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Caleb Grimah

@calebgrimah

Senior Software Engineer at Endeavor Streaming who built cross-platform playback experiences for web, mobile, and connected TVs.

Nigeria

Message

At Endeavor Streaming, I built and maintained production streaming apps in React, React Native, and TypeScript for web, mobile, and connected-TV platforms. I worked on live and on-demand playback, including playback-state synchronization and interruption recovery.

At eHealth Africa, I built healthcare products across web, mobile, and backend, including EHACare, Health-Mate, and GetCare. I developed APIs and offline-first workflows for clinical and field operations.

At Teal Technology Service (IBM OCP JV), I developed Udongo, an offline-first Android app for agricultural extension workers. I implemented local persistence, queued submissions, automatic retries, and REST API integration.

I also designed and built Astera end to end, from its Kotlin and Spring Boot backend to its creator mobile app and brand portal. With Arcade Reality, I built a creator–brand collaboration platform spanning frontend, backend, APIs, and deployment.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Endeavor Streaming

Oct 2024 - Jul 2026 (1 year 9 months)

Built and maintained production streaming apps in React, React Native, and TypeScript, delivering high-performance video experiences across web, Android, iOS, smart TVs, and connected-TV platforms. Implemented live and on-demand playback, real-time UI, and reusable components.

React React Native TypeScript REST APIs Playback Smart TV Debugging Mentorship

Software Engineer

eHealth Africa

Nov 2019 - May 2024 (4 years 6 months)

Built healthcare products covering electronic medical records, appointments, telehealth, pharmacy, laboratory services, memberships, and payments across web, mobile, and backend. Developed REST APIs, cross-platform apps, and offline-first workflows.

NodeJS Express Spring Boot React React Native Flutter Kotlin Java Redis RabbitMQ Google Cloud Platform REST APIs Offline First Testing Mentorship

Android Developer

Teal Technology Service (IBM OCP JV)

Apr 2019 - Apr 2020 (1 year)

Developed Udongo, an offline-first Android app in Kotlin and Java for agricultural extension workers collecting field data in areas with unreliable connectivity. Implemented local persistence, field-form validation, queued submissions, and REST API integration.

Kotlin Java Android SDK Offline First REST APIs Synchronization Debugging

Software Engineer

Biosec Solutions

Apr 2018 - May 2019 (1 year 1 month)

Developed BioConnect and BioSuite, building biometric enrollment, fingerprint verification, identity management, access control, and device administration features. Built Java and Spring Boot services and REST APIs with RBAC and third-party integrations.

Java Spring Boot REST APIs RBAC Neurotechnology SDK Android Web Development

Founder

Astera

Designed and built the platform end to end: Kotlin/Spring Boot backend, REST APIs, PostgreSQL data models, brand web portal, creator mobile app (React Native), and operations console. Implemented campaign management, creator submissions, reviews, and financial workflows.

Kotlin Spring Boot REST APIs PostgreSQL React Native Role Based Access Control Workflow Management

Founder

Arcade Reality

Built the complete product (Next.js, React, TypeScript, Node.js, PostgreSQL, Redis) across frontend, backend, APIs, database, authentication, and deployment. Included creator discovery, project applications, shared workspaces, milestones, and role-based team administration.

Next.js React TypeScript NodeJS PostgreSQL Redis Authentication Deployment

Education

Degrees, certifications, and relevant coursework

Madonna University

Bachelor of Science, Computer Science

2013 - 2017

Activities and societies: Founded student groups for sharing technical knowledge and solving programming challenges together. Mentored junior students in programming fundamentals, debugging, and project development.

Bachelor of Science in Computer Science. Founded student groups for sharing technical knowledge and solving programming challenges together, and mentored junior students in programming fundamentals, debugging, and project development.