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I'm Julia from Koitechs - I can help you hire an in-house AI driven React developer, full stack Next.js developer, full stack React developer, wordpress developer , front end developer or mobile app developer who can join your team seamlessly and start delivering from day one. Koitechs provides CTO-approved engineers for AI Development, AI App Development, AI Agent Development, AI Chatbot, Chatbot Development, Web Development, web design , Full-Stack Development, Automation, and modern React-based product development. Our team has strong experience across Artificial Intelligence, Generative AI, OpenAI API, LLM Prompt Engineering, Natural Language Processing, AI Model Integration, AI Model Development, AI Platform, API Integration, API, Data Analysis, Data Science, Web Scraping, Multimodal Large Language Model, and scalable web/mobile applications. We work with products in Travel & Hospitality, Real Estate, AI SaaS, Gaming, Logistics, FinTech, E-commerce, Healthcare, PropTech, EdTech, MarTech, and Marketplaces. We help clients launch AI MVPs faster, integrate intelligent workflows into existing products, and scale platforms to millions of users with our React developer, Next.js developer, Supabase expert, and full stack developer team. Our developers are not freelancers - every web developer, react developer, mobile app developer, and full stack developer is an in-house, validated, CTO-approved specialist. Depending on your project needs, we can provide experts in React.js, Next.js, Node.js, TypeScript, JavaScript, Python, Supabase, Firebase, drizzle, SQL, Tailwind CSS, shadcn/ui, and AI integrations. For frontend-heavy products, we provide react developer, react developer, Next.js, Tailwind CSS, TypeScript, shadcn/ui, and scalable frontend architecture. For cross-platform mobile, our core stack is React Native instead of flutter, but we can support products where a mobile app developer needs to work closely with backend, AI, and web teams. We can also support projects involving wordpress, vue, angular, laravel, or legacy systems when AI and React need to be integrated into an existing product. 🛠 Skills & Tech AI skills, AI Development, AI Chatbot, AI Agent Development, AI App Development, AI Model Integration, AI Model Development, AI Platform, Chatbot, Chatbot Development, Generative AI, OpenAI API, LLM Prompt Engineering, Natural Language Processing, Automation, Deep Learning, TensorFlow, Python, Data Science, Data Analysis, Web Scraping, Multimodal Large Language Model. React developer, React web development, React.js, Next.js, Node.js, TypeScript, JavaScript, JavaScript ES6+, Tailwind CSS, shadcn/ui, Redux, Redux Toolkit, Supabase, SQL, drizzle, Firebase, pocketbase, Prisma, PostgreSQL, MongoDB, API Integration, API, REST API, GraphQL, Vercel, AWS, Docker, SaaS Development, Agile, Git, WebSockets, Storybook, Jest, Cypress. We also have experience with wordpress, vue, angular, flutter, laravel, and mixed-stack product environments. 📌 Processes Agile / Scrum with daily standups CI/CD pipelines and Git Flow AI-first discovery and technical planning Pixel-perfect Figma → React / Next.js conversion Code reviews, automated tests, and scalable architecture Modular feature rollout with API-first design Secure OpenAI API and third-party API Integration Prompt testing, AI workflow validation, and production hardening ⚡ What Our React Developer / AI Developer Can Build AI MVPs and AI SaaS platforms AI Chatbot and Chatbot Development for customer support, sales, and internal teams AI Agent Development for business workflow Automation AI App Development with React, Next.js, Supabase, Firebase, and OpenAI API Internal AI copilots for documents, CRM, operations, and support Interactive dashboards for analytics, logistics, BI SaaS, and AI insights Real-time data apps with WebSockets, maps, chat, and streaming E-commerce flows with Stripe, Twilio, checkout, and subscriptions Authentication and multi-role authorization Custom admin panels, CMS, CRMs, and AI Platform interfaces Pixel-perfect UI with Tailwind CSS, shadcn/ui, and Material UI Performance optimization for Core Web Vitals and Lighthouse Web Scraping, Data Analysis, and AI Model Integration workflows flutter developer , android developer 📈 Why Koitechs In-house only React developer team: no freelancers, no ghosting CTO-approved AI Development and Web Development specialists 75% repeat clients From 1 react native developer , python developer or scala developer to a full stack team with QA & PM 48-hour matching + 2-week trial period Transparent communication, daily syncs, and predictable delivery Strong experience with AI MVP, AI Chatbot, AI Agent Development, React, Next.js, Supabase , mern ,

