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When a client comes to me, they're not just looking for someone who can write code, They want a developer who understands what they're building and why. I work across the full stack, from architecting MongoDB schemas and Node.js APIs to building fast, production-ready React and Next.js frontends. On the cloud side, I handle AWS deployments, serverless functions, and infrastructure that scales without surprises. Most of my projects fall into one of a few patterns: SaaS platforms that need solid multi-tenant architecture, web apps where performance and SEO both matter (Next.js is my default choice here), backend systems where REST or GraphQL APIs connect to third-party services, and Python-based automation or data pipelines that save clients hours of manual work every week. My stack in practice: React with TypeScript, Next.js 14/15 App Router, Node.js with Express or NestJS, MongoDB with Mongoose, Python for automation and scripting, AWS (EC2, S3, Lambda, CloudFront, RDS), and deployment via Vercel, Docker, or CI/CD pipelines on GitHub Actions. I also integrate AI tools like OpenAI API, LangChain, vector databases into production applications when the project calls for it. What I've built for past clients includes a multi-vendor marketplace with real-time inventory sync, a Next.js SaaS dashboard with Stripe billing and role-based access, REST APIs handling over 50,000 requests per day, and MongoDB aggregation pipelines replacing what used to be hours of manual reporting. I communicate clearly throughout a project. You'll get updates without having to chase them, honest pushback when something isn't the right approach, and clean, documented code that your team can maintain after the project ends. I work well with both technical founders who want to go deep on architecture, and non-technical clients who need plain-language explanations of what's happening. If your project involves React, Next.js, Node, MongoDB, Python, or AWS or some combination of all of them I'd like to hear about it.

Get $100 AWS Credit + a complimentary, No-Strings-Attached AWS Cloud Assessment. ⭐⭐⭐⭐⭐ "Rarely have I worked with someone as skilled and thorough as Carlos is. Setting up my team on git, configuring our AWS servers to be safe, scalable, and fast, working with my developers to optimize code, being a good person". James Rector, UPWORK 100+ 5-star projects, I'm one of highest-rated and highest-earning AWS freelancer on UPWORK. I have been helping SaaS businesses to build scalable, secure, highly available and high-performing environments on AWS following DevOps/Dev Ops best practices. Here is what I can help you with: ✅ Review of your AWS current architecture performance, security and costs ✅ Architecture of new AWS infrastructure and Data Pipelines ✅ Migrations to AWS, AWS Cost Reduction, Database Optimisations, DevOps Engineer ✅ Managed Services SLA Problems that I solve: ⚡️ Performance At Scale: I build and deploy industry-tested and proven infrastructure code that ensures your application runs and performs fast without compromising security. ⚡️ Cost Optimisation: My infrastructure architecture enables the efficient use of resources and can help you save up to 90% in your AWS costs ⚡️ Security & Compliance: I can help you Scale and innovate quicker while building a solid foundation that will help you maintain a secure, compliant environment. ⚡️ Training & DevOps. I can help you increase your team's technology adoption while automating your DevOps/ Dev Ops processes. Technologies that I adopt and I'm an expert at: ➡️. AWS services such as s EC2, ECS, EKS (Kubernetes), S3, RDS, Step Functions, Lambda, AWS Gateway API, DynamoDB, Beanstalk, Elasticache, SNS, SES, IAM, ControlTower, WAF, Shield, Cloudformation, Cloudfront, CloudWatch, VPC, Route 53, Certificate Manager and others. ➡️. Supporting services such as CDK, Terraform, Rancher, ISTIO, Prometheus, Grafana, Teleport, Papertrail, Graylog, New Relic, Dynatrace, DataDog, Kafka, NEO4J and Spot.io. ➡️. Strong CI/CD DevOps engineering using GitHub/BitBucket Pipelines, CircleCI, ARGOCD. Industries: - FinTech - Media - Ecomm - and more! Here are some of the case studies of the clients I have helped with: 1. MONETRACK - Deploying a client stack in minutes on AWS instead of weeks Industry: Finance Problem: An unreliable process that caused constant frustration and delays. Process: Each deployment would take days to weeks to be set up, requiring between 5-6 people. Results: They now deploy a client stack in minutes instead of weeks using AWS EKS and a customised CI/CD process. In addition, I have: · Improved deployment time from weeks to minutes. · 80% reduction in costs per deployment. · Secure alignment with their client's compliance requirements. 2. Tourism Media - Great flexibility, deploying applications faster and secure on AWS Industry: Media Problem: With no CI/CD integration across all deploys, the job to integrate each stack was inconsistent and pruned to errors. Process: Deployment was not consistent across the board; they were also not resource-friendly Result: They can now push out a consistent deployment process across the company while being quickly adopted by their teams. In addition, I also have: · Improved deployment time by 60% · 70% costs reduction in EC2 instances · Greater scalability and reliability than their Legacy infrastructure. 3. Value-Ad - Scale 10X more on AWS with great stability and without the extra cost. Industry: Finance Problem: An infrastructure that could not scale securely and effectively was harming their client base. Solution: Deploy a new AWS EKS (Kubernetes) environment that is scalable, highly available, secure (PCI-DSS compliant) and cost optimised using AWS Well Architect Framework best practices. Result: They can now handle 10X more requests with excellent stability and without extra cost than their legacy infrastructure. In addition, I have added: · Greater scalability and reliability · Deployments are simplified and done in minutes instead of hours · 32% cheaper than its previous infrastructure Now a bit of myself: I'm a passionate professional with 25 years of experience in enabling business strategies through the practical application of technology architecture principles, practices, and tools. User-centric and solution-oriented, I have managed projects and teams across Australia, New Zealand, the USA, Brazil, the UK, Ukraine, Singapore, Vietnam and India over the past 14 years. A problem-solver in a broad range of technology stacks covering Architecture, Development, Integration, Data, Infrastructure, and Support. Seamless configuration and migration include fast deployment of critical and complex workloads on the cloud with hands-on expertise in AWS Services. Send me a message. I would love to discuss your project.

