Dawid Szymaniak

Domain ownership & architectural migration

Leading the architectural transformation of the JSON Forms core domain, decoupling legacy monolithic Django templates into a modern FE/BE architecture — setting integration standards, establishing design patterns and mentoring engineers through code review.

Production observability & escalations

Escalation engineer for tier-1 enterprise accounts, using AWS Athena for ad-hoc SQL directly against live S3 data lakes to audit pipeline integrity and resolve high-severity incidents.

AI workflow optimisation

Built custom AI developer workflows (Claude Code skills) tuned for complex JSON schema migrations, measurably raising engineering velocity across the team.

High-throughput ETL pipelines

Engineered and maintained fault-tolerant ETL workflows processing terabytes a day across a long tail of third-party REST integrations.

Asynchronous orchestration

Designed distributed task flows with Celery chains and chords, with custom retry strategies, backoff and rate limiting to keep the system honest under load.

Monitoring & cloud operations

Watched production health through Sentry and application telemetry, operating in AWS to troubleshoot and hotfix live issues.

Real-time medical engine

Built a fullstack medical application on Django, vanilla JavaScript and WebSockets (Django Channels) for instant sharing of results.

Data extraction & security

Integrated OpenAI's API to parse unstructured medical results, with sensitive data protected using AWS KMS.

E-commerce & payments

Integrated Stripe for checkout and subscription management.