Away — last seen 3d ago

Arpan Bhandari

Software engineer building platform infrastructure, AI systems, and developer tools — backend services and internal platforms that carry 10K+ users and over a million requests a day.

Now — Software Engineering Intern @ Codapulse GlobalB.S. Computer Science @ Southern Miss

Get in touch

Selected work ↓

GitHub ↗

Selected Work

Systems I've designed and shipped

01AceActiveOpen-source AI coding workspaceTypeScriptBunAgent OrchestrationWebSockets

02author.jsActiveType-safe authorization frameworkTypeScriptAuthorizationRBAC / ABAC / ReBAC

03JoorActiveHigh-performance RPC frameworkTypeScriptRPCRuntime InternalsCodegen

04Cort33xResearch35M-parameter language model, trained locallyPythonPyTorchTransformersLocal Training

05BumblebeeActiveRL-powered desktop automation runtimePythonReinforcement LearningAutomationInteraction Modeling

Experience

Where I've built

May 2026 — PresentOn-site

Software Engineering Intern

Codapulse Global

Platform infrastructure across three enterprise products — a construction CMS, an education platform, and a restaurant operating system.

Design backend infrastructure, APIs, authorization, and shared platform architecture for Sitora CMS — an enterprise construction management platform spanning Bun, Elysia, Next.js, Expo, PostgreSQL, Redis, and shared typed contracts.
Build internal automation for Skolora, supporting 10K+ active users and 1M+ daily server requests: workflow automation, RBAC optimization, ID-card generation, AI recommendations, DRM, and live-class infrastructure.
Develop Servo RMS, a restaurant operating platform — POS, QR ordering, payments, accounting, inventory, reporting, and desktop cashier workflows for 100+ restaurants preparing for launch.
Build AI-assisted internal engineering workflows that automate repetitive development tasks while improving consistency and delivery speed.

BunElysiaNext.jsExpoPostgreSQLRedis

Dec 2022 — Jul 2024Remote

Software Engineer

Freelance

Shipped production systems end-to-end for clients: CRM, education, and hospitality platforms.

Engineered a distributed CRM platform, increasing workflow throughput by 150% through asynchronous processing and backend automation.
Built a production exam simulation platform serving thousands of learners with secure authentication and scalable deployment.
Developed a hotel booking platform using GraphQL, PostgreSQL, AWS, and payment integration.
Built CI/CD pipelines with GitHub Actions and Docker, reducing deployment time by 40% while improving release reliability.

Node.jsGraphQLPostgreSQLAWSDocker

Capabilities

What I work with

Languages

TypeScriptPythonGoC++SQL

Backend

BunNode.jsElysiaFastAPIGraphQLWebSocketsCloudflare Workers

Frontend

ReactNext.jsExpoReact NativeElectronTailwind CSS

Data & Infrastructure

PostgreSQLRedisMongoDBDrizzle ORMDockerAWSGCP

AI & ML

PyTorchMLXHugging FaceReinforcement LearningOpenAI API

Core

Distributed SystemsSystem DesignDeveloper ToolingAuthorization (RBAC/ABAC/ReBAC)Performance Optimization

Live from GitHub

Proof of work

@arpan404 →

0Contributions307 active days

0Commitsacross 8 repos

0Pull requests38 issues · 12 reviews

0Day streaklongest 50 days

JulAugSepOctNovDecJanFebMarAprMayJunJul

MonWedFri

TypeScript 38.2%Python 14.7%JavaScript 11.8%HTML 11.8%C++ 5.9%Lua 2.9%

★ 78 stars · 48 public repos · 19 followersbusiest day — Jun 18 · 499 contributions

The build yard

Watch recent GitHub work get laid brick by brick — hover for details, click to open on GitHub.

Recognition

Honors

Generation Google Scholar

2024 cohort — awarded for engineering excellence and leadership.

President's List × 3 & Dean's List

University of Southern Mississippi.

DeepLearning.AI — Machine Learning Specialization

Completed specialization covering supervised learning through RL.

B.S. Computer ScienceMinor in Entrepreneurship · University of Southern MississippiAug 2024 — Present

Writing

Notes on building software

All writing →

June 14, 2026

Small models, sharp lessons

What training a 35M-parameter language model on a single local GPU teaches you that fine-tuning APIs never will.

2 min readMLLocal Training

May 2, 2026

Authorization is a data problem, not a middleware problem

Why access control checks scattered through route handlers always rot, and what it takes to make authorization a first-class, queryable part of your system.

2 min readBackendSecurityAPI Design

Contact

Let's build something worth shipping

contact@arpan.sh

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