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Lukas Welinder

@lukaswelinder

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Senior front-end engineer specializing in scalable React and Next.js apps, improving performance and usability.

United States

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What I'm looking for

I’m looking for a team where I can build scalable React/Next.js product experiences end-to-end, own performance and usability improvements, and collaborate with UX and product to deliver reliable features—while mentoring engineers and raising code-quality standards.

I’m a Senior Frontend Engineer with extensive experience building scalable web applications using React and Next.js. I’ve modernized presentation layers for enterprise SaaS platforms with a clear focus on performance, usability, and translating product requirements into clean, maintainable code.

In my recent roles, I led engineering efforts that improved code quality and maintainability—reducing bug reports by 30%—and helped teams improve delivery timelines by 20%. I’ve also optimized critical enterprise applications to increase load speed by 25%, built reusable UI components to accelerate feature development, and implemented state management for real-time data updates while collaborating closely with UX designers and cross-functional teams.

Experience

Work history, roles, and key accomplishments

Current

Lead Full Stack Engineer

Current

Chorus

Aug 2025 - Present (10 months)

Architected and developed scalable web applications using React and Next.js to improve user experience and performance. Led a team using code-quality best practices (30% fewer bug reports) and improved delivery timelines by 20% while integrating REST APIs for real-time updates.

React Next.js TypeScript REST APIs WebSockets State Management Team Leadership Code Quality

Senior Full Stack Engineer

Vorto

Apr 2024 - Aug 2025 (1 year 4 months)

Designed and built reusable UI components and frameworks to accelerate feature development and improve team efficiency. Optimized enterprise applications for performance and responsiveness, increasing load speed for critical workflows by 25%.

React TypeScript UI Components Performance Optimization Responsive Web Design enterprise applications Cross Functional Collaboration

Software Architect Team Lead

Webscale Networks

Nov 2021 - Oct 2023 (1 year 11 months)

Led architectural design of a scalable front-end system using React, improving application performance and user engagement. Implemented state management for real-time data updates and maintained front-end architecture documentation to support onboarding and knowledge transfer.

React TypeScript State Management Performance Optimization Technical Documentation Team Leadership Maintain

Principal / Founding Engineer

Obo

Oct 2016 - Oct 2021 (5 years)

Pioneered a B2B web application using React and Node.js to deliver a robust, scalable platform. Collaborated with cross-functional teams to translate requirements into technical specifications and mentored junior developers to strengthen engineering practices.

React Node.Js Development TypeScript Requirements Analysis Specifications Cross Functional Collaboration Mentorship Scalability

Consultant / Freelancer

Self Employed

Jan 2012 - Dec 2016 (4 years 11 months)

Provided front-end consulting services using JavaScript frameworks and API integrations. Built custom web applications tailored to client requirements, improving operational efficiency and user engagement.

JavaScript API Integration Web Applications User Engagement Web Development