I am a skilled Backend Expert with extensive experience in API development, integration, and building intelligent, AI-powered solutions. I deliver complex backend systems and innovative conversational AI capabilities tailored to diverse business needs. My expertise includes: API Development & Integration: Creating and integrating RESTful, Chat, and Streaming APIs for seamless communication and enhanced functionality. Conversational AI Solutions: Leveraging Flowise and LangChain to build intelligent chatbots that integrate with backend systems and third-party APIs. GIS Data Expertise: Extracting, manipulating, and analyzing geospatial data, including OpenStreetMap integrations. Backend Architecture: Designing scalable, secure backend systems optimized for performance and growth. Technologies: Proficient in PHP and Python, using modern frameworks and libraries for robust backend development. I combine technical expertise with a collaborative approach to deliver high-quality, efficient, and reliable solutions. Whether you need custom backend development, AI-powered conversational interfaces, or advanced geospatial solutions, I’m here to help bring your vision to life. Let’s collaborate to create scalable, future-ready solutions that drive success.

Hi there, I'm Adi Nugraha 👋 A passionate Full-Stack & GIS Developer with a unique foundation in Geological Engineering. With 3 years of experience in the field as a geologist, I bring a distinct perspective to solving complex problems with technology. My journey into IT began in early 2020, and I've since become deeply engrossed in building robust applications, especially those that leverage geospatial data. Here are the technologies and tools I use to bring ideas to life (Category & Skills): Programming Languages - JavaScript, TypeScript, Python, PHP, Go, Ruby Frameworks - Node.js (Express/Hono), React.js, Next.js, Django, FastAPI, Angular.js, Nuxt.js, Rails Spatial Libraries & GIS - GDAL/OGR, Turf.js, Mapbox/Openlayers/Leaflet, PyProj, GeoPandas, Shapely, Rasterio, Fiona Databases - PostgreSQL, MySQL, MariaDB, PostGIS, SQLite, Redis, MongoDB, Firebase ML / Data Engineering - LangChain, HuggingFace, PaCMAP, Scikit-learn, pgvector, TimescaleDB DevOps & Tooling - Docker, Redis server, Nginx, Kubernetes (On learning), Ingress NGINX (On learning) Desktop & GIS Software - VS-Code, DBeaver, Q-GIS, ArcGIS Desktop I have own VPS, if you hire me you can use it as a service for developement/staging if you not have architecture on that

