Over 22 years of experience working on enterprise class systems. Variety of projects and customers. Always focused on performance and reliability. Always on cutting edge of technology. Keeping in mind business objectives and customers interests. Competencies: • Solution Selection, Architecture Design, Implementation, Customization, Migration, Internal Adoption - Freelance Consulting & Audit BigData & Machine Learning Expertise: • Machine Learning Models adoption from business use-case until production maintenance • Data Collection, Data pipelines, Data Workflows • Big Data ETL & Mining • System Integration I have a solid portfolio of enterprise level, successfully implemented solutions as well as ad-hoc optimizations of existing systems in large, global organizations.

Hello, my name is Vlad. I have 7 years of mobile applications development experience for iOS and Android using Flutter, Dart, Swift, Objective-C and Java. Also I have worked on Flutter plugins and native iOS libraries, Scala, Go. I am quick learner and I am opened for new technologies. I am interested to work on long term projects and I can be a good team player. Please contact me to schedule a meeting.

A Msc. in Electrical Engineering with 12 years of experience in software development for academic and commercial purposes. Team player with a can-do attitude tied with strong autodidact abilities. Great academic research and teaching experience. Academic projects delivered: -C# application for solving Inverse and optimization problems related to three articles related to the thesis: "Nova Proposta de Modelagem da Eletropermeabilização de Células Biológicas", "Análise Numérica de Espectros de Impedância de Suspensões de Células Biológicas" and "Numerical analysis of impedance spectra of yeast suspensions". -C# application for translating discrete event systems automata modelling into PLC code. -Web application using ASP .Net as graphical visualization of discrete convolution. -C# application for constructing panorama images of fiber optics sensors profiles related to the paper: "Characterization of arbitrary fiber taper profiles with optical microscopy and image processing algorithms" -C# application for tomography image reconstruction as co-author for the publication "Analysis and Imaging in Magnetic Induction Tomography using the Impedance Method". Personal project: Reverse engineered TCP communication protocols of a multiplayer card game (Faeria) and built an application for tracking the deck state.

Technical lead in backend, cloud, and data science development Technical competencies - ETL design, pipeline development, maintenance and delivery - Design and integration with Machine Learning models and AI - application and server performance tuning and scaling - API development, testing, and scaling - NoSql database deployment - RDMBS PL/SQL and linux server management - Docker containerization and scaling within Kubenertes - IT project management, Agile and Scrum Master lifecycle overview - Unit testing, structured code review - Code design and architecture expert Almost a decade's worth of coding background. - 6 years Java - 2 years Scala - 4 years in ETL, Oracle, Postgresql, and relational database management - 3 years technical lead/scrum master Excellent design and framework development knowhow. Able to support as PM/Lead or as senior engineer. High sense of urgency in devops and follow up action across the board. Language Fluencies - Scala 2.12+ - Akka frameworks ( graphs, actors, persistence, API ) - Kafka, Pulsar - Java 8+ - Python 2.7 and 3.0 - Backend: - PL/SQL frameworks - Oracle 12c - Postgres - Netezza - SAP Business Objects - Informatica - Serverside: - Kubernetes - Docker - Linux, Redhat Admin - Bash scripting - Devops Monitoring - CI/CD setup Workflow and Process Domains - designing scalable frameworks in data processing and ETL and ELT pipelines - data pipeline development, scaling, and deployment - CI/CD rollouts - cloud infrastructure integration - Microservice design, archtiecture, and deployment - highly concurrent and scaling applications Some noteable projects - REST microservice to convert semi structured data to RDBMS tables on the fly - PoC Big Data rollout using dynamic Kafka stream generators - ETL framework reducing development team by as much as 95% - Security framework for telecommuncations company in Zurich - ELK stack for B2B reporting team - and many more...

