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I am a senior full-stack engineer with 10+ years delivering production systems across healthcare and fintech-adjacent platforms. I specialize in end-to-end architecture, API design, and cloud-native delivery, driving measurable reliability and performance gains. I enjoy collaborating with stakeholders to translate complex requirements into maintainable services and user-facing experiences, owning delivery from design through rollout, monitoring, and iterative improvement. I value clear communication, automated testing, and security hardening to ensure resilient systems.…I am a senior full-stack engineer with 10+ years delivering production systems across healthcare and fintech-adjacent platforms. I specialize in end-to-end architecture, API design, and cloud-native delivery, driving measurable reliability and performance gains. I enjoy collaborating with stakeholders to translate complex requirements into maintainable services and user-facing experiences, owning delivery from design through rollout, monitoring, and iterative improvement. I value clear communication, automated testing, and security hardening to ensure resilient systems.

Ricardo Antonio Sapien

Full Stack Developer, Back-End Developer, Front-End Developer, +3

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I am a senior full-stack engineer with 10+ years delivering production systems across healthcare and fintech-adjacent platforms. I specialize in end-to-end architecture, API design, and cloud-native delivery, driving measurable reliability and performance gains. I enjoy collaborating with stakeholders to translate complex requirements into maintainable services and user-facing experiences, owning delivery from design through rollout, monitoring, and iterative improvement. I value clear communication, automated testing, and security hardening to ensure resilient systems.…I am a senior full-stack engineer with 10+ years delivering production systems across healthcare and fintech-adjacent platforms. I specialize in end-to-end architecture, API design, and cloud-native delivery, driving measurable reliability and performance gains. I enjoy collaborating with stakeholders to translate complex requirements into maintainable services and user-facing experiences, owning delivery from design through rollout, monitoring, and iterative improvement. I value clear communication, automated testing, and security hardening to ensure resilient systems.

Available to hire

I am a senior full-stack engineer with 10+ years delivering production systems across healthcare and fintech-adjacent platforms. I specialize in end-to-end architecture, API design, and cloud-native delivery, driving measurable reliability and performance gains.

I enjoy collaborating with stakeholders to translate complex requirements into maintainable services and user-facing experiences, owning delivery from design through rollout, monitoring, and iterative improvement. I value clear communication, automated testing, and security hardening to ensure resilient systems.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Senior Software Engineer at FelixHealthcare.AI

December 1, 2024 - Present

Designed and implemented an AI-assisted clinical workflow service that integrates model inference with provider-facing APIs, improving task throughput by 28% while keeping response times under 800ms via Cloud Run autoscaling and caching. Built secure patient data access patterns using OAuth 2.0 and JWT-based authorization, adding audit-friendly request tracing and reducing authorization-related incidents by 35% through consistent middleware and idempotent write flows. Developed a full-stack dashboard experience in React and TypeScript that visualizes care-plan status and operational metrics, cutting manual follow-ups by 22% through faster triage and clearer exception handling. Created event-driven integrations with Pub/Sub to decouple ingestion from downstream processing, improving pipeline reliability and reducing processing failures by 40% using retries, dead-letter handling, and distributed tracing.

Senior Software Engineer at Google

September 1, 2022 - December 1, 2024

Architected and shipped a cloud-native service for high-scale user interactions using Node.js and REST APIs on Google Cloud Platform, improving p95 latency by 18% through query optimization and caching strategies. Implemented a robust data pipeline with BigQuery for analytics and experimentation, enabling near-real-time insights and reducing reporting cycle time by 30% with partitioned tables and automated backfills. Partnered with product and client stakeholders to translate requirements into system design docs and incremental delivery plans, improving cross-team delivery predictability and reducing rework by 20%. Hardened reliability by adding observability with distributed tracing and SLO-based alerting, decreasing production regressions by 25% through targeted rollouts and automated testing gates.

Senior Software Engineer at Frost Bank

February 1, 2018 - August 1, 2022

Delivered customer-facing banking features by building maintainable backend services and web interfaces, improving onboarding completion rates by 15% through streamlined flows and validation. Designed secure integration layers for account and transaction data, applying least-privilege access controls and consistent API contracts to reduce data mismatch defects by 18%. Modernized legacy components into modular services, improving deployment frequency and reducing change failure rate by 22% through CI/CD standardization and automated regression coverage.

Software Engineer at Oceans Healthcare

June 1, 2015 - February 1, 2018

Built healthcare application features end-to-end, connecting user workflows to backend services and improving operational visibility for care teams. Implemented data validation and error-handling patterns across APIs, reducing support tickets by 12% through clearer failure modes and consistent responses.