100+ successful projects | 10+ years of experience | ⭐️⭐️⭐️⭐️⭐️ I help startups and businesses build secure, scalable, modern web apps: internal tools, business apps, SaaS apps, API integrations, automations, and more! Why choose me: ✅ 100+ successful projects ✅ 10+ years of experience ✅ Not afraid to go in-depth and very technical ✅ Clean, maintainable, scalable code (no shortcuts) and documentation ✅ Clear communication and quick turnaround ✅ Long-term support even after the project ends ✅ I think like a product owner, not just a developer. I analyze different approaches and tradeoffs ✅ Running my own SaaS, so actively involved in the business aspects of web apps too Core skills: ✅ Backend: Python, Django, Django REST Framework, Postgres, MySQL, Sqlite, Celery, Redis, Poetry, pyenv ✅ Frontend: Javascript, React, NextJS, Tailwind, Shadcn UI, Vite, npm, yarn, pnpm ✅ Infrastructure: Cloudflare, AWS, Azure, Hetzner, Vercel, Netlify, or any VPS or provider of your choice ✅ Features: SSO, Social logins, OAuth2, JWT, SAML, SMTP email, Webhooks, Background jobs ✅ Integrations: APIs from Stripe, Razorpay, WooCommerce, Shopify, Facebook, Twitter / X, Bluesky, Google Maps, Google Tag Manager, Google Analytics, Gmail, YouTube, Firebase, Supabase, Zoho, Sandbox, Hubspot, Salesforce, Dynamics, Twilio, WhatsApp, Telegram, Slack, Lob, Maptiler, ESRI, and many more ✅ AI: Cursor, OpenAI APIs, Elevenlabs, AssemblyAI, Ollama Some notable past projects include (all as a solo dev): ✅ Hotel booking engine and management system ✅ Marketplace for cattle and livestock ✅ Internal booking management system ✅ App for hospitals to manage appointments and patients ✅ AI powered video translation and dubbing platform ✅ AI powered geospatial analysis platform ✅ Mail marketing platform ✅ SMS and WhatsApp marketing platform ✅ WhatsApp chatbots ... and many more Some client reviews (please Google my name, Pradeep CE): ⭐️⭐️⭐️⭐️⭐️ "His work on this project was exceptional and he delivered above and beyond. Very attentive to details and making things work as they should. I am looking forward to the next project!" ⭐️⭐️⭐️⭐️⭐️ "Always recommend Pradeep as he goes above and beyond with every order!" ⭐️⭐️⭐️⭐️⭐️ "One of the best experiences I have ever had working with a contractor. He went above and beyond, with incredible planning and execution followed by constant updates along the way. I vetted over 12 other options, and he stood out for many reasons!" ⭐️⭐️⭐️⭐️⭐️ "A few things: Pradeep has an extreme attention to detail that I think sets him apart from other developers on [...]. He comes across as someone who cares deeply about the work he produces and it clearly shows in his deliveries. His problem solving ability has shined in every order that we have worked on together. Glad we crossed paths." ⭐️⭐️⭐️⭐️⭐️ "Great experience working with Pradeep. He has been more than forthcoming with suggestions to improve the solution. He has great skills with Python and Django. He has been very flexible, accomodated and worked with me on the delivery. Has been upfront about his availability which helped me to work with him well. Would love to work with him again." ⭐️⭐️⭐️⭐️⭐️ "Pradeep is a fantastic freelancer who has been working with us for the past two months. He has proven himself to be a skilled and dependable web developer who can handle any task we assign him. He listens carefully to our needs and always exceeds our expectations. He is very responsive and cooperative and has a positive attitude towards his work. He has also demonstrated great problem-solving and innovation skills in dealing with some of the issues we encountered during the project. We are very impressed by Pradeep's work and we are eager to work with him again on the next phase of our project." ... and 60+ more 5-star reviews, just like these! I offer great value for money, and I deliver exceptional quality of code, and great support. Please send me a message, even if you’re not sure yet. I’m happy to discuss your idea and guide you in the right direction.

Full stack software engineer with expertise in web application development, API design, microservices, and automated pipelines using Go, Python, Django, React, TypeScript, and AWS.

I’m a Python developer focused on building automation, data-driven tools, and backend systems that are reliable and easy to maintain. I work with scripts, APIs, and data, helping founders and teams automate workflows, extract insights, and turn ideas into working systems. Typical work includes: - Python automation & scripts - FastAPI / Flask backends - Data cleaning, analysis, and reporting - PostgreSQL / MySQL database design - Internal tools and MVPs I keep things practical: clean logic, clear outputs, and no unnecessary complexity. If you’re not sure whether your task is “development” or “data,” that’s usually a good sign I can help.

