I’m a full-stack developer specializing in building scalable web and mobile applications with a strong focus on backend systems and security. I work with Node.js, Express, FastAPI, and React to develop efficient and reliable applications, and I have experience with databases like PostgreSQL, MySQL, and ClickHouse. I also build Android and Flutter apps and perform security testing using VAPT techniques and tools like Burp Suite. Whether you need a complete application, backend APIs, or a secure and high-performance system, I can help deliver a clean and effective solution from start to finish. I value clear and consistent communication throughout the development process.

Data Engineer — ETL Pipelines, Dashboards & AI Assistants | ClickHouse · dbt · Power BI · Python I help businesses turn scattered, messy data into fast, reliable insight — and I start by understanding the decision you're trying to make, not just the report you asked for. As the sole data specialist for a 600-user company, I've built and run the full stack: data pipelines (dbt, DLT, Airflow), a high-performance warehouse (ClickHouse, PostgreSQL, SQL Server) handling ~1M records/month, and 40+ dashboards in Power BI . I recently rebuilt a central platform to cut storage 10× and speed queries 30–50×. I can help you with: - Dashboards & reporting automation (Power BI) — one client saw 90% less manual work - Data pipelines & ETL/ELT (dbt, Airflow, Docker, API ingestion) - Database & SQL performance tuning (ClickHouse, PostgreSQL) - Private AI assistants / RAG over your own docs (Ollama, pgvector) — with security guardrails I communicate clearly, ask the right questions up front, and deliver work your team will actually use. Tell me what you're trying to achieve — I'll map it into a concrete plan.

I help product teams fix slow backends and ship under real deadlines. What I do best: • ClickHouse - schemas, aggregations, materialized views, dictionaries, reporting layers that actually scale • Redis - real data structures (leaderboards, sorted sets, maps) under load, not just cache • Node/NestJS (TypeScript) microservices, Kafka producers/consumers, MySQL/PostgreSQL • Production performance debugging - find the bottleneck, fix it, explain what broke and why 10+ years in production backend, most recently on high-load products where latency and correctness both matter. I've handled production incidents, on-call rotations, and data migrations on live systems. I stay calm under pressure and communicate clearly with engineers and business stakeholders.

Data Engineer with 3+ years of experience in SaaS analytics, specialising in Lakehouse and Data Warehouse architecture, ETL/ELT pipelines, and dbt-based data modeling. I re-architect fragmented operational data into governed, analytics-ready platforms. That work cut a core pipeline's runtime by 90% and, paired with better dashboards, helped grow revenue 67% at my last company. My focus spans data engineering and BI: replacing slow batch jobs and dashboards nobody trusts with pipelines finance and product teams can rely on. Key impact: • Cut total pipeline runtime by 90%, from 40 minutes (ingestion only) to about 4 minutes end to end, by re-architecting the company's Data Warehouse from a full load into a Lakehouse with dbt-based incremental ingestion • Reduced dashboard load times by up to 96% (about 30 seconds to about 1 second) by refactoring the BI layer in Metabase • Built the company's first consolidated Data Warehouse, unifying PostgreSQL and MongoDB, then used it to cut overflow accounts 52% and grow revenue 67.35% Core expertise: • Data Engineering: ETL/ELT pipelines, dimensional modeling (Star Schema), Medallion architecture, incremental ingestion • Tools & Orchestration: dbt, Docker, Apache Airflow, GitHub Actions (CI/CD) • Databases & BI: PostgreSQL, MongoDB, ClickHouse, Delta Lake, Metabase, Streamlit • Programming: Python, SQL, PySpark I hold a Bachelor's in Computer Engineering from Instituto Federal Catarinense, with certifications in Google Data Analytics, Databricks Data Ingestion with Lakeflow Connect, and Microsoft Azure AI Fundamentals (AZ-900).

Hi, I'm Owais. I've spent 7+ years building data systems across enterprise and startup environments. I've set up entire data platforms from end-to-end on AWS, Azure, and GCP, including in SOC 2 and HIPAA environments. I've built ETL pipelines that don't break at 3 AM, modeled warehouses that survive contact with real business logic, and shipped dashboards people actually open. These days I help growth-stage startups build analytics platforms around AI without bleeding money on it. Natural language to SQL, agents that surface insights instead of waiting to be asked, automated anomaly detection, the kind of features your customers are starting to expect. Most AI-in-analytics projects don't fail because the model isn't good enough. They fail because the foundation underneath it is a mess. A well-documented dbt project does more for AI accuracy than a bigger LLM, and if your dashboards aren't getting opened, adding AI on top doesn't change anything. If you're trying to build AI-powered analytics and want someone who's done the unglamorous work that makes it actually useful, let's talk.

Are you struggling with a legacy PHP monolith that slows down feature delivery? Or perhaps you need to scale your backend to handle millions of daily events? I am a Senior Backend Engineer with over 12 years of commercial experience designing, building, and optimizing scalable web applications. My core expertise lies in the PHP ecosystem (with ~7 years dedicated to Symfony) and modern architectural patterns like Event-Driven Architecture (EDA), Domain-Driven Design (DDD), and microservices. Here is how I can help your business: Legacy Modernization: Safely migrating monolithic systems (Zend/CodeIgniter/Yii) to modern Symfony ecosystems with zero downtime using the Strangler Fig pattern. Highload & Data Pipelines: Building infrastructure to process thousands of RPS and millions of daily events using Kafka, RabbitMQ, and ClickHouse. FinTech & Security: Architecting PCI-DSS compliant B2B platforms, implementing complex KYC/AML compliance pipelines (fuzzy matching), and developing robust transaction/billing logic. I believe in pragmatic engineering. I don't just write code; I choose the right tools for the job, balance microservices design to avoid network latency, and deliver maintainable, test-driven architectures. Core Tech Stack: PHP (5.6 - 8.x) | Symfony (2.4 - 7.x) | Lumen MySQL | ClickHouse | MongoDB | Elasticsearch Kafka | RabbitMQ | Redis Docker | AWS | Git | CI/CD If you need a reliable engineer to safely refactor your core product, build secure financial logic, or set up high-performance data pipelines, let’s connect and discuss your project.