With 6+ years of experience in Data Science, Machine Learning, and Python development, I specialize in solving real-world business problems from data cleaning to deploying intelligent models. What I can help you with : -End-to-end Data Science projects (EDA → Modeling → Deployment) -Machine Learning models (prediction, classification, forecasting) -NLP solutions (text analysis, document understanding, automation) -LLM-based applications (ChatGPT, document extraction, summarization) -PDF & document data extraction (OCR, structured pipelines) ->Time Series forecasting and trend analysis ->Data visualization (Tableau, Python dashboards) ->Data cleaning, transformation, and feature engineering (large datasets) Technical Expertise: -Python (Pandas, NumPy, Scikit-learn, TensorFlow) -R programming -NLP: NLTK, SpaCy, Scikit-learn -LLMs & Generative AI (ChatGPT, prompt engineering) -OCR & PDF tools: Tesseract, PDFPlumber, PyPDF2 -Tableau & data visualization What makes me different: I specialize in working with messy, real-world data and documents, not just clean datasets Experience handling large-scale data (10M+ records) without performance issues Combine LLMs + traditional ML + data engineering to deliver complete solutions Focus on usable outcomes, not just models or code Permanent Freelancer Always available 24X7.

"Solved in less than ten minutes what my first hire spent four days making excuses about. Thanks, Mario." Self-taught developer since 2010 with a BEng. in electronics and electrical communications engineering, and a huge passion in pure mathematics. Currently, Software Engineer at Adyen where I help developers test their payment terminals using in-house tools. Previously, a senior performance engineer at Upwork where I built tools to make developers life easier in assessing their product's performance.

Full-Stack Developer specializing in the MERN stack (MongoDB, Express.js, React.js & Node.js) with years of professional experience building scalable, high-performance web and cross-platform mobile applications. I’m passionate about transforming ideas into intuitive digital experiences that drive engagement and growth. 🚀 What I Offer End-to-End Development: Requirements gathering & solution design UI/UX prototyping & interactive wireframes Front-end implementation (React.js, React Native) Back-end architecture (Node.js, Express.js) Database modeling & optimization (MongoDB, Mongoose) Deployment & DevOps (AWS, Heroku, Docker, CI/CD pipelines) Responsive Web Applications: Single Page Applications (SPAs) with React.js & Redux Server-Side Rendering (Next.js) for SEO and performance Integration with RESTful APIs & GraphQL Cross-Platform Mobile Apps: React Native development for iOS & Android Expo & bare React Native workflows Push notifications, in-app purchases, offline storage API Development & Integration: RESTful API design & implementation GraphQL schemas & resolvers OAuth2 / JWT authentication & role-based access control Third-party services (Stripe, Firebase, Twilio, etc.) Database & DevOps: NoSQL data modeling with MongoDB Atlas Automated backups, sharding, replication Docker containerization & Kubernetes orchestration CI/CD with GitHub Actions, Jenkins 🛠️ Technical Skillset Front-End: React.js, Angular, Redux, Next.js, HTML5, CSS3, SASS/LESS, Tailwind CSS, Material-UI Mobile: React Native, Expo, native module integration, Ionic Back-End: Node.js, Express.js, REST, GraphQL, WebSockets, Golang, Rust, Kotlin, Swift, Ruby, Ruby on Rails Database: MongoDB, Mongoose, Redis, Firebase Realtime Database DevOps & Tools: AWS (EC2, S3, Lambda), Heroku, Docker, Kubernetes, Jenkins, Git/GitHub, CI/CD Testing: Jest, Mocha, Chai, Cypress Collaboration: Agile Scrum, JIRA, Trello, Slack 🔍 Why Choose Me? Client-First Approach: I listen, iterate quickly, and keep you in the loop at every stage. Clean, Maintainable Code: I follow industry best practices, code reviews, and writing detailed documentation. On-Time Delivery: Rigorous sprint planning and time estimates ensure milestones are met. Scalable Solutions: Architectures designed to grow with your user base and feature set. Post-Launch Support: Bug fixes, performance tuning, feature enhancements, and monitoring. 📈 My Process Discovery & Planning Kickoff call, requirement gathering & technical assessment Design & Prototyping Wireframes, UI mockups & interactive prototypes Development Agile sprints, regular demos & code reviews Testing & QA Unit, integration & end-to-end testing Deployment & Training Live deployment, user handover & technical documentation Maintenance & Scaling Continuous monitoring, optimization & feature updates 🌐 Let's Build Your Next Project! Whether you need a dynamic web portal, an engaging mobile app, or an integrated full-stack system, I have the experts to bring your vision to life. 📩 Send me a message to discuss your requirements, get a free quote, or schedule a call. I’m excited to partner with you! Let’s create something amazing together.

