You will get a production-ready SaaS MVP for your business
Project details
I am a senior full-stack developer specializing in web applications, APIs, SaaS products, MVPs, and custom business software.
My role is to turn an operational need into a clear, maintainable, and genuinely useful product. I do not simply implement features: I help structure the scope, identify the core user journey, and make technical decisions that support both the initial launch and future product growth. I prioritize transparent scope definition, regular communication, pragmatic technology choices, structured and maintainable code, and clear documentation.
Depending on the selected package, your project may include a responsive web interface, authentication, user roles, dashboards, backend APIs, business logic, administration tools, payments, transactional emails, and third-party integrations.
You will receive a functional application, complete source code, deployment support, and handover documentation so the product can be maintained and extended confidently.
My goal is to deliver a reliable product you can use with real customers, present to investors, or integrate into your daily business operations.
My role is to turn an operational need into a clear, maintainable, and genuinely useful product. I do not simply implement features: I help structure the scope, identify the core user journey, and make technical decisions that support both the initial launch and future product growth. I prioritize transparent scope definition, regular communication, pragmatic technology choices, structured and maintainable code, and clear documentation.
Depending on the selected package, your project may include a responsive web interface, authentication, user roles, dashboards, backend APIs, business logic, administration tools, payments, transactional emails, and third-party integrations.
You will receive a functional application, complete source code, deployment support, and handover documentation so the product can be maintained and extended confidently.
My goal is to deliver a reliable product you can use with real customers, present to investors, or integrate into your daily business operations.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$3,800
|
Standard
$5,500
|
Advanced
$7,500
|
|---|---|---|---|
| Delivery Time | 21 days | 35 days | 45 days |
Number of Revisions | 2 | 2 | 3 |
Number of Pages | 6 | 10 | 15 |
Design Customization | |||
Content Upload | - | - | - |
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Advanced SaaS Architecture and Features
(+ 10 Days)
+$1,650
Integration With Your Existing Ecosystem
(+ 6 Days)
+$770
AI-Powered Feature
(+ 8 Days)
+$990Frequently asked questions
About William
Senior Full Stack Developer | MVP, SaaS, AI
Paris, France - 12:17 am local time
With 10 years of experience in front-end and back-end development, I help startups, entrepreneurs, and small to mid-sized businesses turn ideas into functional, fast, and scalable web applications.
Whether you need a SaaS MVP, a custom dashboard, a business application, or a complex third-party integration, I focus on delivering practical solutions with a clear scope, predictable progress, and maintainable code.
## What I Bring to Your Project
- End-to-end full-stack development: React, Vue.js, Node.js, Ruby on Rails, PostgreSQL, MySQL, MongoDB, Docker, and Kubernetes
- Product-focused experience: I have launched several SaaS products of my own, including a data platform, a link-in-bio tool, and an online directory. I understand product and business challenges, not just technical implementation.
- Fast, iterative delivery: I work in short development cycles and provide intermediate versions so you can review progress and validate decisions early.
- Clear written communication: Project updates, technical decisions, tickets, and documentation are handled in writing for clarity and traceability.
- Maintainable solutions: I prioritize clean architecture, structured code, appropriate technology choices, and documentation that makes future development easier.
## Typical Projects
- Conversion-focused landing pages with custom admin panels
- SaaS MVPs with authentication, dashboards, subscriptions, payments, and APIs
- Custom business applications and internal tools
- Third-party API integrations and data-processing systems
- Refactoring and modernization of existing applications
- Backend and API development
- Deployment, infrastructure configuration, and DevOps support
I am available for fixed-scope projects, ongoing freelance work, and long-term technical partnerships.
Send me a message with an overview of your project, current challenges, and expected outcome, and I will help you identify the best way forward.
Steps for completing your project
After purchasing the project, send requirements so William can start the project.
Delivery time starts when William receives requirements from you.
William works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery and Scope Definition
We discuss your product, target users, main workflow, business rules, and technical requirements. The final scope must be reviewed and approved before development begins.
Architecture and Product Planning
I define the application structure, database model, main components, integrations, and implementation priorities.