Senior Software Engineer at Tech Startup
Full-stack engineer with 10+ years of experience building scalable web applications that serve millions of users. Specialized in React, Node.js, and cloud architecture. Passionate about clean code, mentoring junior developers, and solving complex technical challenges.
VP of Engineering at Stripe
Recommendation obtained from @stripe.com
I hired John at Stripe and managed him for 1.5 years. He joined as a senior engineer and was promoted to staff engineer due to his exceptional impact.
1.5 years
John is what I call a 'force multiplier' engineer. His direct contributions are excellent, but his real impact comes from how he elevates the entire team. He established coding standards, improved our development processes, and mentored engineers at all levels. His work on our payment processing system was critical to our ability to scale. He also has strong business acumen and always thinks about ROI.
John is in the top 1% of engineers I've worked with. He has the technical chops of a staff engineer, the leadership qualities of a manager, and the business sense of a founder. He's the kind of person you build a company around. I can't recommend him highly enough - any team that gets him is getting a tremendous asset.
Verified on October 18, 2025
Principal Engineer at Amazon
Recommendation obtained from @amazon.com
John and I were both principal engineers at Amazon, working on different services that needed to integrate closely. We collaborated on architecture decisions and cross-team initiatives.
3 years
John's architectural thinking is outstanding. He designs systems that are both elegant and pragmatic - they solve today's problems while being flexible enough for tomorrow's unknowns. His documentation is thorough and clear, which made our integration work much smoother than usual. He's also excellent at consensus-building and getting alignment across teams.
John operates at a principal/staff level in every sense. He thinks strategically about technology, influences decisions across organizations, and delivers results that last. If you're building something complex and important, you want John on your team. He's one of the best engineers I've worked with in my 15-year career.
Verified on September 5, 2025
Engineering Manager at Meta
Recommendation obtained from @meta.com
John was on my team at Meta for 2 years, working on React and the open source ecosystem. He made significant contributions to several widely-used libraries.
2 years
John combines deep technical expertise with excellent collaboration skills. His contributions to our open source projects were consistently high quality and well-documented. He's also generous with his knowledge - he ran internal workshops that helped dozens of engineers level up their React skills. His ability to write clean, performant, and maintainable code is exceptional.
John is an A+ engineer who would be an asset to any team. He's the kind of person who makes everyone around him better through his example, his mentorship, and his willingness to help. His technical skills are top-tier, but it's his character and work ethic that really make him stand out. Highly recommend.
Verified on July 25, 2025
Product Manager at Microsoft
Recommendation obtained from @microsoft.com
I was the PM for a product where John was the tech lead. We worked together for 2.5 years shipping multiple major features.
2.5 years
John is the best technical partner I've ever worked with. He doesn't just implement what you ask for - he challenges assumptions, proposes better solutions, and always thinks about the user experience. His estimates are accurate, his deliverables are high quality, and he proactively communicates blockers. He also has great product instincts and often suggested features that became user favorites.
If you're a PM looking for an engineer who will make your product better, John is your guy. He brings both technical excellence and product thinking to the table. Our product's success was largely due to his contributions. I've recommended him to several colleagues and would work with him again without hesitation.
Verified on June 10, 2025
Senior Staff Engineer at Google
Recommendation obtained from @google.com
John and I worked together as senior engineers on Google's search infrastructure team. We collaborated on multiple high-impact projects over 4 years.
4 years
John has an incredible depth of knowledge across the entire stack. He's equally comfortable optimizing database queries, designing APIs, or building responsive frontends. What really sets him apart is his systematic approach to problem-solving and his commitment to code quality. He introduced testing practices that significantly reduced our bug rate.
Working with John raised my own standards as an engineer. He's meticulous about doing things right, but pragmatic about shipping on time. His contributions to our codebase are still being used years later because they're so well-designed and maintainable. Any team would be lucky to have him.
Verified on April 20, 2025
Engineering Director at Spotify
Recommendation obtained from @spotify.com
I had the privilege of managing John for 3 years at Spotify. He was a key member of our platform team, working on infrastructure that supported millions of concurrent users.
3 years
John excels at tackling complex technical challenges with elegant solutions. His ability to break down complicated problems into manageable pieces is remarkable. He's also an excellent communicator who can explain technical concepts to both engineers and non-technical stakeholders. His code reviews are thorough, constructive, and educational.
John is the type of engineer every team needs - technically brilliant, collaborative, and always focused on delivering value. He improved our system's performance by 60% and reduced infrastructure costs by 40%. More importantly, he mentored several junior engineers who credit him for their growth. I would hire him again in a heartbeat.
Verified on February 15, 2025
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