Available for freelance & consulting
Crafting healthtech
products for impact
I'm Comfort — an Android engineer specializing in mHealth, building production-grade apps in Kotlin and FHIR for healthcare workers worldwide. My work ships to 500+ users annually across multiple countries.
- 7+
- Years experience
- 10+
- Products shipped
- 2
- Certifications
Android · Kotlin · FHIR
Capabilities
Skills & toolkit
Deep expertise across the Android stack and backend — pick a domain to explore.
95%
Proficiency
Android Development
Native Android apps with focus on healthcare solutions
Selected work
Projects that ship care
Healthcare, Android, and web products — from open-source frameworks to client platforms.
HYMN BOOK
Digital hymn book providing easy access to religious songs and worship materials for mobile users.
FHIRCORE
Software Engineer · 2022–2024Open-source Android framework for building FHIR-based healthcare applications. Collaborated with ONA team from Kenya to create scalable digital health solutions used across multiple countries.
Wastical
Android Developer · 2024–2026Waste management platform for service providers and clients — track records, manage payment proofs, verify documents, and send automated payment reminders with secure phone OTP login.
SilverCircle
Full-Stack Developer · 2025–2026Official Android release portal for a secure social and discovery app — verified APK downloads and release notes.
Sama Tanjong
Web Developer · 2025–2026Professional portfolio showcasing career statistics, highlights, news, trophies, and press materials for a sports figure.
Arch Holdings
Web Developer · 2025–2026Corporate website for an investment group covering Agriculture, ICT, Construction, Food Processing, and Energy.
Georgia TB Reference Guide
Android Developer · 2020–2022Healthcare reference app for tuberculosis treatment guidelines, supporting healthcare workers in Georgia.
TypeU
Android Developer · 2020–2022Educational mobile app focused on diabetes management and patient education for Emory University.
OpenAMR
Software Engineer · 2020–2022Open-source antimicrobial resistance surveillance system for tracking drug-resistant infections.
MAMALOVE
Full-Stack Developer · 2020–2022Maternal health platform providing resources and support for expecting mothers and healthcare providers.
Career
Where I've built
Seven years shipping healthtech and software across Africa — from university to international NGOs to independent client work.
Experience
Software Engineer
D-Tree International
Built mHealth Android applications with Kotlin and FHIR standards for maternal/child health and disease prevention, deployed for healthcare workers across Malawi and the USA in collaboration with the ONA team from Kenya.
Highlights
- Built scalable mobile features integrating REST APIs with secure health-data transmission
- Reduced critical production issues by 40% through rigorous bug tracking and fixes
- Shipped via CI/CD pipelines using Docker and Git for reliable, efficient releases
- Collaborated cross-functionally with product managers, designers, and healthcare domain experts
Let's build something meaningful
Open to freelance, consulting, and full-time roles in digital health. Based in Lilongwe, Malawi — working globally.
calmwalija@gmail.com
Phone
+265 993 563 408
GitHub
github.com/calmwalija
linkedin.com/in/calmwalija
Location
Lilongwe, Area 18, Malawi
Beyond code