Backend Software Engineer

Raghav
Kumar Singh

Ruby on Rails · EV Infrastructure · Payment Systems

Building mission-critical backend systems for India's EV charging ecosystem. Currently architecting OCPP-based charging platforms, dynamic payment pipelines, and real-time observability at TruePower by JioThings.

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0 Years Experience
0 Production Systems
0% Revenue Leakage
0 CGPA / 10
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About

Architecting the
backbone of EVs

I'm a backend engineer with 2+ years of production experience crafting the invisible infrastructure that makes things work — APIs that never sleep, payment pipelines that never leak, and charging sessions that just work.

At Enercent Technologies (TruePower by JioThings), I architect backend services that power India's leading EV charging platform — from the OCPP handshake when a charger boots up, to the UPI QR scan that settles a transaction, to the Elasticsearch dashboard showing real-time charger health.

I think in systems: how does data flow, where can it break, how do we reconcile when it does? My background spans IoT protocol implementation, microservices design, billing engine architecture, and webhook-based event systems.

OCPP 1.6J REST API Design Payment Reconciliation RFID Auth Smart Charging Microservices Webhook Systems EV Infrastructure Idempotency Background Jobs
raghav.rb
# Who is Raghav?   engineer = {   name: "Raghav Kumar Singh",   role: "Backend Software Engineer",   location: "Bengaluru, India 🇮🇳",   stack: ["Ruby on Rails", "PostgreSQL",              "Elasticsearch", "OCPP"],   domain: "EV Charging Infrastructure",   available: true }   # Currently shipping: focus = [   "Home Charging APIs",   "Billing Engine Optimisation",   "Fleet Management Backend" ]   > engineer[:available] => true
Expertise

What I build

Production systems that handle real money, real vehicles, and real users — at scale.

⚡

EV Charging Infrastructure

End-to-end OCPP 1.6J session lifecycle — from charger boot to transaction close. Smart charging, RFID auth, pre-booking APIs.

OCPP 1.6J WebSockets RFID CSMS Smart Charging
💳

Payment Systems

Razorpay Dynamic UPI QR, real-time webhook processing, idempotent reconciliation pipelines. Zero revenue leakage architecture.

Razorpay UPI QR Webhooks Reconciliation
🔌

API Architecture

RESTful API design, microservices, service decomposition. Versioned endpoints, rate limiting, API documentation.

REST API Microservices Postman OpenAPI
🔐

Access Control Systems

Whitelist management for CPOs and fleet operators. RFID/vehicle identifier-based access policies with self-service portals.

RBAC Fleet Auth CPO Systems Whitelist
📊

Observability & Analytics

Elasticsearch-based logging pipelines, real-time operator dashboards, session KPIs, energy consumption trends, fault detection.

Elasticsearch Logging Monitoring Dashboards
⚙️

Billing Engines

Multi-mode billing: time-based, energy-unit, amount-based. Flexible pricing plan management for different host segments.

Billing Pricing Plans Background Jobs Scheduling
Experience

Where I've worked

Building production-grade systems that serve EV consumers, fleet operators, and enterprise clients across India.

Enercent Technologies Pvt. Ltd.
Backend Software Engineer
Mar 2024 – Present · Bengaluru, India
Designed and built RESTful backend services for TruePower Home Charging — enabling residential EV owners to manage, schedule, and monitor home chargers via the mobile app.
Developed the Whitelist Management System for enterprise/fleet clients — restricting charger access to authorised RFID/vehicle identifiers with self-service operator portals.
Implemented OCPP 1.6J-compliant charge session lifecycle APIs — boot, authorisation, start/stop transaction, heartbeat, status notification workflows.
Integrated Razorpay Dynamic UPI QR payment system — end-to-end from QR generation through webhook-based verification and idempotent reconciliation pipelines.
Built a flexible billing engine supporting time-based, energy-unit-based, and amount-based pricing — enabling custom plans for different host segments.
Engineered Elasticsearch-based logging and monitoring pipeline for real-time visibility into session health, charger uptime, and payment events.
Developed pre-booking and advance reservation APIs — reducing queue wait times and improving utilisation at high-demand commercial stations.
Collaborated cross-functionally with firmware, mobile, QA, and client success teams in an Agile/Scrum environment from requirement scoping to production rollout.
CIT Ranchi, Jharkhand University of Technology
B.Tech — Computer Science & Engineering
2019 – 2023 · CGPA: 8.90 / 10
Graduated with 8.90 CGPA in Computer Science & Engineering — strong foundation in data structures, algorithms, operating systems, and databases.
Built college-level projects: Job Portal, Mark Sheet Generator, and Job Finder — hands-on web development and database design experience.
Core subjects: Core Java, SQL, C, Linux — certified in Core Java via Internshala Trainings.
Prior Diploma in Engineering (2017–2020) with 74.74% from XIPT, building strong engineering fundamentals.
Projects

Things I've built

Production systems powering real EV sessions, real payments, and real operators every day.

★ Featured
01
TruePower Home Charging System
Backend APIs for the residential EV home charging product — charger onboarding, real-time status, remote start/stop, charge scheduling, and RFID plug-and-play authentication. Deployed in production serving residential EV owners across India.
Ruby on Rails PostgreSQL OCPP 1.6J REST API RFID
★ Featured
02
Dynamic UPI QR Payment Integration
Real-time payment processing tied directly to active EV charge sessions. Razorpay Dynamic QR generation, idempotent webhook handlers for payment verification, and automated reconciliation pipeline — zero revenue leakage architecture.
Razorpay API Webhooks Ruby on Rails PostgreSQL Idempotency
03
EV Session Management Platform
Full OCPP 1.6J session lifecycle — boot notification, authorisation, transaction start/stop, meter values, and status updates over WebSockets. Pre-booking workflows for advance reservation at high-demand commercial stations.
OCPP 1.6J WebSockets Rails PostgreSQL Pre-booking
04
Whitelist Management System
Access-control system for CPOs and enterprise fleet clients. Authorised RFID/vehicle identifier management per charge point or station group. Self-service operator portal for policy management and reduced unauthorised usage incidents.
Ruby on Rails PostgreSQL REST API RBAC Fleet Ops
05
Elasticsearch Logging Pipeline
Webhook-based data ingestion feeding structured event logs into Elasticsearch. Powers operator dashboards with real-time KPIs: session health, payment success rates, charger fault detection, and energy consumption trends.
Elasticsearch Webhooks REST Analytics Monitoring
06
Flexible Billing Engine
Multi-mode billing system supporting time-based, energy-unit-based, and amount-based pricing. Enables customised pricing plans for different host segments — residential, commercial, fleet, and enterprise.
Rails PostgreSQL Background Jobs Billing Scheduling
Full Stack

The complete toolkit

Every tool I reach for, and why.

Languages

Ruby
Core Java
SQL
C
Bash / Shell

Frameworks & APIs

Ruby on Rails
REST API
WebSockets
OCPP 1.6J
Microservices

Databases & Search

PostgreSQL
MySQL
Elasticsearch
Redis (caching)
Background Jobs

Tools & DevOps

Git / GitHub
Linux
Docker (Basic)
Postman
Jira / Scrum
Contact

Let's work together

Open to backend engineering roles in EV/CleanTech, FinTech, or high-scale API platforms. Based in Bengaluru — open to remote.

📧
Email raghavkrsingh01@gmail.com
📱
Phone +91 6203929429
📍
Location Bengaluru, India
send_message.rb
# Drop me a line $ curl -X POST /contact