You will get a fullstack developer and AI SaaS platform | OpenAI API

Name: You will get a fullstack developer and AI SaaS platform | OpenAI API
Availability: InStock

Valentyn S. Valentyn S.

5.0

Top Rated

Valentyn S. Valentyn S.

5.0

Top Rated

Project details

You will get an AI SaaS platform with OpenAI API or any other AI API integration.
The functionality of this project - swap faces, generate images, create QR and others.

fullstack developer
web developer
react developer
wordpress developer
mobile app developer

Advertising, Marketing, Multifamily real estate, React, Node, Angular, ASP.NET, Flutter, Figma, Web development, SaaS development, AI consultation, UI/UX design, ChatGPT AI integration, Azure, Heroku, AWS, Google Cloud Platform (GCP), Amazon Web Services, Amazon SQS, AWS Lambda, AWS EC2, AWS RedShift, AWS Comprehend, Serverless, Docker, Docker swarm Lambda, API Gateway, AWS Glue, Step functions, AWS Batch, Elastic Beanstalk, Auto Scaling, S3, CloudFront, CloudFormation, Route53, CodeBuild, CodeDeploy, CodePipeline, SageMaker, IoT. React, Angular, Nextjs [Typescript]
Flutter, Codemagic (CI/CD)
Node, NestJs, .NET 6, 7
MongoDB, PostgreSQL (preferable), MySQL
AWS (SQS, SNS, Lambda, RDS, ECS, ECR, CloudWatch, EventBridge, VPC, Route53, EC2), IaC (infrastructure as a code - Terraform)
Docker Compose, Docker Swarm, Nginx React, Angular, Nextjs [Typescript]

AI Development Type

Model Tuning, Software Maintenance

AI Tools

PyTorch, Sonnet, TensorFlow

What's included $40,000

These options are included with the project scope.

$40,000

Delivery Time 50 days

5.0

23 reviews

100% Complete

(23)

1% Complete

(0)

1% Complete

(0)

1% Complete

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1% Complete

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UI/UX Redesign + Frontend Refactor + Supabase Fixes/Refractor for AI Voice Agent SaaS Platform

UX/UI for SaaS; Expert in Onboarding User Flow It was a pleasure working together. Valentyn is a professional with the right skills for the job, clear communication, and the dedication to deliver. Thank you.

React Front End Developer

Product manager/marketer for a small SaaS startup Valentin did a great job helping me connect with our users, launch regular interviews, set up a systematic backlog, and run daily stand-ups with the developer.

As a result, our processes became much more transparent and effective, with clear priorities based on feedback from current and future users.

I definitely recommend Valentin for projects that involve product ownership, collaboration with developers, and design work.

60 minute consultation Had a 1-hour consultation with Valentin - he was well prepared, reviewed all project materials in advance, and provided valuable insights on cloud architecture and microservices. He clearly explained the pros and cons of different approaches and helped identify potential bottlenecks. The session was efficient and informative. I plan to work with him again. Highly recommended.

About Valentyn

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Fullstack SaaS Engineer & AI Developer React NodeJS Claude RAG agents

100% Job Success

5.0 (23 reviews)

Chernivtsi, Ukraine - 10:30 am local time

I help startups and B2B SaaS companies build, ship, and scale complete web applications powered by production-grade AI.

Instead of hiring separate frontend, backend, and AI infrastructure engineers, I handle the entire product lifecycle — bridging the gap between robust, scalable full-stack architecture (NextJS, NodeJS, Python, AWS) and cutting-edge GenAI implementations (RAG pipelines, autonomous agents, and LLM orchestration).

With 10+ years in full-stack development, $200K+ earned on Upwork, and a 100% Job Success Score (Top Rated Plus), I build with an ownership mindset to ensure your MVP hits the market fast and scales smoothly.

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🌐 FULL-STACK & AI CAPABILITIES — WHAT I BUILD
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
→ Full-Stack SaaS Platforms: Complete web applications with responsive UIs, secure multi-tenant auth, and complex business logic (React, NextJS, TypeScript).
→ AI Agents & Agentic Workflows: Multi-agent systems capable of autonomous execution, tool usage, and function calling (OpenAI, Claude, Gemini).
→ Production RAG Pipelines: Enterprise semantic search utilizing vector databases (Pinecone, pgvector, Qdrant) for accurate, private data querying.
→ Robust Backends & APIs: Highly performant, clean-code REST/GraphQL APIs and microservices (NodeJS, NestJS, Python, Express).
→ Automated Business Workflows: Intelligent document processing, automated lead scoring, and custom CRM/ERP AI integrations.