Focused on creating and delivering stable, thoroughly tested and high performance solutions from simple to super complex challenges. I have top knowledge and experience in a variety of languages and frameworks including Python, C#, VBA, Django, React and Flutter, and employ modern industry standard tools and bleeding technologies to arrive to solutions. Also focused on building great business intelligence solutions using Powerbi and SQL. I'm very reliable, work very fast and am driven to ensure you get maximum value from my services.

Over the last 15 years I have continued to develop my career, skillset, knowledge and experience. The last couple of years, upwork has introduced me to a great number of great people and projects. Two of these projects will be briefly outlined below. The first was designing and implementing a 4 million hits / day infrastructure to handle advertising banners. This client had a business requirement to greatly extend the reach of the live infrastructure. This project was completed in PHP / MySQL and is currently hosted on a cloud platform. This project scales automatically as required to handle any variation in the daily load. The final project was a hospital scheduling task. This client worked for a hospital and had over 30 different scheduling rules for every time-slot. The client used to do this manually and it took hours every week. I came up with a VBA based solution that would automate this task. On completion, the task took about 20 seconds to execute and correctly assigned all time-slots to the correct hospital resources. I would like to continue to be exposed to new and different challenges, that will further develop my skills and career. I also really enjoy making new contacts on the upwork network. I look forward to the many varied opportunities and roles that upwork offers.

