Claude Code
performance
Callback Hell Making Code Unmaintainable
Code with multiple nested async operations becomes deeply nested and hard to follow (callback hell). Fixing bugs or adding features becomes dangerous due to complexity. Code written before async/await was standardized.
Refactoring to async/await would improve readability and maintainability significantly.
Error Messages You Might See
Code deeply nested with callbacks
Difficult to add error handling
Bug fixes introduce new issues (spaghetti code)
Common Causes
- Multiple chained async operations before async/await was available
- Mixing callback and Promise styles creating inconsistency
- Error handling spread across multiple catch blocks
- Code written in callback style instead of modern Promise patterns
- Complex control flow (loops, conditionals) made hard with callbacks
How to Fix It
Convert callbacks to Promises first if needed. Then use async/await for clean syntax. Example: async function load() { const user = await getUser(); const posts = await getPosts(user.id); }. Use try-catch for error handling. All error handling in one place. Much easier to read and debug than nested callbacks.
Real developers can help you.
Milan Surelia
Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems.
Expertise:
💡 Developing cross-platform apps using Flutter, Dart, and Jetpack Compose for Android, iOS, and Web.
🖋️ Sharing insights through technical writing, blogging, and open-source contributions.
🤝 Collaborating closely with designers, PMs, and developers to build seamless mobile experiences.
Notable Achievements:
🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX.
🚀 Launched Compose101 — a Jetpack Compose starter kit to speed up Android development.
🌟 Open source contributions on Github & StackOverflow for Flutter & Dart
🎖️ Worked on improving app performance and user experience with smart solutions.
Milan is always happy to connect, work on new ideas, and explore the latest in technology.
Bastien Labelle
Full stack dev w/ 20+ years of experience
Victor Denisov
Developer
legrab
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Richard McSorley
Full-Stack Software Engineer with 8+ years building high-performance applications for enterprise clients. Shipped production systems at Walmart (4,000+ stores), Cigna (20M+ users), and Arkansas Blue Cross. 5 patents in retail/supply chain tech. Currently focused on AI integrations, automation tools, and TypeScript-first architectures.
Taufan
I’m a product-focused engineer and tech leader who builds scalable systems and turns ideas into production-ready platforms.
Over the past years, I’ve worked across startups and fast-moving teams, leading backend architecture, improving system reliability, and shipping products used by thousands of users. My strength is not just writing code — but connecting product vision, technical execution, and business impact.
Sage Fulcher
Hey I'm Sage! Im a Boston area software engineer who grew up in South Florida. Ive worked at a ton of cool places like a telehealth kidney care startup that took part in a billion dollar merger (Cricket health/Interwell health), a boutique design agency where I got to work on a ton of exciting startups including a photography education app, a collegiate Esports league and more (Philosophie), a data analytics as a service startup in Cambridge (MA) as well as at Phillips and MIT Lincoln Lab where I designed and developed novel network security visualizations and analytics. I've been writing code and furiously devoted to using computers to make people’s lives easier for about 17 years. My degree is in making computers make pretty lights and sounds. Outside of work I love hip hop, the Celtics, professional wrestling, magic the gathering, photography, drumming, and guitars (both making and playing them)
Basel Issmail
’m a Senior Full-Stack Developer and Tech Lead with experience designing and building scalable web platforms. I work across the full development lifecycle, from translating business requirements into technical architecture to delivering reliable production systems.
My work focuses on modern web technologies, including TypeScript, Angular, Node.js, and cloud-based architectures. I enjoy solving complex technical problems and helping teams turn product ideas and prototypes into working platforms that can grow and scale.
In addition to development, I often collaborate closely with product managers, business analysts, designers, and QA teams to ensure that solutions align with both technical and business goals.
I enjoy working with startups and product teams where I can contribute both as a hands-on engineer and as a technical partner in designing and delivering impactful software.
Nam Tran
10 years as fullstack developer
Matt Butler
Software Engineer @ AWS
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
How to convert callbacks to async/await?
callback-based: fn(data, (err, result) => {}). Promise-based: fn(data).then(). async/await: const result = await fn(data).
How to handle errors with async/await?
try { const result = await fn(); } catch (error) { handle error }. All error handling in one place.
Can async/await be used with all async operations?
Yes. Any function returning Promise can be awaited. If using callbacks, convert to Promise-returning first.