Hussain — Backend Development freelancer in Sarajevo

You need a team that can build the whole product - not just one piece of it. We’re SparkTech, a full-service software engineering team with expertise across web, mobile, AI, and cloud infrastructure. Whether you’re launching an MVP, scaling a platform, or integrating cutting-edge AI into your product, we’ve done it, and we can do it for you. Web Development Full-stack web applications built to scale. We work across the entire stack: • Backend: Java (Spring Boot), C# (.NET), Python, Node.js, Go • Frontend: React, Next.js, Angular, JavaScript • Databases: PostgreSQL, MySQL, Redis Mobile Development Native-quality apps for iOS and Android, built with modern cross-platform tools: • Flutter - single codebase, native performance • React Native - JavaScript-powered, fast to market AI & Machine Learning From intelligent agents to production ML pipelines: • AI Agents and autonomous workflows • LangChain & LangGraph for LLM orchestration • OpenAI, Gemini, and custom model integrations • Python-based ML pipelines and data processing DevOps & Cloud Infrastructure We don’t just build, we deploy, scale, and maintain: • AWS, Azure, and Google Cloud • Docker & Kubernetes for containerised deployments • CI\u002FCD pipelines, monitoring, and infrastructure as code Why Clients Choose SparkTech: • 100% Job Success Score on Upwork • 5.0 ★ client review: “SparkTech delivered excellent technical results with great attention to detail” • End-to-end delivery - from architecture to production • Clear communication, no surprises, on-time delivery • Flexible on fixed-price or hourly contracts Ready to build? Send us a message - we typically respond within a few hours.