Sandra KayirangwaSoftware Engineer
Hi, I’m Sandra.
I build backends and APIs, mobile and web apps, data pipelines, machine learning models, IoT systems.
I turn raw signals into decisions people can act on.
Work
Main projects
- AfyraConnects smallholder farmers with feed manufacturers who need reliable quantities of crop residues.
- PAWSAn IoT and AI early-warning system for human-wildlife conflict around Maasai Mara water pans.
- Diabetic Retinopathy Severity ClassifierA medical imaging app that classifies retinal photographs across five severity levels.
More projects
- Supermarket POS APIA point-of-sale backend with automated tests.
- Care Reminder APIEmails caregivers when medication and appointment reminders are due.
- Privacy Guard APIMasks personal data before text reaches an LLM.
- AI Notion Research AgentA chat agent that researches topics and saves the findings to Notion.
The full history is in my CV.
About
I’m a software engineer working in backend and data, and exploring AI. I’m most interested in building things that keep working when conditions aren’t ideal.
So far, that has meant pipelines that check incoming data before anything relies on it, APIs that the rest of a product depends on, and models that explain their output instead of just giving a number.
I like finding the source of a problem and helping to fix it there. I also care about what technology makes possible for people, especially the people who need it most.
The question I keep coming back to is simple: does this make something easier for the person on the receiving end? If not, I keep looking.
Education
AkiraChix, CodeHive
Tech training program
Feb 2026 to Nov 2026
- Programming languages
- Python, SQL, JavaScript, Dart
- Backend and APIs
- FastAPI, REST API design, SQLAlchemy, JWT authentication, OAuth 2.0, Role-based access control, MQTT
- Databases
- PostgreSQL, Data modeling, Query optimization
- AI and machine learning
- PyTorch, Model training and evaluation, Transfer learning, Model deployment on constrained hardware
- Mobile and web development
- Flutter, Next.js, React
- Design
- Figma, UI design
- IoT and hardware
- ESP32, LoRa, Sensor integration
- QA and testing
- Cypress, API testing, End-to-end validation
- Developer tools
- Git and GitHub, Docker, Postman, Google Colab, Jupyter Notebook
Contact
I’m based in Kigali. Email me, or write your message here and send it from your email app.