Haroon KhanSoftware Engineer / Product Builder
Software Engineer Product Builder

Digital products, engineered for thereal world.

Full-stack software engineer building AI-powered applications, scalable SaaS platforms, Python/FastAPI backends, and Next.js experiences from APIs and automation to technical SEO, cloud deployment, and production support.

What I build with
Product Engineering
Ruby on Rails
AI Integration
API Development
Cloud Delivery
01Selected Work
PRODUCTION PRODUCTS

Products builtfor real use.

Production products I've engineered, improved and delivered for businesses operating in the real world.

02Services
fiverr.Available to order securely
FREELANCE ENGINEERING SERVICES

Expertise you canhire directly.

Need a product built, AI added, a broken app rescued, or an application deployed? Choose the service that matches your project.

02INTEGRATE

AI Integration & API Automation

Integrate OpenAI, Claude, Gemini and other AI APIs into existing products. Build intelligent workflows, custom API endpoints, AI-powered features and business automation without unnecessarily rebuilding your application.

OpenAIAI APIsFastAPIAutomation
AVAILABLE ONFiverr
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03RESCUE

App Debugging, Fixes & Optimization

Diagnose and fix broken websites, SaaS applications and AI-built products. Resolve frontend and backend bugs, API failures, authentication issues, database errors and deployment problems, while improving performance and production readiness.

Bug FixesReact / Next.jsAPIsPerformance
AVAILABLE ONFiverr
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04DEPLOY

Cloud Deployment & Production Engineering

Deploy, configure, migrate and troubleshoot applications built with Python, FastAPI, Next.js, Ruby on Rails and other web technologies. Handle hosting, DNS, SSL, environment variables, databases, CI/CD and production issues.

AWSDigitalOceanHerokuCI/CD
AVAILABLE ONFiverr
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SOMETHING MORE CUSTOM?Tell me about the product you want to build.
Discuss your project
03Experience
5+ YEARS IN PRODUCTION
PROFESSIONAL JOURNEY

Experience shapedin production.

From Ruby on Rails engineering to full-stack development with Python, FastAPI, Next.js, AI integrations, SaaS applications, payments, cloud infrastructure, and production systems.

2021Professional journey started
Rails → ProductBackend depth with end-to-end delivery
01
2026Dubai / Remote
Rise & Shine Tourism

Software Engineer

Built and improved customer-facing tourism experiences, booking workflows, responsive interfaces, performance, and search visibility for a production travel business.

Designed and developed the production company website.Built booking workflows to reduce manual reservation handling.
JavaScriptBooking SystemsSEONetlifyPaypal Integration
02
Sep 2022 — Jan 2026Remote
MedHunter

Ruby on Rails Engineer

Worked on a production medical-education marketplace with bookings, schedules, payments, subscriptions, user workflows, and cloud deployment operations.

Developed marketplace booking and scheduling workflows.Integrated Stripe and Asaas payment infrastructure.
Ruby on RailsPostgreSQLStripeHerokuAsaas Payment GatewayGoogle APIs
03
Sep 2021 — Aug 2022Lahore, Pakistan
EritheiaLabs

Junior Software Engineer

Started my professional software-engineering journey working with Ruby on Rails in a real product environment, shipping features and resolving production issues.

Debugged and resolved application issues.Contributed to Rails feature development and UI improvements.
Ruby on RailsJavaScriptGitWeb Development
04 About
SOFTWARE ENGINEER / PRODUCT BUILDER
Haroon Khan, Software Engineer and Product Builder
HK / 04 Available
SOFTWARE ENGINEER Haroon Khan
Product Builder
5+ Years building production software
Global Remote collaboration across markets
Full-stack Backend to product delivery
THE ENGINEER BEHIND THE PRODUCTS

Backend depth.Product thinking.Delivery ownership.

I build software with one question in mind: will this actually work well in the real world?

My professional journey started with Ruby on Rails and backend development and expanded into full-stack product engineering with Python, FastAPI, Next.js, TypeScript, AI integrations, payment systems, cloud infrastructure, and technical SEO. I build new products, improve existing applications, and help businesses deliver reliable software.

I enjoy working beyond implementation — understanding the problem, making technical decisions, shipping the product, and improving it after real users begin interacting with it.

HOW I WORK Engineering principles
01

Product-first thinking

I look beyond individual tickets and think about the complete product, user journey, business requirement, and long-term maintainability.

02

Production-minded engineering

Performance, architecture, security, deployment, integrations, and operational reliability are part of how I approach development.

03

End-to-end ownership

I’m comfortable moving from backend logic and APIs to frontend experiences, debugging, cloud delivery, and post-launch improvements.

CURRENTLY OPEN TO Selected engineering opportunities
Full-time rolesRemote rolesProduct workFreelance
05Toolkit
PRODUCTION STACK
TECHNOLOGY WITH PURPOSE

Tools I trustin production.

I choose technology around the product, architecture and delivery requirements — not because a framework happens to be trendy.

01

Core Engineering

Backend languages, frameworks and databases for reliable APIs, SaaS platforms and business applications.

