You will get Fractional CTO for SaaS Founders. Java, Rails, AI, AWS Architect.
Top Rated
Top Rated
Project details
I plug in as the Fortune 500-grade Fractional CTO your stage cannot yet hire full-time. 15+ years across enterprise Java, Ruby on Rails, Shopify Plus, AI/RAG, AWS, Salesforce, SAP. Ex-Capgemini Solution Architect on engagements serving Fortune 500 names (Toyota, Caterpillar, Hershey). Founder of Aaitechs.
~ What gets shipped on a retainer: technology strategy and roadmap, engineering team oversight and hiring loops, architecture decisions, build vs buy calls, technical due diligence for fundraising, vendor and agency management, pre-sales and RFP architecture support. I review every pull request from my engineers and co-present in investor conversations when the technical scalability story matters.
~ Recent work: 8,257 hrs on Patient360 (HIPAA clinical AI, RAG + GPT-4o + deterministic validators, 98% accuracy, both contracts five-star). 48+ months on a CBRE Rails squad (Fortune 500, 100% uptime, 50% faster reports). Salesforce + GoHighLevel + Power BI RevOps stack (+52% lead velocity).
9,109 Upwork hours, 100% JSS, 12/12 five-star. IST with five hours of US/EU overlap. Reply within two hours on business days.
~ What gets shipped on a retainer: technology strategy and roadmap, engineering team oversight and hiring loops, architecture decisions, build vs buy calls, technical due diligence for fundraising, vendor and agency management, pre-sales and RFP architecture support. I review every pull request from my engineers and co-present in investor conversations when the technical scalability story matters.
~ Recent work: 8,257 hrs on Patient360 (HIPAA clinical AI, RAG + GPT-4o + deterministic validators, 98% accuracy, both contracts five-star). 48+ months on a CBRE Rails squad (Fortune 500, 100% uptime, 50% faster reports). Salesforce + GoHighLevel + Power BI RevOps stack (+52% lead velocity).
9,109 Upwork hours, 100% JSS, 12/12 five-star. IST with five hours of US/EU overlap. Reply within two hours on business days.
Programming Languages
JavaWhat's included
| Service Tiers |
Starter
$2,500
|
Standard
$8,000
|
Advanced
$14,000
|
|---|---|---|---|
| Delivery Time | 14 days | 30 days | 30 days |
Number of Revisions | 2 | 3 | 5 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
Optional add-ons
You can add these on the next page.
Technical due diligence pack
(+ 10 Days)
+$3,500
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DS
David S.
Apr 29, 2025
Go High Level integration
BP
Bhavesh P.
Mar 4, 2025
Salesforce Solution Architect
Gumansinh and his team successfully delivered the Salesforce Solution Architect role, ensuring a smooth project lifecycle from discovery to deployment. Their deep expertise in Salesforce architecture enabled them to design scalable solutions aligned with business goals. They led discovery sessions, provided valuable insights, and ensured best practices. Their commitment and collaboration were key to the project's success.
I will hire them again.
I will hire them again.
EH
Eric H.
Nov 24, 2022
UX/UI Design
Good work
OY
Orr Y.
Jun 23, 2022
React developer needs to build front end
Was always on time and available. Took time to understand requirements and delivered them in a timely manner. Overall great to work with!
JR
Jayadeepsinh R.
Jun 14, 2022
Power BI Developer
Excellent services with great skills. I will hire this team again for sure.
About Gumansinh
Fractional CTO & AI Architect | LLM ~ RAG ~ Agents | Java + Python
100%
Job Success
Ahmedabad, India - 11:25 pm local time
I architect and ship AI products. Java, Python, LLM and RAG systems, AI agents, full-stack, and a senior team that builds 100% of your spec.
I am 𝐆𝐮𝐦𝐚𝐧𝐬𝐢𝐧𝐡. For 15+ years I have built software, led delivery, and sat on the buying side of IT services, and today I work as a Fractional CTO and AI Architect for founders who are betting their company on getting the technology right.
Here is the deal I make with every client. You stay in the driver's seat. I run the machine. I sit with you through onboarding, turn what is in your head into a written plan and a real architecture, and then a senior engineering team I lead builds it, ten out of ten, against that exact plan. Nothing is called done until it matches what we agreed. I have closed twelve contracts on Upwork this way. Every one is five-star. 100% Job Success. Zero exceptions in over four years.
