Everything below runs in production today, serving 20–30k users. Each is presented the way it lives in the codebase — as a document type with fields, behavior, and consequences.
Fees & Finance Engine
PaymentsThe platform's entire revenue system — 40+ DocTypes on ERPNext, from payment plan to GL posting.
- engines
- payment plans · instalments · deferrals
- ledger
- discount stack posting GL entries
- entries
- multi-company split Payment Entries
- migration
- v2 re-architecture, zero downtime
An EMI lifecycle state machine with single-writer settlement eliminated double-booked payments; auto-posted settlement Journal Entries removed manual reconciliation.
LLM Review Pipeline
AI EngineeringAn automated code-review pipeline: every pull request is read by an LLM, grounded in the changed code's context, before a human ever sees it.
- pipeline
- diff + repo context → LLM → PR review
- grounding
- review prompts built from the changed code
- gates
- runs beside Semgrep + dependency audits
- adoption
- every PR, 10-person team, daily
Reviewers start from a machine-annotated diff instead of a cold one — cutting review turnaround and catching the boring bugs before humans spend attention on them.
Gateway Integration Layer
PaymentsSix payment gateways — including an education-loan EMI provider — behind one pluggable routing layer.
- security
- idempotent HMAC-verified webhooks
- recovery
- scheduled reconciliation sweeps
- banking
- 8 bank rails, ISO 20022 over SFTP
- dispatch
- dual-mode EMI / PG routing
Every callback verified with constant-time comparison, deduplicated, and recoverable — dropped callbacks are swept back in on a schedule.
Multi-Tenant ERP Core
System DesignOne shared core serving 4–5 institutions and 20–30k users — 25+ custom Frappe apps, 250+ DocTypes.
- tenancy
- institution as a first-class dimension
- security
- row-level permission_query_conditions
- overlay
- thin per-institution apps over hooks
- upgrades
- no forks, no monkey-patching
New institutions onboard without forking the platform; the core stays clean through Frappe version upgrades.
Cloud & GitOps Platform
InfrastructureProduction AWS EKS provisioned end-to-end with ~9k lines of Terraform, deployed by Helm and ArgoCD.
- compute
- EKS, spot + on-demand, autoscaler
- data
- Multi-AZ RDS MariaDB, Frappe-tuned
- secrets
- External Secrets Operator, zero plaintext
- delivery
- CodeBuild → ECR → ArgoCD Image Updater
A documented 43% infrastructure cost reduction while raising the security posture — with the runbook to prove it.
Realtime Bus Tracking
RealtimeLive GPS school-bus tracking for parents, built on Frappe's realtime stack.
- pipeline
- Redis pub/sub → Socket.IO rooms → React
- fallback
- graceful WebSocket → polling degradation
- geo
- proximity stop detection, deduped pushes
- framework
- patched a gap in the realtime layer
Parents watch the bus approach in real time; the system degrades gracefully instead of failing when networks do.
Portal & App Fleet
FrontendFour production React SPAs and a tri-lingual parent mobile app on top of the Frappe backend.
- portals
- admin · teacher · parent · curriculum
- desk
- React previews inside native desk forms
- exams
- offline-tolerant engine, IndexedDB
- jobs
- nightly RQ pipelines for PDFs at scale
An exam engine that survives network loss mid-exam, and portals that 20–30k users rely on daily.
Client and institution names are kept private. Numbers are real and happily discussed in an interview.