Open to opportunities

David Schejtman

@davidschejtman1

Message

I’m a senior full-stack engineer architecting Python/React fintech platforms on AWS.

United States

Message

What I'm looking for

I’m looking to keep owning end-to-end Python/React product delivery on AWS—architecting high-scale fintech systems, partnering with strong teams, and mentoring engineers while staying hands-on (~50% coding) with performance, reliability, and compliance in mind.

I’m a senior full-stack engineer with 10+ years architecting Python backend services, PostgreSQL data layers, and React/Redux front-ends on AWS for fintech and B2B SaaS platforms. I currently lead a 14-engineer org on a real-time financial product processing ~$500M/month, with end-to-end ownership of Python REST APIs, payments workflows, and customer-facing UI.

Hands-on across Python web frameworks, Django REST patterns, PostgreSQL, Terraform IaC, Docker, GitHub Actions, and AWS. At OneSource, I cut p95 latency 40% and lifted throughput 30%, designed PostgreSQL schemas for high-volume financial data, and shipped 12 customer-facing features (~50%+ coding) while driving deploy success to 99.5%. I’ve also built and scaled microservices and partner integrations (99.95% SLA) and developed security tooling that blocked 200+ defects pre-release and reduced repeat-incident rate 50%.

Experience

Work history, roles, and key accomplishments

Current

Principal Architect & Tech Lead

Current

OneSource

Jan 2025 - Present (1 year 5 months)

Lead a 14-engineer org architecting a vertical SaaS fintech platform processing ~$500M/month on AWS, with end-to-end ownership of Python REST APIs, ledger schemas, and React/Redux dashboards. Improved p95 latency by 40% and increased throughput by 30% while shipping 12 customer-facing features end-to-end.

Python Django REST Framework PostgreSQL AWS RDS Terraform Docker React Redux

Current

Senior Architect

Current

Blockparty

Apr 2024 - Present (2 years 2 months)

Built Python and TypeScript backend services with PostgreSQL on AWS and React front-ends, shipping 14 full-stack microservices in 3 weeks vs an 8-week estimate. Integrated 12 B2B partner APIs with idempotency, retries, and audit logging, sustaining a 99.95% delivery SLA and reducing API-contract defects by 60%.

Python TypeScript React Redux PostgreSQL Microservices Contract Testing

Senior Solutions Engineer

Optibus

Jan 2022 - Jan 2024 (2 years)

Built Python backend services and React/Redux operator dashboards on PostgreSQL/Redis supporting 200M+ daily trips. Delivered REST and gRPC APIs, improved TDD coverage to 85%+, cut MTTD by 50%, and maintained 99%+ deploy success.

Python REST APIs gRPC React Redux PostgreSQL Redis Docker Test Driven Development

Security Engineer

Procter & Gamble

Dec 2016 - Jan 2022 (5 years 1 month)

Built Python and Java security tooling, REST APIs, and automated test suites across Linux fleets handling 5B+ consumer transactions. Blocked 200+ defects pre-release and reduced repeat-incident rate by 50% through CI/CD and TDD.