The Challenge
EduFlow is a Learning Management System built for a national education technology initiative targeting university students and working professionals. The platform hosts structured courses with video lectures, interactive quizzes, assignment submission, peer review, and completion certificates. The mission requirement shaped every technical decision: the platform had to perform well on slow connections and work reliably on low-end Android devices.
Our Approach
We began with a structured discovery phase to map existing workflows, identify technical constraints, and define the highest-value features for the initial release. Rather than trying to build everything at once, we established a phased delivery plan with working software at each milestone.
What We Built
Video content is processed through Mux, which handles adaptive bitrate encoding and delivers video via its globally distributed CDN. Videos are encoded at five quality levels from 360p to 1080p, and the HLS adaptive streaming automatically selects the appropriate quality based on available bandwidth.
The quiz engine was built as a separate NestJS microservice with a flexible question schema that supports extensible question types without schema migrations. Code submission grading runs in isolated Docker containers on AWS ECS with configurable timeouts and memory limits. PDF certificates are generated with a cryptographic signature embedded in a QR code that links to a verification endpoint.
"EduFlow works in places where we did not expect software to work. Students in areas with 3G connections are completing courses at the same rate as students in major cities. That was the whole point."
The Results
EduFlow launched on schedule and exceeded every target metric in its first year. The 92% course completion rate is the platform's most significant achievement — it is more than seven times the global average for online learning platforms, and the client attributes it directly to the low-bandwidth video delivery and the structured cohort-based learning model.