciences (UK academic publishing) — all full-stack JavaScript.
This period built my delivery baseline. Working across telecoms, payments, and academic publishing forced me to adapt quickly, understand unfamiliar domains, and contribute without needing a long ramp-up.
What I built
Scientific paper processing
Built a document-conversion system with Node.js, AWS S3, and Lambda that processed 2,000+ scientific papers daily. The React frontend handled submission, tracking, and collaborative workflows — optimized to render large document collections without choking the browser.
E-commerce checkout system
Created a checkout with React and TypeScript supporting multiple payment methods including Klarna and cards. In payments, reliability is the requirement — every edge case affects money, reconciliation, or trust. This is where my attention to payment-critical code started.
Impact across clients
- 2,000+
- Papers processed daily
- 3
- Domains — telecom, payments, academic
- 2
- Junior devs mentored
What I took away
Agency work forces you to get productive in unfamiliar codebases and domains. After rotating through telecoms, payments, and academic publishing, I learned to start with the domain constraints, then narrow the technical work to what the client actually needed shipped.
This is also where I started mentoring — guiding two junior developers through React best practices and Node.js architecture. Explaining things showed me the gaps in what I actually understood.