Senior Backend Engineer

Description

### **About the Role** We are looking for a **Senior Backend Engineer** to join the team building the core systems behind **Scrambly**. In this role, you will be solving complex scalability challenges for a platform serving millions of users globally. Your focus will be on writing robust, high\-performance code and bridging the gap between product requirements and technical reality. You will work within a modern tech stack to ensure our systems remain fast, reliable, and easy to maintain as we grow. ### **Key Responsibilities** * **Design \& Implementation** * + Design, build, and maintain high\-performance, scalable backend services and APIs using Node.js (**NestJS**) + Write **clean**, **maintainable**,and **testable** code that serves as a benchmark for the team + Ensure seamless integration between backend services and frontend applications * **Architecture \& Technical Strategy** * + Propose and implement architectural improvements for core systems + Design complex features with a focus on long\-term scalability, extensibility, and maintainability + Apply best practices for distributed systems and RESTful API design * **Mentorship \& Code Quality** * + Champion high code quality and engineering best practices across the team + Mentor other engineers through constructive code reviews, technical guidance, and pair programming + Foster a culture of technical curiosity and continuous improvement * **Performance \& Infrastructure** * + Monitor system performance, identify bottlenecks, and proactively resolve reliability issues + Collaborate with DevOps to ensure smooth CI/CD pipelines, deployments, and infrastructure reliability + Work with containerization and orchestration tools to manage application lifecycles * **Cross\-functional Collaboration** * + Work closely with Product, Design, Frontend, and QA teams to deliver high\-quality features + Translate product requirements into robust technical specifications + Communicate technical constraints and trade\-offs clearly to non\-technical stakeholders **Requirements** * 5\+ years of software engineering experience, with a strong focus on backend development * Strong proficiency in Node.js and modern frameworks like NestJS * Excellent system design skills and a solid understanding of backend architecture, RESTful APIs, and distributed systems * Experience with cloud platforms (GCP preferred; AWS or Azure acceptable), containerization (Docker), and orchestration/IaC (Kubernetes, Terraform, Helm) * Proficiency with relational (e.g., PostgreSQL), NoSQL (e.g., Redis) databases, and message queues (e.g., RabbitMQ, GCP Pub/Sub, Redis Pub/Sub) * Strong communication and collaboration skills, comfortable working in a fast\-paced team environment * **English:** Upper\-Intermediate or higher (**B2/B2\+, written and spoken**). You need to be able to communicate clearly in English to work effectively in an international team and participate in architectural discussions ### **Nice to Have** * Experience in a B2C startup that has scaled to millions of users * Basic proficiency in **Go**; able to read, write, and maintain basic Go services without starting to learn from scratch * Hands\-on experience with **React**, capable of implementing basic UI features or internal tools independently **Benefits** * Work on systems where performance optimizations translate to immediate user impact for millions of users * A culture of code reviews, knowledge sharing, and mentorship where the best idea wins * A fast\-paced environment where your code quickly translates into real user value * We value the stability and value of what you ship, not just the number of lines of code * Competitive compensation and flexibility