Building digital products that are fast, scalable, and engineered to last.
I’m Affan, a Full-Stack Developer focused on building modern web applications, scalable backend systems, and polished digital experiences.
- ROLE
- Full-Stack Engineer
- FOCUS
- Distributed Systems • Next.js
- LOCATION
- India (UTC+5:30)
- COORDINATES
- 28.6139° N, 77.2090° E
- AVAILABILITY
- Open to Opportunities
Engineering reliable digital products — from first architectural blueprint to sub-second production deployment.
Bridging ambitious technical requirements with maintainable codebases, distributed resilience, and precision user interactions.
Product-Driven Thinking
Code is a means to deliver business value. I design and architect every feature with user experience, conversion, and product longevity in mind.
Scalable Backend Architecture
Engineered for high concurrent throughput with efficient database indexing, connection pooling, caching strategies, and resilient API contracts.
Security-Conscious Development
Proactive security at every layer: strict JWT validation, HTTP-only secure cookies, rate limiting against brute force, input sanitization, and CORS isolation.
Performance & Maintainability
Writing clean, modular TypeScript with strict type boundaries, low latency response times, minimal bundle footprint, and clear documentation.
Engineered Systems & Work
Index of production-grade distributed architectures, real-time engines, and precision full-stack applications.
Real-Time Chat & Collaboration Engine
Low-latency bidirectional messaging platform with distributed room state and security controls.
The Architectural Challenge
Traditional polling causes heavy server overhead. Real-time messaging requires reliable bidirectional socket synchronization, state recovery across disconnects, and flood protection.
Engineered Solution
Engineered an event-driven WebSocket/Socket.io backend with Express, MongoDB persistence, Redis presence caching, and optimistic client-side UI updates.
Architected socket event protocols, backend APIs, rate-limiting middleware, MongoDB schemas, and responsive optimistic UI.
Engineered Capabilities
- Sub-50ms message propagation with WebSockets
- Live typing indicators & Redis presence tracking
- JWT authentication with secure HTTP-only cookies
- Sliding-window rate limiting against spam attacks
Technology Stack
- ↳Sub-50ms message dispatch latency
- ↳Zero message drops during socket reconnection
AI Fitness Assistant
Voice-enabled fitness companion generating personalized workout regimens and custom nutrition plans via Gemini AI.
The Architectural Challenge
Static workout routines fail to adapt to individual injuries, dietary constraints, and fitness goals without expensive personal trainers.
Engineered Solution
Built a Next.js platform utilizing Vapi for interactive voice intake, Google Gemini for dynamic workout/diet program generation, and Convex for reactive real-time data sync.
Engineered full-stack app: Vapi voice agent flows, Gemini prompt pipelines, Convex real-time schema, Clerk auth, and Shadcn UI.
Engineered Capabilities
- Conversational Voice AI assistant (Vapi) for fitness intake
- Custom workout routines & meal plans generated by Gemini AI
- Reactive real-time database & program management with Convex
- Multi-provider authentication & route security via Clerk
Technology Stack
- ↳Real-time voice-driven fitness consultation
- ↳Automated personalized workout & diet generation
Tiny Vector Search Engine
Modular, in-memory vector similarity engine built from scratch in pure Python with exact Cosine math and REST API.
The Architectural Challenge
Commercial vector databases hide dense vector arithmetic behind complex C++ wrappers, making it difficult to understand embedding spaces, geometric similarity, time complexity trade-offs, and metadata filtering.
Engineered Solution
Engineered a zero-dependency vector engine in Python implementing pure cosine similarity math, O(N log K) min-heap nearest-neighbor retrieval, metadata pre-filtering, and atomic JSON disk persistence backed by FastAPI.
Architected the decoupled multi-layer system: vector math kernel, in-memory dimension-enforced storage, heap-based search index, metadata pre-filter, atomic disk persistence, and 48 automated tests.
Engineered Capabilities
- Pure Python vector arithmetic (Cosine similarity, L2 norm, zero-vector safe)
- O(N log K) bounded Top-K candidate selection via min-heap priority queues
- Metadata pre-filtering and candidate ID set reduction before vector scoring
- Production-ready FastAPI REST API with Swagger documentation & Pydantic schemas
Technology Stack
- ↳Zero external vector DB dependencies
- ↳48/48 unit & integration tests passing
- ↳O(N log K) heap-bounded search latency
Technical Stack & Tooling
A production-proven technology stack honed through distributed architecture, open-source development, and client deliverables.