PythonBackend Development
FastAPIPython API Framework
Ruby on RailsBackend Framework
RubyProgramming Language
PostgreSQLDatabase
JavaScriptWeb Engineering
02

Product & Web

Modern frontend frameworks, product interfaces, cloud-backed applications and payment integrations.

Next.jsReact Web Framework
ReactFrontend Development
TypeScriptApplication Code
AstroModern Web
FirebaseProduct Backend
StripePayments
03

Cloud & Delivery

Infrastructure and deployment platforms used to take applications from development into production.

AWSCloud Infrastructure
HerokuApplication Hosting
NetlifyWeb Delivery
CloudflareEdge & Storage
04

Workflow & AI

Version control, developer collaboration, AI-powered integrations and intelligent application workflows.

DigitalOceanCloud Hosting
GitHubCollaboration
AI APIsOpenAI · Claude · Gemini
GitVersion Control
06 Frequently Asked Questions
WORKING TOGETHER
BEFORE WE GET STARTED

Questions beforewe build together?

Clear answers to the things clients usually want to know before starting a software project, integration, deployment, or longer-term engineering engagement.

Clear scope before development
Production-minded implementation
Direct communication throughout
Still have a question? Tell me about your project
01What kind of projects can you help me build?

I work on SaaS products, MVPs, business applications, Ruby on Rails platforms, APIs, booking and payment systems, admin dashboards, AI integrations, and production-ready web applications. I can help with both new products and existing systems that need further engineering.

02Can you work on an existing application?

Yes. I regularly work with existing codebases to add features, resolve bugs, improve application workflows, integrate APIs, strengthen backend architecture, improve frontend experiences, and prepare products for reliable production use.

03Can you fix apps built with Lovable, Bolt, Replit, or other AI tools?

Yes. If an AI-built application is stuck with broken APIs, authentication issues, database problems, incomplete workflows, deployment failures, or production bugs, I can inspect the existing project and help turn it into a working application.

04Can you add AI features to my existing product?

Yes. AI can be added without rebuilding your entire application. Depending on the product, I can help integrate AI APIs, intelligent workflows, automation, assistants, content features, and other application-specific AI capabilities.

05Do you handle deployment and cloud setup too?

Yes. I can help deploy and configure web applications using platforms such as AWS, Heroku, DigitalOcean, and Netlify, including domains, SSL, environment configuration, databases, DNS, and production deployment troubleshooting.

06How do we start a project together?

Start by sharing what you are building, what already exists, and where you need help. I will review the requirements, clarify the scope, suggest an implementation approach, and agree on the next steps before development begins.

07How much will my project cost?

Pricing depends on the scope, technical complexity, existing codebase, integrations, and expected timeline. After reviewing your requirements, I can provide a clearer estimate or break the work into practical milestones.

08How long does development usually take?

Small fixes and focused integrations may take a few days, while larger features, MVPs, or full products can take several weeks or more. I provide a realistic timeline after reviewing the actual requirements rather than giving a generic estimate.

09Can I hire you through Fiverr?

Yes. If you prefer Fiverr for ordering, payments, milestones, and project communication, my software engineering services are available there. You can also contact me directly through this portfolio before deciding how you would like to proceed.

10Do you provide support after launch?

Yes. Post-launch support can include bug fixes, deployment assistance, performance improvements, feature enhancements, integrations, and ongoing engineering work depending on the needs of the product.

11Are you available for full-time or long-term opportunities?

Yes. In addition to project-based work, I am open to selected full-time, remote, long-term, and product engineering opportunities where my backend, full-stack, product, AI integration, and cloud experience is relevant.

12Do you develop applications using Python and FastAPI?

Yes. I work with Python and FastAPI for backend APIs, application logic, service integrations and full-stack products. My current InnoValuation project combines a Python/FastAPI backend with a Next.js and TypeScript frontend.

13Can you build a full-stack application with Next.js?

Yes. I work with Next.js, TypeScript, backend APIs and databases to build responsive web applications, dashboards and SaaS products. I can also help connect an existing frontend to a new or existing backend.

14Can you integrate AI into an existing website or SaaS application?

Yes. I can help integrate AI APIs, intelligent workflows, automated processing and application-specific AI features. I review the existing architecture first so new functionality fits the product rather than creating unnecessary complexity.

15Can you help with technical SEO and website performance?

Yes. I can implement technical and on-page SEO improvements including metadata, canonical URLs, structured data, XML sitemaps, robots.txt, mobile responsiveness and website performance optimization. I focus on technical improvements rather than promising specific search rankings.

16Can you troubleshoot security and authentication problems?

Yes. I can investigate authentication issues, access-control problems, API configuration, dependency vulnerabilities and other application security concerns. The scope depends on the technology stack and the type of assessment or remediation required.

07 Contact
LET'S BUILD SOMETHING USEFUL
START A CONVERSATION

Have a productworth building?

Tell me what you're working on, where the product currently stands, and what you need help shipping.

Available
Open to selected engineering work Full-time roles · Remote opportunities · Product work · Freelance
PROJECT INQUIRY Tell me about your project.
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