Talent badge filter
Skills filter
Select talent location
Select talent time zones
$60/hr
100%
Job Success
$400K+ earned
Available now
Offers consultations
Start of list.
End of list.
112 projects, 100% success rate. I don't take on work I'm not confident I can deliver.
I help founders and teams turn an idea (or a half-working prototype) into a production SaaS or EdTech platform that actually ships and gets used — not just demoed. Most of what I build sits at the intersection of full-stack web development and AI: RAG systems, AI agents, chatbots, voice apps. But the AI is only there when it earns its place — if a plain database query is the right answer, that's what you get.
Projects I'm proud of:
💡 An adaptive SAT/ACT preparationplatform built with React, Node.js, and Python, powered by the OpenAI API and developed with input from Stanford PhDs — it turns raw practice scores into a learning path that adjusts after every session.
💡A RAG-powered document search tool, built with Python and LangChain and connected straight into SharePoint and Dynamics 365, that indexed 300,000+ internal files and cut research time by 75%.
💡A HIPAA-compliant AI note-taking tool, built with Node.js and Whisper on a secure cloud backend, that turns a psychiatrist's spoken session straight into a structured clinical note — saving hours of their paperwork time daily.
💡A voice-controlled drive-thru ordering system, built with React Native and Node.js, now running in real locations and cutting order processing time by 30%.
💡A GDPR-first Zendesk AI copilot, built with Node.js and the OpenAI API with a custom data-scrubbing pipeline, that drafts agent replies from ticket history while stripping sensitive customer data before it ever touches the AI model.
How I work with clients
I'm direct and to the point — you'll get plain answers on scope, cost, and timeline, and if something in your plan won't work, I'll say so early, not after the invoice. I think about your project with a business mindset first: what needs to ship, what it needs to earn or save you, and what can wait — not just what's technically fun to build. No jargon dumps, no vague "it's in progress" updates.
Full Stack Development Across Every Stack
As a Full Stack Developer Python and Python Full Stack Developer, I build AI backends with Django, FastAPI, and Flask alongside React frontends. As a Full Stack Developer React and Full Stack Developer React Node, my default stack for new SaaS builds is React/Next.js + Node.js and TypeScript. As a Full Stack Developer AI, I fold LLM and RAG features directly into that same codebase instead of bolting them on as a separate service — working with OpenAI, Anthropic Claude, Gemini, Mistral, and Llama models, orchestrated through LangChain, with vector databases like Pinecone and Elastic Search grounding responses in real data instead of guesses. Where a project needs voice, I bring in Whisper, ElevenLabs, and VAPI for speech-to-text and real-time voice AI, and I build autonomous AI agents and multi-step workflows using tools like Hugging Face and PyTorch when custom model work is called for.
For projects on a different foundation, I work as a Full Stack developer PHP and Full Stack Developer Laravel on legacy systems or client-mandated stacks, and as a WordPress Full Stack developer when a CMS site needs custom functionality beyond themes and plugins. I've also worked as a Webflow developer for fast, no-CMS-overhead marketing sites and landing pages.
Whether you need a Full Stack Web Developer for a browser-first product or a Full Stack app developer for something React Native-based on mobile (with Swift and Kotlin where a fully native module is needed), I own the project front-to-back — design, build, ship, and support. On the data and infrastructure side, I work with PostgreSQL, MongoDB, MySQL, and Supabase, deploy on AWS, Microsoft Azure, and Google Cloud Platform, and build with compliance in mind from day one — HIPAA, GDPR, SOC 2, and PCI-DSS — for HealthTech, EdTech, and enterprise SaaS clients who can't afford to get that part wrong.
If your project needs someone who'll own it end to end, send over what you've got — idea, spec, or prototype — and let's see if we're a fit.
Slavik C.
has worked
.
Associated with
Pragmatic
$1M+
earned
$100/hr
100%
Job Success
$400K+ earned
Available now
Start of list.
End of list.
💎 AWS Certified - Verified by Upwork
💎 Google Certified - Verified by Upwork
💎 Microsoft Certified - Verified by Upwork
I am a seasoned Project / Tech Manager with a deep specialization in Machine Learning and Blockchain technologies. With a strong background in managing complex, cross-functional projects and a passion for leveraging cutting-edge technologies, I am committed to driving innovation and excellence in every endeavor.