Seasoned Full-Stack Developer & Open Source GIS Specialist with 17+ years designing, building, and delivering geospatial and web/mobile applications across the US, Europe, and Asia. Based in Chennai, I bring deep spatial domain knowledge and modern full-stack engineering skills to build scalable, maintainable solutions using open-source and commercial technologies. Core technical skills * UX/UI: # Figma – UI/UX Design, Prototyping, Components, Auto Layout # Adobe Photoshop – Advanced Image Editing & Visual Design # Adobe Illustrator – Branding, Vector & Logo Design # Adobe XD – UI/UX Wireframes and Prototypes # Adobe InDesign – Print & Layout Design # Adobe After Effects – Basic Motion & Animation # Canva – Social Media & Marketing Creatives * GIS & mapping: # QGIS, # GeoServer, # GeoNetwork, # GeoNode, # MapServer, # OpenLayers, # Leaflet, # GeoExt, # CartoDB, # Google Maps API, # WMS/WMTS/WFS, # GeoJSON, # KML * Databases & spatial: # PostgreSQL/PostGIS, # MySQL, # MS SQL Server, # Spatial indexing, # GeoPackage, # Shapefile * Backend & APIs: # Node.js, # Express, # PHP, # Java, # C#, # VB.NET, # RESTful APIs, # Microservices * Frontend & mobile: # Angular, # React Native, # Native Android/iOS, # JavaScript/TypeScript, # HTML5/CSS3 * DevOps & deployment: # Linux, # Docker, # CI/CD, # AWS/Azure/GCP for GIS workloads # Ngnix Key strengths * Technical leadership & architecture: led delivery of complex, production-grade systems across spatial and regulated domains * EDI & healthcare: expert in 837/834/835 workflows, enrollment APIs, HIPAA-aligned data handling * Data engineering & ETL: reliable ingestion, validation, transformation pipelines to improve throughput and data quality * Security & compliance: PHI de-identification and controls for secure analytics and regulatory adherence * Scalability & performance: PostGIS schema tuning, spatial query optimization, large-scale system design * Modernization & migration: Visual Basic 6.0 to Visual Basic .NET and desktop as well web migrations to reduce technical debt * Mobile & offline: field mapping apps with offline sync, GPS capture, reconciliation * Automation & reliability: CI/CD, automated testing, monitoring, and operational reconciliation * Cross-functional impact: mentoring, roadmap prioritization, SLA, and ops collaboration Experience highlights * Led architecture and production delivery of EDI claim-processing systems (837/834/835), including file generation, validation, and reconciliation * Built Enrollment APIs and integration layers that reduced onboarding friction and integration time * Developed production ETL pipelines for healthcare/EDI data to improve reliability and downstream throughput * Implemented PHI de-identification and compliance controls, enabling secure analytics * Architected scalable web mapping platforms (OpenLayers/Leaflet) and GeoServer publishing pipelines * Optimized PostGIS schemas and spatial queries for high-performance GIS datasets * Delivered mobile mapping solutions (React Native/native) with offline sync and GPS integration * Drove legacy modernization and established CI/CD, testing, and QA practices to accelerate releases and reduce regressions

I help SaaS and e‑commerce teams build and scale high‑performance web apps with Node.js and TypeScript. Top Rated Plus on Upwork with 7,000+ hours billed and 100% job success, I’ve delivered production systems used in real‑world environments (from interactive real estate maps to cruise cabin booking dashboards). My focus: robust backends, clean frontends, and measurable performance gains (fewer bugs, faster load times, lower cloud costs). Selected projects • Real‑estate web app with interactive map search (Angular, Node.js): built a complex, map‑based UI and optimized rendering, improving perceived performance and user engagement. • Cruise cabin booking UI (Angular, Node.js): implemented a high‑complexity interactive interface for cabin selection and booking, integrated with existing APIs. • Angular → SSR migration (Angular Universal): converted a large SPA to SSR, fixed memory leaks, and reduced Time‑to‑First‑Byte and overall resource usage. • Secure video sharing platform (Node.js, React, Vimeo API): implemented authenticated upload and streaming flows, ensuring secure access control. • Multi‑tenant auth (Auth0, RBAC, MFA): integrated Auth0 in a multi‑tenant app with granular role‑based permissions and multi‑factor authentication. • AWS cost optimization: re‑architected infrastructure and tuned resource usage, cutting monthly AWS costs by around 25%.

