Mudafar E. — Software Engineer

I architect high-velocity web experiences that convert users and protect revenue. With 8+ years leading frontend transformations at Expedia Group (SDE) and ICE Mortgage Technology (React Engineer), I specialize in turning performance bottlenecks into competitive advantages through: - Core Web Vitals mastery: Slashed LCP by 4s at Expedia Group during 2023's multi-billion-dollar platform unification and travel surge - React / JavaScript / TypeScript innovation: Built ICE's digital mortgage industry document viewer (80% faster than Adobe) eliminating a major bottleneck in the nation's loan processing pipeline. - Business-aligned optimization: Protected $2.3M revenue via CWV (Core Web Vital) improvements My work bridges technical excellence and measurable outcomes—proven through 6,500+ daily mortgage reviews enabled by my solutions and 15% higher mobile conversions at Expedia Group Platform. I thrive on mentoring teams to build data-driven performance-first cultures. CORE STRENGTHS & TECHNOLOGIES PERFORMANCE ARCHITECTURE Core Web Vitals ( LCP / INP / CLS ) · Lighthouse · Chrome DevTools · DataDog RUM · React Streaming SSR · Webpack FRONTEND ENGINEERING React 18 · TypeScript · Redux · GraphQL · Micro Frontends · Virtualization · JavaScript (ES6+) · HTML5 · CSS3 · GraphQL STATE MANAGEMENT & ARCHITECTURE Redux · Redux Thunk · virtualization · SSR server-side rendering · CSR client-side rendering · CI/CD · unit testing (Jest, React Testing Library) BUSINESS IMPACT TOOLS A/B Testing · CRUX Analysis · KPI Optimization · GitHub Copilot · Agile · Scrum LEADERSHIP AND MENTORSHIP Technical coaching · code reviews · team building · knowledge sharing

Stackforce AI infers this person is a Frontend Engineer specializing in Performance Optimization within Fintech and Travel Technology.

Location: Austin, Texas, United States

Experience: 9 yrs 8 mos

Skills

Performance Architecture
Frontend Engineering
Performance Optimization
Teaching
Full Stack Development

Career Highlights

Achieved 4s reduction in Largest Contentful Paint.
Enabled 10K+ daily remote signings during COVID-19.
Mentored teams to build performance-first cultures.

Work Experience

Bluehawk Consulting

Sr. Software Development Engineer @ Expedia Group (2 yrs 9 mos)

4Geeks Academy

Lead full stack Instructor (1 mo)

Leniolabs_ LLC

React Engineer @ ICE Mortgage Technology (3 yrs 11 mos)

Ignis Gravitas

Full Stack Engineer (1 yr 6 mos)

Universidad de los Andes (VE)

Undergraduate Teaching Assistant (9 mos)

Education

Bachelor of Engineering - BE at Universidad de los Andes (VE)

Certificate at Midwestern Career College

Certificate at Canada College Of Education

Mudafar E.

Software Engineer

Austin, Texas, United States9 yrs 8 mos experience

AI ML PractitionerAI Enabled

Key Highlights

Achieved 4s reduction in Largest Contentful Paint.
Enabled 10K+ daily remote signings during COVID-19.
Mentored teams to build performance-first cultures.

Stackforce AI infers this person is a Frontend Engineer specializing in Performance Optimization within Fintech and Travel Technology.

Contact

Skills

Core Skills

Performance ArchitectureFrontend EngineeringPerformance OptimizationTeachingFull Stack Development

Other Skills

Core Web VitalsReact Streaming SSRGraphQLDataDog RUMLighthouseChrome DevToolsA/B TestingReactJavaScriptTypeScriptUnit TestingWeb PerformanceWCAG ComplianceWCAG best practicesVirtualization

