I help startups, enterprises, and investors build scalable SaaS platforms, AI-powered applications, and high-performance FinTech systems that deliver measurable business results. With 5+ years of experience across the US, Europe, and Asia, I’ve successfully launched platforms in SaaS, trading, e-commerce, healthcare, and education, consistently turning ideas into profitable products. ✨ 𝑹𝒆𝒔𝒖𝒍𝒕𝒔 𝒀𝒐𝒖 𝑪𝒂𝒏 𝑬𝒙𝒑𝒆𝒄𝒕 • SaaS MVPs delivered in weeks, not months • Secure, multi-tenant architectures with Stripe & subscription billing • AI chatbots, RAG assistants, and multimodal agents integrated seamlessly • Real-time trading dashboards with sub-second latency • Clean, maintainable, production-ready code with full documentation 🤹‍♂️ 𝑪𝒐𝒓𝒆 𝑬𝒙𝒑𝒆𝒓𝒕𝒊𝒔𝒆 - SaaS Platforms • Multi-tenant SaaS, RBAC, subscriptions, analytics • Scalable dashboards, reporting, and workflow automation • Authentication: OAuth2, JWT, SSO, enterprise-ready security - FinTech & Trading Systems • Forex & crypto dashboards with real-time market data • Automated trading bots, copy-trading & risk management • Internal wallets, secure payments (Stripe, PayPal, crypto), reporting - AI-Powered Applications • AI chatbots & virtual assistants for sales & support • RAG pipelines for knowledge-based Q&A (PDFs, Google Drive, APIs) • AI-driven analytics, insights & personalization engines - Mobile Development • React Native & Flutter apps for iOS & Android • Push notifications, deep linking & in-app payments • Full App Store & Play Store deployment 🌟 𝑺𝒆𝒍𝒆𝒄𝒕𝒆𝒅 𝑷𝒓𝒐𝒋𝒆𝒄𝒕𝒔 • Trading Ecosystem for 20k+ Users → Built Prop Firm, AI Trading Analytics, Community & Wallet Infrastructure • Multi-Tenant SaaS MVP → Stripe billing, RBAC, admin dashboards & analytics • AI Knowledge Assistant → Chatbot pulling context from PDFs & Google Drive • Healthcare SaaS Platform → HIPAA-compliant telemedicine app with scheduling & chat • E-commerce SaaS → Automated order tracking & customer loyalty workflows 🏭 𝑰𝒏𝒅𝒖𝒔𝒕𝒓𝒊𝒆𝒔 𝑺𝒆𝒓𝒗𝒆𝒅 • FinTech & Trading – Dashboards, bots, algo-trading, payment integrations • Healthcare – Telemedicine, HIPAA-compliance, patient portals • E-commerce – Portals, loyalty tools, customer analytics • EdTech – Online tutoring platforms, student dashboards, onboarding • B2B SaaS – Role-based access, billing, workflow automation 👩‍💻 𝑻𝒆𝒄𝒉 𝑺𝒕𝒂𝒄𝒌 • Languages: JavaScript/TypeScript, Node.js, Python, HTML/CSS • Frontend: React, Next.js, Angular, Tailwind, MUI • Backend: Express, NestJS, Encore.ts, FastAPI, Django • Databases: PostgreSQL, Supabase, MongoDB, Redis • AI/ML: GPT-4/5, Claude, LangChain, RAG • Mobile: React Native, Flutter • Payments: Stripe, PayPal, Crypto • Cloud/DevOps: AWS, GCP, Vercel, Docker, Kubernetes, CI/CD 🌍 Bilingual in Spanish & English – enabling seamless collaboration with global teams across time zones. ✅ If you need a SaaS platform, AI-powered app, or FinTech solution, I’ll help you go from idea → MVP → scale with the right architecture, clean code, and scalability!!!

