Hire the Best Apache Developers in Tallinn, EE

I'm an experienced 𝐌𝐚𝐜𝐡𝐢𝐧𝐞 𝐋𝐞𝐚𝐫𝐧𝐢𝐧𝐠 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 and 𝐆𝐞𝐧𝐞𝐫𝐚𝐭𝐢𝐯𝐞 𝐀𝐈 specialist with a background in 𝐃𝐚𝐭𝐚 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 with extensive experience in designing and implementing end-to-end AI and ML solutions. My expertise spans various industries, and I've worked with multi-national teams to deliver innovative solutions. 🌎🏆 Are you looking to optimize your data engineering pipelines or leverage advanced machine learning for real-world impact? Need assistance in designing and deploying robust AI and ML solutions in your business environment? Let's connect and transform your ideas into actionable outcomes. 🔧💻✨ ✔️Core Services ✅ Generative AI and Large Language Models (LLMs)🤖 • Proficient in AutoGen and GPT-3.5-turbo for a range of generative AI applications, from code generation to task automation. • Experienced in creating multi-agent frameworks, conducting reinforcement learning with human feedback (RLHF), and integrating document processing and analysis with tools like ChatGPT and Langchain. • Skilled in designing complex workflows, implementing custom prompts, and exploring parameter-efficient fine-tuning techniques to optimize LLM performance. ✅ Machine Learning and Predictive Analytics📊 • Built ML models for sales forecasting, financial analysis, and other predictive tasks. • Strong background in PySpark and ML algorithms like Prophet and SARIMAX. • Used Google BigQuery, Google Dataproc, and Apache Airflow for orchestration in various projects. ✅ Data Engineering and ETL Pipelines 🔄 • Specialize in designing, optimizing, and migrating ETL pipelines using Azure Data Factory, Databricks, Google Cloud Platform (GCP), and more. • Extensive experience in large-scale data transformation and efficient data flow. ✅ Chatbot Development💬 • Design and deploy intelligent chatbots integrated with various data sources or APIs to enhance customer engagement and streamline business processes. ✅ Custom Python Scripting and APIs 🐍 •Develop custom Python scripts and APIs to interact with databases, AI models, and other software systems, enabling seamless automation and integration with existing workflows. 𝐔𝐧𝐢𝐪𝐮𝐞 𝐂𝐨𝐦𝐩𝐞𝐭𝐞𝐧𝐜𝐢𝐞𝐬: 𝐏𝐚𝐫𝐚𝐦𝐞𝐭𝐞𝐫-𝐄𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐭 𝐅𝐢𝐧𝐞-𝐓𝐮𝐧𝐢𝐧𝐠 (𝐏𝐄𝐅𝐓) ⚙: I have expertise in advanced LLM techniques, including fine-tuning, chain-of-thought prompting, and reinforcement learning with human feedback (RLHF). 𝐀𝐈-𝐁𝐚𝐬𝐞𝐝 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 ⚡: I can help you automate business processes and boost efficiency using AI and ML techniques. 𝐑𝐞𝐬𝐞𝐚𝐫𝐜𝐡, 𝐂𝐨𝐧𝐬𝐮𝐥𝐭𝐚𝐭𝐢𝐨𝐧 𝐚𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 🔬: I offer expert guidance and hands-on development in AI and ML, focusing on delivering practical solutions to real-world challenges. 𝐋𝐞𝐭'𝐬 𝐂𝐨𝐧𝐧𝐞𝐜𝐭: 💡 If you're interested in exploring the potential of AI, data engineering, or machine learning for your business, I'd love to hear from you. Let's discuss your requirements and create tailored solutions to meet your unique needs. Together, we can drive innovation and transform your vision into reality. #MachineLearningEngineer #GenerativeAI #LLMDeveloper #ChatGPTExpert #AutoGen #Langchain #AIConsultant #OpenAI #NLPDeveloper #RLHF #FineTuningLLMs #FreelanceAI #RemoteMLJobs #HireMachineLearningEngineer #AIExpertForHire #FreelanceDataEngineer #RemoteAIProjects #HireLLMExpert #AvailableForFreelance #AIAutomation #AIForBusiness #FintechAI #AIInHealthcare #PredictiveAnalytics #RealEstateAI #SalesForecastingAI #CustomAIDevelopment #AIChatbots #AIInnovation #TechFreelancer #AIProject #PythonDeveloper #FreelancerLife #DataScience #ArtificialIntelligence #TechConsultant #NextGenAI #BuildWithAI

