SP

SAŠA PAJIĆ

Available to hire

Hi, I'm Sasa, a Full Stack Web Developer based in Valencia, Spain. I specialize in building SaaS platforms end-to-end, including user authentication, API integration, PDF reporting, and responsive web apps.

About

Hi, I’m Sasa, a Full Stack Web Developer based in Valencia, Spain. I specialize in building SaaS platforms end-to-end, including user authentication, API integration, PDF reporting, and responsive web apps. I love crafting mobile-first interfaces and scalable backends with Next.js, React, and FastAPI.

Over the last 3 years, I shipped production platforms serving ~18,000 users, built admin dashboards, AI-powered analysis features, and automated reporting, and I always strive for clean documentation and handover-ready code.

  • 3 years' experience
  • Joined March 2026

Industry experience

  • Software & Internet
  • Professional Services
  • Media & Entertainment

More experts in Valencia, Spain

Work experience

Full Stack Web Developer · Pragmatic Labs AIMar 2025 – Present · 1 yr 9 mos

Built and launched a SaaS platform (S.A.F.E.T.Y.™) serving ~18,000 users with user registration, authentication, and role-based access; implemented automated PDF report generation and asynchronous email delivery; optimized database operations and admin dashboards, reducing load times by 95% with sub-5ms query responses; delivered a mobile-first, responsive UI across desktop and mobile with Vite-optimized production bundles.

Full Stack Developer · TotemaMay 2024 – Feb 2025 · 10 mos

Built a FastAPI REST API with token-based authentication serving 20 endpoints for AI-powered data processing; integrated third-party AI APIs (OpenAI GPT, Anthropic Claude) via LangChain for document extraction and analysis; designed and developed a data-driven advisory platform enabling recruiters to process hundreds of CVs per cycle.

Web Developer & Designer · FreelanceFeb 2023 – Jan 2024 · 1 yr

Developed reusable, responsive UI components using HTML, SCSS, TypeScript, and Angular for GitWorks - an open platform for collaborative model-based engineering; built accessible design system components using Angular Material, ensuring consistent user experience across devices.

Education

Bachelor's degree in Computer Science and Automation · Faculty of Technical Sciences, University of Novi Sad2016 – 2022

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