Freelance Node.js Backend Architecture and API Development

Freelance Node.js Backend Architecture and API DevelopmentFreelance Node.js Backend Architecture and API Development

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Divya Shakti Tripathi

• 2d

Over the last 4 years of building B2B SaaS backends, I've seen simple architectural oversights cause major production headaches — like default singleton scoping in multi-tenant apps leading to cross-request leaks.

I'm currently accepting new freelance contracts and backend projects on Contra! 🚀

Available for: • Node.js & NestJS backend architecture & microservices • High-performance REST API development • Database optimization & migrations (PostgreSQL, Prisma, MongoDB) • Auth systems & third-party integrations

Shoot me a direct message to collaborate!

Node.js NestJS Backend Development

Anas Mabrouk Eddahani

• Oct 7

Technical performance engineering and Core Web Vitals optimization for comoimportarmicoche.es.

Achieved 92+ performance scores on mobile alongside 100/100 ratings in SEO, Best Practices, and Accessibility on a live production WordPress site by streamlining front-end asset delivery and eliminating backend execution bottlenecks.

Key Engineering Highlights: • Asset Optimization: Minified, combined, and deferred non-critical CSS/JS, significantly reducing render-blocking resources and critical path latency. • Next-Gen Media Pipeline: Implemented WebP image conversion, explicit aspect ratio dimensions to eliminate Cumulative Layout Shift (CLS), and native lazy-loading. • Clean Architecture: Optimized dynamic database queries and custom PHP scripts to maintain near-instant Server Response Time (TTFB) without relying on heavy caching plugins. • Core Web Vitals Targets: Focused on Largest Contentful Paint (LCP) and Interaction to Next Paint (INP) to deliver sub-1.5s real-world loading times on mobile devices.

Completed work

Search Engine Optimization Web Development WordPress Development Google Search Console JavaScript WordPress

Anas Mabrouk Eddahani

• Oct 8

Yeah, this was a cold run in PSI. The DB cleanup was actually huge for TTFB—dropped uncached server response under 200ms, mostly by clearing bloated wp_options and fixing custom loops. Caching handles repeat hits, but the backend fix was the main win.

Abron Studio

pro

• Oct 7

We first heard about Contra through Blahomyr and his posts on LinkedIn. After doing some research, we realized that Contra is a platform that could be a great fit for our studio. Hopefully, we’ll land our first project here very soon!

Blahomyr Popok

max

• Aug 27

A huge milestone for me🔥

Still feels a little unreal seeing that.

Along the way my PTS score on Contra went up too, which makes this milestone even more meaningful. It’s not just about the number: it’s all the projects, clients, late nights, ideas, mistakes, and lessons that got...