Struggling with unreliable data that slows decisions? With 9+ years as a Data Engineer & AI Developer, I reduced ETL processing time by 80% and scaled BI adoption from 20 to 80+ users for fintech, SaaS, and e-commerce teams. I build Snowflake, dbt, and Python pipelines that turn raw data into trusted analytics. 🚀 HOW I CAN HELP YOU SNOWFLAKE DATA WAREHOUSE DEVELOPMENT Turn scattered data into a single source of truth that improves reporting speed and gives your team trusted numbers to act on. I’ve built scalable warehouses and dimensional models that supported self-service analytics and helped grow BI adoption from 20 to 80+ users. DBT ANALYTICS ENGINEERING Increase metric consistency and reduce reporting errors with clean transformation layers your team can trust. I’ve used dbt to build KPI frameworks and semantic layers that improved decision-making across product, marketing, and executive teams. ETL/ELT PIPELINE OPTIMIZATION Cut processing time and keep data flowing even as volume grows. I reduced ETL runtime from 35 minutes to 7 minutes and have built pipelines handling millions of records daily with strong data quality controls. PRODUCT ANALYTICS DASHBOARDS Give your team clearer visibility into retention, conversion, and user behavior so you can make faster growth decisions. I’ve delivered dashboards and scoring systems that improved retention by 10%, trade success by 14%, and revenue by 12%. AWS DATA ENGINEERING AND AUTOMATION Automate your data workflows and reduce manual overhead across cloud systems. I’ve supported AWS migrations, built Airflow monitoring for delayed data, and designed near real-time systems with 99% data accuracy. 🏆 RESULTS "Originally we planned to do this project in Python. However, after further analysis, we decided to continue Node.Js module and migrate to Lambda. Ehtesham brought in Node.JS / Lambda expert to the project and helped to complete the project. Positive: Good Communication, Availability and Commitment to deliver." – Callkisan P., Client "He is responsive and takes responsibility well. He possesses good AWS, Python and SQL skills. We liked working with him." – Robb G., Client "Ehtesham was an excellent contractor. Knowledgeable, hard working, and responsible for the tasks required of him. Even when the project deadlines got pulled in, he worked hard to get us the results we needed to serve our client. Highly recommended." – Fred V., Client 🎖 Data Science Professional 🏅 Machine Learning Certification 🏅 Data Visualization and Communication with Tableau See full case studies in my portfolio below. 🤝 𝗚𝗘𝗧 𝗜𝗡 𝗧𝗢𝗨𝗖𝗛 Need a reliable data engineer or AI developer for Snowflake, dbt, Python, ETL, or analytics work? Message me on Upwork today for a free consultation and a clear plan to move your project forward. I typically respond within 4 hours and can help with urgent projects when needed. 𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸 I build reliable data systems in Snowflake and BigQuery, using dbt to transform models and Airflow to orchestrate pipelines. I write Python and SQL to automate ETL, validate data quality, and tune performance. I also use AWS to support scalable, production-ready analytics that stakeholders can trust. I build Snowflake data warehouses, automate ETL pipelines in dbt and Apache Airflow, and develop Python machine learning models for analytics.