With over 15 years of experience in cloud architecture, DevOps, AI solutions, and network/security management, I have supported startups and enterprises in optimizing their cloud environments and integrating cutting-edge technologies. As a former Principal Solutions Architect at AWS, I bring deep technical expertise and hands-on experience in building, managing, and scaling cloud and AI solutions across various industries. What I Offer: Cloud Architecture & DevOps: Expertise in designing and deploying scalable, highly available, and fault-tolerant systems across AWS, Azure, Google Cloud, and Oracle Cloud Infrastructure (OCI), with a primary focus on AWS. This includes serverless architectures, microservices, databases, analytics, IOT and Networking. Generative AI & Machine Learning Solutions: Design, deployment, and management of AI models, including self-managed and managed services for generative AI, OCR, computer vision, and natural language processing (NLP). Proven ability to integrate AI with existing cloud infrastructures to enhance automation, efficiency, and data analysis capabilities. System Optimization & Troubleshooting: Proven experience in optimizing cloud and AI infrastructure for cost-efficiency, reliability, performance, and security, following best practices across AWS, Azure, Google Cloud, and OCI. Multi-Cloud Migration & Integration: Skilled in lift-and-shift migrations of on-premises applications to cloud platforms, seamless data ingress and egress, and integration across multi-cloud environments. Managed Cloud & AI Services: Comprehensive managed services, covering everything from security and compliance to automation and cost optimization, ensuring seamless operations and maximum ROI for your cloud and AI infrastructure. SaaS & Automation Solutions: Currently developing a SaaS platform to provide complete visibility into IT infrastructure, enhancing operational efficiency, performance, cost optimization, and sustainability. Cloud & AI Skills: Designing and deploying scalable, highly available, and fault-tolerant systems on AWS, Azure, Google Cloud, and OCI Lift and shift of existing on-premises applications to cloud platforms Data transfer (ingress and egress) to and from cloud environments Selecting appropriate cloud and AI services based on data, compute, database, or security requirements Implementing architectural and AI best practices across multi-cloud platforms Cost optimization and control mechanisms for cloud and AI services. Certifications: AWS Certified Solutions Architect – Professional AWS Certified Network - Specialist AWS Certified DevOps Engineer - Associate AWS Certified SysOps Administrator – Associate Why Work With Me? My passion lies in being a strategic partner for businesses, guiding them through every step of their cloud and AI journey. Whether you’re looking to build from scratch, optimize existing infrastructure, or integrate advanced AI models, I’m here to help. Let’s connect and take your cloud and AI environment to the next level.

As a Fractional CTO with 18+ years of engineering leadership, I help startups and growth-stage companies architect, build, and scale mission-critical AI and software products. Founders bring me in when they need strategic technology direction - not just a developer - someone who can own the roadmap, lead teams, and ship enterprise-grade systems end-to-end. I specialize in AI-driven products, intelligent automation, and full-stack platforms built for stability, scale, and long-term ROI. 🚀 What I Deliver as Your Fractional CTO # Strategic technical roadmaps aligned with business and funding milestones # AI-powered chatbots & LLM systems that automate complex customer workflows # Production-grade full-stack platforms built for performance & scale # Engineering leadership, hiring & architecture governance 🧠 AI, LLMs & Chatbots # OpenAI (GPT-4/4o, GPT-3.5), LangChain, Rasa, Dialogflow, Watson # RAG pipelines, vector DBs, sentiment & intent detection # Custom AI assistants, agentic workflows, knowledge bots 💻 Full-Stack Engineering # Frontend: React, Vue, Next.js, TailwindCSS # Backend: Node.js, Express, Laravel, Python (FastAPI, Flask) # Databases: PostgreSQL, MySQL, MongoDB, Firebase # Cloud & DevOps: AWS, GCP, Docker, Kubernetes, CI/CD 🏬 SaaS, E-Commerce & Enterprise Systems # Custom SaaS platforms with multi-tenant architecture # AI-driven analytics, dashboards & automation tools # Shopify, WooCommerce, BigCommerce integrations 🌟 Trusted by Global Founders & Tech Leaders "Hardik built an AI chatbot that transformed our customer engagement. His technical leadership was invaluable." - John Walker, Founder, COTIQU "The AI systems Hardik developed streamlined our real-estate lead pipeline overnight." - Cameron Peters, Tech Lead, Doohken 🌍 Industry Expertise # Healthcare & Pharmaceuticals # Real Estate & PropTech # E-commerce & Retail # Logistics & Supply Chain 📌 Engagement Policy ⚠️ I only accept: # $80/hr+ hourly engagements # $5,000+ fixed-price projects Architect-level focus and measurable outcomes, every time. Ready to build something exceptional? Send an invite to discuss your roadmap.