I build scalable web and database applications, by performing customizations, upgrade package development, versioning, application provisioning, performance monitoring and report development. I follow best practices and code standards for quality assurance, by building secure applications with logging system, monitoring, data validation, error handling, concurrency and performance optimization. I use front-end technologies like Bootstrap, JQuery, JavaScript, AngularJs, C# Razor, ASP.NET MVC to build responsive web design and enhanced user experience. I use back-end technologies like ASP.NET Core, C#, Automapper, Entity Framework, Dapper, NodeJs, Node-Red to build Restful Web API, data integrations and background scheduled jobs. I use database technologies like SQL Server, Transact-SQL, Redgate, Oracle, PL-SQL to build relational model satisfying data integrity and consistency, write database routines, evaluate indexes, performance, query tuning and monitoring. I use a variety of tools like Jira, Github, Bitbucket for application lifecycle management, source control repository and project management. I also develop containerized cloud-based solutions using AWS, Azure and Docker. I have a bachelor’s degree and a master’s degree in Computer Science, focused on data science and machine learning algorithms. I have developed a new technique to solve multi-dimensional clustering problems and I have published an article. I have focus on client requirements, prioritization and deadlines, working on a collaborative remote environment with distributed teams. I have the motivation to learn anything required to deliver the project in which I work.

🎯 Results my clients achieve: → 60% reduction in data processing costs through optimized AWS Lambda and S3 implementations → Automated reporting systems saving 15+ hours weekly across teams → Seamless integration of multiple data sources into unified, reliable data warehouses → Enhanced data quality and governance with proven medallion architecture I specialize in building robust, scalable data solutions that transform business operations. My expertise spans: 🔄 Data Pipeline Engineering: - AWS Lambda-powered data pipelines processing 1GB+ daily data with medallion architecture - Multi-source ETL systems handling PostgreSQL, Snowflake, and BigQuery migrations - Healthcare data integration across 10+ states with automated PDF/Excel parsing - Large-scale YouTube analytics pipeline with geospatial processing - Real estate analytics system with automated data quality checks - Anime seasonal data collection pipeline using MyAnimeList API - Oil price prediction pipeline on AWS EC2 (r5.2xlarge) with PySpark 🛠️ Tech Stack Expertise: Cloud & Infrastructure: - AWS: Lambda, S3, CloudWatch, EC2, CLI - GCP: BigQuery, Cloud Storage - Infrastructure: Docker, Git, CI/CD Data Processing & Storage: - Frameworks: PySpark, Apache Airflow, Pandas, PyArrow - Databases: PostgreSQL, Snowflake, BigQuery, MySQL - Formats: Parquet, CSV, Hive partitioning, XML Analytics & Visualization: - BI Tools: Metabase, Apache Superset, Cluvio, Looker Studio - Libraries: Matplotlib, Seaborn, GeoPandas - Platforms: Amplitude, Google Analytics 4, Chartio AI & ML Integration: - LLM Implementation: Llama2, Langchain, OpenAI - ML Libraries: Scikit-learn, Facebook Prophet, XGBoost - Vector Stores: Pinecone, Hugging Face Embeddings Specializations: - Web Scraping: BeautifulSoup, Selenium, Custom Extractors - API Integration: RESTful APIs, OAuth 2.0, Webhooks - Data Quality: DBT transformations, Custom validation frameworks 🎓 Education & Certifications: - AWS Certified Data Engineer - Associate - Databricks Certified Data Engineer Associate - MS in Business Consulting (Germany) - MS in Big Data Analytics & AI (Russia) 💡 What sets me apart: 1. Proven track record 2. Perfect 5.0 client satisfaction rating 3. Experience across diverse industries (Real Estate, Healthcare, Legal) 4. Strong focus on cost optimization and efficiency 5. Clear communication and detailed documentation Ready to transform your data challenges into opportunities? Let's discuss how I can help optimize your data infrastructure and deliver actionable insights for your business. Let's turn our discussion into action. I can start immediately and deliver the quality results you're looking for.