Full-Stack AI Engineer specializing in Next.js, FastAPI, and Agentic Workflows. I don't just build basic AI wrappers; I architect deep AI backends (RAG pipelines, multi-agent orchestration) and ship them as polished, production-ready full-stack applications. A few things I've built recently: At CompuFlair, I designed RAG pipelines over large Python codebases using ChromaDB and OpenAI embeddings, turning thousands of unstructured animation scenes into a semantically searchable knowledge base. I also built a LangChain tool that pulls from the YouTube Data API to detect content trends and auto-generate topic recommendations, which directly fed into the client's content strategy. For a client assessment, I built a multi-agent AI Visibility API : a Flask backend with three specialized agents handling query discovery, opportunity scoring, and content recommendations. Each agent runs against real SEO data, and the pipeline produces ranked, actionable output stored in PostgreSQL via SQLAlchemy. Earlier, I engineered a multimodal Instagram analyzer combining GPT vision, Whisper transcription, and context-aware comment generation deployed on AWS EC2, managing 10–15 accounts simultaneously. On the .NET side, I spent nearly two years as a backend developer at Star Healthcare Technologies, owning a full healthcare practice management system in ASP.NET Core : claims processing, billing workflows, SignalR real-time updates, Stripe payments, and background job scheduling with Hangfire across multiple enterprise clients. My background is in Physics (BSc, PIEAS), which means I'm comfortable with the math and the reasoning behind the systems I build, not just the frameworks. What I work on: LLM Applications & RAG Systems RAG pipelines with LangChain, ChromaDB, Pinecone, and pgvector, OpenAI and Anthropic API integrations, prompt engineering for structured JSON output, and multi-agent orchestration. AI Agents & Automation Agentic workflows using LangChain and LangGraph, tool-calling agents, pipeline orchestration with partial failure handling, and workflow automation via API integrations. Python Backend RESTful APIs in FastAPI and Flask, async Python, PostgreSQL, Docker, AWS EC2. .NET Backend ASP.NET Core, SignalR, Hangfire, SQL Server, Stripe API integrations — enterprise-grade systems with proper background job handling and real-time features. 100% Job Success Score. I ask the right questions upfront rather than delivering something that misses the brief. Message me with what you're building, and I'll give you a straight answer on whether I can help.

"I am a dual-degree professional combining a BSc in Computer Science (University of Nairobi) and a BA in Economics (Kenyatta University), with extensive experience in econometrics, research, and full stack development. With a 100% Job Success Score across 70+ completed projects, I consistently deliver exceptional results. 📊 Research & Econometrics: Advanced econometric modeling using R, Python, and SPSS Health economics and economic evaluation Quantitative and qualitative research Academic writing and literature reviews Scopus and peer reviewed research Data visualization using Tableau, Excel, and Python 💻 Full Stack Development: Backend development using Scala, Node.js, and PostgreSQL Frontend development using React.js and Next.js Database management using SQL Web scraping and data extraction API development and integration 🏆 Why Choose Me: 100% Job Success Score Currently working as Software Engineer at Belio Enterprises Fast response time — 0-4 hours Native English and Swahili speaker Committed to quality and exceeding expectations Let us discuss your project today!"*

"I am happy to share my experience with Victor, an outstanding freelance writer. His remarkable productivity and top-tier writing skills have consistently impressed me. Victor's ability to deliver exceptional content on time is truly commendable. If you're looking for a highly productive and skilled freelance writer, I recommend him – he consistently goes above expectations." As a dedicated data scientist and analytics professional, I bring a solid foundation in data science and hands-on experience in data-driven problem-solving and predictive analytics. I have honed my skills through extensive projects and formal training, including certifications from the Data Science Council of America and DataCamp. My technical acumen and commitment to delivering actionable insights empower me to create impactful solutions across diverse industries. I specialize in: • Data Engineering and Analytics: Experienced in building data pipelines and managing ETL workflows with Hadoop, AWS Redshift, and Google BigQuery. • Data Visualization and BI: Skilled in translating complex data into meaningful visuals with tools like Tableau, Power BI, and Looker, helping stakeholders make informed decisions. • Machine Learning & Predictive Modeling: Proficient in designing and deploying ML models, with a strong command of Python, R, and SQL. • Process Automation: Developed and deployed Power Apps to automate workflows, improving efficiency and accuracy in data reporting. • Retail and Network Analysis: Completed independent projects on recommender systems and product network analysis using R and Shiny, leveraging association rule mining and community detection for business insights. Core Technologies and Tools: • Programming Languages: Python, Java, R, Scala • Data Tools: Hadoop Ecosystem, TensorFlow, Elastic Search, Apache Spark, Kafka, MongoDB • Visualization: Tableau, Power BI, Shiny • Cloud & Database: Google Cloud Platform, AWS Redshift, SQL, BigQuery • Certifications: Associate Big Data Engineer (ABDE™), Data Science Council of America; Data Engineer, Data Scientist, and Data Analyst Associate from DataCamp With a proven data engineering, analytics, and visualization record in data engineering, analytics, and visualization, I'm excited to connect with clients seeking data solutions that drive success. Let’s discuss how I can take care of it. I'm excited to connect with clients seeking data solutions that drive success. Let’s discuss how I can bring your data strategy to the next level.

