BUILDINGDIGITALPRODUCTSTHAT PEOPLEactually use.
About Me
Founder of Existify. I build high-fidelity MVPs & startup software people actually love and scale.
Current Focus
Active endeavors & interests.
Building
Existify
A premium MVP development agency launching high-fidelity startup products in days.
Exploring
AI Products
Integrating Large Language Models and custom multi-agent chains into interactive SaaS applications.
Learning
Growth Systems
Studying user conversion loops, pricing mechanics, and startup distribution strategies.
Writing
Product Insights
Documenting lessons on shipping fast, minimizing technical debt, and prioritizing product thinking.
My Story
How I went from writing scripts to launching products.
The Past: I started as a self-taught developer, writing lines of code to build interfaces. While I loved the programming process, I felt a gap between technical output and actual user experiences.
The Transition: Over time, I discovered my passion lay in product design and startup strategy. I realized that a beautiful codebase is useless if the product fails to deliver core user value or align with business goals.
The Present & Future: Today, as the founder of Existify, I help startup founders conceptualize, validate, and launch their software products fast. My long-term goal is to build a portfolio of meaningful software businesses.
What I Help With
Structured ways I add value to startups.
Launch a New Product
Get your MVP or startup product built and shipped lightning fast. High-fidelity layouts, database architecture, and smooth deployment through Existify.
Embedded Engineering
Become a dedicated extension of your team. Integrating backend architecture, slick frontend details, and collaborative features into your current roadmap.
Technical Strategy
Deep-dive consultations to review project architecture, refine technology choices, map database schemas, and align development timelines.
Proof
Case studies of products launched.
Startup Products & MVPs
Existify
Built for founder conversionsA startup-focused MVP studio website designed to convert founders into qualified discovery calls through clear positioning, outcome-driven messaging, and streamlined user journeys.
Vidimix
Saved 70% creation timeAI-powered digital content automation SaaS that streamlines video creation pipelines, reducing video production workflows for early adopters by 70%.
High-Conversion Web Experiences
Divinity
Stunning UI & optimal performanceAn elegant web application and landing page with modern design and animations.
Sahil Mondal Portfolio v3
Generated inbound opportunitiesA conversion-focused personal brand website designed to showcase expertise, attract inbound opportunities, and establish authority as a startup-focused product engineer.
Services
Ways to Work Together
Choose the level of partnership that fits your needs. As an independent product engineer, I help founders turn ideas into shipped products with zero overhead.
Project Build
I build and ship your product from concept to deployment. Best for founders and businesses needing a specific product built.
- SaaS dashboards & internal tools
- Client portals & custom web apps
- AI-powered applications
- Marketing websites
- End-to-end development
- Deployment & handoff
Dedicated Product Engineer
Most PopularOnly 1 slot leftEmbed an experienced product engineer into your team without the cost of a full-time hire.
- Weekly feature delivery
- Frontend + backend development
- AI integrations
- Product improvements
- Team collaboration
- Ongoing technical support
Fractional Product Partner
Premium TierFor founders who need both technical leadership and execution.
- Product strategy & roadmap planning
- Technical architecture
- Feature prioritization
- Development execution
- Founder collaboration
- Technical leadership
Launch your product in days, not months.
Skip retainers. Existify builds high-converting SaaS, Web apps, and marketing experiences for a fixed price with a lightning-fast turnaround.
Workflow
How we build and launch.
Discovery
We align on your startup goals, business strategy, product features, and launch timeline constraints.
Planning
Draft the database schema, technical stack architecture, high-fidelity wireframes, and backlog priorities.
Building
Code frontend layers, setup backends, configure APIs, and execute continuous deployments in weekly chunks.
Iterating
Gather analytics, run speed audits, resolve user friction, and ship updates to maximize product conversion.
Frequently Asked Questions
What exactly is a 'Product Engineer'?
A product engineer is a full-stack developer who understands design and business. Instead of waiting for a spec document, I think from the user's perspective, design matching interfaces, design backends, and focus on conversion metrics.
How do you work alongside existing design/development teams?
Under the Embedded Engineer retainer model, I join your Slack/Discord, attend weekly standups, and pull tickets from Linear. I operate as an autonomous squad member, taking ownership of full features.
Why should we hire you instead of a cheap agency?
Agencies have heavy management layers, sales teams, and slow turnaround cycles. Working with me means direct access to a developer-founder who knows how to launch fast. If you need a complete agency-led MVP, I route you through Existify.
What is your typical stack?
I specialize in Next.js, Astro, and React, on the frontend, with Tailwind CSS for layout styling. For backends, I use TypeScript (Node/bun) with Nest.js or Hono framework, PostgreSQL or Supabase for databases, and Redis for caching. For hosting, I use Vercel, AWS or VPS
Insights
Lessons in product engineering.
Need a technical partner who understands products?
Whether you're launching a startup MVP or scaling an existing product experience, let's build something customers love.