I help startups and businesses build scalable, secure, and high-performance .NET applications that are designed to grow long-term. I’m a Senior .NET Architect with 15+ years of experience, and I’ve worked as a Full-Stack Developer, Technical Lead, Project Manager, and CTO-level consultant, delivering mission-critical systems for startups, SaaS companies, and enterprises across the US, Europe, and Australia. I specialize in designing and developing enterprise-grade applications using .NET Core, ASP.NET MVC, Web API, C#, SQL Server, Azure, and modern frontend technologies. I don’t just write code — I help architect systems, solve performance bottlenecks, and ensure your platform is reliable, scalable, and future-ready. ⚡ How AI Accelerates Your Project By combining AI with proven engineering practices, I help you: ✔ Launch features 2–5x faster ✔ Rapidly prototype and validate ideas ✔ Improve code quality, readability & test coverage ✔ Detect bugs, edge cases & performance bottlenecks early ✔ Reduce overall development cost & time-to-market 🧠 Why You Still Need a Senior Engineer (This Is Where I Stand Out) AI is powerful — but without experience, it can create fragile systems. With 15+ years of real-world development experience, I ensure: ✔ Clean, scalable, and production-ready architecture ✔ AI-generated code is reviewed, optimized & corrected ✔ Complex problems solved (concurrency, performance, security) ✔ Long-term maintainability (not just quick fixes) ✔ Business-focused solutions — not just code 👉 Result: AI speed + Senior-level reliability 🤖 AI Models & Advanced Tooling I leverage cutting-edge AI to accelerate development while maintaining top-tier quality: • Claude Opus 4.5 & OpenAI Codex 5.2 • Advanced prompt engineering & multi-model workflows • AI-assisted coding, refactoring, debugging & automated testing • Smart code generation with human validation 📩 Let’s Build Something Great If you're looking for fast execution without compromising quality, let's connect. 👉 Send me a message — I’ll review your requirement and suggest the best approach.

Power BI developer + Data Engineering — I build the automated pipelines (Databricks, ADF, SQL, Fivetran) and the dashboards leadership trusts, end to end. If your team is still pulling numbers by hand, stitching exports together, and quietly not trusting what's in the report — your data isn't slow, it's unbuilt. And every decision made on top of it is shakier than it should be. I'm a data engineer and BI specialist with 13+ years building the full path from raw, messy source data to the dashboards leadership actually trusts. Co-founder of GrowthBI, an analytics consultancy serving scaling companies across Australia, Europe, and the US. Here's what makes me different: most freelancers do one half. Pure data engineers hand you clean tables and no story. Pure dashboard builders make polished reports on top of data that breaks every week. I build both halves — the pipeline and the reporting — so you hire one person instead of managing two. 80%+ of my clients come back for follow-on work. Where I deliver the most impact: → Data pipelines & automation — Fivetran, DBT, SQL pipelines that ingest from SAP, CRMs, ad platforms, and spreadsheets, model the data in Databricks/BigQuery, and refresh on a schedule so reports build themselves → Data modelling & warehousing — clean, documented, single-source-of-truth tables your whole team can rely on → Power BI & Looker Studio dashboards for marketing, product, sales, and finance leadership → Executive reporting — YTD, MTD, YOY, and scenario comparisons leadership can act on → Customer & growth analytics — RFM modelling, cohort analysis, churn prediction, CAC vs. LTV, channel attribution → Row-level security (RLS) & governance for multi-team and multi-entity reporting Results I've delivered: → Consolidated [X] disconnected sources into one automated pipeline — eliminated ~[X] hrs/week of manual reporting and gave leadership numbers they could finally trust → 10x growth in customer acquisition — surfaced channel-mix insights that reshaped how a leadership team allocated marketing spend → 10% churn reduction — identified the highest-risk customer cohort with RFM segmentation and built a live re-activation tracker for the sales team → Prevented significant revenue loss — caught a payment failure from a default product setting before it compounded, with a live monitoring dashboard run until the fix shipped My core stack: SQL · DBT · Fivetran · Databricks · BigQuery · Power BI · DAX · Power Query · Alteryx · SSIS · Excel Industries: E-commerce · SaaS · Real Estate · Financial Services · Insurance · Consumer Goods Clients I've worked with: Rate My Agent · Keep It Cleaner · Montgomery Homes · Peeplcoach · Paylater · Joolca I work directly with C-suite leaders, senior leadership teams, and cross-functional analysts. I understand what each team needs to answer — and I build the data layer and the dashboards that answer it, without a manual every time.

Associate Director-level data professional with 10+ years of experience turning complex data into actionable insight across analytics, product operations, and AI-driven solutions. I specialise in end-to-end data workflows — from database architecture and SQL optimisation to interactive dashboards and automated reporting pipelines. My toolkit includes SQL, Power BI, R, R Shiny, and Python, and I hold an MSc in Data Analytics backed by a First Class BSc in Computer Software Engineering. Recent highlights include: ∙ Building R Shiny dashboards to replace legacy manual processes, dramatically reducing turnaround time and human error ∙ Designing and optimising SQL procedures for performance at scale ∙ Delivering analytics solutions aligned to business KPIs in regulated, enterprise environments I bring the rigour of a senior corporate role to every freelance engagement — clear communication, structured delivery, and a genuine focus on outcomes rather than outputs. Whether you need a one-off dashboard, a data pipeline overhaul, or ongoing BI support, I’ll deliver work that’s clean, documented, and built to last.

