Hire the Best Software Architecture Freelancers
in Serbia

Hi, I'm Marko — a full-stack PHP developer with 15 years of experience building custom web applications and WordPress platforms for businesses that need more than an off-the-shelf solution. I take products from idea to launch, rebuild systems that have outgrown their original setup, and join existing codebases as the developer who stays. LARAVEL AND CUSTOM APPLICATIONS I build SaaS products and business systems with Laravel 10-12, Livewire and Filament: invoicing platforms, booking and ticketing systems, marketplaces, school management software and internal tools. That work includes payment gateways, ERP and third-party API integrations, role-based access, multi-tenancy, background job processing and reporting. I have built and still run several of my own SaaS products. That matters more than it sounds: it means I have lived with my own architectural decisions two years after launch, and I approach client work as a product with a roadmap rather than a queue of tickets. WORDPRESS AND WOOCOMMERCE Custom themes and plugins, WooCommerce customization and scaling, complex integrations, performance and security work, and rescuing sites that were built badly the first time. Recent projects include a WooCommerce store localized into 26 languages and connected to an ERP across two warehouses, a shop wired directly into factory production machines so orders reach the print queue without anyone retyping them, and a custom fiscalization gateway that issues legally compliant invoices automatically. HOW I WORK Clear scope agreed before we start, so neither of us is guessing what "done" means. Progress you can see every week. Staging environments, version control, and code your next developer will not curse me for. I write documentation. I ask questions before I assume. I do not disappear. I am based in Serbia (CET), fluent in English, and available more than 30 hours per week. I work with clients across Europe, the US and the Middle East. If you are looking for someone to take ownership of a project rather than close tickets, send me a message and tell me what you are building.

Senior Product Designer with 8+ years in high-complexity B2B SaaS and a 𝗣𝗵𝗗 𝗶𝗻 𝗖𝗼𝗺𝗽𝘂𝘁𝗲𝗿 𝗦𝗰𝗶𝗲𝗻𝗰𝗲 (Distributed Systems, University of York, published at SC'23). I design from the data model up, not the screen down: my background is software engineering, so I understand database schemas, API structures, and system architecture - and my designs hold up when engineers implement them. 𝗪𝗵𝗮𝘁 𝗜 𝗱𝗼: - Enterprise product design → multi-role systems, compliance-heavy workflows, legacy modernization - Design systems at scale → most recent: 58 component sets, 6,880 variants in 3 months, published as an npm library with Storybook documentation - Sole-designer ownership → 0-to-1 from data model to shipped screens - Complex domains → ERP, logistics, circular commerce, document workflows 𝗥𝗲𝗰𝗲𝗻𝘁 𝘄𝗼𝗿𝗸: - SpecTec Middle East (maritime ERP) → unified crew management across 3 applications and 11 React sub-projects; adopted on 44 vessels for 2,000+ crew, replacing spreadsheet coordination - Okret (circular fashion SaaS) → sole designer, B2C mobile + B2B operations platform; first campaign: 2,551 validated takebacks, 39% account conversion; second campaign launched with near-zero support volume - Duxre (CRE SaaS + AI) → Design Lead; design system from scratch, React migration delivering 3 modules in 5 months - United Nations (gDoc 2.0) → unified global document workflow system, ~10,000 users 𝗛𝗼𝘄 𝗜 𝘄𝗼𝗿𝗸: Directly with founders, PMs, and engineers. I'm comfortable in the technical layer - schemas, API structures, system constraints - so my designs account for how things will actually be built, and handoff doesn't need reinterpretation. I'll push back on scope that creates technical debt. 𝗔𝘃𝗮𝗶𝗹𝗮𝗯𝗶𝗹𝗶𝘁𝘆: 20–25h/week 𝗣𝗼𝗿𝘁𝗳𝗼𝗹𝗶𝗼: amarkovic.me

I'm building scalable end-to-end AI solutions through strong distributed ML pipelines. 🤖🔗 My team and I successfully CREATED AND DESIGNED 5 end-to-end ML systems for TOP US CLIENTS, resulting in approximately ~20MIL IN INVESTMENTS. I really enjoy training large deep neural networks and developing AI solutions that can transform your data into the 💵. my AI Stack: - PyTorch for neural nets ( Familiar with Tensorflow as well ) - Dask / Ray - LangGraph / Pydantic AI - Databricks/Spark - HuggingFace - MLflow/DVC for ML project lifecycle ( open-source solution ) - minIO - Docker, k8s, CICD - Terraform & Pulumi - Software Architecture and System Design

Software Architect | Senior .NET + Angular Engineer | Azure Expert I am a Senior Software Engineer and Software Architect with more than 10 years of experience delivering enterprise systems for companies such as SAP, FIS, Arcadis, and Microsoft. I specialize in designing scalable architectures, building high-performance backend systems, and creating modern frontend applications using .NET and Angular. ⭐ Technical Expertise 🔥 Backend & Architecture • C# • .NET Core / .NET Framework • ASP.NET Web API / MVC • SQL Server, T-SQL, Entity Framework, LINQ • Microservices, Clean Architecture, Event-Driven systems • REST APIs, Integrations, Distributed systems • RabbitMQ, Azure Service Bus ⚡ Frontend • Angular 2+ • TypeScript, RxJS • Tailwind, PrimeNG • React (secondary) ☁️ Cloud & DevOps • Azure Functions, APIM, App Service, Storage, Queues • AWS (selected services) • CI/CD: Azure DevOps, GitHub Actions • Docker, Kubernetes 🚀 What I Deliver 💡 Scalable backend architecture 🔐 Secure, fast, clean REST APIs 🏗 Enterprise-grade .NET systems 🧹 Maintainable, production-ready code 🌐 Full-stack development with Angular ☁️ Cloud-based distributed solutions 🕒 On-time delivery & clear communication 🤝 Why Clients Work With Me 🎯 Strong architectural thinking 🧠 Excellent problem-solving skills 💬 Professional communication 🏢 Deep enterprise experience 🔁 Reliable long-term collaboration If you need a Senior .NET & Angular engineer or a Software Architect who can take ownership of your system design and development — let's work together.

System and Software Architect with over two decades of extensive experience in software development, system architecture, and project management. Have a proven track record of delivering complex and high-impact projects across various industries, including airfreight, trucking, agriculture, and telecommunications.

I am a senior software developer/architect with over 15 years of professional experience. I bring deep expertise in building and delivering complex systems, ranging from back-office applications to real-time processing of high-volume data. I have built and maintained distributed systems across various domains, like fintech, iGaming, data privacy, IoT and large online marketplaces. I use AI coding tools (mostly Codex and Claude Code so far) all the time and find them very effective for accelerating development. Furthermore, I worked on integrating LLMs into an open-source coding assistant, which gave me practical familiarity not only with using AI-powered development tools, but also with how these tools work internally (context selection, orchestration of sub-agents, tools integration, MCP, etc). I look forward to the possibility of discussing how my background fits your current needs.