I have 6 years of working experience in the software industry, and I am confident most as a Backend Developer and Data Engineer. For now, I want to spend more time on the freelance path, to help others solve their problem happily. As a backend developer: - I build microservices using Java and Go - I design a Database schema for features I work on. - I write REST API and work with the frontend team for integration. As a data engineer: - I do ETL tasks. - I write batch jobs and real-time jobs for streaming over 50 GB of data per day. - I store processing data into HBase, MySQL. - I visualize data to make it meaningful to others. Besides, I also spend time playing with frontend stuff such as NextJS, VueJS, CSS. Availability: My time zone is GMT+7, but I am flexible on working time, even at midnight. If you want to work with me for more than 30 hours, just say it, I will consider working more. Let’s work together to turn your idea into reality!

🌟 Top-Rated Flutter Developer | Mobile App Developer | Firebase Expert | Fintech Apps 💰 $25.00/hr ‼️ 𝐀𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞 𝐍𝐨𝐰 ‼️ 🏆 𝟏𝟓+ 𝐘𝐞𝐚𝐫𝐬 in IT (7+ years in Flutter) 📱 200+ 𝐀𝐩𝐩𝐬 Delivered for iOS & Android 💎 𝟏𝟎𝟎% 𝐂𝐥𝐢𝐞𝐧𝐭 𝐒𝐚𝐭𝐢𝐬𝐟𝐚𝐜𝐭𝐢𝐨𝐧 & Repeat Projects ⭐ 𝟱-𝘀𝘁𝗮𝗿 Rated by Global Clients 🌍 Expertise in Fintech & Secure Payment Apps 👋 Hi, I’m Himanshu — a Mobile App Developer & Flutter Expert with deep experience in building scalable apps for startups, fintechs, and enterprises. My focus is on delivering secure, high-quality, and user-friendly apps that help businesses grow. With my expertise in Flutter, Firebase, Supabase, AI/ChatGPT integrations, Payment Gateways, and Advanced API systems, I take your idea from concept to launch with speed and reliability. ⸻ 🏆 Frameworks & Packages ✔ Flutter – Cross-platform apps (iOS + Android) ✔ Firebase / Supabase – Real-time backend solutions ✔ Google Maps / Location Services ✔ Agora SDK – Video & Audio integration ✔ Git / CI-CD – Collaboration & Delivery ⸻ 💯 Firebase Expertise ✔ Firestore & Realtime Database ✔ Firebase Authentication ✔ FCM & OneSignal Push Notifications ✔ Cloud Functions ✔ Crashlytics & Analytics ⸻ 🔥 State Management ✔ BLoC / Cubit ✔ Provider ✔ GetX ⸻ 💸 Payment Gateway Integration ✔ Stripe | Razorpay | PayPal ✔ Apple Pay | Google Pay ✔ In-App Purchases ⸻ 🔗 API Integration Expertise ✔ RESTful APIs ✔ GraphQL ⸻ 💫 Additional Skills ✔ Fintech & Cross-Border Payment Apps ✔ Flutter Web Development ✔ Geolocation & Mapbox ✔ Deep Linking & App Distribution ✔ Secure Authentication (OAuth, Biometric) ✔ AI & ChatGPT Integration ⸻ 🌟 What Clients Say: ✅ “ Great Person with good attitude, will consider for future assignments. ” ⭐⭐⭐⭐⭐ ✅ “Himanshu is fantastic at what he does. He is knowledgable, never falters to meet deadlines, provides useful recommendations and is very hardworking. He single-handedly helped us develop a great Flutter app from scratch and ensured a great working product with amazing UX/UI at each milestone. He will be an asset to anybody who hires him. I will definitely recommend him and I will hire him again.” ⭐⭐⭐⭐⭐ ✅ “Thanks Himanshu for your great work, its not easy to find a freelancer who has highly advanced capabilities in Flutter design, we are happy to work with you.” ⭐⭐⭐⭐⭐ ⸻ 📩 Let’s Build Your App! Message me today and I’ll help you turn your idea into a scalable, world-class mobile app. Best Regards, Himanshu Dhankecha – Flutter Developer | Mobile App Developer | Firebase Expert

- I am proficient in Java, Python, and C# with project experience writing Scala and C++ applications - I pride myself on my ability to communicate with customers and stakeholders - I like to combine coding with my hobbies like creating an automated script to book golf tee times