Hire the Best Apache Kafka Developers
in Bulgaria

More than 3,000 reviews on G2
Rating is 4.5 out of 5.
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Metin I.

Sofia, Bulgaria

$29/hr
5.0
71 jobs

✔️ Top-Rated Full Stack Developer on Upwork - $350K+ earned, 100% Job Success Score ✔️ 25,000+ hours delivered across long-term contracts since 2014 ✔️ 15+ years freelancing, mostly on Upwork - based in Bulgaria ✔️ Multiple 5+ year client relationships, because clients keep me when the work delivers ✔️ University graduate in IT and Automation 🚀 What I Do I'm a Senior Full Stack Developer who builds AI-powered web applications and connects systems that need to talk to each other. Most of my work falls into one of three buckets: building new platforms from scratch, integrating AI into products that already exist, or stepping in as a long-term technical partner for teams that need someone reliable. I'm not a "yes man." If I see a better way to do something, I'll tell you. If I see risks in your current approach, I'll tell you that too. Some clients love this, some don't. If you want someone to just nod and code, I'm probably not your best fit. 🤖 AI Integration & Automation - AI API Integration with OpenAI, Anthropic, and Google AI - Chatbots, document processing, and content generation pipelines - Automation workflows using n8n, MCP, and custom tooling - Adding AI features to existing platforms without breaking them 🛠️ Full Stack Development - Backend & APIs: Go, PHP/Laravel, Python/FastAPI, Node.js, REST, GraphQL - Frontend: React, Next.js, JavaScript, TypeScript, HTMX - Integrations: Shopify API, Apache Kafka, RabbitMQ - Data: MySQL, PostgreSQL, ELK - Infrastructure: Docker, Kubernetes, Linux, Prometheus, Grafana 💼 Recent Work I'm Proud Of - Open Banking infrastructure: 2 years on the backend team building UK Open Banking standard infrastructure. Conducted API conformity tests for a major US bank that played a crucial role in their CMA approval to operate in the UK market. - Logistics platform optimization: Replaced a complex Zapier-based workflow with a standalone server. Cut operational headcount from 10 managers to 1, saves a few thousand USD per month, and dramatically reduced human error. The producers, packagers, warehouse, drivers, operators, and owner are all happy with the new system. - Custom Go authentication systems, Grafana dashboards for fintech monitoring, and a number of long-term technical specialist roles where clients kept me on for 5+ years. 💬 What Clients Say "A fantastic developer, total integrity and very reliable." - Golang full stack client (1,500+ hours) "One of the best guys we worked with." - Long-term hosting and infrastructure client "This professional is very capable. He showed proper commitment and deserves special recognition for his seriousness and correctness." - Recurring enterprise client 🎯 How I Work: The 3Cs - Confidentiality: I treat your data and business with the same care as my own - Continuous Improvement: I stay curious, current, and always learning what matters - Commitment: I approach every project as if it were my own business 📩 Let's Talk If you need a senior developer who's honest about what works and what doesn't, owns the outcome, and stays for the long term, I'd be glad to chat. I usually respond within a few hours during business days.

  • Full-Stack Development
  • AI Development
  • AI Agent Development
  • AI Chatbot
  • LLM Prompt Engineering
  • OpenAI API
  • Golang
  • JavaScript
  • React
  • Next.js
  • Node.js
  • TypeScript
  • PHP
  • Laravel
  • Python
  • Automation
  • API Integration
  • n8n
  • PostgreSQL
  • MySQL
Deyan G.

Varna, Bulgaria

$35/hr
4.7
23 jobs

🚀 Key Skills & Expertise ✔️ 5+ years of professional experience delivering scalable and high-quality software ✔️ Programming Languages: Java, C# ✔️ Frameworks: Spring Boot, Spring MVC, Hibernate, JPA, Thymeleaf, Angular ✔️ Front-End: HTML5, CSS3, Bootstrap, JavaScript, Angular, AJAX, TypeScript ✔️ Databases: MySQL, PostgreSQL, MongoDB ✔️ DevOps & Cloud: Docker, Kubernetes, AWS, Apache Kafka ✔️ E-Commerce Platforms: Shopify, WordPress, OpenCart 🤝 Why Work With Me ✔️ Fluent in English, German, and Bulgarian (native) ✔️ Reliable, detail-oriented, and committed to clean, maintainable code ✔️ Excellent communication and strong focus on client satisfaction ✔️ Available, responsive, and easy to collaborate with

  • Java
  • HTML5
  • WordPress
  • JavaScript
  • CSS 3
  • PostgreSQL
  • OpenCart
  • TypeScript
  • MySQL
  • Bootstrap
  • jQuery
  • Hibernate
  • Thymeleaf
  • Spring Framework
  • Git
  • Angular
David M.

Sofia, Bulgaria

$50/hr
5.0
1 jobs

Hello! I'm an experienced Senior Software Engineer with a rich history of developing and fine-tuning software solutions across diverse sectors. My journey from an intern to a senior role has seen me delve into energy, data storage, and content management systems, each time turning challenges into opportunities. 🔍 Current Role: At SolarEdge, I serve as a Senior Java Backend Engineer, spearheading the development of a distributed monitoring system. I specialize in managing large data volumes and ensuring seamless processing through a microservices architecture. 🚀 Past Experience: - VMware: For 4 years, I played a key role in the vSAN UI team, contributing to the development of a user-friendly vSphere web client plugin while addressing backend and frontend challenges. - A-Tricks: I helped develop Sitetriks CMS, a high-performance platform built on ASP.NET Core. - Energovia: I kickstarted my career contributing to GETIX, a platform predicting energy prices using global data. 💡 Expertise: My forte lies in crafting intuitive UIs, deploying robust APIs, and orchestrating microservices to create resilient and efficient systems. I'm eager to bring my diverse skills to your projects, ensuring tailored solutions that meet your needs. Let's connect and explore the possibilities!

  • Apache Kafka
  • Java
  • C#
  • TypeScript
  • Python
  • ASP.NET Core
  • Apache Maven
  • MySQL
  • Spring Boot
  • MongoDB
  • Git
  • Apache Cassandra
  • JavaScript
  • Node.js
  • Angular

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