As my career progressed, I specialized in Machine Learning. I worked on numerous projects that involved developing predictive models, natural language processing systems, and computer vision applications. My approach always integrates the wisdom of our ancestors with the analytical rigor required in this field. One notable project involved creating a predictive maintenance system for a manufacturing client, which reduced downtime by 40% and saved significant operational costs.
Simultaneously, I ventured into the world of Blockchain. The principles of decentralization and trustless transactions align closely with Native American communal values. I led the development of a Blockchain-based supply chain solution that enhanced transparency and traceability for a major logistics company. This project not only streamlined operations but also instilled greater trust among stakeholders.
💎 Main Skills:
✔ Project Management: Agile, Scrum, Kanban, Waterfall, Jira, Asana, Trello, Slack
✔ Machine Learning: Python TensorFlow, Data preprocessing, Model Deployment, DeepSeek, Chatgpt
✔ Blockchain: Smart contracts, Solidity, Rust, Ethereum (ERC-20, ERC-721, ERC-1155, etc), Hyperledger, Decentralized applications (DApps), Mev Bot, C++
✔ Data Analysis: SQL, Pandas, Data Visualization
✔ Communication: Stakeholder management, conflict resolution, team leadership, client relations
✔ Quality Assurance: Risk management, performance monitoring, continuous improvement
Shivam P.
has worked
.
$60/hr
100%
Job Success
$100K+ earned
Available now
Start of list.
End of list.
✨ Expert-Vetted Senior iOS Engineer by Upwork | Honored to be among the Top 1% of Global iOS Talent. I am a Product-Minded Engineer with over a decade of system development expertise, specializing in High-Fidelity Native iOS since 2016. My career is defined by high-standard iOS app execution—notably independently architecting the iOS Home & Lock Screen Widgets for Edison Mail (4.5+ stars), which earned a prestigious App Store Editorial Feature. 🚀
🏗️ My Engineering Standards:
• 💎 Pixel-Perfect Craftsmanship: I treat Figma designs as a baseline for excellence. I specialize in building fluid, state-driven interfaces with custom animations, haptic feedback, and complex gesture systems—ensuring every interaction feels premium.
• 🤖 AI-Native Development: I leverage modern AI orchestration (MCP, Cursor Rules) to accelerate development cycles while maintaining high code quality. I build systems that are architected to be AI-ready from the ground up.
• ⚙️ Scalable System Design: With a strong foundation in large-scale engineering, I prioritize Modern Concurrency (Actors/Task Groups), memory optimization (Instruments), and modular architecture to ensure long-term maintainability.
• 🛠️ Full-Stack Perspective: Beyond Native iOS, I am proficient in architecting the entire data lifecycle—from Supabase/Postgres schema design to complex backend integration. I bridge the gap between high-performance data logic and seamless mobile UX.
💬 What Clients Say:
• "Jun delivered solid work and went the extra mile for the UX. I enjoyed working with him for his communication and strong work ethics." — Taining L.
• "Reliable, pleasant to work with, and always committed to the high-standard delivery of our mobile application." — Nicolas R.
Ready to build something world-class? Whether you need a lead developer for a 0-to-1 venture or an expert to refactor legacy views into high-performance SwiftUI, I provide the engineering depth your product deserves.
Jun G.
has worked
.
$75/hr
100%
Job Success
$70K+ earned
Offers consultations
Start of list.
End of list.
Helping Startups & Enterprises Build Reliable, AI-Enabled Systems
I help companies overcome unstable systems, integration bottlenecks, and production bottlenecks - turning fragile codebases into scalable, reliable, and production-ready platforms.
With 15+ years of experience in backend architecture, mobile apps, AI integration, and cloud deployment (AWS, Azure, GCP), I specialize in solving complex technical challenges that slow down growth or increase operational risk.
My expertise includes:
• AI & ML Integration: Structured prompt design, LLM evaluation loops, JSON outputs, and automation workflows
• Backend Architecture & Microservices: Scalable, maintainable systems for web and mobile applications
• Payments & Cloud Systems: Stripe integration, secure cloud deployment, CI/CD pipelines
Recent results:
• Reduced AI output variance and improved reliability across thousands of records for an enterprise client
• Delivered microservices for a federal healthcare platform, improving notification delivery speed and system stability
• Built production-ready payment and e-commerce systems, cutting manual processing by 80%
If you need to stabilize a system, integrate AI into your workflow, or build a high-quality backend platform, I can help you do it efficiently and reliably.