An experienced MySQL database engineer with a skillset that expands to Django, Python scripting, Ansible, Linux Administration and various web technologies. I have been a Remote DBA, Support Engineer and Consultant for Percona and Pythian database consultancies, which has enabled me to gain a broad view of huge MySQL installations. You will be able to discover various blog posts I have had published on their respective platforms. I am an established speaker at the global MySQL events on topics including High Availability, Backups and Disaster Recovery, Security and Automation.

"I offer a FREE LIFETIME GUARANTEE & FREE TECHNICAL SUPPORT for all my work" ✅ Top Rated Power BI Developer | 100% Job Success Score | 12+ Successful Projects ✅ I help organizations build scalable Business Intelligence solutions that improve visibility, accelerate decision-making, and eliminate manual reporting processes. I'm a Microsoft Certified Power BI Developer and Business Intelligence Consultant with 4+ years of experience transforming complex data into executive-ready dashboards, automated reporting solutions, and actionable business insights. My expertise includes: • Power BI Development & Dashboard Design • Business Intelligence & Data Analytics • Executive Dashboards & KPI Reporting • DAX Optimization & Advanced Calculations • SQL Query Development & Data Analysis • Power Query & ETL Processes • Data Modeling & Performance Optimization • Financial, Sales, HR, and Operational Analytics • Power BI Service Administration & Automation • Row-Level Security (RLS) Implementation • Microsoft Fabric Integration • SAP & NetSuite Reporting Solutions • MicroStrategy to Power BI Migration Recent Project Highlights: ✔ CFO Analytics Dashboard for executive financial reporting and strategic planning ✔ HR Analytics Dashboard providing workforce insights, attrition analysis, and performance tracking ✔ Sales & Profit Analytics Solution delivering actionable revenue and profitability insights I have worked with clients across Finance, Healthcare, Logistics, and other industries, helping organizations replace fragmented spreadsheets and legacy reports with modern, interactive analytics solutions. Whether you need a Power BI Developer, Business Intelligence Consultant, Data Analyst, or a trusted partner to build an end-to-end analytics solution, I focus on delivering scalable, reliable, and business-driven results. Core Technologies: Power BI, DAX, SQL, Power Query, Data Modeling, ETL, Microsoft Fabric, Power BI Service, RLS, KPI Dashboards, Executive Reporting, Financial Analytics, Sales Analytics, Business Intelligence, and Data Visualization. Let's discuss how I can help transform your data into a competitive advantage.

🚀 I help businesses turn raw data into actionable insights. With over 4 years of experience in ETL, data warehousing, and BI solutions, I specialize in building end-to-end data pipelines that support better decision-making in Banking, Retail, Financial Services, etc. Whether you're migrating to the cloud, building dashboards, or transforming raw data into clean, usable formats, I help you get it done faster and more reliably. 🔧 What I Offer: - Data warehousing (Snowflake, Redshift, MSSQL, PostgreSQL) - ETL pipelines (Python, DBT, Matillion, AWS Glue, Azure Data Factory) - BI dashboards (Power BI, Tableau) - Web scraping with Scrapy & Python - Data cleansing and transformation - SQL performance optimization - Cloud solutions (AWS, Azure) 📊 I’ve worked with terabytes of data and developed full pipelines from ingestion to reporting, helping businesses save time, cut costs, and make data-driven decisions. 🛠 Tools & Technologies: Languages: Python, SQL, Java, PHP Reporting: Tableau, Power BI Databases: MSSQL, MySQL, PostgreSQL Cloud & ETL: AWS, Azure, Snowflake, DBT, Matillion Other: PySpark, SAS, Scrapy 📜 Certifications: My profile lists AWS Certified Data Engineer, Azure Data Scientist Associate, and other relevant certifications. Let’s discuss how I can help you unlock the true value of your data.

