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Top freelance MEAN Stack developers available to hire
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.
I am a seasoned an engineering leader and platform architect who views coding as both a craft and a creative outlet. My passion for product thinking and emerging technologies drives me to continuously explore innovative tech stacks, fueling my curiosity and commitment to learning. Over the years, I have designed and built platforms from the ground up—scaling them to serve millions of users.
My expertise range from building {𝐦𝐨𝐛𝐢𝐥𝐞 𝐚𝐩𝐩𝐬} to {𝗺𝗶𝗰𝗿𝗼-𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀, 𝐝𝐚𝐭𝐚 𝐞𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠, 𝐚𝐧𝐚𝐥𝐲𝐭𝐢𝐜𝐬 & Gen AI Pipelines}.
Developed product at scale leveraging below stacks/framework:
💻 Full-Stack Frameworks
• MEAN (MongoDB, Express, Angular, Node.js)
• MERN (MongoDB, Express, React, Node.js)
🌐 Web Frameworks
• FastAPI
• Pyramid
• Django
• Fastify
• Hono (for modern TypeScript/JavaScript edge apps)
📊 Big Data & Streaming
• Apache Kafka
• Apache Samza
• Apache Spark
• AWS Kinesis
• ELK Stack (Elasticsearch, Logstash, Kibana)
☁️ Cloud & Serverless
• Serverless Framework (AWS Lambda, Google Cloud Functions)
• Supabase
• Firebase
🗄️ Databases
• MongoDB
• Couchbase
• PostgreSQL
• MySQL
• AWS RDS
📱 Mobile Development
• Flutter (Android & iOS)
• React Native (Android & iOS)
🔐 Authorization & Policy Engines
• Open Policy Agent (OPA)
• OpenFGA
🧠 AI & Generative Tech
• Generative AI (Gen AI)
• Retrieval-Augmented Generation (RAGs)
• AI Agents
• Prompt Engineering
🧬 Vector Databases
• Weaviate
• Chroma DB
• Supabase (pgvector)
🛠️ AI Frameworks & Orchestration
• LangChain
• LlamaIndex
• CrewAI
• Haystack
***If you’re stuck with architecture decisions, scaling issues, or modern Node/Next.js challenges, I can help you move forward quickly and confidently.***
I’m a Senior Full-Stack Engineer with 17+ years of professional experience, helping startups, founders, and engineering teams design, build, and scale reliable web applications.
I’ve delivered production-grade systems including e-commerce platforms, SaaS products, content management systems, real-time dashboards, and internal tooling. My recent work focuses heavily on NestJS backends, Next.js applications, and AI-driven automation using n8n.
I’ve worked across healthcare, quick commerce, and service-based platforms, often stepping in to:
- Review and improve existing architectures
- Fix performance and scalability bottlenecks
- Guide teams on best practices and clean code
- Help founders make the right technical decisions early
I communicate clearly, ask the right questions, and focus on practical solutions—not overengineering.
## Core Technical Expertise
**Languages**:
JavaScript, TypeScript, Python, PHP, Java
**Backend & APIs**:
Node.js, NestJS, Express.js, Django, Spring Boot, Laravel
REST APIs, Event-driven systems, Background jobs
**Frontend & Full-Stack**:
Next.js, React.js, Angular, Vue.js
SEO-friendly apps, dashboards, and admin panels
**Databases & Messaging**:
MongoDB, PostgreSQL, MySQL, DynamoDB
RabbitMQ, Apache Kafka
**AI & Automation**:
n8n, AI bots, workflow automation, third-party API integrations
**CMS & E-commerce**:
WordPress, Drupal, Magento
Custom plugins, performance tuning, security hardening
**Cloud & DevOps**:
AWS, DigitalOcean, Linode
CI/CD pipelines, deployments, scaling strategies
## How I Can Help on CodeMentor
🧠 Architecture reviews (NestJS / Next.js / SaaS)
🛠️ Debugging complex backend or async issues
🚀 Performance & scalability improvements
🤖 AI & automation workflows using n8n
📈 Guidance for startups & small teams
🧑🏫 Mentorship for mid-to-senior developers
## Reasons to Choose Me
17+ years of real-world engineering experience
Clear, honest, and structured communication
Strong grasp of system design & trade-offs
Reliable delivery with professional discipline
Focused on long-term, maintainable solutions
* Experienced full-stack web developer with a strong passion for JavaScript ecosystem. I really love React, Node.js, Selenium and Material UI.
