I learn with AI, not against it — every tool is a teacher if you let it be.
🛡️❤️🔥 On a mission to show developers the credentials they didn't know were public — AWS keys, Kaggle tokens, JWTs, API secrets, private access tokens — sitting exposed in commit history, before someone else finds them first, via RepoGuard.
Cloud & Full-Stack Developer | AWS re/Start Trainee | BCA (Hons) · CGPA 9.40
Building scalable, event-driven, cloud-native applications · Habra, West Bengal, India
I'm Rahul Biswas — a cloud and full-stack developer building event-driven systems that bridge application logic and cloud infrastructure, backed by hands-on AWS training and a growing portfolio of production-style projects and developer tooling.
On the cloud side, I've worked extensively within the AWS re/Start program — provisioning EC2 instances with launch templates and AMIs, designing VPCs with public/private subnets, NACLs, and route tables, deploying multi-AZ RDS Aurora clusters, migrating databases via AWS DMS, and authoring YAML/JSON CloudFormation templates for full-stack infrastructure provisioning. I've also built event-driven serverless applications using Lambda + API Gateway, configured Auto Scaling groups with ELB and Route 53 failover routing, and monitored infrastructure through CloudWatch alarms and CloudTrail audit logs.
On the dev side, I focus on systems that stay reliable under real conditions — queues, retries, and real-time updates — not just features that work in a demo. Recent work includes the Incident Response & Escalation Engine (a PagerDuty-style platform with BullMQ + Redis background workers and Socket.io real-time dashboards), RepoGuard (a local security auditing tool that scans full git history for leaked secrets, combining Gitleaks with optional AI-powered document scanning), a production-grade REST API built on the Controller-Service-Repository pattern with idempotent payments and cursor pagination, QuickForm (a SaaS-style drag-and-drop form builder with async email queues), PortfolioEcosystem (a full CMS platform with JWT auth, Redis caching, and Cloudinary uploads), EasyPetPuja (a canteen booking system with Razorpay integration), and QuickChat (a multi-threaded Java TCP chat server tested to 50+ concurrent connections). I've also gone deeper into systems programming, building CShell (a Unix shell written from scratch in C) and libdsc (a from-scratch C data structures library tested with Valgrind).
Currently exploring Generative AI on AWS — SageMaker, Bedrock, and Prompt Engineering. Actively preparing for AWS Certified Solutions Architect – Associate (SAA-C03). Comfortable in Linux, Bash scripting, Git, and REST API design.
- 🎓 BCA (Honours) at Brainware University — CGPA 9.40 / 10
- ☁️ 30+ hands-on AWS labs — EC2, S3, Lambda, RDS, VPC, CloudFormation & more
- 🛡️ Built RepoGuard, an open-source secret-scanning audit tool (Python + Gitleaks)
- 📫 rahulbiswas006677@gmail.com
- 💼 Open to Cloud, DevOps, or Full-Stack internships / fresher roles
- 🌱 Currently learning: Terraform · Docker · Kubernetes basics
Cloud (AWS)
Languages
Web, Realtime & Databases
Security & DevOps
Data & ML
| Internship | Description | Stack | Status |
|---|---|---|---|
| RixiLab-Internship-Portfolio | 8-week Full Stack Development Intern at Rixi Lab Technologies (Intern ID: RL26080701) — built the Dynamic Blogging Platform (FS07P3A), a containerized MERN app with JWT auth, a rich-text editor, real-time search, and likes/comments |
React 19 · Node.js · Express · MongoDB · Tailwind CSS v4 · Docker | 🟡 In Progress |
| Project | Description | Stack | Status |
|---|---|---|---|