About

Experience

9 yrs 8 mos

Total Experience

2 yrs 5 mos

Average Tenure

Current Experience

Bluehawk consulting

Sr. Software Development Engineer @ Expedia Group

Aug 2022 – May 2025 · 2 yrs 9 mos · Houston, TX · Hybrid

Recruited to Lead Performance for Expedia’s Global Brand Unification (Expedia, Hotels.com, Vrbo): Slashed LCP by 4s (6.9s → 2.9s), Protected $2.3M+ in Peak Revenue, and Cut Mobile Bounce Rate by 15% Amid Post-Pandemic Travel Surge
Problem:
During the 2023 travel surge, Expedia's experienced 8s load delays and layout instability, impacting 6.4 million daily users. Risking $2.3M+ during critical booking periods.
Action:
Led a deep-dive performance audit, using RUM and Chrome DevTools to pinpoint bottlenecks.
Architected React Streaming SSR for priority hydration (Q4 2022).
Implemented GraphQL persisted queries, cutting payloads by 40%.
Led DataDog RUM integration for real-time CWV monitoring.
Result:
✅ 4s LCP reduction (6.9s → 2.9s) - towards Google's 2.5s good LCP threshold.
✅ 15% lower mobile bounce rate, protecting revenue.
✅ 10% cloud cost reduction.
Problem:
As platform adoption grew, inconsistent performance practices led to regressions (e.g., 8s LCP delays). Scaling a performance-first culture across engineering became critical to maintain UX and revenue.
Action:
Mentored a pod of 3 junior developers over 6 months, focusing on: Performance profiling, Modern React patterns, Core Web Vitals optimization and WCAG / a11y compliant.
Created performance playbooks with: Audit checklists, anti-patterns, A/B test guidance.
Partnered with DevOps to add: Lighthouse CI gates, Performance budgets.
Result:
✅ Pod independently shipped 4 performance fixes within 6 months.
✅ 62% reduction in production performance-related regression tickets.
✅ 40% of performance regression prevented, before even affecting travelers.

Core Web VitalsReact Streaming SSRGraphQLDataDog RUMLighthouseChrome DevTools+4

4geeks academy

Lead full stack Instructor

Mar 2019 – Apr 2019 · 1 mo · Santiago Province, Chile · On-site

Lead Coding Bootcamp Instructor | 85% Job Placement Rate | React.js & Python Curriculum Developer
Instructional Leadership
Directed a 12-week intensive coding bootcamp for 30+ aspiring developers
Supervised 2 assistant instructors while teaching 80+ hours of technical curriculum
Developed project-based learning materials covering:
✓ Modern JavaScript (ES6+)
✓ React.js fundamentals
✓ Python/Flask backend development
✓ REST API design
Key Achievements
✅ 100% completion rate - All students graduated and built portfolio projects
✅ 85% job placement within 3 months post-graduation (exceeded academy average)
✅ Created 15+ hands-on labs still used in curriculum today
✅ Mentored students who later joined companies like MercadoLibre and Globant
Teaching Methodology
Implemented flipped classroom techniques increasing engagement by 40%
Focused on practical skills:
Code reviews
Pair programming
Agile workflow simulation
Integrated real-world tools:
Git/GitHub · Trello · Chrome DevTools