I'm Guillermo Quiros, a Fractional CTO and Cloud Architect with 20+ years of experience building, scaling, and leading high-performance engineering teams across the US, Europe, and New Zealand. I help founders turn ideas into fully architected, secure, scalable software products—and lead the entire execution with my engineering team. If you need a senior technology leader (not just another developer), I’m the partner you're looking for. 💡 What I Deliver as Fractional CTO Technical Leadership CTO-level strategy for startups & scale-ups Product roadmap, architecture, cost optimization Technical audits for fundraising, M&A, or due diligence Guidance for boards, investors & non-technical founders Architecture & Cloud AWS • GCP • Azure Kubernetes, Docker, Microservices Serverless, distributed systems, multi-tenant SaaS DevOps, CI/CD, observability, security SaaS & Platform Development MVP architecture + full build Modernization & replatforming Enterprise-grade backend systems Data pipelines, ML integrations, real-time dashboards Team Leadership & Delivery Build & manage engineering teams Code reviews, audits, incident response Nearshore team via my companies (CloudOps / UxxU / K8Studio) 🏢 A Full Engineering Team Available You don’t just get advice — you get execution. My team specializes in: Full-stack: React, Node, Go, Python, Java Cloud & DevOps: AWS, Kubernetes, Terraform Mobile: React Native, Flutter UI/UX and QA automation AI/LLM integrations ✔ A CTO leading your strategy ✔ A senior team implementing your roadmap ✔ Predictable delivery ✔ No hiring overhead ✔ High communication & accountability ⭐ Why Clients Hire Me 20+ years of experience from developer → CTO → CEO Led 40-person engineering organizations Built multi-million-dollar SaaS platforms Architected cloud systems across the US, Europe & APAC Founder of multiple tech companies Patented innovations (data visualization, geolocation) Fluent in English, Spanish & French ⭐ Notable Roles & Achievements CEO — CloudOps / K8Studio: Leading teams building next-gen Kubernetes and cloud-native tooling. CTO — Printdustry: Designed manufacturing cloud platform with AWS, Lambda, ECS. Chief Architect — Lobus (NYC): Designed scalable multi-tenant SaaS across Node, React, Python. VP Engineering — VizExplorer: Led 40 engineers, migrated legacy platform to microservices. Founder — Rexsystem: Built accounting/HR suite with 3,000+ customers. ⭐ Tech Stack (Expert Level) Cloud: AWS, Azure, GCP Orchestration: Kubernetes, Docker, Helm Backend: Go, Node, Python, Java, PHP Frontend: React, Angular, Next.js Mobile: React Native, Flutter Data: PostgreSQL, MongoDB, Redis, Elastic, BigQuery CI/CD: GitHub Actions, GitLab, Jenkins, ArgoCD Architecture: Microservices, Serverless, Distributed Systems AI: OpenAI/LLM integrations, automation, ML workflows ⭐ Let’s Build Something Amazing Whether you’re launching an MVP, scaling a SaaS platform, rescuing a project, or preparing for a funding round—I bring the leadership of a Fractional CTO and the execution of a top-tier engineering team. If you want a technical partner who thinks like a co-founder, not a contractor—let’s talk.

