Hire the Best .NET Framework C# Engineers
in Bosnia and Herzegovina

Hi, I’m Dejan Keserović, a Senior Full-Stack Software Developer with 5+ years of experience building scalable, high-performing web applications. I’ve worked on a wide range of projects, from high-scale enterprise systems to personal side projects, helping businesses improve their software and streamline processes. I handle both frontend and backend development and take pride in managing projects from start to finish, ensuring smooth and efficient execution. I also have a strong background in database design, with research experience that’s given me a deep understanding of how to structure and optimize databases for large and complex systems. I’ve published several scientific papers on the topic and was also a speaker at the International Conference on Information Systems Development (ISD) 2025. My key skills and technologies include: • Java, Java/JEE, Spring Boot, Spring Framework (MVC, Security, Data) • Maven, Gradle • .NET, C# • React, TypeScript, HTML, CSS • SQL databases: MySQL, MSSQL, Oracle, PostgreSQL • REST API development and integration • Writing clean, efficient, and well-tested code • Project design, testing, deployment, and maintenance • Strong communication and collaboration I’m looking forward to working together!

⭐⭐⭐⭐⭐ 30+ successful Angular & .NET projects delivered via Upwork and direct enterprise contracts. I help companies architect, build and optimize enterprise apps that scale. Over the past 8+ years, I’ve worked on SaaS, fintech, healthcare, logistics, ESG, blockchain and enterprise platforms, building clean frontends, strong backends, and full systems that are fast and maintainable. I’m strongest when a project needs both hands on development and senior level architecture thinking. My core stack is Angular, TypeScript, C#, ASP.NET Core, SQL, Entity Framework, REST APIs, and modern cloud based development workflows. I also work with NgRx, Signals, RxJS, SSR/SSG, microfrontends, Nx monorepos, PostgreSQL, MongoDB, Redis, SignalR, Stripe, and role based enterprise systems. 💡 Clients usually bring me in when they need one of these: - a senior engineer to build a product properly from the start - an existing app that has become slow, messy, or hard to maintain - a strong Angular frontend paired with a reliable .NET backend - better architecture, cleaner state management, and more scalable code - someone who can turn Figma designs into polished, reusable components - performance, SEO, SSR, database, or API optimization 💡What you can expect from working with me: - clean, maintainable code - strong communication and reliable delivery - architecture decisions that make sense long term - attention to performance, structure, and code quality - someone comfortable working solo or with an existing team I’ve worked on large scale business applications, multi role dashboards, admin systems, real-time features, payment flows, and enterprise products where stability and code quality matter. 👉 If you need a senior engineer who can both build and think through the bigger technical picture, feel free to reach out.

Software engineer with demonstrated ability to build secure, scalable, resilient, efficient, and fault-tolerant solutions based on customer requirements. Throughout his professional journey, he gained valuable expertise in both team-based projects and individual undertakings. ✓ AWS Cloud ✓ AWS SNS ✓ AWS SQS ✓ AWS Lambda Functions ✓ AWS S3 ✓ AWS Cognito ✓ AWS API Gateway ✓ AWS ELB ✓ AWS ASG ✓ AWS DynamoDB ✓ C# ✓ .NET / .NET Core ✓ ASP.NET WebForms ✓ ASP.NET MVC / Web API ✓ ASP.NET Core ✓ Rest API design, architecture, and implementation ✓ Relational database architecture and optimization(Microsoft SQL, PostgreSQL, MySQL) ✓ SQL Programming ✓ Entity Framework (DB-first and Code-first) and Entity Framework Core ✓ Redis ✓ LINQ ✓ Microservices ✓ CQRS ✓ Clean Architecture ✓ SOLID ✓ MassTransit ✓ RabbitMQ ✓ SignalR ✓ Hangfire ✓ Serilog/Seq ✓ Kibana ✓ ElasticSearch ✓ Dapper ✓ Postman ✓ Swagger ✓ NUnit, XUnit ✓ GIT (Github, Bitbucket) ✓ SFTP, FTPS ✓ JavaScript ✓ jQuery ✓ React ✓ CSS, Bootstrap ✓ Agile ✓ Scrum ✓ Jira

Developer with 2 years of experience, with focus on different technologies, and connection with different services (CRM, warehouses, Google Cloud Application...). Responsible for development and maintenance of plugins, API services and applications. Possessing skills required for frontend and backend development.

Hi! My name is Kenan and I am Senior Software Engineer with more than 15 years of experience specializing in full-stack development, web technologies, and mobile applications. My diverse skill set and deep technical knowledge allow me to deliver comprehensive, high-quality solutions that drive your projects forward. Why Choose Me: With a proven track record in delivering successful projects across web and mobile platforms, I bring a lot of experience and a results-oriented mindset to every project. My dedication to quality, combined with a passion for tech, makes me a reliable partner for achieving your project goals. Let’s connect to discuss how I can leverage my expertise to bring your project to life. I’m excited to explore how we can work together!

I’m a backend-focused software engineer specializing in C# and the .NET ecosystem, helping clients build, fix, and integrate production systems with reliability and speed. My core work centers on ASP.NET Core–based backend services, Web APIs, and business logic. I’m often brought in to resolve urgent issues, stabilize existing systems, upgrade .NET applications, or integrate new functionality into established codebases. Recent projects include fixing production problems, upgrading .NET versions, and delivering clean solutions under tight timelines. Primary focus areas - C# development and ASP.NET Core Web APIs - Backend services, refactoring, and system stabilization - SQL Server and data-driven workflows - System integrations, webhooks, and third-party APIs - Backend automation and process optimization On the frontend side, I work with Angular for internal dashboards and business tools, and I’m expanding my use of modern JavaScript frameworks (such as React & Vue) to deliver clean, API-driven admin interfaces when a UI layer is required. I’m comfortable working independently, communicating clearly, and taking responsibility for backend-heavy tasks where clients need dependable results rather than experimentation.