With years of hands-on experience in AWS, ETL engineering, AI, LLM integrations, business automation and business integration, I help teams fix broken pipelines, build end-to-end cloud architectures, and deploy intelligent automation that saves time and reduces operational friction. I build scalable AWS data platforms and AI-powered automation systems that transform raw, messy data into fast, reliable, and intelligent pipelines ready for analytics and production workloads. I build reliable business automation using APIs, Zapier, n8n, and custom middleware. I deliver End-to-end business automation, API-first integrations, and production-grade AI systems across AWS, Zapier, n8n, and custom Node/PHP service 🔹 What I Do Best (and Deliver Quickly) 1️⃣ Scalable AWS Data Engineering High-volume ETL/ELT pipelines (Glue, Lambda, Step Functions, EMR, Athena) Redshift & Lakehouse architecture Streaming ingestion (Kinesis, MSK) Optimized S3 → Warehouse workflows dbt transformations & data modeling 2️⃣ AI & Machine Learning Systems Predictive analytics, forecasting, anomaly detection SageMaker pipelines & model deployment PyTorch & Python ML systems Evaluation, monitoring, and production optimization 3️⃣ LLM / RAG / AI Automation Retrieval-Augmented Generation (LangChain, LlamaIndex) Document intelligence & PDF processing LLM agents using OpenAI, Anthropic, Gemini Model Context Protocol (MCP) integrations Chatbots with citations, vector search, and advanced retrieval 4️⃣ Infrastructure & DevOps Terraform, CloudFormation, CI/CD (GitHub Actions) Highly available containerized workloads (ECS, EKS) CloudWatch dashboards, Prometheus monitoring End-to-end system hardening & cost optimization 5️⃣ Business Automation & System Integration End-to-end business automation and business integration solutions Workflow automation using Zapier and n8n for rapid orchestration Custom Node.js and PHP-based middleware for complex or non-standard integrations API-first system design (SP-API, internal tools, SaaS platforms) Reliable, observable automation pipelines (not brittle scripts) 🔹 My Stack Programming & Data: Python | SQL | PySpark | Node.js | PHP | Java | Scala | Bash | REST APIs | JSON | Data Structures | Algorithmic Problem Solving Cloud & Data Engineering: AWS (Glue | Lambda | S3 | Redshift | Athena | Step Functions | EMR | EventBridge | CloudWatch) | Databricks | dbt | Data Lakes | Lakehouse Architecture | ETL/ELT Pipelines | Data Warehousing | Serverless Architecture | Cloud Security | Cost Optimization | GCP Big Data & Analytics: Apache Spark | Distributed Data Processing | Data Modeling | Analytics Engineering | Business Intelligence | Batch Processing | Streaming Data Pipelines | Data Quality Frameworks | KPI & Metrics Design | SQL Optimization | Query Performance Tuning | Reporting Pipelines AI & Machine Learning: Machine Learning | NLP | Predictive Analytics | LLMs | RAG Systems | OpenAI | Anthropic | Gemini | LangChain | Document Intelligence | Supervised Learning | Unsupervised Learning | Feature Engineering | Model Evaluation | Model Deployment | AI Automation Automation & Integration: Zapier | n8n | Business Process Automation | API Integrations | Event-Driven Workflows | Workflow Orchestration | SaaS Integrations | CRM Automation | Data Sync Pipelines | Webhooks | Low-Code / No-Code Automation | Operational Automation DevOps & Infrastructure: Terraform | Docker | CI/CD | GitHub | GitHub Actions | Cloud Automation | Monitoring I build systems that are scalable, resilient, cost-efficient, and automation-first, designed to integrate seamlessly into real business operations and grow with demand. Let’s Build Something That Scales Whether you need a high-throughput ETL pipeline, a cloud-native AI system, or a fault-tolerant LLM/RAG application, I can help you deliver it quickly and cleanly. Send me a message, I’d love to understand your system and see how I can help.

Last 2 years I've been working as a Mac OS X developer. I have over 10 years of experience in developing SQL-reports, VBA. I've completed more than 600 Excel VBA projects on Upwork and Elance. I graduated from university majoring in Applied Mathematics. I am looking for challenging tasks, not copying existing solutions.