A seasoned data scientist with six years of extensive experience in leveraging data-driven insights to solve complex business problems. Proficient in Python, SQL, R, and PySpark, and well-versed in Azure MLOps, Azure DevOps, and Azure ML platforms. Demonstrated expertise in the development and implementation of time series forecasting models, image processing using OpenCV, natural language processing (NLP) techniques, operations research, and linear optimization techniques. Throughout my career, I have successfully applied advanced analytics to drive decision-making across various industries, including stock trading. I possess experience in developing and executing trading strategies that maximize profitability and minimize risk, thanks to my strong background in operations research and linear optimization. By leveraging my diverse skillset, I have consistently delivered impactful and innovative solutions that align with business goals and facilitate data-informed decision-making. As an effective communicator, I excel in collaborating with cross-functional teams, translating complex technical concepts into actionable insights, and presenting results to stakeholders. My dedication to continuous learning and improvement, along with my passion for harnessing the power of data, make me a valuable asset to any organisation seeking a skilled and experienced data scientist.

You have a bold idea, and you need to launch it quickly without sacrificing quality. I partner with founders and teams to take their idea from concept to a market-ready product using AI-enhanced workflows, clean architecture, and agile execution. I’ve worked with 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝗮𝗰𝗿𝗼𝘀𝘀 𝘁𝗵𝗲 𝗨𝗦 (𝗕𝗮𝘆 𝗔𝗿𝗲𝗮, 𝗔𝘁𝗹𝗮𝗻𝘁𝗮), 𝗘𝘂𝗿𝗼𝗽𝗲, 𝗮𝗻𝗱 𝗔𝘀𝗶𝗮 in both early (Pre-seed/Seed) and advanced (Series C/D) stages, equipping me with practical insight into TDD, CI/CD, and lean delivery strategies. ⚡ 𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸 𝗧𝗼 𝗛𝗲𝗹𝗽 𝗬𝗼𝘂 ✅ 𝗙𝗥𝗘𝗘 Requirements Session: I listen to your goals and pain points to draft actionable approaches. ✅ 𝗙𝗥𝗘𝗘 Roadmap & Budget: You receive a clear roadmap with milestones (max 2 weeks each). ✅ 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗞𝗶𝗰𝗸𝗼𝗳𝗳: We launch into building your product with best practices. ✅ 𝗧𝗿𝗮𝗻𝘀𝗽𝗮𝗿𝗲𝗻𝗰𝘆: Regular updates, Slack/Teams communication, open access. ✅ 𝗤𝘂𝗮𝗻𝘁𝗶𝗳𝗶𝗮𝗯𝗹𝗲 𝗠𝗶𝗹𝗲𝘀𝘁𝗼𝗻𝗲𝘀: Payment only upon your approval. ❗ 𝗡𝗢𝗧𝗘: 𝗬𝗼𝘂 𝗔𝗿𝗲 𝗦𝗮𝗳𝗲 🎁 𝗜 𝗼𝗳𝗳𝗲𝗿 𝗮 𝟭𝟬𝟬% 𝗥𝗲𝗳𝘂𝗻𝗱 𝗳𝗼𝗿 𝗮𝗻𝘆 𝗺𝗶𝗹𝗲𝘀𝘁𝗼𝗻𝗲 𝘁𝗵𝗮𝘁 𝗱𝗼𝗲𝘀 𝗻𝗼𝘁 𝗺𝗲𝗲𝘁 𝗲𝘅𝗽𝗲𝗰𝘁𝗲𝗱 𝗾𝘂𝗮𝗹𝗶𝘁𝘆. You only pay for what meets your standards. 🛠️ 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀 𝗜 𝗼𝗳𝗳𝗲𝗿 👉 Full stack development 👉 Web Development 👉 Mobile Development 👉 Custom Software Development 👉 AI Development / AI Integration 🛠️ 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 👉 Languages: Python, TypeScript, Ruby 👉 Frameworks: Django/DRF, Node.js, NestJS, Ruby on Rails 👉 Frontend: React, Next.js 👉 UI/UX: TailwindCSS, Mantine UI 👉 Databases: Postgres, MySQL 👉 AI Toolkit: LangChain, Langgraph, LLM integrations (GPT, Gemini, HuggingFace) 📩 𝗟𝗲𝘁’𝘀 𝗰𝗼𝗻𝗻𝗲𝗰𝘁 𝗮𝗻𝗱 𝗱𝗲𝗹𝗶𝘃𝗲𝗿 𝗮 𝗽𝗿𝗼𝗱𝘂𝗰𝘁 𝘆𝗼𝘂 𝗰𝗮𝗻 𝗯𝗲 𝗽𝗿𝗼𝘂𝗱 𝗼𝗳. 𝗕𝗼𝗼𝗸 𝗮 𝗙𝗥𝗘𝗘 𝗰𝗮𝗹𝗹 𝘁𝗼 𝗱𝗶𝘀𝗰𝘂𝘀𝘀 𝘆𝗼𝘂𝗿 𝗶𝗱𝗲𝗮 𝘁𝗼𝗱𝗮𝘆.

