SHUBHAM KASHYAPAvailable for select projects

Upwork · Top Rated Plus

Full Stack AI Developer · Multi-Tenant SaaS

AI SaaS, multi-tenant platforms, and production software: architecture, development, integrations, and deployment.

Direct collaboration from scope conversation through production delivery.

Top Rated Plus

Upwork talent

100%

Job success

37+

Production contracts

Repeat

Long-term clients

Verified Upwork history · 37+ production contracts · repeat and long-term clients

01Production work

Clients who trusted me with real products.

Live businesses, repeat engagements, and software used in production, not tutorial projects or concept screens.

Italylogoarena.com

LogoArena

A full-stack logo contest and marketplace platform.

Long-term partnership across frontend, backend, and ongoing delivery for a live Italian SaaS brand.

Next.jsMarketplaceSaaSLong-term

Italyhidingelephant.com

Hiding Elephant

AI logo generation SaaS for professional designers.

A repeat engagement covering the complete generation experience through production deployment.

AI generationNext.jsProduct UXSaaS

Canadausecortana.ai

UseCortana / AgentKong

A multi-channel AI sales agent with voice, text, and CRM.

Full-stack agentic CRM SaaS with agency accounts, native agent tooling, and deep CRM sync.

Next.jsAgentic CRMMulti-tenant SaaStRPC

Indiaigthreadly.com

IgThreadly

AI Instagram inbox and visual flow agent builder.

Messaging-first SaaS by RecallSync: Meta Instagram API inbox, node-based agents with HTTP tools, Slack and webhook integrations.

AI agentsInstagram APIFlow builderSaaS

02Selected case studies

A closer look at three production products I’ve built.

The products, systems, and technical work behind each engagement.

01Full-stack agentic sales CRM

UseCortana

A production SaaS for agencies selling AI-assisted outreach: sub-account structure, CRM depth, and agent workflows in one product, not a thin integration layer.

What I built

I led the Next.js and tRPC architecture and full-stack delivery: multi-tenant agency accounts, the in-app agent builder, conversation and lead systems, calendar, and GoHighLevel sync.

Next.js and tRPC foundation with type-safe APIs across the product
Agency model with unlimited sub-accounts, similar in shape to GoHighLevel
Two-way GoHighLevel sync via webhooks for contacts, tags, and custom fields
Native agent builder with import and export, plus full conversation history
Leads, tags, custom fields, and an integrated calendar for scheduling

5.0 rating · Product development · Ongoing product work

02Instagram inbox & agent SaaS

IgThreadly

Operators needed real DM automation through Meta's official API: multi-turn conversations, not one-off blasts, with agents that can branch, collect lead data, and call external tools.

What I built

I contributed full-stack product work on the SaaS: unified Instagram inbox, standard and flow-based agents, tool nodes for HTTP and webhooks, team workspaces, and lead assignment for sales teams.

Official Instagram messaging API integration and inbox UX
Visual flow builder with branches, handoffs, and objectives
Agent tool calls: CRM webhooks, Slack alerts, and custom HTTP endpoints
Workspace roles, lead sidebar, and operator-focused team settings

Live production SaaS · igthreadly.com · RecallSync product

03Long-term marketplace engineering

LogoArena

A live marketplace needed a technical partner who could keep delivering across evolving product requirements, not disappear after the first release.

What I built

I worked across frontend, backend, contest and marketplace workflows, maintenance, and ongoing production feature delivery.

Contest and marketplace flows
Multi-role product UX
Ongoing production delivery
Long-term codebase stewardship

5.0 rating · Long-term engagement · Ongoing production delivery

03Upwork history

The strongest claims are the ones clients make.

Verified contract outcomes from the platform where these engagements began.

Verified Upwork contract5.0

LogoArena · Frontend / Full Stack Developer

“Wow. It's been an absolutely incredible experience working with Shubham. Beyond the fact that he is a top developer and true expert in his field, he is also a great person and extremely easy to work with. Our project required both creative and logical thinking, and has multiple levels of complexity. Throughout all stages of our project, Shubham was able to help us plan, research, and execute our vision at the highest level, with patience, and attention to even the smallest of details. In fact, we haven't stopped working with Shubham, we're continuing straight on to another project with him. Thanks a lot Shubham! Looking forward to what's next!”

