Portfolio

Kuldeep Singh

Software Engineer and AI Enthusiast

High-throughput backends in Go and Python — payments, wallets, and AI workflows.

person.ts

 1 const Person = {
 2   name: "Kuldeep Singh",
 3   role: "Software Engineer and AI Enthusiast",
 4   hobbies: [
 5     "Software Development",
 6     "Music Instrument",
 7     "Traveling",
 8   ],
 9   age: 24,
10 }

Get in touch View resume

$1M+: Payment volume
10+: AI tool integrations
98%: Production uptime

About me

A bit of context on how I build and what I care about.

Hi, I'm Kuldeep Singh, a Software Engineer with 2+ years building high-throughput backend systems in Go and Python across wallets, payouts, and cross-border payments.

At Unplex I shipped a USA-to-India payment corridor processing $1M+ in volume, plus an MCP server with OAuth 2.0 that powers 10+ internal AI tool integrations.

I own services end to end — API design, data pipelines, encryption, and production debugging under SLA pressure — and I use OpenAI, RAG, and tool calling where they make the product faster.

I completed my B.Tech in Computer Science (CGPA 8.08) and I’m always open to teams building payment infrastructure and AI-integrated platforms.

Kuldeep Singh - Software Engineer and AI Enthusiast

Articles

Notes on systems, payments, and building with AI.

View all

Stack

The tools I reach for when building production systems.

Golang
PostgreSQL
MySQL
Kafka
Docker
AWS
Python
Gin
OpenAI
Git

Also used

Java
SQL
Prompt Engineering
Tool/Function Calling
RAG
MCP
REST APIs
Microservices
OAuth2
JWT
RSA/AES
Spring Boot
Hibernate
MongoDB
DynamoDB
EC2
S3
RDS
Lambda
CloudFront
GitLab CI/CD
Linux

Education & experience

Where I studied and where I've shipped production systems.

Education

Lovely Professional University

Bachelor of Technology, Computer Science — CGPA 8.08 / 10

2020 – 2024 · Phagwara, Punjab

Saraswati Vidhya Mandir

12th PCM

2012 – 2019 · Higher Secondary (Science)

Work

Unplex

Software Engineer I

May 2025 – Present · Remote

Architected a USA-to-India business payment corridor — beneficiary onboarding, account setup, and payment cron scheduling — powering $1M+ in business transaction volume.
Engineered an MCP server with OAuth 2.0, supporting 10+ internal AI tool integrations.
Delivered GenAI WhatsApp workflows on OpenAI APIs for intent detection and action execution, cutting average response time by 35%.
Developed Python validation services for structured LLM outputs, reducing malformed outputs by 25%.
Built RAG workflows over policies, FAQs, and internal docs, improving intent-detection accuracy by 20%.
Designed prompt templates, tool calling, and guardrails, reducing unsafe or invalid LLM responses by 30%.
Automated support via n8n workflows on the MCP server, cutting manual turnaround for routine requests by 40%.
Instrumented logs and metrics across prompts, inputs, and model outputs, reducing misclassification issues by 20%.

NUPAY

Associate Software Engineer

Aug 2023 – May 2025 · Gurgaon, India

Maintained Go and Python microservices for wallets, payouts, and notifications, sustaining 98% production uptime.
Shipped a Go microservice for NPCI eMandate with hybrid encryption, powering mandate creation for 10,000+ users daily.
Launched a virtual account microservice supporting 50,000+ accounts, improving reconciliation accuracy and cash-flow visibility by 30%.
Implemented bulk payment processing for up to 5,000 transactions per request, improving operational efficiency by 45%.
Integrated IDFC, Yes Bank, and RBL using RSA/AES secure communication libraries.
Debugged production issues across APIs, data pipelines, and configs under tight SLAs.