**Senior Full-Stack Software Engineer with 20+ years of experience building, debugging, modernizing, and scaling production software across multiple technology stacks.** I work across the **full application stack — frontend, backend, databases, APIs, AI integrations, cloud infrastructure, and DevOps** — and I’m comfortable joining an existing codebase, even when it uses technologies outside a single fixed stack. ### What I Can Help You With ✔ **Full-Stack Web Development** — React, Next.js, Angular, TypeScript, JavaScript ✔ **Backend Engineering** — .NET / C#, Node.js, Python, FastAPI, PHP ✔ **SaaS Platforms** — multi-tenant architecture, RBAC, subscriptions, dashboards ✔ **AI & LLM Integration** — OpenAI, Claude, RAG, AI agents, document processing ✔ **API Integration** — REST, SOAP, webhooks, OAuth, third-party platforms ✔ **Database Engineering** — SQL Server, PostgreSQL, MySQL, Supabase ✔ **Legacy System Modernization** — understanding and upgrading existing applications without unnecessary rewrites ✔ **Debugging & Production Fixes** — concurrency, performance, API, database and integration issues ✔ **Cloud & DevOps** — Azure, AWS, Docker, CI/CD and production deployments ### I’m Especially Strong at Existing Systems You don't need to have a greenfield project. I can enter an unfamiliar codebase, understand its architecture and business logic, identify the real source of a problem, and make focused changes without breaking functionality that already works. This includes applications built with different frontend and backend technologies — I choose and work with the technology that fits the existing product rather than forcing every project into one stack. ### Recent Work • AI-powered SaaS and workflow automation platforms • Enterprise .NET applications and legacy modernization • React / Next.js dashboards and web applications • Complex REST and SOAP API integrations • Payment and third-party service integrations • Real-time B2B platforms • AI document processing and LLM integrations • SQL Server and PostgreSQL-backed enterprise systems ### Core Technologies **Backend:** C#, ASP.NET Core, .NET 8, Node.js, Python, FastAPI, PHP **Frontend:** React, Next.js, Angular, TypeScript, JavaScript, HTML/CSS **Databases:** SQL Server, PostgreSQL, MySQL, Supabase **AI:** OpenAI, Claude, RAG, AI Agents, LLM APIs **Cloud:** Azure, AWS, Docker, CI/CD **Integration:** REST APIs, SOAP, OAuth, Webhooks, Stripe and third-party APIs Whether you need to **build a product, fix a difficult production bug, modernize an existing system, integrate an API, or add AI capabilities**, I can take ownership from diagnosis and architecture through implementation and deployment. Send me the project details and I’ll quickly identify the best technical path forward.

With over 9 years of experience as a Database Administrator (DBA) and Developer, I specialize in Microsoft SQL Server (MSSQL), MySQL, and PostgreSQL. My expertise spans across database administration, development, performance tuning, security, high availability, and business intelligence (BI) solutions. Having worked extensively in the US healthcare and telecom sectors, I have developed a strong understanding of managing mission-critical databases, ensuring data integrity, optimizing performance, and implementing security best practices. 1. Database Administration (MSSQL | MySQL | PostgreSQL) Managing enterprise-grade databases requires precision, and I ensure smooth operations through: ✔ Database health monitoring – Proactive tracking of server performance and system resources ✔ Performance tuning & troubleshooting – Optimizing indexes, execution plans, and query structures ✔ Backup & disaster recovery (HA/DR) solutions – Implementing Always-On, Replication, Mirroring, and Clustering for high availability ✔ Security & access control – Implementing role-based access, encryption, and compliance-driven security measures ✔ Server migration & upgrades – Seamlessly transitioning databases across different environments 2. SQL Development & Query Optimization A well-optimized database accelerates business applications. My SQL development skills include: ✔ T-SQL, PL/pgSQL & Stored Procedure Development – Writing efficient queries for high-volume transactions ✔ Query performance tuning & indexing – Enhancing speed and efficiency of data retrieval processes ✔ Managing heap tables & statistics collection – Optimizing data structures for better performance ✔ Execution plan analysis & partitioning – Leveraging advanced database techniques for scalability 3. Business Intelligence (BI) & Data Analytics Transforming raw data into meaningful insights is crucial for modern businesses. I specialize in: ✔ Data Warehousing & ETL (Extract, Transform, Load) Processes – Managing structured data for analytics ✔ SSIS & Power BI – Creating automated data pipelines and business intelligence reports ✔ SSRS & PostgreSQL Reporting – Developing interactive reports for informed decision-making 4. Compliance, Auditing & Security Management Handling sensitive data requires strict security measures. My security and compliance expertise includes: ✔ Database auditing & monitoring – Ensuring accountability and tracking user activities ✔ Regulatory compliance – Implementing HIPAA, GDPR, and other industry standards ✔ Security hardening & encryption – Preventing unauthorized access and safeguarding critical information

With over 6 years of hands-on experience in building and optimizing data pipelines, I specialize in delivering end-to-end data engineering solutions that scale. Whether it's setting up robust ETL workflows, migrating to the cloud, or implementing real-time data streaming, I bring a performance-driven approach to every project. 🔧 Core Skills & Technologies: Cloud Platforms: AWS (Glue, S3, Redshift, EMR), GCP (BigQuery, Dataflow), Azure Data Engineering Tools: Apache Spark, Airflow, Kafka, DBT, Hadoop Languages: Python, SQL, PySpark, Bash Databases: PostgreSQL, MySQL, Snowflake, MongoDB DevOps & CI/CD: Docker, Terraform, Git, Jenkins

Have Worked as a Team Lead in a well Reputed Software Development Company. Working Experience is over 9 Years in C#.Net VB.Net Asp.Net ETL, SSIS Packages SQL Server, SQL Compact, Sqlite, MySQL Crystal Reports Web Services / Web APIs I have Excellent skills to communicate with the client to understand client's requirements.