I’m a Senior Backend Engineer and Software Architect with 9+ years of experience building systems that don’t just work but scale, evolve, and stay maintainable over time. I focus on designing and delivering high-performance, reliable backend systems from early-stage concepts to production systems handling real-world complexity. My work spans microservices architecture, event-driven systems, real-time applications, and modern data platforms (including vector databases). I help teams move from "it works" to systems that are clear, stable, and ready to grow. Over the years, I’ve built and maintained platforms across: - Messaging - Audio & Video Streaming - Ride-sharing - eCommerce - FinTech - EdTech - IoT - Blockchain - Enterprise SaaS often operating at scale, with complex workflows and millions of users. What I bring • Strong backend architecture, systems that are easy to reason about and extend • Deep experience in microservices and event-driven design (Kafka, Temporal, Debezium) • Real-time systems expertise, messaging, streaming, live data pipelines • End-to-end ownership, from system design to production deployment • A focus on clarity, not just code, but how everything fits together Tech I work with - Java (Spring Boot), Golang (Fiber), Python (FastAPI) - PostgreSQL, Redis, MongoDB, ElasticSearch, Cassandra, Weaviate - Kafka, RabbitMQ, Temporal, Airflow - Docker, Kubernetes, AWS (plus real-time protocols like WebRTC, MQTT, XMPP when needed) If your system is growing in complexity, slowing down, or becoming harder to evolve that’s usually where I can help the most. Let’s build something that lasts.

I'm a Full Stack Developer React Node, Full Stack AI SaaS Developer, and Node.js Developer with 15 years of experience in SaaS platforms, CRM systems, and scalable Web Application development from MVP to production launch. 100% Job Success | 125+ projects delivered | 50+ SaaS Platform | 10K+ users | 300K+ API/month As a Full Stack Developer React Node, and Full Stack AI SaaS Developer, I can build: ✔️ SaaS MVP development in 4–6 weeks ✔️ AI SaaS Development for AI-powered SaaS platforms as AI SaaS Platform Developer ✔️ Prototype and proof of concept as a Full Stack node.js react developer ✔️ Custom CRM and ERP systems ✔️ Multi-tenant SaaS platform, booking system, booking platform, website, web app E-commerce marketplaces platform As Full Stack Developer React Node and Node.js Developer I have strong experience with: ✔️ Admin panel, admin dashboard, and analytics dashboard development ✔️ Web Development and Custom Web Application development as a Full Stack Web Developer ✔️ AI Automation, AI workflows, AI Chatbot and AI Agent Development as an AI Developer ✔️ Artificial Intelligence, AI Development, and AI App Development across 35+ AI-powered projects ✔️ role-based access,payment flows, billing and subscription logic ✔️ AI-first approach using Cursor, Claude Code, Codex, and Lovable for up to 30% faster development as a Full Stack AI Engineer ✔️ User Authentication, user management systems, system administrator, and business operations workflows for 10K+ users As a Senior Full Stack Developer React Node and Full Stack AI SaaS Developer, I have strong experience with skills and technologies: ⚙️ JavaScript, TypeScript, Python, PHP ⚙️ React, Next.js, App Router, Vite, Vue.js, Angular, Redux, jQuery, HTML, HTML5, CSS, CSS 3, Canvas ⚙️ Node.js, NestJS, Express, WordPress ⚙️ Tailwind CSS, Material UI, Bootstrap, Shadcn/ui ⚙️ SQL, PostgreSQL, MySQL, MongoDB, Supabase, Firebase, Firestore, Redis, Prisma, RLS, Auth ⚙️ Amazon Web Services, AWS S3, AWS Lambda, Google Cloud Platform, Microsoft Azure, Vercel, Railway, DigitalOcean, Cloudflare, Docker, Kubernetes ⚙️ CI/CD (GitHub Actions, GitLab CI), Testing (Jest, Playwright), Monitoring (Sentry), Logging ⚙️ Git (GitHub, GitLab, Bitbucket) ⚙️ LLM, LangChain, RAG ⚙️ Zapier, n8n, Make, GoHighLevel, GHL ⚙️ HIPAA, SOC 2 ⚙️ Figma, Adobe XD, Sketch My achievements: - Improved page load speed by 35–55% as a Front End developer React and Next.js Developer through optimization - Increased database/API response speed by 3–5x as a Node.js backend developer and NestJS developer - Built 120+ API endpoints, microservices, and serverless functions as a MERN Stack developer and javascript developer - Managed 500K+ records with Database Architecture, Database Design, Prisma, and RLS - Supported 99.9% uptime with cloud deployment and production deployment - Reduced deployment failures by 30–40% through CI/CD and release automation - Handled migration with clear timeline, milestone planning, and long-term maintainability - Improved user experience, engagement, and visibility through dashboards used by 10K+ users As a Senior Full Stack Developer React Node and Node.js Developer I have deep experience in API integration: RESTful API, third-party REST API, webhooks, OpenAI API, Stripe API, Twilio API, Anthropic Claude API, ElevenLabs API, ChatGPT API, GraphQL API, WhatsApp business API, Google OAuth, Google Maps API, Gmail API, Google Calendar API and other Google APIs. As an Experienced Full Stack Developer React Node and Full Stack AI SaaS Developer I cover Full Stack Development, SaaS Development, Front-End Development, Back-End Development, and Software Development. As Full Stack Developer React Node and Full Stack Developer SaaS I experience in: Hospitality, Travel, Healthcare, Fitness, Ecommerce, FinTech, Logistics, Finance, Education, E-learning, Retail, HR, Business Services, Media & Entertainment, AI, SaaS marketing, Real Estate platform, etc. 💪 As CTO of Malevich Studio, I can also help you with: ✔️ Code audit, Software Architecture & Design, production delivery, debugging, and production bug fixing. ✔️ Mobile App Development: mobile app development from design to iOS and Android App Development. Covered by React Native developer, Mobile App developer, and flutter developer positions. ✔️ UX & UI / Web Design: UX Designer support with Figma, Responsive Design, Adaptive Web Design, Software Design, and Adobe Photoshop for 25–40% conversion improvement ✔️ WordPress developer and cms developer for mobile friendly website support ✔️ Python developer, Full Stack developer Laravel Vue, Java and Ruby on rails ✔️ ️Business workflow experience across hr generalist, accountant, cfo, bookkeeper, and communications workflows. 🚀 Click “Invite” if you need a Full Stack Developer React Node, Full Stack AI SaaS Developer, or Node.js Developer.