Transform Your Business with Expert Data Analysis – Trusted by Numerous Small Businesses for Actionable Insights and Growth. Understanding your data is the key to unlocking your business's full potential. As an experienced Data Analyst/Scientist, I specialize in turning complex data into clear, actionable insights that drive revenue, customer retention, and competitive advantage. Here's what I offer: 1. Detailed Analysis to Understand What Fuels Your Success and What Holds You Back. 2. Strategies to Boost Revenue and Enhance Customer Loyalty. 3. Unique Insights to Outshine Your Competitors. I partner exclusively with businesses that prioritize quality, knowing that superior analysis directly translates to increased profitability. If you're dedicated to maximizing every dollar of your business effort, I'm here to make that happen. Looking to elevate your business through data-driven decisions? Send me a message detailing your goals and challenges. I'll respond with tailored advice and we can dive deep into your project specifics.

➤ $1.8M+/year projected savings - AI document search (RAG) for a $300M/year NYC infrastructure contractor: teams search 10,000+ pages per project, daily search time cut from 60 minutes to 10 (Azure, OpenAI). ➤ 2,400+ AI recommendations - 92% mobile adoption, 8.1 chats/user (Next.js, Django, Flutter). ➤ 75% infrastructure cost cut - migrated a $300M/year brand to serverless microservices (AWS, Node.js/TypeScript). ➤ 300k+ monthly users - production ordering platform with payments, subscriptions, and admin dashboard. I'm Luka, a senior full-stack and AI engineer. I own the full stack and the full product process end to end: scoping, UI/UX design (Figma), frontend, backend, web application and mobile application development, AI integration, deployment, and post-launch improvements. From scratch or inside your existing app, from prototype to production. WHAT I BUILD • AI agents and agentic workflows - multi-agent systems, tool use, MCP servers, AI automation and workflow automation that replace manual work • AI chatbot development and AI assistants - customer support chatbot, internal knowledge base assistant, WhatsApp and Telegram bots • RAG and AI document search - semantic search, vector search, embeddings, data extraction, hallucination control and evals • AI voice agents and voice assistants - real-time voice, Whisper, ElevenLabs, Deepgram, Twilio • AI integrations into existing products - OpenAI, Anthropic Claude, Gemini; AI features added to your current software • AI-powered SaaS platform and MVP development - user authentication, payments (Stripe), subscription billing, admin panel, dashboards • Web app development - React, Next.js, TypeScript, Tailwind CSS; fast, scalable, real-time • Mobile app development - React Native (Expo) and Flutter, iOS + Android, App Store launch included • Internal tools, CRM and dashboard builds, customer portals, marketplace and booking platforms • Backend and API development - Node.js, Python (FastAPI, Django), REST API, webhooks, API integration with third-party services SELECTED PROJECTS • Spinio - AI recommendation chatbot for the UK market with 95%+ recommendation accuracy; helps users find the right option through natural language search • Leelou AI - AI voice coaching chatbot for TNM Coaching: instant leadership coaching built on the company's framework, helped them close a 200+ employee enterprise client • SEO AI Platform - AI agents for a large SEO company: content generation, data analysis, and text/image compliance checks; active long-term build, new features shipped every sprint (under NDA) • Ergo Global - private AI customer support system: website chat, internal app chat, and Outlook inbox automation, faster responses while keeping sensitive customer messages private • Juggle Ease - multilingual AI voice assistant inside a family mobile app; users talk to the app and complete tasks hands-free, with responses under 0.5 seconds • Rooost - AI accommodation concierge that gives business travelers local recommendations based on where they are staying STACK Frontend: React, Next.js, TypeScript, JavaScript, Tailwind CSS, Figma-to-code Backend: Node.js, Python, FastAPI, Django, REST APIs, websockets, webhooks Mobile: React Native, Expo, Flutter AI/LLM: OpenAI (GPT, ChatGPT), Anthropic Claude, Gemini, LangChain, prompt engineering, MCP, multi-agent orchestration, LLM evals Data: PostgreSQL, Supabase (Postgres), MongoDB, MySQL, Redis, vector databases (Pinecone, pgvector, Qdrant) Cloud: AWS, Azure, GCP, Vercel, Docker, CI/CD Integrations: Stripe, Twilio, Firebase, WhatsApp, Telegram, HubSpot, Salesforce AI-assisted development: Claude Code, Cursor — with senior-engineer review on every line HOW I WORK My approach is simple, but uncommon. I start each project by setting KPI goals with you and scoping the requirements. Then I dive into development. 1–2 weeks to a proof of concept, 6–8 weeks to a production MVP. Once development is completed, I don't disappear: I stick around for 4 more weeks COMPLETELY FREE to optimize the project until we hit the KPI goals we set, and fix any bugs. I take on 1–2 new builds per month to preserve quality. Message me with your goal and if we're a good fit we can get on a call!