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Testimony Gbajobi

@testimonygbajobi

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I build reliable patient-facing APIs, booking systems, and secure cloud services.

Bulgaria

Message

What I'm looking for

I'm interested in applying my experience building reliable, secure patient-facing booking and clinical services to health systems that value pragmatic architecture, data protection, and close collaboration with clinicians and operations teams.

At State Street, I own patient-facing appointment APIs for mobile and web booking, turning monolithic endpoints into Python and Flask REST services. I built OAuth2 and RBAC controls that reduced booking permission incidents by 70%.

I also delivered AWS Lambda and SNS reminder workflows that cut no-shows by 18%, migrated legacy EHR data into PostgreSQL, and improved booking-to-invoice latency from five seconds to 500ms. I run containerized services on EKS, automate releases with GitHub Actions, and support patient services through on-call incident response.

Previously at EPAM Systems, I built Node.js and TypeScript microservices for payments and scheduling, improved booking throughput threefold with Redis, and reduced appointment-query latency from 340ms to 85ms. I integrated calendar and insurance providers through OAuth2 and webhooks while building CI/CD pipelines and compliance-focused audit logging.

My earlier work at Luxoft and Capgemini covered React and Django portals, Java and C# backend services, secure REST APIs, data migrations, Docker deployments, and automated testing. I enjoy pragmatic architecture, reliable delivery, and working with clinicians, operations, product, and UX teams on patient-facing health systems.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

State Street

Feb 2024 - Present (2 years 7 months)

Owned the patient-facing appointment API, refactoring monolithic endpoints into RESTful services and architecting OAuth2 authentication and RBAC. Built notification pipelines and containerized deployments, reducing no-shows and improving incident response.

Python Flask PostgreSQL Redis AWS AWS Lambda Docker GitHub Actions Prometheus Grafana RBAC Kubernetes CI CD

Senior Software Engineer

EPAM Systems

May 2019 - Jan 2024 (4 years 8 months)

Designed and implemented microservices in Node.js and TypeScript for a payments and scheduling platform, migrating cache layers to Redis and building CI/CD pipelines. Integrated third-party APIs and led performance profiling to reduce query latency.

Node TypeScript PostgreSQL Redis Docker AWS ECS CloudFormation Jenkins GraphQL Webhooks CI CD

Full Stack Engineer

Luxoft

Feb 2017 - Apr 2019 (2 years 2 months)

Built full stack features for client portals using React.js and Django, designed REST APIs, and implemented Redis caching. Deployed services to GCP and integrated SMS and email workflows to increase appointment confirmations.

React React Native Django MySQL Redis GCP Docker Stackdriver SMTP BDD

Software Engineer

Capgemini

Aug 2014 - Jan 2017 (2 years 5 months)

Developed backend services in Java and C# for enterprise projects, implemented RESTful APIs with Oracle and PostgreSQL, and led migration of a legacy monolith to modular services. Improved security posture and reduced deployment failures.