c
csarsebas

Sebastian Cesar

@csarsebas

Senior Full Stack Engineer

Argentina
Spanish, English
About me
I am a full-stack engineer with 15+ years of experience building production systems in healthcare, regulated government data environments, and mission-critical fintech. I have strong expertise in Python, NodeJs, Typescript, and AWS, with hands-on experience designing real-time event flows and secure multi-tenant architectures. I am comfortable owning features end-to-end and collaborating with US-based teams.... Read more

Skills

c
csarsebas
Sebastian Cesar
Offline • 
Average response time: 2 hours

See my services

Blockchain Security & Audits
I will build audited smart contracts on base and ethereum l2 with usdc integration
From$70 / projectMore details
AI Integrations
I will build a conversational whatsapp ai agent for appointments and lead intake
From$90 / projectMore details

Portfolio

Work experience

Self_Employed

Senior Full Stack

Self Employed • Full-time

Aug 2023 - Present • 2 yrs 11 mos

End-to-end technical ownership over the design, implementation, and operation of the entire platform, shared with a small high-autonomy team. • Designed and deployed mission-critical response systems prioritizing latency and availability, with end- to-end monitoring via Datadog. • Built distributed workflows with Temporal and Trigger.dev with coherent retry policies and automatic failure recovery, eliminating data loss in critical invoicing processes. • Developed parallel processing pipelines on databases of 50+ GB, maximizing compute capacity and significantly reducing cloud infrastructure costs. • Implemented advanced web scraping with Browserless for integrations with external systems. • Integrated real-time features with Pusher and Supabase; multi-environment secret management with Doppler. • Hybrid AWS + Google Cloud architecture deployed via Serverless Framework and Qovery.