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Top freelance UI Testing developers available to hire
Seasoned Web Developer and Blockchain enthusiast with a proven track record in the IT and services industry. Expertise in Research, PHP, HTML, JavaScript, and Blockchain development, including Smart Contracts. Skilled in automation, application testing, and cybersecurity analysis for web and mobile apps.
Hello, I'm a Lead Frontend Engineer with 5+ years of experience scaling React apps and leading engineering teams. My strengths are in TypeScript, Next.js, architecture, and performance. I want to mentor to share the best practices I've learned and help you solve real-world coding challenges.
I love breaking down complex problems into small, understandable pieces. I want you to leave our sessions feeling more capable than before we met, so that you can confidently move forward knowing that if you encounter a similar problem again, that you're prepared and ready to tackle it yourself.
With over 13 years of corporate experience, including 5 years working extensively with React and TypeScript, I bring a wealth of practical knowledge to our sessions. Recently, I left the corporate world to pursue my passion for developing a Crypto Video game full-time.
In my free time, I’m dedicated to helping others enter the tech industry by demystifying the often intimidating barriers it presents. My goal is to empower you to overcome any obstacles you encounter, giving you the tools and confidence to solve similar problems independently in the future.
I'm excited about the opportunity to work with you and help you achieve your goals in the tech industry.
Looking forward to our journey together!
I define the architecture. For 21 years, I've been the person CTOs and lead developers call when systems fail under load, migrations are at risk or AI integration needs to work right the first time.
With expertise in .NET, Python, Blazor, ASP.NET Core, SQL and agentic AI architecture (LLMs, reasoning engines, Semantic Kernel, LangGraph, tool-calling agents), I design systems where performance, reliability, and intelligent automation aren't optional—they're the baseline.
I deliver AI in production, not prototypes. I’ve architected and deployed AI-powered systems across financial platforms, education and exam automation, and real estate market intelligence, including enterprise-grade solutions for organizations such as The New York Times, Project Management Institute (PMI), Walmart, Merit Wealth, Namfus and BlueberryCMS.
---
**Here's where I'm most useful to you:**
- **The AI Integration Trap** — You've been asked to add AI to your existing .NET system but don't know whether to use *Semantic Kernel*, raw OpenAI APIs, or a Python sidecar. I've made that decision dozens of times. I'll make it faster and safer for you.
- **The Blazor Bottleneck** — Your Blazor app is slow, state management is tangled, and you're unsure if you chose *Server or WASM* incorrectly. I can diagnose what went wrong and map a clean path forward — often in a single session.
- **The Legacy Modernization Cliff** — You have a 10-year-old .NET system that needs AI or modern tooling but wasn't designed for it. I specialize in *incremental refactoring paths* that don't require a full rewrite and don't break what's already working.
---
**What I Do Best:**
- **Software Architecture & System Design** — scalable, maintainable systems from greenfield to enterprise
- **AI Agent Development** — production-grade agents with Semantic Kernel, LangGraph & AutoGen — *not demos*
- **Blazor & ASP.NET Core** — Server, WASM, hybrid — full-cycle development and performance tuning
- **Python & AI Automation** — RAG pipelines, workflow automation, voice AI, LLM integrations, chatbots
- **Legacy .NET Modernization** — refactoring strategy, migration paths, incremental upgrades
- **Architecture Audits** — identifying structural risk before it becomes a production incident, not after
- **Debugging Complex Systems** — when the stack trace doesn't tell the whole story
**If any of this sounds like your current situation — DM me. I respond to every message.**
I provide expert-level guidance for developers building high-scale, design-forward applications. With over a decade of professional experience in the JavaScript ecosystem, my primary expertise lies in **Frontend Frameworks and UI/UX Design**, backed by deep full-stack and DevOps proficiency.
### My Core Expertise:
* **Frontend & Design:** Expert mastery of **React, Vue, and Angular** with a focus on polished UI/UX and clean **TypeScript** architecture.
* **Backend & Data:** Robust development with **Node.js, GraphQL, REST, and Kafka**.
* **Infrastructure & DevOps:** Professional experience with **Kubernetes, AWS, Jenkins, and BuildKite**.
In addition to my engineering background, I have previously served as a **Full-Stack Mentor for Thinkful.com**, helping developers bridge the gap between learning and professional-grade production.
Whether you’re a bootcamp student or a working professional, I’ll help you navigate the complexities of the modern stack with the confidence of a 10-year veteran.
Hello
I have been working in the market for the past 10 years.
in the field of Database, SQL, Oracle, SQL Server, MySQL, NOSQL,DWH,ETL ,reporting and BI tools.
Have knowledge of multiples domain areas
such as Finance & banking ,Telecom, health care, Tax & Legal and FMCG
Do you need someone that knows the ins and outs of AI, Cloud, Software Engineering, System Scaling, and Design? I'm an experienced AI Engineer, Cloud Expert, Coder, and User Experience Researcher that has worked for JPMorgan Chase, the United Nations, American Express, AT&T, and Lockheed Martin as well as for several startups and small businesses. Additionally, I've mentored people running successful startups and working in companies like Anthropic.
Is your AI-powered MVP built on a fragile 'vibe-coded' foundation? Are you struggling to scale a prototype that was built with lightning speed but is now plagued by bugs, security holes, and technical debt?
I transform brittle AI prototypes into robust, **production-ready applications**. As a senior AI engineer specializing in the **Node.js** and **React** ecosystem, I bridge the gap between rapid, AI-assisted development and the disciplined engineering required for scalable, secure software.
But robust software is only half the battle. The other half is making it *work for your business*. I design and implement **intelligent automation workflows** that connect your apps, eliminate manual tasks, and free up your team to focus on high-impact work.