AI & Automation: Prompt Engineering, LLMs (GPT-4/5), NLP, Structured Output, Evaluation Loops, LangChain
Backend & Web: Java, Python, Spring Boot, FastAPI, REST APIs, Microservices
Mobile: iOS Apps (Swift)
Databases: MySQL, PostgreSQL, Oracle
Cloud & DevOps: AWS, Azure, GCP, CI/CD (GitHub Actions)
Payments & APIs: Stripe, OAuth, Postman, Swagger
Featured Projects:
AI Evaluation Loop Platform
Designed structured prompts and evaluation workflows for LLMs, improving model consistency and reliability across thousands of records.
Impact: Reduced output variance and improved accuracy.
Government Healthcare Microservice Platform
Developed backend microservices for federal healthcare notifications.
Impact: Improved delivery speed, reliability, and employee communication.
Startup Fitness App (iOS)
Built a mobile app capturing user data and integrated AWS cloud storage.
Impact: Enhanced user experience and retention through seamless cloud integration.
Baked Goods E-Commerce Platform
Developed backend microservices with Stripe payments and admin dashboards.
Impact: Reduced manual order processing by 80%, improving operational efficiency.
Why Hire Me:
Strategic Problem-Solver: I don’t just code — I solve technical challenges aligned with your business goals.
Senior Expertise: 15+ years building scalable, production-ready systems.
AI + Engineering: Integrating AI into workflows for consistent, reliable results.
Reliable Communication: Clear, proactive updates and milestone tracking.
Call-to-Action:
Let’s discuss your project and explore how I can help you scale your system, integrate AI, or stabilize complex applications. High-impact, production-ready solutions start here.
Carprece R.
has worked
.
Associated with
Siver Solutions LLC
United States
$125/hr
94%
Job Success
$800K+ earned
Offers consultations
Start of list.
End of list.
I am a senior full stack developer with experience in all the technical areas you need.
I have extensive experience in:
1. AI development, Chatgpt, LLM
2. Complex websites and webapps
3. Mobile app development (iOS, Android)
4. Software as a Service (SAAS) developments
5. Custom ecommerce
6. UIUX and design
On the technical side I like using Django for the backend as python is well suited for web and AI developments. Frontend I like Vue or React. For mobile apps, I like React Native or Flutter although I can also do native code.
I also have experience building and managing cloud servers for your project. My team has AWS and Azure certifications.
I will be available *after* your project is completed for continued support.
Satisfaction guaranteed. I'm located in Southern California (PST) for easy communication.
Thomas K.
has worked
.
Associated with
Idea Maker
$200K+
earned
$95/hr
100%
Job Success
Available now
Offers consultations
Start of list.
End of list.
I am a cofounder of Create Neptune, a software and game development studio focusing on creating fun, user-focused, and beautiful apps and games for mobile (iOS / Android), web, PC, and consoles. Our developers and designers have worked on franchises like Scrabble and The Sims, and with companies like Mattel, EA, 2K Games, Estée Lauder, The New York Times, AppLovin (Lion Studios), and Boombit. I have led app development projects from the concept phase to post-launch marketing, and I am an expert in all stages of the application and game development life cycle. I am particularly attuned to the commercial side of application and game development: I was previously a hedge fund analyst focusing on the energy and power sector, and a mathematics, economics, and finance instructor.
At Create Neptune I have published dozens of mobile games, with our most successful app Paddle Clash reaching millions of users worldwide since publication in mid-2020 and maintaining a 4.9 / 5.0 globally and 4.7 / 5.0 in the US on the App Store. Aside from our published portfolio, I have concepted, prototyped, and built dozens of other 2D and 3D games for a variety of clients, from Fortune 500 mega-caps to bootstrapped startups.
I have over a decade of experience in game and app development. I typically work in Unity (C#), but I have also worked on successful native apps for iOS (Xcode, Swift) as well (Pandamonium, iOS, 4.7 / 5.0 on App Store).
I have worked on numerous apps from the concept and prototype phases to post-launch marketing, so I can be with you every step of the way in the creative process. Specifically, in addition to coding, I can provide concept and prototype work, professional-quality UI and UX, 2D and 3D artwork, and marketing services.
Lastly, I am very familiar with the post-launch app marketing process and publishing process on both the App Store and Google Play, and I would be happy to help you and your team with my experience.