👋 Hello! Senior Java Developer, Team Lead & Architect with 10+ years of hands-on experience with 10+ years of hands-on experience building scalable, high-load web and mobile applications. I mainly work with Java backend, JavaScript, TypeScript, Oracle, Postgres databases. My core backend work is centered on Spring Boot, focusing on API development and production-grade RESTful services backed by PostgreSQL. My focus is on backend software architecture, ensuring scalability, clean boundaries, and long-term maintainability. ✔️ Ready-to-Use Integrations I can accelerate your product using proven, production-ready integrations: 🚀 AI & LLMs: ChatGPT, LLaMA, Mistral (text, images, vision, automation) 🚀 Payments: Stripe (card payments & transfers) 🚀 Voice & Media: ElevenLabs (speech & voice AI) 🚀 Communication: Zoom (voice & video integrations) My Specialization: ✅ Backend & Architecture: Java (10+ years): modern Java (Lambdas, Streams, Date/Time API), Spring (9+ years): Spring Boot, Spring Data, Spring Cloud for microservices and distributed systems, and Java EE: REST APIs, SOAP, JPA, third-party integrations ✅ Security & Frameworks: Keycloak with OAuth2 and JWT-based authentication, JHipster, Swagger, Liquibase, Axon, Vaadin, ORM: Hibernate, Blaze-Persistence ✅ Databases & Messaging: SQL (10+ years): PostgreSQL, MySQL, MariaDB, Oracle, NoSQL: MongoDB, Redis, Hazelcast, Messaging: Kafka, ActiveMQ, RabbitMQ, Zookeeper, Firebase Messaging ✅ DevOps & Observability: CI/CD: Jenkins, Docker, Kubernetes, ELK Stack (Logstash, Elasticsearch, Kibana) ✅ Quality & Delivery: Testing: JUnit, Mockito, Spring Test, Unit & Integration testing, Full SDLC, code reviews, refactoring, clean architecture 💡 Let’s discuss how I can help you build a reliable, scalable solution!

❇️ Experienced Software Engineer (TS, Java, Scala) ❇️ Technical Leader ❇️ Expert in Enterprise Web Apps, Microservices, Serverless, Full-stack, Functional programming

I am a seasoned software developer with over 10 years of experience specializing in Backend and Full-Stack development. I pride myself on my excellent problem-solving skills and have a strong passion for writing clean and testable code. Clear communication is one of my strengths, making me a valuable team member in any software development project. Preferred Tech Stack: Backend: Java, Spring Boot, Thymeleaf, REST API, PostgreSQL, AWS, Linux, Tomcat, Nginx Frontend (Web): HTML, CSS, Sass, Javascript Frontend (Mobile): Flutter, Dart Cross-Platform: Flutter, Dart I am also proficient in the following technologies: Languages: Java, Scala, Groovy, Kotlin, Golang, JavaScript, TypeScript, Python, Dart, SQL Databases: PostgreSQL, MySQL, Oracle, Cassandra, MongoDB, SQLite, Neo4j Frameworks (Backend): Spring Boot, Spring Security, OpenAPI, Kafka, Zookeeper, Grails Frameworks (Frontend): Angular, React, Flutter, jQuery, Bootstrap Security: Spring Security, OAuth, JWT Technologies: HTML, CSS, JSON, XML, REST API API: REST API, OpenAPI, Swagger Messaging: Kafka, ActiveMQ, RabbitMQ Search: ElasticSearch, Lucene, Kibana Logging: ElasticSearch, Logstash, Kibana Cloud Providers: AWS, Google Cloud Testing: JUnit, Mockito, TestNG, Selenium, Cucumber, Katalon Studio Development Tools: Intellij IDEA, VSCode, Android Studio

