Senior Backend Engineer

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

• 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

• 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