Senior Backend Engineer (Node.js)

About this role

About Us
Scramblyis one of the fastest-growing adtech startups in the world, featured in the AppsFlyer Performance Index and Singular ROI Index in just 3.5 years.

We’re growing 250%+ YoY across revenue, team, product, and technology — fully bootstrapped and profitable.

We’re building the future of app discovery: a reward-powered alternative to the App Store and Google Play. Our loyalty-driven ecosystem connects millions of users with the world’s top apps and delivers unmatched, ROI-focused growth for mobile advertisers.

Our mission is to build a true alternative to traditional app stores — fueled by rewards and data — and create a new, performance-first growth engine for mobile app advertisers.

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 work across two key areas: user-facing product systems, solving complex scalability challenges for a platform serving millions of users globally; and theinternal platform, covering admin systems, tooling, and back-office automation that power our operations team.

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 testablecode 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)

• Hands-on experience with React, capable of implementing basic UI features for internal tools independently

• 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

What We Offer

• 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

• Flexible, remote-friendly working environment

• 15 days of paid vacation

• 5 days of paid days off

• 5 days of paid sick leave

• Maternity/Paternity leave

• National holidays based on your country of stay

Originally posted on Himalayas