
Sanel Osmanovic
Verified Expert in Engineering
Software Developer
Jacksonville, FL, United States
Toptal member since July 18, 2025
Sanel is a software engineer with 8+ years of experience building modern, enterprise web apps. He specializes in front-end development with React, creating intuitive, high-performance user interfaces. Sanel also has deep expertise in JavaScript and UI architecture, with a strong focus on scalable, user-centered design.
Portfolio
Experience
- APIs - 10 years
- HTML - 10 years
- CSS - 10 years
- React - 9 years
- JavaScript - 9 years
- Node.js - 5 years
- TypeScript - 3 years
- Tailwind UI - 2 years
Preferred Environment
MacOS, Visual Studio Code (VS Code), Chrome, Claude, Artificial Intelligence (AI), Consulting, Claude Code, Vibe Coding, Training, Large Language Models (LLMs)
The most amazing...
...application I've developed helped reduce load speeds by over 95% while providing a modern, easy to use UI for users to search data.
Work Experience
Senior Software Engineer, AI Innovation
Yahoo
- Embedded on Yahoo's internal AI innovation incubation team, prototyping and productionizing LLM-powered features across consumer products with 90+ million monthly active users in a fast-moving applied-research role.
- Designed full-stack AI experiences in React, TypeScript, and Node.js, including real-time streaming UIs over server-sent events for seamless LLM response delivery.
- Evaluated and integrated emerging LLM frameworks and protocols (LangChain, OpenAI Assistants API, Anthropic Claude, MCP) to compress prototype-to-production cycles and raise team velocity.
Software Engineer IV
Availity
- Directed front-end architecture for core healthcare workflow applications (enrollment, eligibility, claims) serving 2+ million healthcare providers, backed by relational data stores and complex RESTful payer integrations.
- Spearheaded the rebuild of the enrollment UI from legacy Angular to a modern React/TypeScript SPA, cutting page load times 40% and improving provider onboarding.
- Mentored junior and mid-level engineers and led code reviews and engineering best practices while safely handling HIPAA-regulated PHI across distributed teams.
Software Engineer I-III
Availity
- Executed a full migration of legacy jQuery/Angular applications to a React/Webpack SPA architecture, eliminating years of accumulated technical debt.
- Established CI/CD pipelines using Jenkins and Bitbucket, along with automated test coverage, cutting deployment cycles from hours to minutes.
- Built and maintained consumer-facing web application features using JavaScript, jQuery, and Angular within a fast-paced healthcare technology environment.
Experience
Payer List UI
Through performance optimizations, I reduced page load times by over 90%. I also contributed feature enhancements, suggested UX improvements, and maintained the application post-launch to ensure ongoing stability and performance.
AirTrace
https://airtrace.appArchitop
https://architop.coOne Day Agents
https://onedayagents.comSkills
Libraries/APIs
React, REST APIs, Node.js, jQuery
Tools
Webpack, Claude, Claude Code, Jenkins
Languages
JavaScript, HTML, CSS, TypeScript, Java, ECMAScript (ES6)
Frameworks
Chrome, Bootstrap, Next.js, Express.js, Redux, Angular
Paradigms
Responsive Web Design (RWD), Model Context Protocol (MCP)
Platforms
MacOS, Visual Studio Code (VS Code)
Industry Expertise
E-learning
Storage
PostgreSQL
Other
Web Development, User Experience (UX), User Interface (UI), Front-end, Artificial Intelligence (AI), Consulting, Vibe Coding, Tailwind UI, APIs, Cursor AI, Training, Large Language Models (LLMs), LangChain, Prompt Engineering, Agentic Coding, AI Voice Agents, LLM Agents
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