I'm a Full Stack Developer React Node, SaaS Developer, and Node.js Developer with 15 years of experience, covering Full-Stack development, SaaS development, Mobile App Development, and AI Automation. A few facts about me: 🏆 100% Job Success score 🏆 125+ projects delivered from MVP to enterprise projects 🏆 10,000+ active users across delivered projects What I can develop: ✔️ B2B, B2C, AI-powered, Multi-tenant SaaS platforms as a SaaS developer with experience in 50+ SaaS Platform development ✔️ AI Automation, AI workflows, AI Chatbot and AI Agent Development that reduces manual operations by up to 70% ✔️ Prototype and proof of concept development saving 40% of budget as a Full Stack node.js react developer ✔️ Custom CRM and ERP systems, Internal tools and other management solution cutting admin costs by 40% as a Full Stack Developer React Node ✔️ Booking systems and booking platforms that boosting daily bookings by 30% ✔️ Marketplaces, E-commerce and fintech platforms that boosting sales conversions by 25% ✔️ Admin panel, admin dashboard, and analytics dashboard with charts that cutting reporting time by 60% ✔️ Custom scalable Web Application, website and other Web Development projects driving 40% more organic traffic as a Full Stack Web Developer ✔️ Mobile applications from design to iOS and Android App Development, covered by React Native developer and Mobile App developer ✔️ Code audit, Software Architecture & Design, production delivery, debugging, and production bug fixing, reducing errors by 40%. ✔️ role-based access, payment flows, billing and subscription logic, cutting failed payments by 30% ✔️ User Authentication, user management systems, system administrator, and business operations workflows for 10,000+ users Why clients choose me as a Technical partner: ✔️ SaaS MVP development in 4–6 weeks ✔️ AI-first approach using Cursor, Claude Code, Codex, and Lovable for up to 30% faster development as a Full Stack Developer React Node ✔️ AI Development and AI App Development experience across 35+ AI-powered projects ✔️ Improving page load speed by 55% as a Front End developer React ✔️ Increased database/API response speed by 5x as a Node.js backend developer and Node.js 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 ✔️ Improved user experience, engagement, and visibility through dashboards used by 10K+ users As a Senior Full Stack Developer React Node and SaaS Developer, I have 15+ years of experience with: ⚙️ JavaScript, TypeScript, Python ⚙️ React, Next.js, App Router, Vite, Vue.js, Angular, Redux, jQuery, HTML, HTML5, CSS, CSS 3, Canvas ⚙️ Node.js, NestJS, ExpressJS ⚙️ 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 ⚙️ Testing (Jest, Playwright), Monitoring (Sentry), Logging ⚙️ Git (GitHub, GitLab, Bitbucket) ⚙️ LLM, LangChain, RAG, Artificial Intelligence ⚙️ Zapier, n8n, Make, GoHighLevel, GHL ⚙️ HIPAA, GDPR, SOC 2 ⚙️ Figma, Adobe XD, Sketch 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, and various Google APIs. As Full Stack Developer React Node and SaaS developer I experience in projects for: 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 provide: ✔️ UX & UI / Web Design: UI UX Designer support with Figma, Responsive Design, Adaptive Web Design, Software Design, Graphic Design and Adobe Photoshop for 25–40% conversion improvement ✔️ Shopify, PHP or WordPress developer and cms developer for mobile friendly website support ✔️ Python developer and Full Stack developer Laravel Vue Other skills: Application Improvement, Software Development, Software Debugging, Software Consultation, Agile Software Development, Desktop Application, Software Testing, Standalone Application, CodeIgniter, Apache Hive, Jakarta Server Faces, Hybris, Cloud Computing, Java, Ruby on rails, Back-End Development Framework, Front-End Development Framework 🚀 Click “Invite” if you need a Full Stack Developer React Node, Full Stack AI SaaS Developer, or Node.js Developer.

