Express JS Jobs

Our cloud-based accounting platform is built entirely with a JavaScript/Node.js back-end on top of MongoDB. During closed beta everything behaved, but the moment we opened the doors to a larger audience the application locks up under load—no gradual slowdown, just a complete system freeze that forces a hard restart. I need a seasoned engineer who can dedicate roughly 5–6 hours every day for at least the next three months to hunt down the root causes and redesign the platform so it scales smoothly. You’ll collaborate directly with me and two in-house developers; we work on GitHub, communicate over Slack, and deploy through a basic CI pipeline that will probably need tightening as part of this project. Key objectives 1. Diagnose and eliminate the freeze: trace blockin...

Please don't bid on this project it is for @pmpayasmann as i discuss with you

SRE / DevOps Engineer We’ve built a real-time marketplace. Speed and reliability matter more than anything. We’re live. Things move fast. We need someone who can take ownership of infrastructure and make it solid. What I need you to do - Take full ownership of infra and DevOps - Stabilize the system under real usage - Improve performance, uptime, and response times - Set up proper monitoring, alerting, and logging - Handle deployments cleanly with zero downtime - Lock down security and access properly - Identify weak points and fix them without being told Current stack (you should be comfortable here) - Backend: Node.js - Frontend: React / mobile app - Infra: AWS (EC2, S3, likely more coming) - APIs: real-time interactions, latency matters - Early-stage system, not perfec...

I’m building a green-field product that needs a solid foundation across web, mobile and cloud. The server side will run on .NET (Core/Framework) and expose RESTful endpoints organised as micro-services. For the browser I’m happy with either Angular or React—pick whichever you are fastest with—and the companion mobile app will be written in React Native so we can share as much logic and styling as possible. The data layer can land on SQL Server, a NoSQL store or a mix of both; I’m open to your recommendation as long as the choice is justified and future-proof. Everything will be hosted on AWS or Azure, wired into a CI/CD pipeline (GitHub Actions or Azure DevOps are fine) so every commit ships automatically through test, staging and production. Clean code, SOLI...

I have large CSV lists of addresses and I need a straightforward tool that tells me which emails will actually reach an inbox. The key requirement is deliverability testing; I’m not interested in simply catching typos—I want to know whether each address can really receive mail. Domain-level validation must be part of the logic. The script should check that MX records exist and that the domain is capable of accepting messages. If you have a proven, low-latency way to add additional checks (such as a lightweight SMTP handshake that stops short of sending a message) I’m open to it, as long as it doesn’t violate host policies or slow the bulk run noticeably. Workflow I have in mind: I drop a file (CSV or TXT) containing thousands of emails into a folder, run the pro...

I am looking to build a cutting-edge online casino website featuring progressive jackpot slot games and incorporating cryptocurrency transactions. Here are my requirements: - Implement a variety of exciting and engaging slot variants with a focus on progressive jackpot slot machines. - The website should be designed to support cryptocurrency transactions, offering an innovative and secure way for users to enjoy their gaming experience. An ideal candidate should: - Have experience developing betting websites, particularly online casinos. - Show a strong understanding and knowledge of integrating cryptocurrency payments. - Be experienced in designing engaging and successful slot machine games, specifically progressive jackpot slots.