I help organizations ship AI agents, GIS platforms, and RFID/IoT systems that handle millions of transactions without breaking. Over the past 10+ years I've architected production systems for national defense agencies, government ministries, and global enterprises — environments where downtime, security gaps, and scaling failures aren't acceptable trade-offs. Selected outcomes (clients under NDA — specifics available on request after engagement): 🔹 National Navy — RFID Asset Management. Built a platform integrated with Oracle Fusion that processes 27M+ transactions across 1M+ assets globally. 99.9% uptime sustained over 6 years under defense-grade security requirements. 🔹 Major Gulf-Region Electronics Retailer — Retail Tech Stack. Delivered inventory, POS, RFID tracking, and exit-gate security as a single integrated system. 40% reduction in stock discrepancies, 60% faster checkout. 🔹 Government Interior Ministry — RTLS. Designed a Real-Time Location System with mobile apps and monitoring dashboards for secure chain-of-custody management, built to strict national security compliance standards. 🔹 World's Top-5 Ceramic Manufacturer — Industrial IoT. Built asset tracking using edge devices, cameras, and sensors across industrial operations. 70% reduction in asset search time. 🔹 B2B Security SaaS Platform — Scale & Cost Optimization. Led the technical transformation from startup to millions of concurrent users while cutting infrastructure cost by 60%. Grew the engineering team from 3 to 25+. 🔹 Enterprise AI Platforms. Delivered custom 3D GIS mapping solutions and autonomous RAG-powered chatbots integrated with secure enterprise databases — cutting manual processing time by 75% on complex workflows. Where I add the most value: AI & LLM systems — Autonomous agents, RAG pipelines, text-to-SQL over enterprise databases, LangChain, vector stores, prompt engineering, secure on-prem deployment. GIS & geospatial — 3D interactive mapping, real-time GPS tracking, routing, Mapbox GL, PostGIS, custom tile pipelines. RFID / IoT / RTLS — Real-time location systems, industrial-scale asset tracking, edge devices, sensor integration, RF signal processing. Enterprise integration — Oracle Fusion, SAP, ERP modernization, payment gateways, PCI compliance, banking APIs. Full-stack & mobile — Node.js (10+ yrs), React, Next.js, TypeScript, REST/GraphQL, React Native (iOS & Android). Cloud architecture — AWS, Azure, microservices, Kubernetes, Docker, CI/CD. Cut cloud infrastructure bills 60–70% on multiple projects without sacrificing reliability. Databases — PostgreSQL, MongoDB, MySQL, Redis, vector databases for AI workloads. Beyond the code: I founded a software consultancy and scaled it from 0 to 15+ engineers, leading distributed teams across the UAE, Jordan, Pakistan, and Australia under agile delivery. I'm equally comfortable as a hands-on architect, a fractional CTO, or a technical lead embedded inside your team for a focused build. I've also conducted technology due-diligence and risk assessments for M&A transactions. How to engage: Most engagements start with a short discovery call so I can understand the problem before quoting anything. Whether you need an AI workflow built from scratch, a GIS or RFID platform architected end-to-end, or an honest second opinion on a system that isn't scaling — message me with a few sentences about the situation and we'll go from there.

Need a backend developer who's shipped AI-powered APIs at scale? I build Node.js and Python backends - REST APIs, LLM integrations, AWS infrastructure - for SaaS startups that can't afford downtime or spaghetti code. I spent years at Careem (the Middle East's largest ride-hailing platform, acquired by Uber) fixing core trip orchestration, building real-time location streaming, and decomposing a legacy monolith into microservices with Kafka, PostGIS, and H3 indexing. That's not side-project experience - it's production systems serving millions of daily users under real traffic. I bring that same engineering discipline to every client engagement. Here's what I actually build: ⚙️ Node.js & Python APIs — NestJS, Express, FastAPI, Django. Clean architecture, versioning, validation, and Swagger docs from day one. 🤖 AI & LLM Integration — 20+ AI-powered platforms shipped using LangChain, OpenAI APIs, and custom agent workflows. RAG architectures, document pipelines, intelligent automation. ☁️ Cloud & DevOps — AWS (EC2, Lambda, S3, RDS, SQS, EventBridge, CloudWatch), CI/CD pipelines, auto-scaling, zero-downtime deployments. 🗄️ Database Design — PostgreSQL, MongoDB, MySQL, Redis, DynamoDB. Schema design, indexing, query tuning, migrations. 🔗 Third-Party Integrations — Stripe, PayPal, Twilio, OpenAI, CRMs, webhook pipelines. Auth (JWT, OAuth2), retries, error handling, edge cases. I work with US/EU timezone overlap, respond within 4–8 hours, and treat your codebase like I'll be the one maintaining it - because usually, I am. If you need a backend developer who can own an entire system, not just close tickets, send me a message and let's talk.