I began my career in finance as a mergers and acquisitions investment banker and an energy and power analyst at a distressed debt fund, completing the largest leveraged buyout in fund history and managing a book of $1.3 bn of energy and power assets. I have also worked as a mathematics and economics instructor, designing several advanced mathematics and financial analysis courses.
My studio regularly works on cutting edge applications in Unity. Just a few examples:
• We developed Scrabble Vision (Mattel), an AR companion application for the physical Scrabble board game, in Unity
• We developed and helped design RYZ Home (IKIN), a holographic AR application, in Unity
• We developed and designed software for a private research study (Estée Lauder), using OpenCV and AR, in Unity
• We developed and designed StarStarter (Arcade Therapeutics), a digital anxiety treatment game, in Unity
• We developed and helped design Skylar's Run (Thynk), a digital ADHD treatment game, in Unity
• We developed and designed Highlandia (Highlands Community Charter), an English language learning game featuring 10 different mini-games, in Unity
Michael P.
has worked
.
Associated with
Create Neptune
$95/hr
100%
Job Success
$1M+ earned
Available now
Offers consultations
Start of list.
End of list.
𝗜𝘀 𝘆𝗼𝘂𝗿 𝗽𝗮𝘆𝗺𝗲𝗻𝘁 𝘀𝘆𝘀𝘁𝗲𝗺 𝗰𝗼𝘀𝘁𝗶𝗻𝗴 𝘆𝗼𝘂 𝗺𝗼𝗻𝗲𝘆 𝗮𝗻𝗱 𝗰𝗮𝘂𝘀𝗶𝗻𝗴 𝘀𝗹𝗲𝗲𝗽𝗹𝗲𝘀𝘀 𝗻𝗶𝗴𝗵𝘁𝘀? Let’s turn that stress into success.
With over 20 years of experience as a seasoned FinTech leader and Global CTO specializing in 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗚𝗮𝘁𝗲𝘄𝗮𝘆 𝗜𝗺𝗽𝗹𝗲𝗺𝗲𝗻𝘁𝗮𝘁𝗶𝗼𝗻, 𝗔𝗣𝗜 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻, and 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻 𝗛𝗮𝗻𝗱𝗹𝗶𝗻𝗴, a proven track record awaits you. Payment systems have been built and optimized to not only meet today's demands but also scale with your business tomorrow—delivering over 𝗨𝗦𝗗 𝟮𝟬𝗠 𝗶𝗻 𝗿𝗲𝘃𝗲𝗻𝘂𝗲 𝗳𝗼𝗿 𝟭𝟬+ 𝗰𝗼𝗺𝗽𝗮𝗻𝗶𝗲𝘀 and powering 200+ successful app launches worldwide.
𝗪𝗵𝗮𝘁 𝗜 𝗕𝗿𝗶𝗻𝗴 𝘁𝗼 𝘁𝗵𝗲 𝗧𝗮𝗯𝗹𝗲:
𝟭. 𝗘𝘅𝗽𝗲𝗿𝘁 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀: Mastery in integrating 𝗦𝘁𝗿𝗶𝗽𝗲, 𝗦𝘁𝗿𝗶𝗽𝗲 𝗖𝗼𝗻𝗻𝗲𝗰𝘁, and other payment gateway APIs, ensuring secure, efficient, and scalable payment systems.
𝟮. 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻 & 𝗧𝗿𝗮𝗻𝘀𝗮𝗰𝘁𝗶𝗼𝗻 𝗟𝗼𝗴𝗶𝗰: Proven expertise in handling recurring payments, multi-invoice payments, partial payments, and complex scenarios like payment failures, refunds, and voiding transactions.
3. 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗟𝗲𝗮𝗱𝗲𝗿𝘀𝗵𝗶𝗽 & 𝗦𝘁𝗿𝗮𝘁𝗲𝗴𝘆: Adept at leading cross-functional teams, communicating with C-level executives, and transforming technical challenges into robust, revenue-generating solutions.
𝟰. 𝗛𝗮𝗻𝗱𝘀-𝗢𝗻 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲: Whether you’re dealing with broken software systems or planning a complete digital transformation, startups and enterprises alike have seen at least a 𝟭𝟬% 𝗶𝗺𝗽𝗿𝗼𝘃𝗲𝗺𝗲𝗻𝘁 𝗶𝗻 𝗲𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝗰𝘆 𝗮𝗻𝗱 𝗽𝗿𝗼𝗳𝗶𝘁𝗮𝗯𝗶𝗹𝗶𝘁𝘆 through these solutions.
𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗘𝘅𝗰𝗲𝗹𝗹𝗲𝗻𝗰𝗲 𝗶𝗻 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗣𝗿𝗼𝗰𝗲𝘀𝘀𝗶𝗻𝗴:
Leveraging cutting-edge payment processing protocols — 𝗣𝗖𝗜-𝗗𝗦𝗦 𝗰𝗼𝗺𝗽𝗹𝗶𝗮𝗻𝗰𝗲, 𝘁𝗼𝗸𝗲𝗻𝗶𝘇𝗮𝘁𝗶𝗼𝗻, 𝗲𝗻𝗱-𝘁𝗼-𝗲𝗻𝗱 𝗲𝗻𝗰𝗿𝘆𝗽𝘁𝗶𝗼𝗻, and 𝟯𝗗 𝗦𝗲𝗰𝘂𝗿𝗲 𝗶𝗺𝗽𝗹𝗲𝗺𝗲𝗻𝘁𝗮𝘁𝗶𝗼𝗻𝘀 — ensures sensitive data is safeguarded and fraud risks are mitigated. Expertise in configuring 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗜𝗻𝘁𝗲𝗻𝘁𝘀, 𝗦𝗲𝘁𝘂𝗽 𝗜𝗻𝘁𝗲𝗻𝘁𝘀, and utilizing 𝘄𝗲𝗯𝗵𝗼𝗼𝗸𝘀 for real-time event handling optimizes 𝗦𝗖𝗔 flows, manages decline handling and chargebacks, and ensures seamless reconciliation across multiple payment channels. A deep understanding of card network rules, risk management strategies, and automated dunning processes guarantees that payment operations remain both resilient and highly efficient.
𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 𝗶𝗻 𝗜𝗻-𝗔𝗽𝗽 𝗣𝘂𝗿𝗰𝗵𝗮𝘀𝗲 𝗛𝗮𝗻𝗱𝗹𝗶𝗻𝗴:
Extensive experience with 𝗶𝗻-𝗮𝗽𝗽 𝗽𝘂𝗿𝗰𝗵𝗮𝘀𝗲 systems on both 𝗚𝗼𝗼𝗴𝗹𝗲 𝗣𝗹𝗮𝘆 and 𝗔𝗽𝗽𝗹𝗲 𝗔𝗽𝗽 𝗦𝘁𝗼𝗿𝗲 platforms complements robust payment gateway integrations. Successfully blending these in-app purchase mechanisms with 𝗦𝘁𝗿𝗶𝗽𝗲 creates a unified payment ecosystem that supports subscriptions, one-time purchases, and cross-platform transactions. Notable projects include 𝗦𝘁𝗿𝗲𝗮𝗺𝗶𝗹𝘆 and 𝗕𝗿𝗮𝗶𝗻𝗧𝗮𝗽, where in-app purchase flows were seamlessly integrated with backend payment processing to optimize revenue and enhance user experience.
𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁𝘀:
𝟭. 𝗚𝗹𝗼𝗯𝗮𝗹 𝗜𝗺𝗽𝗮𝗰𝘁: Solutions delivered have scaled workforces and revenues — streamlining processes and reducing monthly costs dramatically (e.g., cutting costs from $𝟭𝟲𝟬,𝟬𝟬𝟬 𝘁𝗼 $𝟱𝟬,𝟬𝟬𝟬).
𝟮. 𝗥𝗲𝘀𝘂𝗹𝘁𝘀-𝗗𝗿𝗶𝘃𝗲𝗻: Engagements have doubled revenue for companies like 𝗕𝗿𝗮𝗶𝗻𝗧𝗮𝗽 and contributed to a 𝟵𝟵.𝟲% 𝗰𝗿𝗮𝘀𝗵-𝗳𝗿𝗲𝗲 𝗿𝗮𝘁𝗲, leading to over 𝟭𝟬,𝟬𝟬𝟬 𝗱𝗼𝘄𝗻𝗹𝗼𝗮𝗱𝘀 and high user ratings.
𝟯. 𝗜𝗻𝗻𝗼𝘃𝗮𝘁𝗶𝗼𝗻 & 𝗔𝗴𝗶𝗹𝗶𝘁𝘆: Continuously integrating the latest tools—from 𝗔𝗜 𝗶𝗻𝗻𝗼𝘃𝗮𝘁𝗶𝗼𝗻𝘀 like ChatGPT and DeepSeek to advanced mobile app development frameworks — ensures clients remain ahead of the curve.
