I am a Big Data Development Engineer with over 7 years of experience in designing and implementing cutting-edge data solutions. My expertise lies in leveraging big data technologies to drive insights and optimize system performance. I excel in collaborative environments, where my strong communication skills and adaptability shine. I have a proven ability to troubleshoot complex issues under pressure and take on innovative challenges with enthusiasm. I have worked with diverse teams and am skilled at finding the best approach to fit each project's unique needs. My commitment to continuous learning enables me to stay ahead of industry trends and adapt to new technologies quickly. If you’re seeking a reliable engineer who can turn data challenges into actionable strategies, let’s connect to discuss how I can contribute to your project.

I help startups and businesses launch & scale SaaS products quickly by developing fast, scalable, and investor-ready MVPs using Next.js, React, and Node.js. 🔹 Looking for a developer who gets tech and business? I focus not just on coding but on building market-ready SaaS solutions that help you validate ideas, attract users, and secure funding. 🔹 Need an MVP in 4–6 weeks? I specialize in rapid development while ensuring scalability and maintainability, so your product can grow effortlessly — on web or mobile. 📈 Recent Success Stories ✅ GetPin: Built a SaaS platform that helped hundreds of businesses manage their online presence across Google Maps and social platforms, streamlining marketing efforts significantly. ✅ Torc: Created the UI for an AI-driven hiring SaaS, enhancing user engagement with optimized frontend workflows. ✅ 2Smart Cloud: Developed a React Native app for an IoT platform, enabling real-time device control and improving system performance noticeably. ✅ Cabin Select: Implemented real-time booking and payment integrations for a travel SaaS, speeding up the booking process effectively. ✅ Ukrainian Tactical Gear: Volunteered to build an e-commerce store for a popular Instagram-based tactical gear brand, supporting a Ukrainian combat unit’s needs. Delivered a fast, scalable platform with automated order processing in 4 weeks, enabling sales of 500 tactical shirts in one month to fund critical supplies. 📩 Need a scalable SaaS MVP that delivers results? Let’s chat! 🚀 🛠 Tech Stack & Expertise Frontend: ✅ React, Next.js (SSR, SSG) ✅ TypeScript, JavaScript (ES - Latest) ✅ Material-UI, Vite Backend & APIs: ✅ Node.js, Express ✅ GraphQL, REST, WebSockets ✅ Firebase (Auth, Firestore, Cloud Functions) Databases & Payments: ✅ PostgreSQL, MongoDB, MySQL ✅ Stripe, Airwallex, OAuth, JWT Mobile & Automation: ✅ React Native, Expo ✅ Push Notifications, Telegram Bots Cloud & DevOps: ✅ AWS (EC2, S3, RDS, Lambda, Route53) ✅ Azure, Vercel, Docker, CI/CD Extras: ✅ Performance Optimization ✅ Unit & e2e Testing (Jest, Cypress) ✅ Agile, Git, GitHub Actions 💼 Who I Work With: 🚀 Startup Founders: Bring your idea to life & get investor traction fast. 💰 VC-Backed Companies: Build scalable platforms that attract users & revenue. 📈 Growing SaaS Businesses: Upgrade your app, optimize infrastructure & boost performance. 💡 I follow a simple but effective process: 🔹 Understand your goals and user needs 🔹 Propose a tailored architecture and roadmap 🔹 Align on scope & timeline 🔹 Start development and keep you in the loop 🔹 Deliver, iterate, and scale 📩 Let’s build something great together – just drop me a line! 🚀 Now, it's time for Upwork SEO: web development, senior developer, CTO, lead developer, PWA, User Interface, User Experience, UI, UX, Web-design, MVP, Mock-up, Design Expert, MUI, MaterialUI, React, Redux, jQuery, Bootstrap, SASS/LESS, CSS3, HTML5, Webpack, React Native, NextJS, NestJS, Node.js, TypeScript, Desktop, MongoDB, PostgreSQL, MySQL, Redis, Oracle DB, HBase, Microsoft SQL, Docker, iPhone, Application, Usability, Website, Logo, Logotype, Responsive, Adaptive, Website Prototyping, Wireframe, Update, Solutions, Long term, Effective, Productive, Experienced, Job, SAAS, Hire, Team Leader, Testing, IT, Tech, Technology, project manager, agile, kanban, scrum, startup, SaaS Scaling, Technical Strategy, Startup CTO.

