Express JS Jobs

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...

Part-Time Full Stack Developer (POS + Marketplace | Hybrid Mobile | Ongoing Project) About Us We are a technology company building a modern Point-of-Sale (POS) platform and marketplace. Our platform enables businesses to manage operations while giving members a seamless way to browse and purchase products. We are currently launching within a highly regulated sector and integrating with systems such as METRC. As we scale, we will expand into broader retail, including brick-and-mortar and e-commerce businesses. This is a long-term opportunity focused on building and scaling a real product. Position Overview We are hiring a part-time developer (individual or team) for an hourly position to help build, refine, and scale our platform. Please submit your requested hourly rate when applyin...

Title: Senior Full Stack Developer (TypeScript, React, Node) for Mercor Project Description: We are looking for a talented and experienced Senior Full Stack Developer to join our team for the Mercor project, a scalable platform in the logistics/3PL domain. You will be responsible for designing and developing high-quality, scalable applications, collaborating with cross-functional teams, and owning features end-to-end. Responsibilities: Develop backend services using Node.js and TypeScript Build responsive frontend interfaces with React Design and integrate RESTful APIs Ensure performance, scalability, and code quality Collaborate with stakeholders and engineers Requirements: Strong experience with TypeScript, Node.js, and React Experience building scalable web applications Familiarit...

This is a partnership/revenue share project.I have developed a functional MVP of a hexagonal submarine strategy game called "Depth Clash" using React and Capacitor. The game currently features a 14x11 hex-grid and a single-player mode against AI. The Task: I need an expert Full-Stack Developer to: Integrate for real-time multiplayer functionality. Build a Node.js/Express backend to handle game logic and player sessions. Implement a Tournament System with a "Ships-as-Currency" economy (Staking virtual assets to enter a 3-9 player match). Connect a simple secure payment/shop module for VIP assets ($1.50 per ship). Requirements: Deep knowledge of React.js and Node.js. Experience with (real-time state s...

###Project Description: I purchased a premium restaurant theme (Tastyc) and I’m looking for a skilled developer to clean, customize, and deploy it. ***This is a React / project, not WordPress.*** The goal is to turn the theme into a fast, modern, conversion-focused restaurant website. #What I Need: Set up the project locally Clean unnecessary demo content Customize design (colors, fonts, branding) Adapt layout to fit my restaurant (FoodRush) Build structured pages: *Home *Menu (very important) *Contact *About *Integrate my menu properly (tacos, burgers, bowls, etc.) *Optimize mobile experience (very important) *Improve performance (SEO + speed) *Deploy the website (Vercel or similar) #Bonus (Preferred) Experience with restaurant / food websites Experience with 13+ / App Rou...

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.