Whether you need to rescue a failing project, automate a core business process, or build a scalable MVP from the ground up, I provide the expert oversight to ensure your AI initiatives deliver real, measurable value.
**My Core Services:**
* **🤖 AI Code Rescue & Remediation:** I conduct deep **AI code audits** to debug, refactor, and secure fragile codebases (especially those built with LangChain.js). I turn unmaintainable prototypes into stable, scalable assets ready for real users.
* **⚙️ Intelligent Workflow Automation & Integration:** I design and build digital assembly lines for your business. I offer a full spectrum of automation solutions:
* **Rapid Integration:** Using **Zapier, Make.com & n8n** to connect your existing tools and solve immediate process bottlenecks.
* **Custom API Development:** Building custom **Node.js** APIs and webhooks to connect proprietary systems or handle complex logic that no-code tools can't.
* **AI-Powered Decisions:** Infusing your workflows with intelligence using the **OpenAI API** to triage support tickets, qualify sales leads, or generate content automatically.
* **🚀 Custom AI Solution Development:** I architect and build bespoke AI solutions from scratch, from **Custom GPTs** and intelligent **AI Agents** to complex RAG (Retrieval-Augmented Generation) pipelines that leverage your private data.
* **👨🏫 AI Engineer & Career Mentorship:** I provide 1-on-1 coaching to help developers navigate the AI landscape, master tools like LangChain.js, and build a successful career in AI engineering and automation.
**My Tech Stack:**
* **Languages:** Node.js, TypeScript, JavaScript
* **Frameworks:** React, Next.js, Express.js, NestJS
* **AI / LLM:** LangChain.js, OpenAI API, LlamaIndex, Vector Databases (Pinecone, Qdrant)
* **Automation Platforms:** Zapier, Make.com, n8n
Ready to move past the prototype phase and build a real business? **Send me a message with your project details or book a session to get started.**
---
### Service Packages
* **Package 1: AI Code Audit & Production-Ready Roadmap**
* **Description:** Have an AI-generated MVP that feels unstable? I'll perform a comprehensive review of your codebase. You'll receive a detailed report identifying security vulnerabilities, performance bottlenecks, and a concrete, actionable roadmap to make your application **production-ready**. This is the perfect first step to de-risk your project.
* **Package 2: Intelligent Automation Workflow**
* **Description:** Let's put a core business process on autopilot. We'll map out a high-impact workflow and I'll build a robust automation to solve it. Ideal for **automating lead qualification**, **triaging customer support tickets**, or **streamlining content pipelines** using the best tool for the job—Zapier, Make, or custom Node.js scripts.
* **Package 3: Scalable AI MVP Development**
* **Description:** Need to build an MVP the *right* way? I'll architect and develop a **scalable MVP** from day one, using professional, spec-driven development practices. We'll build a strong foundation with clean, documented code and a modern stack (Node.js, React) to avoid the technical debt that plagues "vibe-coded" projects.
Product-minded **CTO / Senior Full-Stack Engineer** who ships web + mobile applications fast (**prototype → MVP → production**) and builds the durable AI + workflow systems behind them. Strong across **UI/UX execution** (interaction-driven UIs, internal tooling, fast iteration loops) and **Backend/AI infrastructure** (Python, TypeScript, OpenSearch, PostgreSQL, workflow orchestration). Designed **end-to-end architectures**, integrated external vendors, hired/interviewed engineers, and owned continuous improvement, monitoring, and reliability.
Seasoned iOS Engineer with 10+ years of experience in mobile architecture and a strong track record of contributing to high-impact features. Skilled in driving end-to-end development and performance optimization . Actively seeking a Senior Engineer or Individual Contributor role to leverage expertise in building scalable, high-quality iOS applications.
I love the idea of Rapid Application Development and have followed it through out my career as a software developer. I am an expert iOS application development with over 13 years of experience. I am highly talented and skilled in problem solving and understanding complex and large code base.
I love working with:
⭐ C++
⭐ iOS application development (iPhone, iPad, iWatch, tvOS)
⭐ JavaScript
⭐ Swift /ObjC/React Native/Flutter
⭐ SwiftUI
and PYTHON
Let me help you get unstuck in your coding project dealing with iOS , Swift, SwiftUI using Autolayout, or complex logic that you cannot understand. I am expert in all design pattern including using Combine, RXSwift, MVVM, MVC, and using CoreData.
I also am expert in C++, Javascript, React. and building iOS mobile application.
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Frequently asked questions
How long do UI Testing projects normally take?
The length of a project depends on many factors, including the scope of your project and the technical complexity of it. When you post a freelance UI Testing project request on Codementor, you’ll have the option to indicate when you’d expect the project to be completed. We suggest chatting with the interested developers to ensure both sides are on the same page. For more information on how to post a freelance UI Testing request on Codementor, check out our article.
How much does it cost to hire a freelance UI Testing developer?
We don’t charge anything when you post a freelance hiring request for UI Testing developers! You’ll have the chance to determine what the budget for your project is when you post the request. You’ll only need to pay the developer if you’re 100% satisfied with their work. Please know that Codementor charges a small service fee when a developer completes the job.
What makes Codementor UI Testing developers different?
We do a comprehensive technical and communications screen of all UI Testing developers at Codementor. Our network includes book authors, popular open source contributors, top Stack Overflow users and engineers at top tech companies. In addition, to continually ensure the quality of our freelancers, we regularly check in on existing UI Testing developers’ user satisfaction rates.
What happens if I’m not happy with the freelancer’s work?
As a platform, we strive to ensure you’re always happy with your UI Testing project’s results. If you’re unsatisfied with the results, you can choose to get a refund for the project. Additionally, you can contact our support team should you need any further assistance with your project.
For more answers to frequently asked questions, see here.