10+ years of experience in architecting, designing and developing software across large scalable distributed systems and web applications. In my past experiences, I have been responsible for end-to-end development of features for Paytm Mall (Ecommerce), Paytm Smart Retail (B2B) and Paytm For Business(Merchant Platform). I am currently working on development of inhouse analytics platform for flipkart as Abobe Analytics is not scaling anymore at Flipkart's scale. Languages: Java, Scala, Python, JS Technologies: Spring, Spring Boot, Apache Flink, Spark,Django , Node.js, Express, Flask Data: Hibernate, Hadoop, Hive, Hbase, Druid, MySQL, SQLite, PostgreSQL, Elastic Search, Redis, SQLAlchemy Others: Kafka, RabbitMQ, Jenkins, Kibana, Nginx, Gunicorn, Celery, Supervisor, Datadog, JIRA, Git, CI/CD, TDD

open to work for part time, contract, contract to hire or full time .With over 14 years of experience in the dynamic field of data science, machine learning, and artificial intelligence, I am a seasoned expert who has honed my skills across the three major cloud platforms: AWS, Azure, and GCP. My proficiency extends to specialized environments like Azure GovCloud and AWS GovCloud, which meet the stringent compliance requirements for government-related data solutions. My services offer comprehensive design and implementation of data solutions tailored to customer needs, including the creation of real-time data ingestion pipelines that are robust and scalable. I am adept at writing PySpark code and crafting AWS Lambda functions, ensuring seamless integration within AWS services. My ability to design and develop end-to-end production pipelines is complemented by a rich background in the defense industry and significant tenure at a leading software company, Microsoft. I bring to the table a wealth of knowledge and experience that can cater to any data-related project, with a commitment to delivering high-quality and secure data solutions. Whether you're looking to migrate to the cloud, optimize your data processes, or develop sophisticated AI models, I am equipped to drive your project to success, delivering solutions that are not only effective but also compliant with industry standards.

* PCEP * Python Expert * Ruby on Rails Expert * DevOps Enthusiast * Technology Geek * E commerce Expert

# Senior QA Engineer | AI QA Specialist | Data Analyst | AI Automation Expert | API Testing | Performance Testing | AI Solutions ## Professional Summary I am a **Senior Software QA Engineer, AI Specialist, and Data Analyst** with **8+ years of experience** delivering high-quality software solutions across Banking, Telecom, Enterprise, Web, and Mobile applications. I help startups, agencies, and businesses build reliable, scalable, and intelligent digital products through **Software Quality Assurance, AI-powered automation, Data Analytics, AI Chatbot solutions, AI content generation, and AI-assisted website development**. My expertise combines traditional QA methodologies with **Generative AI, Prompt Engineering, AI automation, Data Analytics, and AI productivity tools** to accelerate testing, improve software quality, optimize business processes, and support data-driven decision-making. ## Core Expertise ### Software Quality Assurance * ✔ Manual Testing * ✔ Web Application Testing * ✔ Mobile Application Testing (Android & iOS) * ✔ API Testing (Postman, REST Assured) * ✔ API Automation Testing * ✔ Functional Testing * ✔ Regression Testing * ✔ Smoke & Sanity Testing * ✔ User Acceptance Testing (UAT) * ✔ Integration Testing * ✔ Cross-Browser & Cross-Platform Testing * ✔ Performance & Load Testing (LoadRunner, JMeter) * ✔ Defect Management (Jira, Azure DevOps) * ✔ Test Planning & Strategy * ✔ Test Case Design & Execution * ✔ Bug Reporting with Detailed Documentation * ✔ SDLC, STLC & Agile/Scrum Methodologies ### Artificial Intelligence & Generative AI * ✔ Prompt Engineering * ✔ AI-Assisted Test Case Generation * ✔ AI-Based Defect Analysis * ✔ AI-Powered Software Validation * ✔ AI Workflow Automation * ✔ AI Chatbot Design & Development * ✔ AI Image Generation * ✔ AI Video Generation * ✔ AI Content Generation * ✔ AI Productivity & Business Automation * ✔ Generative AI Solutions * ✔ AI-Assisted Research & Documentation ### Data Analytics & Business Intelligence * ✔ Data Analysis * ✔ Data Cleaning & Validation * ✔ Dashboard Reporting * ✔ Excel & Google Sheets Analytics * ✔ QA Metrics & KPI Reporting * ✔ Defect Trend Analysis * ✔ Test Coverage Reporting * ✔ Business Data Insights * ✔ Data Visualization * ✔ Risk Analysis & Decision Support ### Website Development & AI Solutions * ✔ AI-Assisted Website Development * ✔ WordPress Website Development & Testing * ✔ Landing Page Development & Testing * ✔ Website Quality Assurance * ✔ Responsive Website Validation * ✔ Website Usability Testing * ✔ AI-Assisted Front-End Content Generation * ✔ Website Optimization using AI Tools ### Tools & Technologies * Selenium * REST Assured * Postman * LoadRunner * JMeter * Jira * Azure DevOps * Git * Jenkins * SQL * Python * Java * Microsoft Excel * Power BI (if applicable) * AI Productivity Tools * Generative AI Platforms ### Certifications * ✔ AI Certification – NASSCOM FutureSkills Prime * ✔ Generative AI Training & Certification * ✔ AI Prompt Engineering Training ## Why Clients Hire Me * ✔ 8+ Years of Industry Experience * ✔ AI-Driven Quality Engineering * ✔ End-to-End Software Testing * ✔ Data-Driven Problem Solving * ✔ Fast & Clear Communication * ✔ Detailed Bug Reports & Documentation * ✔ Reliable Project Delivery * ✔ Quick Turnaround Time * ✔ Business-Focused Quality Assurance * ✔ Long-Term Client Support Whether you need **software testing, mobile app testing, API automation, AI-powered QA, data analytics, AI chatbot development, AI image & video generation, website development, or AI-driven business solutions**, I am committed to delivering high-quality, reliable, and scalable results that help your business succeed.