PROFESSIONAL SUMMARY I’m a Database Engineer / MongoDB DBA with 3+ years of experience working with production database environments, database performance, automation, ETL workflows, and data processing systems. My core experience includes MongoDB administration, query optimization, indexing, aggregation pipelines, schema validation, production troubleshooting, monitoring, and database performance analysis using tools such as system.profile, explain(), CloudWatch, Grafana, and Kibana. Alongside database administration, I build automation systems using Python, n8n, REST APIs, webhooks, Docker, Git/GitHub, and scheduled workflows. I have worked on automated ETL pipelines, reporting systems, ClickHouse data pipelines, server deployments, and automated report/notification workflows. Key areas: • MongoDB Administration & Performance • Database Automation • Python & Workflow Automation • ETL / ELT • n8n & Webhook Automation • ClickHouse • PostgreSQL • Docker & Linux • REST API Integration • Git/GitHub • Monitoring & Observability • Data Validation & Data Quality I am currently expanding my expertise in PostgreSQL, AWS, Kafka, Spark, Kubernetes, Terraform, Data Engineering, SRE, and AI-assisted database operations.

My Core Expertise 🔹 Advanced Excel Dashboards with automation & visual storytelling 🔹 Tableau reports & interactive business dashboards for decision-making 🔹 End-to-end Data Analysis — from cleaning to insights 🔹 Python & SQL for automation, analytics, and performance optimization 🔹 Streamlining workflows and turning raw data into actionable business intelligence Why Clients Choose Me ✅ I combine the precision of a data analyst with the creativity of a dashboard designer, ensuring clarity and impact in every project. ✅ I don’t just build dashboards — I solve business problems, automate manual work, and help you make data-backed decisions faster. ✅ You get clear communication, reliable delivery, and solutions built to last — not quick fixes. 📊 Recent Projects Include Creating an interactive Tableau Sales Dashboard for marketing insights Developing a fully automated Excel expense tracker with macros & KPIs Writing Python scripts to clean and visualize large datasets Building SQL pipelines for monthly performance reporting Designing a finance and KPI dashboard combining Excel + Tableau ⏱️ Availability Available for part-time or project-based work. I focus on quality, transparency, and impactful results that improve business efficiency. 💬 Let’s Work Together If you’re looking for a professional who can turn your data into clarity and insight, and deliver beautiful, functional dashboards powered by Excel, Python, SQL, or Tableau — let’s connect and make it happen.

I’m a Software Engineer with hands-on experience in building scalable, reliable, and high-performing applications. My expertise spans both backend and frontend development, allowing me to deliver end-to-end solutions from architecture design to production deployment. 🔹 Backend & Architecture Proficient in Golang and Java, with practical experience in designing modular monolith and microservice architectures. Strong knowledge of n-tier architecture, TDD, and modern engineering practices. Skilled in designing robust queue-based systems using RabbitMQ and Kafka. Experienced with high-performance databases and caching technologies including PostgreSQL, Redis, and ClickHouse. Familiar with ORM frameworks and efficient data modeling for large-scale systems. 🔹 Frontend Development Proficient in React and TypeScript, capable of creating modern, user-friendly, and responsive web applications. 🔹 End-to-End Project Delivery I can take projects from idea to execution — designing the architecture, implementing services, integrating queues and storage layers, and delivering production-ready systems. My approach is pragmatic, test-driven, and focused on performance and maintainability. If you’re looking for someone who can not only write clean code but also design scalable systems and deliver complete solutions, I’d be happy to help.

👋 Hello, I'm Ruslan, a passionate and versatile software engineer with a wealth of experience across a variety of technologies. My expertise lies in creating robust and efficient solutions, and I thrive in dynamic environments. Here's a snapshot of my skills: Languages: - Python 🐍 - PHP 🚀 - Java ☕️ - Dart (for Flutter) 🦋 Frameworks: - Django 🎸 - Laravel 🌐 - Symfony (including Symfony 4) 🚀 - Spring Framework 🌱 - Flutter (for Android and cross-platform mobile apps) 📱 - Big Data and Streaming: - Apache Kafka 🚀 - Apache Flink 🌊 - Apache Cassandra 🏛️ - ClickHouse 📊 - Apache Airflow ☁️ Databases: - PostgreSQL 🐘 - MySQL 🌐 Web Technologies: - HTML5/CSS3 💻 - JavaScript/ES6 🌐 Mobile Development: - Flutter app development for Android and cross-platform solutions 📲 Database Management: - Efficient in database design, optimization, and administration. Collaboration: - Experienced in version control systems (Git) 🔄 - Collaborative development using tools like Jira, Trello, etc. Why Choose Me? - Proven track record in developing scalable and high-performance applications. - Strong problem-solving skills with a focus on clean and efficient code. - Adaptable and quick to learn, ensuring the use of the latest technologies. - A commitment to delivering quality work within deadlines. - Excellent communication and teamwork skills. Let's Build Something Amazing Together! I'm available for freelance projects — from building modern web and mobile applications (including Android apps with Flutter) to implementing data pipelines or optimizing database performance. Let's collaborate to turn your ideas into reality. Reach out, and let's discuss how I can contribute to your project's success.