🔶 𝗪𝗛𝗔𝗧 𝗜 𝗔𝗖𝗧𝗨𝗔𝗟𝗟𝗬 𝗗𝗢
I am most useful when there is real AI in the build and a business riding on it.
✵ AI architecture and engineering : LLM applications on GPT-4o and Claude, retrieval-augmented generation on pgvector, Pinecone, and Qdrant, AI agents and multi-agent orchestration with LangGraph and the Model Context Protocol, evaluation harnesses so you can measure accuracy instead of hoping, and guardrails against prompt injection and hallucination inside a regulated boundary. I have shipped a clinical compliance agent that reads policy and unstructured notes, returns structured answers, and logs every decision for audit. Production AI, with the deterministic validators that keep a model honest. Not a demo.
✵ Java and Python backends : Enterprise Java and Spring Boot for the system of record. Python and FastAPI for the model, data, and orchestration layer. Microservices, event-driven design, REST and gRPC, Postgres, Kafka, Redis, and AWS underneath it all. This is the plumbing that turns an AI prototype into something a real company can run.
✵ Fractional CTO leadership : I plug in as the technology executive your stage cannot yet hire full-time. Architecture decisions, the roadmap, build versus buy, hiring the right engineers, code-quality bars, vendor and agency oversight, and technical due diligence for your next raise. I have done this for Series A and Series B founders and co-presented the technical story in their investor rooms.
✵ Full-stack and ecommerce : where it serves the product. React and Next.js front ends, Ruby on Rails SaaS, Shopify Plus and headless storefronts, Salesforce and CRM integration. I do not lead with this, but when an AI product needs a real interface and a real checkout, my team builds that too.
🔶 𝗛𝗢𝗪 𝗪𝗘 𝗪𝗢𝗥𝗞 𝗧𝗢𝗚𝗘𝗧𝗛𝗘𝗥
You and I own the relationship. I run your onboarding, capture every requirement in writing, set the architecture, and stay your single point of contact start to finish. Behind me is a hand-picked senior team, ten-plus years each on their stack, who write the code under my direction. This is not staff augmentation and it is not an offshore center handed your repo. I am in the code with them, reviewing pull requests and architecture, which is the direction most contractors are missing and the reason you stop paying for rewrites.
The promise is simple and I put it in writing on day one. We agree what done looks like before anyone writes a line, against acceptance criteria we can both measure. We build to that list. Everything ships to a staging URL for your sign-off before it counts. You get a written update on the days we work. Nothing is marked complete until it matches the spec, exactly. That is what I mean by ten out of ten on your requirements.
🔶 𝗪𝗛𝗬 𝗙𝗢𝗨𝗡𝗗𝗘𝗥𝗦 𝗧𝗥𝗨𝗦𝗧 𝗠𝗘
"Our client treated him as his own CTO, not an external employee. He built an AI-powered roadmap that reduced manual effort and gave them a real competitive advantage." (Bharat, Founder, Fourfold Tech)
"Outstanding professionalism, deep expertise, delivering high-quality results on time." (Healthcare SaaS, 4,409 hrs)
"Exceptional knowledge and dedication, consistently delivering results as requested." (Healthcare SaaS, 3,848 hrs)
🔶 𝗕𝗘𝗦𝗧 𝗙𝗜𝗧
AI and SaaS founders who need a Fractional CTO without giving up equity. Teams putting real AI into production under HIPAA, SOC2, or fintech rules. Founders who need an MVP architected right the first time. Operators modernizing a Java or legacy system to clean services on AWS. Engagements from $15K to $500K-plus.
Tell me what you have now and what you need next, in a couple of sentences. I will come back with a plan, a timeline, and a milestone or retainer proposal within two hours on business days.
𝐆𝐮𝐦𝐚𝐧𝐬𝐢𝐧𝐡.
Steps for completing your project
After purchasing the project, send requirements so Gumansinh can start the project.
Delivery time starts when Gumansinh receives requirements from you.
Gumansinh works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery + audit week (Week 1).
Read the production codebase, interview the engineering team, map the AWS infrastructure and spend, audit the development backlog, shadow one investor or board conversation if relevant.
Architecture document + decision matrix (Week 2)
30-40 page investor-grade system architecture document covering data flow, service boundaries, scalability ceilings, security posture, compliance roadmap, observability strategy, AWS cost model, and explicit build-vs-buy recommendations.