Senior Backend Engineer

Senior Backend Engineer

Role Overview

Build systems. Own outcomes. Grow into leadership.‍ At MX18, we're building a modern email infrastructure platform that powers reliable, scalablecommunication for businesses worldwide. We're looking for a hands-on backend engineerwho enjoys solving complex engineering problems and wants to take ownership beyondwriting code.You'll work closely with our core engineering team to understand the platform end-to-end andgradually take ownership of key modules, architecture decisions, and engineering execution.

What You'll Do

● Design, develop, and maintain scalable backend services and APIs.

● Build and enhance distributed microservices.

● Collaborate with Product, Engineering, and Support teams to deliver high-quality features.

● Write clean, maintainable, and well-tested code.

● Review code, troubleshoot production issues, and improve system performance.

● Contribute to architecture discussions and engineering best practices.

● Take ownership of features from design through deployment and production support.

● Mentor junior engineers and actively contribute to a collaborative engineering culture.

Tech Stack

React, Node.js, Java, PostgreSQL, Redis, ActiveMQ, Docker, and Microservices Architecture.

What We're Looking For

● 4–8 years of backend development experience.

● Strong hands-on experience with Node.js and working knowledge of Java.

● Experience building REST APIs and distributed microservices.

● Good understanding of PostgreSQL, Redis, and messaging systems.

● Familiarity with Docker and Git-based development workflows.

● Strong problem-solving skills and understanding of scalable system design.

● Comfortable working in a fast-paced product startup environment.

Who You Are

● You take ownership beyond assigned tasks.

● You enjoy solving engineering challenges, not just delivering features.

● You think about scalability, performance, and reliability while writing code.

● You collaborate well with cross-functional teams and communicate effectively.

● You're eager to learn, mentor others, and grow into larger technical responsibilities.

Why Join MX18

● Build a modern, high-scale SaaS platform solving real engineering challenges.

● Work directly with the founders and influence technical decisions from day one.

● High ownership with the opportunity to work across architecture, distributed systems, and product engineering.

● Competitive salary along with meaningful ESOPs, giving you the opportunity to grow with the company and share in its long-term success.

● A fast-paced environment that values ownership, learning, and engineering excellence over hierarchy.

● Build something you'll be proud to put your name on - a world-class email platform used by businesses worldwide.