Long-term · Collaborative · Detail oriented · Committed to quality

Verified Upwork contract5.0

GoHighLevel CRM Pipeline Architecture & Workflow Automation Setup

“Shubham helped us rebuild our GoHighLevel CRM pipelines and workflow automation from the ground up. Our previous setup was messy and leads were getting lost between stages, but he structured the pipeline architecture and automation so everything now moves smoothly through the CRM. He also implemented lead follow-up workflows and improved how opportunities are tracked inside GoHighLevel. If you need someone who understands GHL pipelines, workflows, and automation systems deeply, Shubham is excellent.”

Endorsed by client · Committed to quality · Clear communicator · Accountable for outcomes

Verified Upwork contract5.0

UseCortana · Full-Stack Agentic Sales CRM & SaaS Platform

“Respectful, knowledgeable, honest and smart.”

SaaS Development Expert · Committed to quality · Professional

Verified Upwork contract5.0

LogoArena · Full Stack AI Developer

“Really enjoyed working with Shubham. He's creative, dependable, and easy to collaborate with. The work was completed on time, communication was great, and the work was always high-quality.”

Long-term · Reliable · Committed to quality · Clear communicator

Verified Upwork contract5.0

Hiding Elephant · Full Stack Development

“This was our second project working with Shubham, and just like the first, we had a fantastic experience working with him throughout the entire project! Both Shubham's skills and personality fit in perfectly with our company's culture and vision, and we're excited to continue working together on our new projects. Thanks Shubham!”

Repeat client · Endorsed · Collaborative

04How I work

I lead the delivery, not just the code.

You get a hands-on technical partner who turns ambiguity into decisions and keeps the build moving through production.

Architecture before velocity

I plan the data, integrations, system boundaries, and deployment path before complexity gets expensive.

Questions early

I remove ambiguity upfront and turn business requirements into concrete technical decisions.

Visible progress

You get clear updates on what is done, what is next, and what needs a decision.

Production delivery

I handle the path through QA, deployment, maintainability, and ongoing delivery, not just local code.

05Delivery approach

Sprint planning and AI-assisted development.

Structured for faster implementation, clearer scope, and nothing left to assumption.

From architecture through production: every phase planned, scoped, and tested.

Architecture first

Design the best-fit architecture from your requirements: data model, integrations, infra, and delivery path mapped before build starts.

Feasibility & R&D

Every component that may need research is identified upfront. No hidden assumptions, no surprises mid-build.

Phased scoping

Projects split into phases, then milestones per phase, so scope, cost, and progress stay transparent.

Sprint delivery

Work runs in planned sprints with AI-assisted development for faster, more consistent implementation.

Security & compliance

Auth, data isolation, access control, and compliance considerations built in, not bolted on at the end.

Testing & QA

Automated testing with Vitest and Cypress, plus manual QA, so production releases are reliable.

06Capabilities

What I can help you build.

Capabilities organized around outcomes, not a wall of technology logos.

Production AI SaaS

Multi-tenant platforms

Production MVP · direct or POC-first

AI Agent SaaS with native workflow builder

Multi-channel AI agent SaaS

Custom CRMs & portals

Internal tools & dashboards

CRM & API-connected SaaS

Supabase-backed SaaS products

Deployment & infrastructure

Stripe billing & subscriptions

Custom RAG · LangChain & Vercel AI SDK

Typical production stack

Tools I ship with most often, not a fixed menu.

Product

Next.js · React · TypeScript

Backend & data

Node.js · Python / FastAPI · PostgreSQL · Supabase · Prisma · Redis

AI & agents

OpenAI · Claude · Gemini · LangChain · Vercel AI SDK · RAG · MCP

Infra & integrations

Docker · Stripe · REST APIs · Webhooks

Technology is chosen based on project scope: whatever best fits the build. Other tools and frameworks are used when the project requires them.

07Next step

Think we could be a good fit?

Tell me what you're building. We can talk through the project, discuss the architecture and important technical decisions, and work out the right approach before development begins.

Upwork proposal screen with the Message button highlighted for replying to the proposal — Send me a message and let's talk about it.

Shubham Kashyap · Full-Stack AI DeveloperTop Rated Plus · 100% Job Success