Aleksa Milojković Full-stack and mobile engineer building production apps with Angular, React and .NET.

Portfolio management web application for hedge fund managers to oversee their securities and orders, including ETL data extraction and FIX message processing.

• Upgraded and maintained the production application across both the Angular front end and the .NET back end.
• Built UI modules for displaying complex financial data using modern Angular capabilities (signals, RxJS).
• Developed a system for processing FIX messages.
• Created new .NET services and synchronisation scripts for updating the database.
• Collaborated directly with the client to identify their needs and requirements.
• Set the project up for AI-assisted development: wrote custom Claude Code skills, restructured the codebase with the team so Claude Code works well on it, and brought Multica into the team’s workflow.

Platform built by a four-person team for a hedge fund to track and manage ETF baskets of fixed income instruments (bonds and mortgages), replacing a manual, spreadsheet-driven process.

• Built the Angular front end, including the data views for baskets and instrument-level pricing.
• Integrated the ICE (Intercontinental Exchange) market data API and implemented the subscription layer that streams live prices to a web app and an Excel plugin in real time.
• Introduced automated OpenAPI document generation to keep the API contract in sync for consumers.
• Expanded automated test coverage for the new system and contributed to the CI/CD pipeline.
• Worked directly with the client to refine requirements around their existing trading workflow.
• Wrote the project’s CLAUDE.md and Angular skills, and worked with the team to keep the front end structured for AI-assisted maintenance and upgrades.

Authentication system replacing usernames and passwords with a distributed, zero-trust network that hides the user’s identity, enhancing security and privacy.

• Upgraded and maintained the platform, building edge services on Cloudflare Workers for worldwide coverage.
• Developed the companion mobile authenticator app in React Native.
• Built CI/CD pipelines with GitHub Actions for automated testing, deployment and package publishing.
• Created and maintained public NPM packages and defined the Git branching strategy (GitLab Flow).
• Set up and maintained AWS servers.

Web application used by passengers on Greek island cruises to browse and request guided tours at their destinations, with the available offering driven by the ship’s itinerary.

• Maintained and extended the legacy PHP/MySQL application in production, working in a team of three.
• Refactored legacy code and brought the codebase in line with the PHP version in use.
• Implemented a scheduled process driven by the ship timetable that updates the attractions database on arrival, so passengers see the tours available at the island they have docked at.
• Handled the DevOps side, including migrating the application and its services from the client’s existing provider to team-managed infrastructure on Hostinger.

Internal resource management platform for tracking employee time and project budgets, with performance analytics and a central hub for personnel data and employee responsibilities.

• Created and maintained the project, leading a small team and producing technical specifications and code documentation for onboarding developers.
• Built the React front end with TanStack Query and Tailwind, and an Express API with OpenAPI specifications, modelling the database with Sequelize.
• Implemented reporting on users and project budgets, including integrating Azure tasks into the reports.
• Created MCP servers that let AI summarise users’ daily and weekly reports and help the team generate weekly reports.
• Built the release pipelines and took product updates from ticket to production.