1. Proficient in common data modeling methods 2. Skilled in using databases such as Hive, MySQL, Gbase, Doris, and StarRocks, and familiar with SQL optimization. 3. Regular communication is important to me, so let’s keep in touch.

I put AI agents into production — and tell clients which ones aren't worth running. Before an agent ships, there's a question the demo never asks: is this task worth running on an agent at all? Not "can it" — "should it," once you count the tokens, the run cost, and the margin it quietly eats every month. That's the call I make, and I'll say no when the math says no. I know agents from the inside. I designed and built the 4-agent n8n pipeline that wrote The PROMPT — an over-70,000-word published business novel. Story Architect, Ghost Writer, Redactor, Copy Editor: four specialized agents, each with one job and a quality gate. Commercially published on Amazon and valorhub.eu. So when I estimate what an implementation costs to run, it's not a guess — I build and run agent systems in production, not in slides. What I offer: → Feasibility Read (fixed-fee) — a calculated read on whether an implementation pays for its run cost, before you commit budget. Includes token math, break-even analysis, and honest recommendation to build or kill. → Agent System Build (hourly or milestone) — specialized multi-agent systems your team can actually run: content pipelines, document processing, support triage, reporting automation. Built on n8n, Claude API, OpenAI, RAG, vector DBs — or fully on-prem when the data can't leave your infrastructure. → Self-Hosted LLM Deployments — for teams that can't send data to a cloud vendor (compliance, GDPR, IP, cost). I stand up on-prem inference with Ollama, vLLM, or llama.cpp; select and quantize models (Llama, Mistral, Qwen); size the hardware; and wire it into your existing pipeline. No tokens leave your network. → Voice / TTS Pipelines — script-to-audio automation with variable-length output. ElevenLabs, Coqui TTS, XTTS, Piper. Script segmentation, SSML timing, chunked synthesis, ffmpeg mixdown. Fits voice agents, IVR, podcast automation, audiobook production, multi-lingual dubbing. → Ongoing Advisory (retainer) — the honest second opinion before you spend six figures on an AI vendor or in-house build. Recent work: • Built the internal LLM + n8n pipeline at a Munich healthcare SaaS (25M+ users) that structures unstructured partner data — 3× faster processing, 95% less onboarding effort per new source, privacy-safe with confidence gating and human-in-the-loop. • Designed the target architecture and led an on-prem → Microsoft Azure migration that cut production run cost by ~80% while preserving performance. • Shipped a commercially published 70,000-word novel written entirely by orchestrated AI agents (valorhub.eu — Chapter 1 free). Background: 13 years as a backend engineer. Senior Backend Developer at ifap (Munich) since 2019. Before that: Senior Backend at AGT International (Darmstadt), Technical Lead at V.I.Tech on a Philips Wellcentive healthcare platform. Deep Java / Spring / Postgres / Kafka / Docker / Kubernetes. Now applied to AI agent infrastructure. Stack — Cloud AI: n8n · Claude API · OpenAI API · LangGraph · RAG · Qdrant · Supabase Self-Hosted AI: Ollama · vLLM · llama.cpp · Llama / Mistral / Qwen · quantization (GGUF/AWQ) Voice / TTS: ElevenLabs · Coqui TTS · XTTS · Piper · SSML · ffmpeg Backend & Infra: Java / Spring Boot · Python · TypeScript · Postgres · Docker · Azure · GitLab CI How I work: Async-first, clear decision records, milestone-based delivery. Based in Munich (CET). English fluent, German elementary, Ukrainian native. Available ~15 hrs/week evenings and weekends — best fit for scoped project work or advisory retainers, not full-time coverage. Not a fit if: you want a yes-man who bills for demos. My value is the honest no when the math says no. If you have a workflow that feels like it should be automated but you're not sure it pays for itself — that's exactly the call I make. Send a message with what the task looks like today, what "done" looks like, and rough volume, and I'll come back with a straight answer.