Headline: Over 5 years of experience across the Financial Services sectors, SaaS, Human Resources, Marketing, Manufacturing with expertise in Data Engineering, Data Modeling and Data visualization. Proficient in writing SQL queries using joins, sub queries and correlated sub queries to retrieve data from the database. Strong skills in the development of automated reporting and dashboards with merging and data transformation. Skills : SQL, DAX, M, Power BI, Tableau, Google Data Studio, Data Analysis, Data Visualization, ETL, MySQL, Microsoft SQL Server, Postgres, Big Query, Azure Data Factory Description: ⦿ Independently discovered solutions and collaborates on insights and best practices. ⦿ Experienced with self-service query tools and dashboards - preferably Power BI, Tableau, Google Data Studio ⦿ Understood star schema design and managing large data volumes. ⦿ Assisted creation of new measures and dimensions in existing cubes to enhance business analysis - preferably SSAS ⦿ Utilized Microsoft Power BI to create new reports for all functions of business sales, production, inventory, purchasing, accounting, etc. ⦿ Implementation BI solutions from scratch - preferably Power BI ⦿ Responsible for delivering reports tailored to client requirements, leveraging the data from the MySQL, PostgreSQL, Big Query, Google Analytics, MS SQL Server, Salesforce, API ⦿ Collecting and mining data from different data sources, cross-function analysis Several feedbacks from employers: "Evgeniy was very flexible to work with, his Power BI skills are great! He understood the work required, and was able to bring our vision to life with ease. We will happily hire Evgeniy again." - Adam Gabriel, J&J "Evgeniy delivered great work on this data analysis project. Final results, communication and speed of delivery were fantastic. Will definitely be hiring him again. Thanks Evgeniy!" - Kara Sherman, Corel Corporation,

I am a Python Developer and Automation Specialist with over 7 years of experience helping businesses streamline operations, automate repetitive tasks, and transform raw data into actionable insights. I specialize in building scalable automation systems, data-driven solutions, and custom web-based tools that improve efficiency, reduce manual effort, and support better decision-making. Core Expertise * Python automation and scripting * Web scraping and data extraction * API integration and backend automation * Data analysis and reporting using Python, SQL, and Excel * Workflow automation for business processes * Google Apps Script and VBA automation * Development of web applications and internal tools * Chrome extension development for productivity and automation Professional Experience Over the past 7+ years, I have delivered a wide range of automation and data-focused solutions across different industries, including: * Building automated data collection systems from websites and APIs * Designing end-to-end workflow automation for businesses and startups * Creating custom dashboards for real-time reporting and analytics * Developing Excel and Google Sheets automation systems using VBA and Apps Script * Writing Python scripts for processing, cleaning, and analyzing large datasets * Integrating third-party APIs into business workflows * Developing lightweight web applications and internal business tools My solutions are focused on reliability, scalability, and usability, ensuring they work efficiently even for non-technical users. My Working Approach I focus on solving real business problems rather than just writing code. My process includes understanding: * Current workflow challenges * Time-consuming manual processes * Opportunities for automation and optimization Then I deliver solutions that are: * Clean and maintainable * Performance optimized * Easy to integrate into existing systems * Designed for long-term use and scalability Let’s Work Together If you need help with Python automation, data processing, web scraping, API integration, or building custom tools and workflows, I can help you create efficient and reliable solutions tailored to your needs. My goal is to help you save time, reduce manual work, and improve productivity through automation and smart system design.

Top 1%; part of the UpWork's Expert-Vetted and Top Rated Plus programs. Data Engineer and Python Expert with 18+Years Azure Cloud, Synapse, Microsoft Fabric, PowerBI, AWS Cloud, ETL Pipelines, Azure Data Factory(ADF), Azure Function App, Python, GCP, NoSQL, MongoDB, SQL Query Optimization, Oracle 12c, SQL, PL/SQL, Unix Shell Scripting, Perl, NodeJS, Apache Airflow, MySQL, Web Development, Technical Recruitment, VBScript, JavaScript, Microsoft .NET, SSIS, ASP .NET, Advance Excel. My 18+Years of total work experience covered following but not limited to: ETL process for Data Warehouse using Python, SSIS and Azure Data Factory Marketplace APIs Integration (Amazon SP-API, Amazon MWS, Walmart, eBay, Wish, Unicommerce, ChannelAdvisor API) Exposure to Azure, AWS Cloud technology, Google Cloud Platform Data Extraction using SQL and PL/SQL Azure SQL, Microsoft SQL Server, Amazon Redshift, Snowflake, Transact-SQL API integration using Python Programming MongoDB Server, Atlas and MongoDB Compass Database Architecture Design Oracle 12c Query Optimization and Performance Tuning Database Migration Solution Design Candidate Recruitment Process Preparing Financial Reports Writing Technical Documents(ERD) Application and Software Development Microsoft .NET UI Development SSIS Development with SQL Server 2019 Microsoft Visio Design Solutions Project Requirement Gathering, Task Prioritization and Resource Planning Worked as SCRUM master in Agile Projects JIRA Board Management, Resource Allocation, Sprint Planning, Standups and Stakeholders Management Project Tracking and Managing Documents and their versions on Confluence Oracle Certified Associate Microsoft .NET Certified Professional and Technology Specialist MBA with Finance and lots of more...!!