Building data systems that don't just work—they perform at scale. With over 15 years of experience, I bridge the gap between complex data engineering and business-critical insights. Whether you are dealing with 200k+ RPS high-load environments or building a Modern Data Lakehouse from scratch, I architect solutions that are cost-effective and future-proof. What I bring to your project: - High-Scale/High-Load Expertise: Proven track record in building real-time pipelines (Flink, Spark, Kafka) that handle massive throughput with sub-second latency. - Modern Lakehouse Architecture: Specialist in implementing Delta, Hudi, and Iceberg to provide ACID transactions on top of scalable cloud storage. - Performance OLAP: Deep expertise in ultra-fast query layers using StarRocks, ClickHouse, and SingleStore to slash BI dashboard wait times. - Enterprise Governance: Deploying OpenMetadata and dbt to ensure your data is clean, documented, and ready for LLM/AI applications. 🛠️ Tech Stack & Ecosystems - Processing & Streaming: Apache Flink, Spark, Kafka (Streams/Connect), NiFi, Polars. - Lakehouse & Storage: Hudi, Iceberg, Delta Lake, Databricks, Apache Hadoop. - High-Performance DBs: StarRocks, ClickHouse, Vertica, SingleStore, Oracle. - Cloud & Orchestration: AWS, GCP, Azure, Kubernetes (K8s), Airflow, Prefect. - Analytics Engineering: dbt, BigQuery, CRM/Ads Integration, Medallion Architecture. Why work with me? I don't just "install" tools. I design systems that optimize for Compute Cost (FinOps) and Data Reliability. If your current infrastructure is lagging or your cloud bills are spiraling, I can audit your stack and implement a high-performance alternative. Ready to scale? Let’s talk about your data architecture.

⭐⭐⭐⭐⭐"Mykyta has exceptional characteristics both in hard and soft skills. He took a part in complex software development projects as a part of a large mixed group. The feedback from our customers and team is always positive." ⭐I'm the highest-rated and highest-earning Java & Groovy freelancer on Upwork with numerous 5-star reviews, including overly positive feedback. ⭐ I've developed different custom specific software using modern java & groovy software using microservice and monolithic architecture, improved performance, refactored and tested in next business domains: ✅ Utilities ✅ Fintech ✅ Auto ✅ Security ✅ Cryptocurrency ✅✅✅ Brief information about me! ✅✅✅ ✅ Senior Java & Groovy Software Engineer ✅ Specializing in back-end development | Cloud Integrations (AWS, GCP, Azure) ✅ I have over 6.5+ years of experience in Java development ✅ Experienced both in developing software from scratch and maintaining large existing projects ✅ I have hands-on experience in developing back-end web services with micro-service or monolith architecture using Java technology stack, including modern cloud-based solutions. 🌟 WHY YOU SHOULD CHOOSE ME OVER OTHERS? 🌟 ✅ Clients' feedback: I am concentrating on giving VALUE and bringing SUCCESS to all of my customers, earning their TRUST and helping them to EARN MONEY. ALL customers' feedback on my Profile is extremely important to me and proves the value that I provide. ✅ Responsiveness: Communication is extremely important as a part of every business ever existed, and once it is fast and clear, it may lead to awesome results, that's why I tend to be available for my customers in no time, reply fast and clear, as well as I try to be fair, understanding and responsive. ✅ Kindness and Empathy: My main personal principles that I implement in every facet of my life. Treating everyone with respect, aiming to understand the whole situation or problem to solve the pain of my client, and constantly work to IMPROVE the client's product. 🙋🏼‍♂️I am eager to work with you, to provide high-quality code, reliable, consistent solutions, solve your problems and bring success to your business. Contact me, and we will discuss how we can work together to FULLY meet your Business Needs, follow your business rules, and bring you success. A big area of expertise: - REST API design and development - Horizontally scalable and highly available systems - Automating development workflows and deployment pipelines - Micro-service design and development - Design and development of decentralized applications (DApps) - Monitoring, log aggregation - Java and Groovy development - Service-Oriented architecture - Spring Framework (including cloud-based stack) - Experience in NoSQL Development (MongoDB, Neo4j) - Performance and Scalability Optimization Huge Skills & Technologies set: - Java/Groovy - AWS - Linux (with distributives) - Jenkins, CircleCI, Rundeck, Rancher - Docker - MySQL, Postgres - Redis, MongoDB, Neo4j. - RabbitMQ, ActiveMQ, SQS, RabbitMQ