Below is the quick summary of my career • Good understanding of OSGi framework. • Knowledge of Amazon Web Services, Azure , Google cloud, Rackspace. • Exposure of PaaS. • Worked on all layers of software development, web/portal, application, middleware and integration • Worked on log aggregation tools. • Knowledge of scripting ( bash , powershell , chef , puppet ). • Have worked on all kind of application deployment like java,C#,php. • Good Knowledge of Service orchestration. • Basic knowledge of server/application performance tuning. • Capable to doing Architecture diagram. • Have build teams from scratch and made productive Technical Skills  Architecture : Knowledge SOA, Restful, Model & Process Driven Architecture, OSGi framework  Amazon Cloud: EC2, EC2 container Service, S3, Glacier, Cloud Front, RDS, DynomoDB, VPC, VPN, Beanstalk, Opswork, Cloud Formation, Cloud Trail, IAM, Cloud Watch, AWS CLI, Direct Connect, AWS Import/Export, Glacier, EFS, Autoscalling, Cloud Formation Scripts, AWS Managed Instances, AWS Route 53.  Microsoft Azure : Virtual Machine & scaleset, V-NET, Azure AD, IAM, Service Fabric Clusters, Azure Cosmos DB, Azure SQL , Load Balancer, Security Center, Key-Vaults, Azure Container Services (ACS), Application Insight, Operational Insight, Recovery Services Vaults, ARM Templates, Automation Accounts, Azure CLI, Storage service , HDInsight .  Hypervisors : VMware ESXi, Xen , Oracle VirtualBox .  Desktop Services : AWS workspace , Azure Desktop.  Configuration Management Tools : Puppet, Chef, Terraform, RunDeck.  PAAS Infrastructure : openshift , Built our own PaaS POC concept.  Bigdata: Service side configuration of Hadoop, Hbase,Good Knowledge of HDFS File System  Databases Administration : Hbase, Postgresql, H2, Mysql, Oracle 10g,MsSQL, MSSQL.  Messaging : ActiveMQ, Apache Kafak , RabbitMQ , MSMQ , RocketMQ.  Service orchestration : Ubuntu juju , Docker.  Orchestration Automation: Apache Mesos, Kubernetes , Docker Swarm.  OSGI Administration : Osgi Equinox,Apache Felix,Apache Karaf,osgi cxf,Jboss Fuse.  Testing : junit ,SoapUI ,LoadUI.  CMS & DMS : Alfresco,Joomla.  Identity and Security mgmt : WSO2IS.  Log Management : Logstash,ElasticSearch,Kibana , Fluentd , Filebeat , Log4j.  Markup languages : Html ,Xml ,xslt, css  Cache : Hazelcast , Infinispan , Apache ignite.  Storage : S3 , Glacier , Azure Blob , NAS , NFS , Azure ADL , HDFS.  Version Control : GitHub, BitBucket.  Build Automation : Jenkins , TFS Build & Release , CircleCI , Azure CDCI , AWS CDCI.

I develop complex systems that drive innovation in investment management and financial technology. With 14 years of experience, I specialize in crafting high-performance solutions using Python, Java, and JavaScript/React. My journey encompasses diverse roles, from senior engineering positions at reputable financial firms to impactful contributions at dynamic start-ups. I excel in transforming ambitious ideas into scalable applications while maintaining a keen eye for quality and detail. My strong interpersonal skills and collaborative approach ensure effective communication with stakeholders at all levels. If you are looking for an engineer who can blend technical expertise with strategic insight to enhance your projects, let’s connect and explore how I can contribute to your success.