Frontend Engineering
Crafting performant, accessible, and responsive user interfaces with modern component architectures.
Hooks, Context, State Design
App Router, SSR, Server Actions
Strict Type Safety & Generics
Async/Await, DOM APIs
Design Systems & Custom Configs
Semantic Structure & Modern CSS
Backend & Systems
Architecting reliable server environments, high-throughput APIs, and real-time streaming services.
Event Loop, Streams, Performance
Middleware, Routing, Error Boundaries
Resource Modeling, Versioning, Auth
Socket.io, Bidirectional Channels
JWT, Session Cookies, OAuth
Databases & Caching
Designing structured relational and document databases with optimized indexing and in-memory caches.
Document Modeling, Mongoose, Aggregations
Relational Schemas, Constraints, SQL
In-Memory Caching, Pub/Sub, Key Eviction
DevOps & Infrastructure
Building reproducible containerized environments, version control practices, and deployment pipelines.
Multi-stage Builds, Containerization
Git Flow, Code Review, Branching
GitHub Actions, Automated Testing
Vercel, Render, AWS/Cloud VPS
Core Foundations & AI
Deep foundational understanding of computer science principles and modern AI tool integrations.
Optimized Problem Solving
TCP/IP, HTTP/1.1-2-3, WebSockets
Processes, Concurrency, Memory
Prompt Engineering, API Integrations
Open Source Impact & Evidence
Demonstrated technical excellence in distributed systems, asynchronous PR review cycles, and large-scale codebase contributions.
GirlScript Summer of Code
Contributed high-impact pull requests across open-source web and backend repositories, collaborating with maintainers on production bug fixes and UI performance.
Social Summer of Code
Delivered modular frontend enhancements, component refactoring, and critical fixes across diverse open-source codebases.
UnvibeCode Open Source Challenge 2026
Earned Rank 64th globally in competitive open-source challenge by delivering high-velocity feature contributions and performance optimizations.
Distributed Collaboration & Strict Git Architecture
Experienced in asynchronous RFC discussions, semantic versioning, linear commit trees, and zero-downtime merge strategies.
Engineering Track Record
Real-world software engineering experience working within agile engineering teams on live production systems.
Full Stack Engineer
Engineered a production B2B maritime freight platform with live rate operations, dynamic pricing engines, currency normalization, and automated SEO pipelines.
Full Stack Developer
Developed component-based frontend architectures and integrated RESTful APIs with sub-second page performance.
Full-Stack Freelance Engineer
Successfully delivered 4 production-grade freelance projects with 100% on-time milestone delivery and client satisfaction.
Engineered Capabilities
Delivering high-performance, conversion-ready digital solutions engineered for speed, business longevity, and security.
SaaS & Web Applications
Turn your vision into a scalable, high-converting SaaS product. Built with clean architecture, robust user authentication, and high performance from day one.
Real-Time & Collaborative Systems
Live chat engines, real-time collaboration boards, instant notification systems, and presence trackers engineered with WebSockets and Redis pub/sub.
REST APIs & Backend Infrastructure
High-throughput API microservices with clean controller-service architecture, structured error handling, token security, and caching strategies.
High-Performance Frontend & UI
Transform Figma designs or functional requirements into pixel-perfect, accessible, and fast web experiences with perfect Lighthouse scores.
Auth & RBAC Systems
Implement impenetrable authentication and authorization systems with JWT, secure HTTP-only cookies, session refresh strategies, and role-based permissions.
AI-Powered Web Features
Integrate OpenAI, Claude, or open-source LLMs into your product workflows with streaming responses, prompt management, and automated text pipelines.
Why Work With Me
An engineer who treats your codebase, architecture, and business goals with the rigor and ownership of a technical co-founder.
Proven Track Record
Delivered 4 production freelance projects with 100% full success, strict milestone adherence, and high client satisfaction across full-stack deliverables.
Full-Stack Autonomy
I bridge the gap between polished UI engineering and scalable backend infrastructure, eliminating coordination friction and accelerating delivery.
Engineering Craftsmanship
I write clean, documented, strictly typed TypeScript that your team can comfortably maintain and extend for years to come.
Reliable & Direct Communication
Expect transparent updates, clear sprint milestones, proactive problem solving, and zero technical excuses.
Have a project or opportunity?
Let's build a fast, scalable, and engineered digital product. Whether you need a full-stack system from ground zero, distributed backend infrastructure, or real-time capabilities.
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