* Over 12+ years of expertise in UI web development, proficient in utilizing modern web technologies and best practices. Extensive expertise in the development of Single-Page Applications (SPAs), with a focus on providing a validated, certified high quality UI and an optimal UX.
* Have driven from ground up large-scale SaaS solutions for the Energy & Semiconductor industry by personally managing and mentoring a team of 10+ software engineers. Skilled in writing clean, reusable & testable code using latest software design principles with personal emphasis on JS / TypeScript (React, Node.js).
* Focused on improvement initiatives aimed at enhancing the ecacy of QA activities and elevating the standards of products and services.
* Known for building bridges between stakeholders and customer requirements through smart planning and innovative thinking, leveraging KPIs, regulations, and quality standards. Demonstrated an exceptional strength for comprehending a broad range of engineering skills, enabling me to successfully identify and resolve issues across the entire project life cycle.
Hey there! I'm Scott Engemann and I'm so glad you're taking some time to learn more about me!
From a young age I've always been fascinated by building things with legos (that may or may not be true to this day). Having a thought in your head and being able to bring that idea out into the physical world still excites me. I've found that front-end web development was the perfect way to express this love that I have. Over the years of experience and witnessing the evolution of the web, I have grown with a more sophisticated desire to bring the best experience to users.
To paraphrase Liam Neeson from the movie "Taken" - "I obtained a very particular set of skills, skills I have acquired over a very long career. Skills that make me a dream for people like you to work with."
- Angular: I have worked with every version of Angular from the glory days of AngularJS (think of this as version 1) all the way to the latest release at this time of Angular 19
- MEAN Stack Development: I love that I'm able to develop both front-end and back-end systems to create web applications. MEAN stack has really helped me venture into writing RESTful APIs
- Data Visualization: With the help of HighCharts, I discovered that DATA IS BEAUTIFUL... Or at least, it can be. It's astonishing to see something as simple a numbers be translated into eye-pleasing charts and elegant graphs to better explain the meaning of the 1's and 0's.
Energetic software engineer with 12+ years experience developing robust code for high-volume
businesses. Prolific, full stack developer with a passion for metrics and beating former "best-yets."
Prototyped 25 new product features per year for Elegant Inc. Increased code-efficiency of
Versatile Solutions customer portal by 55%. Boosted customer retention by 25%. Spearheaded a
team that won the 2016 Talent Award for cloud computing. An enthusiastic team player and deep creative thinker.
At Oz Online, slashed costs by 32% in 6 months by implementing Tools and Processes training across all departments. Cut stockroom waste by 65% with a new Kanban system. Skilled in Continuous Improvement, Agile & Scrum Implementation and Business Process Improvement.
Met 150% of revenue goal in fast-paced tech firm. Led 9 cross-functional teams to 25% efficiency improvement and $1.2M cost savings.
I believe that every problem has a definite solution if one takes the time to understand the problem. I apply this philosophy in my everyday life especially in the code I write.
**Passionate software developer and a debugger**. Been in this IT industry for a decade now. Have had experience in various tech stacks. Mentored more than **200 + developers** here and the count goes on. Message me with your problem anytime and i try my best to revert with your solution.
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STEP 3
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Frequently asked questions
How long do MEAN Stack 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 MEAN Stack 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 MEAN Stack request on Codementor, check out our article.
How much does it cost to hire a freelance MEAN Stack developer?
We don’t charge anything when you post a freelance hiring request for MEAN Stack 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 MEAN Stack developers different?
We do a comprehensive technical and communications screen of all MEAN Stack 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 MEAN Stack 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 MEAN Stack 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.