01
API SYSTEMS
Practice with typed endpoints, middleware boundaries, and product flows from project-based backend work.
route.map
Software Engineer
Waleed Ahmad
Backend / Full-stack
APIs / Databases / Product Systems
buildingsoftware,learningsystems.
Software Engineer focused on backend development, APIs, databases, and practical full-stack projects.
Backend Infrastructure ModuleStatic Preview
Data Container
API / DB / Replay Core
RequestsCaptured
FailuresReplayable
PaymentsAudited
Stylized server module for APIs, data layers, and system nodes.
System Identity
Learning backend systems through practical projects.
Modules that frame the portfolio around APIs, data, and project flows where software behavior needs to stay understandable.
02
DATA LAYERS
Experience working with relational models, Supabase/PostgreSQL patterns, and durable product state.
schema.lock
03
FAILURE VISIBILITY
Explored capture, replay, monitoring, and audit paths for understanding backend failure cases.
trace.on
Selected Systems
Projects with backend weight.
Two projects shaped around APIs, data state, trust flows, and the practical details behind product behavior.
Backend Devtool
FailTrace
status: tracetype: apimode: dark
A backend-focused project built to explore how failed API requests can be captured, stored, and replayed for debugging. The project helped me understand middleware, request lifecycle tracking, PostgreSQL storage, replay logic, and basic analytics.
Express
PostgreSQL
Supabase
Prisma
Docker
Analytics
Latency monitoring
Highlights
- Captures failed request context through Express middleware.
- Supports replay-oriented debugging for backend incidents.
- Tracks latency and failure patterns for system visibility.
CapturePersistAnalyzeReplay
Full-Stack Product System
FlyBuy
status: flowtype: p2pmode: logistics
My final year project, built as a full-stack product concept where buyers can request products from abroad and travelers can carry them. The project includes buyer/traveler workflows, escrow-style payment handling, milestone tracking, verification, fraud detection, and admin controls.
Supabase
PostgreSQL
Stripe
Face verification
Fraud detection
Admin workflows
Highlights
- Models buyer, traveler, milestone, and admin decision paths.
- Integrates payment release and refund handling around delivery state.
- Includes fraud detection and face verification as trust layers.
RequestMatchEscrowVerifyRelease
01 / Featured System
FailTrace
API Failure Replay System
A backend-focused project built to explore how failed API requests can be captured, stored, and replayed for debugging. The project helped me understand middleware, request lifecycle tracking, PostgreSQL storage, replay logic, and basic analytics.
Express
PostgreSQL
Supabase
Prisma
Docker
Analytics
Latency monitoring
Captures failed request context through Express middleware.
Supports replay-oriented debugging for backend incidents.
Tracks latency and failure patterns for system visibility.
Architecture Flow
01
API Request
02
Express Middleware
03
Failure Capture
04
PostgreSQL/Supabase
05
Replay Engine
06
Analytics
FailTrace ConsoleLive Capture
POST/api/orders500
GET/api/users/:id404
POST/api/replay200
Latency:342ms
Replay Status:Compared
Request Snapshot
Captured payload, headers, response state, and replay comparison metadata stay connected to the original API failure.
02 / Product System
FlyBuy
P2P Global Shopping Platform
My final year project, built as a full-stack product concept where buyers can request products from abroad and travelers can carry them. The project includes buyer/traveler workflows, escrow-style payment handling, milestone tracking, verification, fraud detection, and admin controls.
Supabase
PostgreSQL
Stripe
Face verification
Fraud detection
Admin workflows
Models buyer, traveler, milestone, and admin decision paths.
Integrates payment release and refund handling around delivery state.
Includes fraud detection and face verification as trust layers.
Buyer / Traveler / Admin FlowTrust Layer
01
Buyer Request
Buyer lane
02
Product Link Fetch
Buyer lane
03
Offer / Counter Offer
Buyer lane
04
Stripe Escrow
Traveler lane
05
Traveler Purchase
Traveler lane
06
Milestones
Traveler lane
07
Delivery Proof
Admin lane
08
Admin Release / Refund
Admin lane
ORDER CREATED
ESCROW HELD
TRAVELER MATCHED
FRAUD SCORE: LOW
PAYMENT RELEASED
Operational Model
Buyer, traveler, payment, verification, milestone, and admin states stay visible as the order moves from request to release.
Capabilities
learning systems through practical projects
Project-based practice across product interfaces, data, trust, failure paths, and model-backed features.
01
API Design
Comfortable building clear service boundaries, request contracts, middleware paths, and backend flows in projects.
RESTMiddlewareContracts
control.01armed
02
Database Design
Experience working with relational structure, access patterns, constraints, and practical query paths.
PostgreSQLSupabasePrisma
control.02armed
03
Reliability
Explored failures, retries, replay paths, latency visibility, and operational signals beyond the happy path.
ReplayMonitoringLatency
control.03armed
04
Security
Interested in authentication, verification, permissions, payment risk, and review loops at the product boundary.
AuthVerificationFraud
control.04armed
05
Product Engineering
Built project flows that connect backend decisions to user workflows, admin operations, payment states, and milestones.
WorkflowsPaymentsAdmin
control.05armed
06
AI Integration
Explored model-backed features for decisions, verification, automation, and review while keeping system behavior visible.
MLDecision SupportReview
control.06armed
Runtime Stack
STACK MANIFEST / 2026
$ cat waleed.stack.json --mode=backend-heavy --surface=product
skillGroups.backendSystems
Backend
API design
Express middleware
Service architecture
Request lifecycle design
Failure handling
skillGroups.dataInfrastructure
Database
PostgreSQL
Supabase
Prisma
Analytics pipelines
appRouter.uiLayer
Frontend
Next.js App Router
TypeScript
Tailwind CSS
Responsive UI
skillGroups.dataInfrastructure
DevOps
Docker
Latency monitoring
skillGroups.aiMlIntegration
AI/ML
AI-assisted product features
Face verification workflows
Model-backed decision support
Human review loops
skillGroups.productFlows
Payments & Integrations
Payments
Verification
Admin operations
Fraud detection
Buyer/traveler workflows
Timeline
Built toward backend product systems.
A compact path through software engineering, product systems, and backend-heavy project work.
2022 - 2026
01BSc Software Engineering
Built the academic foundation for software systems, product engineering, data structures, databases, and backend development.
2026
02FlyBuy Final Year Project
Designed a full-stack P2P global shopping platform with buyer, traveler, escrow, verification, and admin workflows.
2026
03FailTrace Backend DevTool Project
Built a backend-focused failure replay system around Express middleware, captured requests, replay flows, and analytics.
Now
04Backend-Focused Project Work
Continuing to build projects around backend systems, APIs, product flows, databases, and AI-integrated features.
$ contact --links=public
let's connect.
A public contact surface for professional connections and project context. LinkedIn is the primary contact path, and GitHub shows the work behind the portfolio.