INDUSTRIES I SERVE WITH AI + WEB SOLUTIONS:
- Multifamily Real Estate — Custom web software layered over Yardi, AppFolio, Entrata, ResMan, RealPage, Apartments com
- Hospitality / Hotels / Restaurants — AI booking flows, guest communication platforms, and review automation dashboards
- MarTech / AdTech — Complete web analytics suites integrated with AdTech and MarTech API, and others like Meta, Google, TikTok, Yelp, and UberEats APIs

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🏆 RESULTS FROM RECENT PROJECTS
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✔ AI Voice Agent SaaS Platform — Complete frontend UI/UX redesign + Supabase backend refactor, delivered in 90 days ($7,000 fixed price, 5.0 ★)
✔ Senior NodeJS SaaS Integration — 816 hours of self-driven backend delivery on schedule across 6 months ($32,633, 5.0 ★)
✔ AI-Powered Real Estate Onboarding — Built the web frontend and AI backend workflow that reduced onboarding drop-off and boosted conversions.
✔ Enterprise Software — Systems built by my team are used daily by Cushman & Wakefield (Fortune 500 real estate firm).

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚙️ TECH STACK
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
AI / LLM Integration:
OpenAI API, Claude API, Gemini, LangChain, RAG, Vector Databases, Prompt Engineering, Function Calling, Structured Outputs

Backend Development:
Nodejs, NestJS, Python, Expressjs, Nextjs (Server Components)

Frontend Development:
React, TypeScript, Redux, Nextjs, Material UI, Tailwind CSS

Mobile App Development:
Flutter (Cross-platform, CI/CD with Codemagic)

Cloud & DevOps:
AWS (SQS, SNS, Lambda, RDS, ECS, ECR, CloudWatch, EventBridge, VPC, Route53, EC2), Terraform (IaC), Docker, Docker Swarm, Nginx

Databases & Caching:
PostgreSQL, MongoDB, MySQL, Redis, Pinecone, Qdrant, pgvector

API & Enterprise Integrations (50+ types):
REST / GraphQL / SOAP · OAuth2 / OIDC · Webhooks · ETL Pipelines · Payload Encryption

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🏢 ENTERPRISE & THIRD-PARTY INTEGRATIONS
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Property Management Systems (PMS):
Yardi Voyager · AppFolio · Entrata · ResMan · RealPage · Apartments com

Marketing & Social Platforms:
Meta (FB/IG) · Google Suite · Twitter/X · TikTok · Yelp · UberEats

Past Enterprise Client Impact:
STIHL · Liebherr · Cushman & Wakefield

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🤝 HOW WE WORK TOGETHER
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
→ Discovery call → System architecture proposal → Milestone-based delivery
→ MVP in 6–12 weeks, production-ready scaling in 18–32 weeks
→ Available 30+ hrs/week, response time within 4–8 hours
→ Backed by a distributed team across 🇺🇦 🇵🇱 🇮🇹 🇷🇴 🇨🇦 if you need to scale resources rapidly

I prioritize long-term, high-trust partnerships over quick fixes — 29 completed projects with an average engagement of 12-24 months.

Let's jump on a call and map out what you're building.

Steps for completing your project

After purchasing the project, send requirements so Valentyn can start the project.

Delivery time starts when Valentyn receives requirements from you.

Valentyn works on your project following the steps below.

Revisions may occur after the delivery date.

Exploratory call

Review the work, release payment, and leave feedback to Valentyn.

What's included $40,000

AI SaaS platform

AI SaaS platform

Delivery Time 50 days

50 days delivery — Aug 19, 2026

Revisions may occur after this date.

Turn my project purchase into a donation to Valentyn. No work required.

Support Valentyn directly by donating the cost of this project. They won't have to deliver any work or incur any fees. See FAQs

We will waive all freelancer service fees for Valentyn when you purchase this project as a donation or for a project deliverable.

You will get a fullstack developer and AI SaaS platform | OpenAI API

Let a pro handle the details

Let a pro handle the details

Project details

AI Development Type

AI Tools

What's included $40,000

AR

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MP

MR

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About Valentyn

Fullstack SaaS Engineer & AI Developer React NodeJS Claude RAG agents

Steps for completing your project

After purchasing the project, send requirements so Valentyn can start the project.

Valentyn works on your project following the steps below.

Exploratory call

Review the work, release payment, and leave feedback to Valentyn.

What's included $40,000