| ❤️🔥 RepoGuard | Local security auditing tool that scans public GitHub repos' full commit history for leaked secrets — combines Gitleaks with optional AI-powered document scanning | Python · Gitleaks · GitHub API | 🟢 Active |
| Incident-Response-Engine | Event-driven incident management platform (PagerDuty clone) with automated 15s escalation workflows via BullMQ + Upstash Redis, and a real-time Socket.io dashboard with optimistic UI | Node.js · Express · React · PostgreSQL · Prisma · BullMQ · Redis · Socket.io | 🟢 Active |
| CShell | Unix shell written from scratch in C — supports piping, I/O redirection, background jobs & built-in commands, no external shell dependencies | C · Unix · System Programming · Makefile | 🟢 Active |
| libdsc | From-scratch C library implementing linked lists, stacks, queues, BSTs & a chained hash table, tested with Valgrind | C · Data Structures · Hash Table · Valgrind | 🟢 Active |
| ProductionReadyNodeAPI | Production-ready REST API with CSR architecture, idempotent payments, cursor pagination & Prisma/PostgreSQL | Node.js · Express · Prisma · PostgreSQL · Jest | 🟢 Active |
| QuickForm | SaaS-style drag-and-drop form builder with async email queues, CSV export & public form sharing | Node.js · React · Prisma · Redis · BullMQ · Vercel | 🟢 Live |
| PortfolioEcosystem | Full-stack portfolio CMS with JWT auth, BullMQ queues, Redis caching & Cloudinary uploads | Node.js · Prisma · Neon PostgreSQL · React · Vite | 🟢 Live |
| EasyPetpuja | University canteen meal booking system with role-based portals & Razorpay payments | Node.js · Express · EJS · MongoDB · Razorpay | 🟢 Complete |
| QuickChat | Real-time, multi-threaded Java TCP chat server tested to 50+ concurrent users, with Swing GUI client | Java · Sockets · Multithreading · Swing | 🟢 Complete |
| MicroblogApplications | Full-stack microblogging starter with session-based auth and profile management | React · Express · MongoDB | 🟢 Complete |
| CurrencyConvertor | Desktop currency conversion app with local CSV transaction logging | Python · Tkinter · ttkbootstrap | 🟢 Complete |
| AWSRestart | Multi-tier café app on AWS: EC2, RDS Aurora, DMS migration, S3, IAM, CloudWatch | EC2 · RDS · S3 · DMS · CloudWatch | 🟡 In Progress |
| LeetCode-SQL | Structured SQL solutions for LeetCode database challenges — joins, window functions, query optimization | MySQL · PostgreSQL | 🟢 Active |
| Repository | Focus |
|---|---|
| fs07p1a__TaskManager | Backend-driven To-Do List app with strict MVC architecture & server-side rendering |
| FullstackLabBca | Full-stack fundamentals — modular code, CRUD, middleware |
| CorePythonFundamentals | Python scripts on geometry, arithmetic & data manipulation |
| DsaLabAssignments | C programs for core data structures & algorithms |
| DBMSAcademicAssignments | SQL / PL-SQL assignments for the DBMS course |
| C-Logic-Vault | Modular C programs on core programming concepts |
| OopsJavaExercise | OOP principles, multithreading, exceptions & Collections in Java |
| JavaDsa | Java algorithms & OS scheduling (FCFS, LRU) |
| ProjectReports | Technical documentation, cloud architecture diagrams & research reports on AI safety frameworks and infrastructure guardrails |
| CV-And-Resume | Resume & CV source files |
| RixiLab-Internship-Portfolio | Full-stack projects from an 8-week internship at Rixi Lab Technologies |
- 🎯 AWS re/Start — Cloud Solutions Architect Associate track (Ongoing, 2026)
- ✅ AWS Certified Cloud Practitioner (CLF-C02) — Amazon Web Services
- ✅ Programming in Java — NPTEL · IIT Certification (Jan–Apr 2025)
- ✅ Data Representation & Visualization — Brainware University (Jul–Aug 2024)
- 📘 Preparing for: AWS Certified Solutions Architect – Associate (SAA-C03)
"First, solve the problem. Then, write the code." — John Johnson