I'm a senior Aussie developer living in Europe. - 9000+ hours on upwork - 100% success rating top rated plus My skill set is as follows. 💎 Backend skills: ✔✔✔ PHP 7.x ✔✔✔NodeJS ✔✔✔Laravel Framework (5.x) ✔✔✔ NestJS ✔✔✔ Prisma ORM ✔✔✔ Graphql subscription, graphql-codegen, type-graphql ✔✔ CQRS ✔✔ AdonisJS ✔✔✔ Composer ✔✔✔Advanced architectural design patterns 🖼 Frontend: ✔✔✔React ✔✔✔VueJS ✔✔✔ Vuex ✔✔✔ Material UI ✔✔✔ Vuetify ✔✔✔ Quasar ✔✔✔ Redux, Saga, Observables, Thunk ✔✔ AngularJS (1.x, 4+) ✔✔✔ RXJS ✔✔✔ WebpackJS, GruntJS/Gulp ✔✔✔ GraphQL , GraphQL subscriptions, cache, link state 📁 Databases: ✔✔✔ Mysql ✔✔✔Postgres ✔✔ Cassandra ✔✔ MongoDB 🗄Caching: ✔✔✔ Redis with clusters ✔✔memcache 📊 Streaming: ✔✔✔ Websockets ✔✔✔ socket.io + Pusher + PubNub ✔✔✔ Redis Pub/Sub ⌛ Dev-ops: ✔✔✔ Kubernetes ✔✔✔ K8s Secrets / Namespaces ✔✔✔ Helm charts ✔✔✔ Linux/Apache/Nginx/Varnish Cache ✔✔✔ Jenkins / Bamboo CI / Buddy ✔✔✔ Docker and VirtualBox ✔✔✔ AWS / s3 / Route 53 / ECS / EC2 / ECR / EKS / GCP / Azure / Amplify ✔✔✔ AWS Serverless ✔✔✔ Testing: Cypress, PHPUnit, Jest, Mocha, Chai ✔✔✔ E2E/BDD/TDD Unit Testing / Protractor / Selenium ✔✔✔ Kubernetes Secrets management AI: ✔✔✔ Knowledge of OpenAI endpoints ✔✔✔ Api integration with eleven labs voice platform ✔✔✔ Langchain / AutoGPT / SQLAgent I have over 16+ years worth of commercial software development experience and my primary languages are PHP and typescript. I have developed solutions which suit people who want to develop cloud based SaaS to market. 🧱 API Development: ✔✔✔Twilio ✔✔✔ Docusign API ✔✔✔ Tesseract ✔✔✔PyTesseract ✔✔✔Backtrader ✔✔✔ OpenCV ✔✔✔ Pyfolio ✔✔✔ OpenGL ✔✔ Tensorflow ✔✔✔Stripe ✔BrainTree ✔✔✔Pusher 🧿 Version Control: ✔✔✔ GIT ✔✔✔ Git Hooks ✔✔✔ Git auto-deploy

🥇 TOP 1% EXPERT-VETTED TALENT | 💯 100% Customer satisfaction rate | 🏆 16+ years of experience 💬 "The communication with the team was outstanding and that's what really helped clear the slightest misunderstanding that could arise. The platform is exactly how we imagined it and we will surely rehire Shapelab in the future." Anaïs Thys - Business Development Manager at Taobé SPRL 💬 "You only need four words to describe Shapelab OÜ: they make it happen." Luciano Bonanno - CEO at Cigno Technology LTD ➡️ WHAT I DO: I help software businesses to transform digitally by providing high-end expert software engineering and consultancy services. ➡️ HOW I DO IT: With long-standing experience across the full software development life-cycle, Shapelab OÜ has the ability to build qualified and flexible teams for your specific project needs, get up to speed with its goals and start delivering the results instantly. We have experience working in various fields, such as Beauty, Wedding, Real Estate, Insurance and Financial Advising, Crypto Currency Exchange Markets. ➡️ WHO I WORK WITH: Having worked with high-growth teams across many industries Shapelab OÜ focuses on software businesses looking to improve their tech side or bring new projects to life. Shapelab OÜ is ready to serve as a full-stack firm capable of undertaking end-to-end any software application development projects (PHP, Laravel, CodeIgniter, WordPress, JavaScript, ReactJS, VueJS, ReactNative, Amazon Web Services) for both market leaders and emerging businesses that are highly scalable. ➡️ WHAT I DELIVER: Shapelab OÜ provides you with a 100% production-ready solution based on top quality and well-documented code built and secured to the highest standards. Our team can surely handle the platforms with big databases (up to 2TB) and millions of monthly hits. ⭐️ Skills - PHP: Laravel, CodeIgniter, Symfony, PHPSlim, CakePHP - Python: Django, Fast API - JavaScript: TypeScript, ReactJS, VueJS - Mobile app development: ReactNative, Flutter, Swift, Kotlin - Database: MySQL, PostgreSQL, ElasticSearch, MongoDB - Cache: Redis, Memcached - Search engine: ElasticSearch, Sphinx - Cloud infrastructure: AWS, Azure 📞 CONTACT ME: If you know anyone that we can help - reach me out and we'll benefit from being connected!