𝗖𝗼𝗺𝗽𝗹𝗶𝗮𝗻𝗰𝗲 & 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆:
PCI-DSS | SOC2 | HIPAA | GDPR
𝗪𝗵𝘆 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲?
Partner with an expert who delivers tangible results, allowing you to focus on business growth. If you're ready to stop wrestling with payment integration issues and start experiencing streamlined, profitable operations, let's connect.
Book a Consultation Today.
Subodh S.
has worked
.
$60/hr
50%
Job Success
$200+ earned
Start of list.
End of list.
I’m a mobile app developer who loves creating intuitive, innovative experiences across platforms. With over 10 years of hands-on expertise in React Native, SwiftUI, and Kotlin, I enjoy turning ideas into polished, user-friendly apps, whether that’s building a smooth cross-platform product or crafting a native experience that feels right at home on iOS and Android. I’m always looking for ways to push what’s possible on mobile while keeping performance, reliability, and quality front and center.
Working in mobile development has given me the chance to collaborate with designers, product teams, and engineers to bring unique app ideas to life. From the first sketch of a feature to the final release, I love seeing something I built make a real difference in someone’s day. Whether I’m iterating on UI, tightening up app architecture, or untangling tricky bugs, I’m always up for the challenge.
When I’m not coding, I’m usually staying on top of the latest mobile trends, experimenting with new app concepts, or learning tools and patterns that improve how products are built. Mobile development is a constant learning journey, and that’s a big part of what keeps it exciting.
Whether it’s building a new app from scratch, improving an existing one, or jumping into a fast-moving team, I’m always excited to take on new projects. Let’s create some awesome mobile experiences together!
$120/hr
100%
Job Success
$200K+ earned
Available now
Offers consultations
Start of list.
End of list.
I work with founders and engineering teams that have an AI/tech product or software system they need to get into production.
Sometimes the MVP works, but the architecture will not scale. Sometimes an outsourced team has produced a lot of code without a usable product. Sometimes the system is already live, but it is unreliable, expensive or difficult to change.
I step in as a hands-on Fractional CTO or AI Systems Architect. I review what exists, decide what should be kept or replaced, build or stabilize the parts that carry the most technical risk, and help the team establish a realistic delivery process.
I have worked in software engineering and technical leadership for more than 20 years, including four years at Apple and enterprise work for Yahoo, Thomson Reuters, and Citibank. I also founded and grew a software company to 30 people and approximately $1M in annual revenue.
On Upwork, I am Expert-Vetted with 100% Job Success and more than $200K earned.
Clients usually bring me in when:
• An AI prototype or MVP needs to become a production product
• A live system is unreliable, expensive, difficult to scale, or difficult to change
• An engineering team or development vendor needs senior technical direction
• AI agents, RAG, document processing, or workflow automation need to be integrated into an existing product or business process
My recent work includes private AI infrastructure, multi-agent software-delivery workflows, a self-hosted video intelligence system, financial-data integrations, backend modernization and an AI-powered mobile product with subscriptions and generated learning content.
Typical engagements:
• Fractional CTO and technical leadership
• AI architecture and production-readiness work
• Architecture review and technical rescue
• AI workflow, Local LLMs, RAG, and document-processing systems
• Private or self-hosted AI infrastructure
• Backend, platform, CI/CD, and deployment modernization
Send me a short description of the product and where the project is stuck. I will tell you how I would approach it.
Oleksandr M.
has worked
.
$80/hr
100%
Job Success
$300K+ earned
Available now
Start of list.
End of list.
I've spent 11 years working with clients of all sizes across a lot of different industries. That breadth means I can adapt quickly to just about any app idea and pick up new domains fast.
I know the grind of building out a first MVP and I know how to jump into an existing codebase and find the path of least resistance to get it fixed. Both sides of that equation.
What I like most is looking at the long-term picture - planning different stages, thinking through feature releases, watching an app grow. Most of my best client relationships have lasted years because of that. It's good for them and honestly it represents stability for me too. That alignment tends to produce better work.
If you're looking for someone to own the mobile side of your product and stick around, send me a message.
— Quentin H.
Quentin H.
has worked
.