I will build and modernize your scalable saas web application


About this gig
Do you need a SaaS product that can grow without becoming difficult to maintain?
I build and modernize production-ready SaaS web applications for founders and businesses. I can develop a focused MVP or improve an existing platform, covering architecture, database design, frontend, APIs, authentication, payments, testing and deployment.
My background includes a production electronic invoicing SaaS built with about 10 microservices, API keys, webhooks, role-based access, audit logs, queues and cloud infrastructure.
I can help with:
- SaaS MVPs and business web applications
- React, Next.js, Vue, Laravel, NestJS, Go and .NET
- PostgreSQL, MySQL, SQL Server and MongoDB
- REST APIs, webhooks and third-party integrations
- AWS, Azure, Docker and CI/CD
- Performance, testing and legacy modernization
You will receive maintainable work, clear documentation and a defined delivery scope.
Please message me before ordering so I can review your requirements and recommend the right package.
Get to know Yair Chan
You can't improve what you can't measure
- FromMexico
- Member sinceDec 2021
- Avg. response time1 hour
- Last delivery1 year
Languages
English, Spanish
My Portfolio
Other Software Development Services I Offer
FAQ
Can you work with my existing codebase?
Yes. I can review an existing application, identify the safest implementation path and work within its current architecture. Repository access and setup instructions are required.
Which technologies do you use?
I work with React, Next.js, Vue, Laravel, NestJS, Node.js, Go, .NET, SQL and cloud services. I choose the stack that fits the product and existing system.
Is hosting included?
Deployment can be included when it is listed in the package or purchased as an extra. Hosting accounts, domains and third-party usage fees are paid by the client.
Will I receive the source code?
Yes. You receive the source code produced for the order and concise setup or handoff documentation.
Do you provide support after delivery?
I fix defects that are within the approved scope during the revision period. Ongoing maintenance and new features can be arranged separately.
Can you sign an NDA?
Yes. Send the NDA through Fiverr before sharing confidential information.
3 reviews for this Gig
| (3) | ||
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
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R rexx_ai

Mexico
Excelente! muy bueno
$50-$100
Price
2 weeks
Duration
Helpful?R rexx_ai

Mexico
Muy muy bueno, recomendado ampliamente
$100-$200
Price
3 weeks
Duration
Helpful?V 
visualsandsound

Mexico
Working with this seller was an amazing experience! Great communication, listened to all my feedback and in the end got the website I wanted! HIGHLY RECOMMENDED!
$100-$200
Price
Helpful?
3 reviews for this Gig
| (3) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
R rexx_ai

Mexico
Excelente! muy bueno
$50-$100
Price
2 weeks
Duration
Helpful?R rexx_ai

Mexico
Muy muy bueno, recomendado ampliamente
$100-$200
Price
3 weeks
Duration
Helpful?V 
visualsandsound

Mexico
Working with this seller was an amazing experience! Great communication, listened to all my feedback and in the end got the website I wanted! HIGHLY RECOMMENDED!
$100-$200
Price
Helpful?