🌟 Looking for a reliable, detail-oriented operations professional who can handle high-volume support, coordinate across multiple teams, and keep everything moving without dropping the ball? That is exactly what I do — every single day. I am an Operations Manager with hands-on experience managing end-to-end repair order lifecycles, vendor onboarding, fleet coordination, and multi-channel customer support for a U.S.-based automotive technology platform. I support a national network of auto repair shops and Amazon delivery fleet companies across email, phone, CRM, and a proprietary operations portal — simultaneously. 💼 What I Do Every Day In my current role at ServiceUp — a vehicle repair management platform serving Amazon DSP fleets across the United States — I manage a high-volume ticket queue across multiple support channels while coordinating with repair shops, fleet managers, Amazon Program Managers, and internal teams to keep repair orders moving on time. My day-to-day covers: 📋 Repair Order Management — Tracking, following up, and resolving RO lifecycle issues from acceptance through invoicing and payment. I manage dwell-time reports, track estimated completion dates, and coordinate real-time status updates between vendors and fleet contacts. 🛠️ Vendor & Shop Support — Onboarding new repair shops, resolving portal access issues, guiding estimate submissions, and walking vendors through platform compliance — all while keeping SLA timelines on track. 🚐 Fleet & Amazon Coordination — Direct communication with Amazon Regional Fleet Managers and Program Managers on escalations, LEAP pricing requests, and Prime Day fleet recovery initiatives. I manage tracker-based outreach campaigns targeting 100+ repair orders per cycle. 📞 Inbound & Outbound Call Support — High-volume phone support including dwell chase calls, payment issue resolution, vendor onboarding calls, and escalation management. Comfortably handling frustrated vendors and fleet contacts with professionalism and calm. 📊 CRM & Ticket Management — Logging, updating, and managing tickets in HubSpot daily across multiple pipelines. I document every interaction, escalate appropriately, and maintain clean records across all open cases. 📁 SOP & Documentation — I have built and maintained our team's full Ticket Handling Guide, Master Call Script Library, and Prime Day tracker work guides — used daily by the operations team to handle 10+ ticket categories consistently. ⭐ What Clients Say About Me Organized, professional, and reliable Strong communicator across email, phone, and chat Takes initiative and works independently with zero supervision 5.0 ratings across every past Upwork engagement 🎯 I Specialize In 📋 Repair order and ticket lifecycle management 📞 Inbound and outbound phone support 📧 Email and multi-channel customer support 🤝 Vendor onboarding and relationship management 🚐 Fleet coordination and B2B account management 📊 CRM management — HubSpot, RingCentral, AppFolio 📁 SOP creation and process documentation ⚡ Escalation handling and cross-functional coordination 🎯 Operations support and administrative coordination 🔧 Tools & Platforms HubSpot | RingCentral | AppFolio | LinkedIn Sales Navigator | ServiceUp | Slack | Zoom | Google Workspace | Microsoft Office | Aircall 👉 Let us work together — send me a message and let us get started! Juvelyn Corpuz 🤝

