How we built a real-time multiplayer coding platform that stays perfectly in sync under load.
Applied R&D
Internal Engineering Benchmark
Most 'real-time' features feel laggy or fall out of sync the moment load picks up. We needed to prove a deeply integrated, genuinely low-latency approach.
A high-performance learning platform built to prove that real-time, multiplayer coding can stay perfectly in sync, even under heavy concurrent load.
We were tired of real-time features that lag and desync the moment more than a few people use them. We built EduScale to show that sub-200ms state synchronization is possible across many concurrent users in a complex, stateful app.
Beyond just a dashboard, EduScale is a testament to our philosophy: performance is a fundamental user experience, not an afterthought.
From generic problems to architectural solutions.
Users expect immediate feedback, but keeping many users in sync in real time often introduces lag and data conflicts that kill engagement.
Managing real-time coding battles and progress tracking across multiple users without data conflicts is notoriously difficult.
Providing a secure, sandboxed environment for live code execution while maintaining near-native speed.
Built to scale. Engineered for performance.
We built dynamic, node-based paths that adapt to the learner's journey.
Removes the 'where do I start?' anxiety for new engineers.
A high-frequency web-socket arena for real-time competitive coding.
Bootstraped engagement by turning solitary study into a social, competitive sport.
An integrated, sandboxed 'Code Runner' that works instantly in the browser.
Allows students to move from theory to practice in seconds, not hours.
Using Redis and PostgreSQL to aggregate behavior data in real-time.
Gives instructors the 'x-ray vision' they need to see where students are actually struggling.
A unified dashboard that doesn't just show 'done'—it shows velocity, engagement trends, and predicted roadblocks.
Founders and instructors get a real-time pulse on their community's health.
Optimized with PostgreSQL materialized views and Redis caching to keep complex queries under 50ms.
Visual, node-based graphs that track progress and unlock new challenges based on performance.
Provides a clear, gamified sense of progression.
Uses recursive CTEs in Postgres to manage complex, branching dependency trees efficiently.
Face off in 1v1 and group coding challenges with instant leaderboard updates.
Turns practice into a game, significantly boosting daily active users.
Powered by a custom Socket.io implementation designed for high-frequency state synchronization.
Write and run code in multiple languages with immediate feedback, entirely in-browser.
Removes the 'it works on my machine' barrier for beginners.
Utilizes isolated Docker containers and gRPC for secure, high-speed code evaluation.
Next.js 14 utilizing Server Components to minimize bundle size, paired with Framer Motion for high-end UI transitions.
A modular Node.js layer using Prisma for type-safe data access and a custom event bus for cross-service communication.
PostgreSQL for persistent data integrity, and Redis for high-speed state, caching, and the Socket.io adapter that keeps battles in sync across server instances.
Optimized WebSocket architecture capable of handling high-frequency state updates with minimal overhead.
Every production system hides engineering decisions that don't show up in the UI. Here's what was actually difficult.
We implemented a deterministic delta-update system that only broadcasts state changes, reducing bandwidth usage by 80%.
“In real-time systems, what you *don't* send is as important as what you do.”
We moved all scoring server-side and guarded battle start and scoring with Redlock distributed locks, so two events can't double-count and a late submission can't steal a win.
“In competitive real-time systems, the server has to be the single source of truth. Never trust the client's timing.”
We developed a warm-pool of isolated containers, allowing us to spin up a secure execution environment in under 500ms.
“Infrastructure optimization is just as important as code optimization for specialized features like this.”
We bring the same level of engineering rigor and design excellence to every project.