React.jsJavaScriptPythonTeachingCurriculum Development

Leniolabs_ llc

React Engineer @ ICE Mortgage Technology

Sep 2018 – Aug 2022 · 3 yrs 11 mos · Santiago Province, Chile

Transformed ICE’s Mortgage Tech Stack: Slashed Doc Loads by 80%, Enabled 10K+ Daily accessible eClosings During COVID, and Automated Loan Processing by 300%—Driving $1,056/Loan Profit
Document Viewer Modernization (2018-2019)
Problem:
Encompass's legacy viewer caused 10s load delays and $1.2M/year licensing costs, hindering ICE's "eliminate third-party dependencies" mandate.
Action:
Architected cloud React viewer from scratch using virtualization and WCAG best practices.
Developed Adobe-grade editing tools (rotate/delete/reorder pages).
Implemented scroll-driven prefetching via predictive algorithms.
Result:
✅ 80% faster loads (10s→2s) - validated in 2019 Encompass release notes
✅ $1.2M annual savings from license elimination
✅ 99% satisfaction - became default viewer within 6 months
Pandemic eClosing Solution (2020-2021)
Problem:
COVID lockdowns halted in-person signings, threatening ICE's goal to "reduce mortgage processing from 2 months to 2 weeks" during 2021's $4.4T refinancing surge.
Action:
Architected cloud-based eClose UI.
Integrated document viewer with ICE's eClose API for remote wet-signatures.
Added collaboration features for multi-party review
Result:
✅ Enabled 10K+ daily remote signings during peak volume
✅ 72-hour reduction in loan cycles - advancing CEO's efficiency vision
✅ Core enabler of ICE's "30% eClose adoption by 2025" roadmap
AI Loan Labeling System (2021-2022)
Problem:
Manual document processing (30min/file) created backlog during 2021's foreclosure surge, undermining ICE's promise of "$1,056 gross profit per loan" through automation.
Action:
Built ML-assisted labeling system with HTML5 drag and drop annotation tools
Designed human reinforcement workflow for error correction
Integrated with Encompass® Document Automation API
Result:
✅ 300% productivity gain (10min/document)
✅ Enabled 6,500+ daily reviews - driving 23% volume increase
✅ Contributed to $1,056/loan profit (MarketWise 2021 study)

ReactJavaScriptTypeScriptGraphQLUnit TestingA/B Testing+4

Ignis gravitas

Full Stack Engineer

Dec 2016 – Jun 2018 · 1 yr 6 mos

As a foundational engineer at this startup, I drove the development of core platform features from concept to deployment, directly influencing user adoption and satisfaction.
Problem:
Low entrepreneur adoption due to fragmented task management
Action:
Architected React/ Ruby on Rails task manager with drag-and-drop functionality.
Implemented real-time sync for multi-user collaboration.
Developed cloud attachment system with AWS S3 integration.
Result:
✅ 20% higher user satisfaction.
✅ 25% increase in daily active users.
✅ Most-used platform feature within 3 months.
Problem:
Founders struggled with business model visualization
Action:
Built interactive business canvas tool with React drag and drop / DnD library.
Created progress-tracking stations with real-time validation.
Integrated with task manager for unified workflow.
Result:
✅ 15% boost in entrepreneur platform retention.
✅ Featured in LATAM Startup Awards for innovation.
✅ Enabled 500+ entrepreneurs to refine customer strategies.
Problem:
Technical debt slowing feature deployment
Action:
Implemented CI/CD pipeline with gitlab.
Introduced Ruby on Rails and JS Jest testing coverage.
Migrated monolithic Rails app to modular services.
Result:
✅ 40% faster release cycles.
✅ 30% reduction in production bugs.
✅ Enabled scalable architecture for future growth.

React.jsRuby on RailsJavaScriptUnit TestingAWSFull Stack Development

Universidad de los andes (ve)

2 roles

Undergraduate Teaching Assistant

Jan 2016 – Oct 2016 · 9 mos · Mérida Area, Venezuela

In this role, I developed and delivered interactive tutorials, worked one-on-one with students to resolve issues using C++ with SystemC library, and created supplementary materials to enhance the learning experience.
Additionally, I collaborated with the course instructor to design and implement innovative assessments and projects that evaluated students' understanding of computer architecture concepts.
Through this experience, I refined my teaching skills, technical expertise, and passion for inspiring the next generation of engineers.

C++TeachingComputer Architecture

Undergraduate Teaching Assistant

Jan 2014 – Oct 2014 · 9 mos · Mérida Area, Venezuela

As an Undergraduate Teaching Assistant for the Algorithm Design and Programming course in the Mathematics Department of the Faculty of Science, I had the opportunity to work with students to develop their skills in designing, analyzing, and implementing algorithms using C++ and Fortran.
I led discussion sections, provided individualized support, and created practice problems to reinforce concepts.

C++FortranTeaching