{"id":3057,"date":"2026-08-14T11:03:32","date_gmt":"2026-08-14T11:03:32","guid":{"rendered":"https:\/\/tradefinder.help\/?p=3057"},"modified":"2026-08-14T11:03:32","modified_gmt":"2026-08-14T11:03:32","slug":"proxify-ab-senior-mern-developer-react-js-node-js","status":"publish","type":"post","link":"https:\/\/tradefinder.help\/?p=3057","title":{"rendered":"Proxify AB: Senior MERN Developer (React.js + Node.js)"},"content":{"rendered":"<p>\n  <strong>Headquarters:<\/strong> Sweden<br \/>\n    <br \/><strong>URL:<\/strong> <a href=\"http:\/\/career.proxify.io\/\" target=\"_blank\" rel=\"noopener\">http:\/\/career.proxify.io<\/a>\n<\/p>\n<h3><strong>The Role:<\/strong><\/h3>\n<p>We are looking for a Senior MERN Stack Developer with heavy specialization in React.js and Node.js on behalf of one of our high-growth clients to architect, scale, and maintain high-throughput web applications. In this role, you will take operational ownership of both front-end user interfaces and back-end microservices, delivering seamless, secure, and responsive digital products. You will bridge user-facing features with complex database architectures and cloud infrastructure. You are a perfect candidate if you are growth-oriented, you love what you do, and you enjoy working on new ideas to develop exciting products<\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<h4><strong>What we are looking for:<\/strong><\/h4>\n<ul>\n<li>5+ years of professional software engineering experience designing, building, and deploying end-to-end applications using MongoDB, Express.js, React.js, and Node.js.<\/li>\n<li>Deep proficiency in modern JavaScript (ES6+), TypeScript, asynchronous programming, event loops, and memory management across client and server environments.<\/li>\n<li>Deep mastery of React internals, custom hooks, component design patterns, state management (Redux Toolkit, Zustand, or React Query), SSR\/SSG frameworks (Next.js is a strong plus), and performance optimization (virtualization, code splitting, Web Vitals).<\/li>\n<li>Proven experience architecting scalable RESTful APIs, WebSockets, and\/or GraphQL services. Proficiency with middleware design, authentication protocols (JWT, OAuth2, Passport.js), and event-driven architectures.<\/li>\n<li>Advanced knowledge of MongoDB schema design, aggregation pipelines, index strategy, performance tuning, and ORMs\/ODMs like Mongoose or Prisma.<\/li>\n<li>Strong commitment to test-driven development using frameworks like Jest, React Testing Library, and Cypress, alongside hands-on experience with Docker, CI\/CD pipelines (GitHub Actions), and AWS cloud services.<\/li>\n<li>Time zone: CET (+\/- 3 hours). We are unable to consider applications from candidates in other time zones.<\/li>\n<\/ul>\n<p><strong>\u00a0<\/strong><\/p>\n<h4><strong>Nice-to-have:<\/strong><\/h4>\n<ul>\n<li>Experience with Next.js or Remix for production-grade full-stack React frameworks.<\/li>\n<li>Familiarity with relational databases (PostgreSQL, MySQL) alongside MongoDB.<\/li>\n<li>Experience with vector databases or AI model integration into Node.js backend services.<\/li>\n<li>Exposure to micro-frontends or monorepo setups (Turborepo, Nx).<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<h4><strong>Responsibilities:<\/strong><\/h4>\n<ul>\n<li>Design, develop, and deploy scalable full-stack features from initial database schema creation down to polished, pixel-perfect React interfaces.<\/li>\n<li>Build secure, high-concurrency microservices and web services, managing integrations with third-party APIs, webhooks, and real-time communication channels.<\/li>\n<li>Audit, profile, and optimize application throughput\u2014reducing bundle sizes and rendering overhead on the front end while optimizing database queries and caching layers (Redis) on the back end.<\/li>\n<li>Lead architectural discussions, write modular and well-documented TypeScript code, enforce strict testing protocols, and conduct thorough peer code reviews.<\/li>\n<li>Collaborate with cloud and DevOps engineers to containerize applications, set up automated deployment pipelines, and maintain system monitoring tools.<\/li>\n<\/ul>\n<p><strong><\/strong><\/p>\n<div>\u00a0<\/div>\n<h4><strong>What we offer:<\/strong><\/h4>\n<div>\u00a0<\/div>\n<div><strong>Get paid, not played<\/strong><\/div>\n<div>No more unreliable clients. Enjoy on-time monthly payments with flexible withdrawal options.<\/div>\n<div>\u00a0<\/div>\n<div><strong>Predictable project hours<\/strong><\/div>\n<div>Enjoy a harmonious work-life balance with consistent 8-hour working days with clients.<\/div>\n<div>\u00a0<\/div>\n<div><strong>Flex days, so you can recharge<\/strong><\/div>\n<div>Enjoy up to 24 flex days off per year without losing pay, for full-time positions found through Proxify.<\/div>\n<div>\u00a0<\/div>\n<div><strong>Career-accelerating positions at cutting-edge companies<\/strong><\/div>\n<div>Discover exclusive long-term remote positions at the world&#8217;s most exciting companies.<\/div>\n<div>\u00a0<\/div>\n<div><strong>Hand-picked opportunities, just for you<\/strong><\/div>\n<div>Skip the typical recruitment roadblocks and biases with personally matched positions.<\/div>\n<div>\u00a0<\/div>\n<div><strong>One seamless process, multiple opportunities<\/strong><\/div>\n<div>A one-time contracting process for endless opportunities, with no extra assessments.<\/div>\n<div>\u00a0<\/div>\n<div><strong>Compensation<\/strong><\/div>\n<div>Enjoy the same pay, every month with positions landed through Proxify.<\/div>\n<p><strong>To apply:<\/strong> <a href=\"https:\/\/weworkremotely.com\/remote-jobs\/proxify-ab-senior-mern-developer-react-js-node-js\" target=\"_blank\" rel=\"noopener\">https:\/\/weworkremotely.com\/remote-jobs\/proxify-ab-senior-mern-developer-react-js-node-js<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Headquarters: Sweden URL: http:\/\/career.proxify.io The Role: We are looking for a Senior MERN Stack Developer with heavy specialization in React.js and Node.js on behalf of one of our high-growth clients to architect, scale, and maintain high-throughput web applications. In this role, you will take operational ownership of both front-end user interfaces and back-end microservices, delivering [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3057","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"featured_image_url":[],"post_author":"sonifashionhouse@gmail.com","assigned_categories":"Uncategorized","jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/tradefinder.help\/index.php?rest_route=\/wp\/v2\/posts\/3057","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tradefinder.help\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tradefinder.help\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tradefinder.help\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tradefinder.help\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3057"}],"version-history":[{"count":0,"href":"https:\/\/tradefinder.help\/index.php?rest_route=\/wp\/v2\/posts\/3057\/revisions"}],"wp:attachment":[{"href":"https:\/\/tradefinder.help\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3057"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tradefinder.help\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3057"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tradefinder.help\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3057"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}