Android, iOS, Java, .Net Development experts with extensive knowledge of US Healthcare software development and integration. Technosoft is an ISO 9001:2008 certified, IBM Advanced Business Partner, MySQL Partner & CMMI ML2 appraised, company. Healthcare Expertise Include: - HL7, FHIR, C-CDA, CCD, HIPAA, EMR, EHR, m-health, SMART on FHIR, CDS Hooks, cTakes - EPIC, Cerner, AllScripts, Kareo, Athena, Open Dental, HBOC, Siemens, Quest, EHR integration - Custom Interface, Medical Billing, Scheduling, Laboratory Integration, Athena Integration, Kareo, Redox integration Technical Expertise includes: - Python, Django, Celery Beat, Flask - iOS (Objective-C, Swift, Siri, BLE, etc) - Android - Front End Development (JQuery, Ajax, Node.js, AngularJS, ReactJS - Java/J2EE (Spring, Hibernate, JSF, Play framework, Spring Boot, Scala, etc) - .Net ASP.net, VB.net, C#, WPF, WCF, SignalR, Web Forms, Azure - Wearable Devices integration (Misfit, Fitbit, Mi-Band, etc) - Alexa/Alexa Show Skills Development - DiagFlow, Lex, Twilio, NLU, NLP, Siri, and other voice integration technologies. I am a HIMSS Certified Healthcare Security Professional and run my company Technosoft solution. We focus solely on the US healthcare market and are very well versed in HIPAA, HL7, FHIR, SMART on FHIR and other healthcare standards. We have developed video conferencing (WebRTC), EMR, prescriptions, lab orders, lab results, billing, EDI and other Healthcare Information Systems modules. We are also very well versed in fitness, wearable and biometrics devices integration. Summary: - 14+ years Healthcare IT expertise - Software solutions deployed In over one thousand US hospitals/clinics - Strong Exposure to mHealth, webRTC, HIPAA, HL7, FHIR - SEI CMMI Level 2 Appraised - Excellent Communication Skills with hundreds of completed projects. - Experts in iOS, Android, Java/J2EE, .Net, Azure development - Experienced in Agile development with Daily/Weekly SCRUM via Skype or phone availability as per your Timing. - Daily/weekly status report - References available upon request. ✅ Top-Rated - Mobile Application (iOS, iPhone, Android) Developers ✅ Top Rated - Web Application (ASP.net, Java, J2EE) Developers ✅ 5 Star Feedback ✅ 100% Job Success Score ✅ Healthcare Software Experts ✅ With Elance/Upwrok for over 17 years ✅ 10,000+ Hours clocked on Upwork with 100% Client Satisfaction

Senior Software Engineer with strong knowledge of Node.js (OOP, KISS, DRY, WET, Design and Architectural Patterns, Algorithms, Data Structures), Angular 2+ (RxJS, NgRx), React.js (17-18, Hooks, Redux, Saga ,Thunk, Styled, Effector, FSD, Next.js, Micro-Frontend) Have great experience in optimization web applications (both FE and BE) with bundle-analyzer, brotli/gzip static compression, lazy-loading, cache rules in CloudFront, ETag/Cache-Control headers, Redis caching, and compressing response from BE in gzip which can improve the speed of your application up to 3 times or more. Have a good experience with databases such as MySQL/PostgreSQL/MongoDB/DynamoDB/DocumentDB/ElasticSearch (relations, queries, triggers, views, all kinds of JOINs in RDBS, TypeORM, Sequelize, Native SQL, Knex, Mongoose). A lot of cases needed to be implemented using AMQP (Advanced Message Queuing Protocol). I always use RabbitMQ and NATS in my work and am very familiar with these technologies. One of the cases - is the implementation of product importer for an international e-commerce company from advertising to ElasticSearch using AMQP. I have a good understanding of microservice architecture (Docker, Kubernetes, AMQP, Ingress, Skaffold, or identical AWS technologies), which also uses AMQP as the main way to communicate between services. I am also good at Test-Driven-Development, and Behaviour-Driven-Development methodologies and I really prefer high-quality software. Also familiar with AWS EC2, Security Groups, ElasticBeanstalk, Route53, Elastic Kubernetes Service, Ingress, Lambda, CloudFront, S3, RDS, and CloudWatch. Took part in the development process of E-Commerce, Volunteer, Education, WebScrapping, Trading systems, and applications.

— TOP RATED PLUS Freelancer on UPWORK — EXPERT VETTED Freelancer (Among the Top 1% of Upwork Freelancers) — Full Stack Engineer — Data Engineer ✅ AWS Infrastructure, DevOps, AWS Architect, AWS Services (EC2, ECS, Fargate, S3, Lambda, DynamoDB, RDS, Elastic Beanstalk, AWS CDK, AWS Cloudformation etc.), Serverless application development, AWS Glue, AWS EMR Frontend Development: ✅ HTML, CSS, Bootstrap, Javascript, React, Angular Backend Development: ✅ JAVA, Spring Boot, Hibernate, JPA, Microservices, Express.js, Node.js Content Management: ✅ Wordpress, WIX, Squarespace Big Data: ✅ Apache Spark, ETL, Big data, MapReduce, Scala, HDFS, Hive, Apache NiFi Database: ✅ MySQL, Oracle, SQL Server, DynamoDB Build/Deploy: ✅ Maven, Gradle, Git, SVN, Jenkins, Quickbuild, Ansible, AWS Codepipeline, CircleCI As a highly skilled and experienced Lead Software Engineer, I bring a wealth of knowledge and expertise in the areas of Java, Spring, Spring Boot, Big Data, MapReduce, Spark, React, Graphics Design, Logo Design, Email Signatures, Flyers, Web Development (HTML, CSS, Bootstrap, JavaScript & frameworks, PHP, Laravel), responsive web page development, Wordpress and designing, and testing. With over 11 years of experience in the field, I have a deep understanding of Java, Spring Boot, and Microservices, as well as Java EE technologies such as JSP, JSF, Servlet, EJB, JMS, JDBC, and JPA. I am also well-versed in Spring technologies including MVC, IoC, security, boot, data, and transaction. I possess expertise in web services, including REST and SOAP, and am proficient in various web development frameworks such as WordPress, PHP, Laravel, and CodeIgniter. Additionally, I am highly skilled in Javascript, jQuery, ReactJs, AngularJs, Vue.Js, and Node. C#, ASP.NET MVC In the field of big data, I have experience working with MapReduce, Spark, Scala, HDFS, Hive, and Apache NiFi. I am also well-versed in cloud technologies such as PCF, Azure, and Docker. Furthermore, I am proficient in various databases including MySQL, SQL Server, MySql, and Oracle. I am familiar with different build tools such as Maven, Gradle, Git, SVN, Jenkins, Quickbuild, and Ansible.