Senior Backend Technical Lead

At Elfie, we’re not just building a health tracking app. We’re changing how people manage their health worldwide. If you're looking for a mission with global reach, real impact, and a team that scales fast and learns even faster, you’ve just found your next move.

About The Role

We’re looking for a seasoned and passionate engineering leader interested in joining our early-stage venture as full-time back-end engineering lead. In this role, you will build and maintain our product’s backend services, APIs, and deployment, for our global health tech mobile platform. Manage a senior team with engineers who have 10+ years of experience in software development, interacting with senior leaders and managing expectations.

What You’ll Get

• 🧳 Relocation Support - Discussed on a case-by-case basis
• 💰 Competitive Salary - Offered based on your location and experience
• 💻 Tech Setup - Receiving the equipment and tools you need to do your best work
• 🌱 Growth Opportunity - We support your growth and skill development over time
• 🎯 Bonus Scheme - Performance-related, quarterly paid
• 🌴 Paid Time Off & Public Holidays - Policy varies by country and contract type
• 🏠 Hybrid Working - Typically 3 days in the office per week
• 🍛 Meals & Refreshments (Vietnam Office Only) - We’ve got you covered

The tech stack that we use at Elfie consists of the following:

• Front-end: Flutter, Firebase suite (Authentication, Firestore, Storage, Messaging), Native iOS / Android
• Back-end: Node.js (NestJS / TypeScript), GCP (PubSub, Cloud Tasks, Functions, …), TypeScript, Python
• DevOps: GitHub Actions, GCP (Cloud Build, Cloud Run), Docker
• Analytics: GCP DataStudio, BigQuery, Google Analytics, UXcam, CleverTap, Adjust

• Lead the backend development team, providing technical direction, mentorship, and best practices. Oversee code reviews and ensure adherence to clean coding standards and design principles.
• Design and implement scalable, secure, and high-performance microservices-based architectures.
• Architect and implement agentic AI workflows and RAG (Retrieval-Augmented Generation) systems to drive personalized user interactions and automated coaching features.
• Oversee the data pipelines and infrastructure required for real-time AI model inference, ensuring high-performance and low-latency integration within a microservices-based environment.
• Collaborate related stakeholders to align on requirements and delivery timelines.
• Optimize application performance, monitor system reliability, and troubleshoot issues proactively.
• Advocate for CI/CD pipelines, automated testing, and robust version control strategies.
• Document key architectural decisions, APIs, and processes for internal use.

• Proven Experience: 8+ years of professional backend development experience, with 3+ years in a lead role.
• Programming Languages: Expertise in Node.js, Javascript, TypeScript and Python. Have experiences with statically typed languages (e.g, JAVA / GO / .NET) is a plus
• Microservices Architecture: Strong experience in building and managing microservices at scale.
• Cloud Platforms: Hands-on experience with Google Cloud Platform (GCP) services such as Cloud Functions, Pub/Sub, BigQuery, or similar.
• Databases: Proficiency in both relational (PostgreSQL, MySQL) and NoSQL (e.g, MongoDB, Firestore) databases.
• API Development: Extensive experience with RESTful APIs and GraphQL.
• DevOps Knowledge: Familiarity with Kubernetes, Docker, CI/CD pipelines, and infrastructure as code (e.g., Terraform).
• Soft Skills: Excellent communication (Vietnames, English), team collaboration, and problem-solving abilities.

We're a global start-up that is mission-led, and fiercely product-driven.

We're building something that improves lives - and we're doing it with a culture of trust, freedom, and high performance.

About Elfie

Elfie is the first completely free, gamified mobile app that rewards users for managing their health. Our goal? To become the world’s largest self-reported medical record platform — across all therapeutic areas.

We operate in 10+ countries today, with plans to expand into 15 by the end of 2025.

📲 Try Elfie for yourself by downloading it on the App Store for IOS or Google Play store for Android.

What Now?

Apply today for immediate consideration! Got someone in mind? We offer a referral reward if your recommendation is hired. Contact Talent Acquisition for more info.