Principal Full Stack Engineer - Loyalty

Liven PTY Ltd; Daerah Khusus Ibukota Jakarta; Hybrid; IDR 1.331.779.000 - 1.997.670.000; Full time

Job summary

A leading hospitality tech company in Jakarta seeks a Principal Full Stack Engineer to enhance its loyalty platform. The role demands 7+ years of full-stack experience, with strong skills in React and Node.js. You'll build high-performance user interfaces and scalable backend services, ensuring seamless data flow with GraphQL APIs. Join a dynamic team to shape customer engagement solutions that impact millions of users worldwide. You will work in a hybrid environment, contributing to a tech-first culture.

Qualifications

• 7+ years of experience in full-stack engineering roles.
• Expertise with React (Next.js) and React Native for frontend development.
• Advanced backend development experience with Go, Node.js, Nest.js, and Express.js.
• Strong understanding of GraphQL and modern API architecture.

Responsibilities

• Build responsive, high-performance user interfaces.
• Develop and maintain scalable backend microservices.
• Design and maintain GraphQL APIs ensuring efficient data flows.
• Deploy, monitor, and scale systems using GCP.

Skills

Frontend Development (React, Next.js)

Backend Development (Node.js, Go, Nest.js, Express.js)

GraphQL API Design

PostgreSQL and Redis

GCP Deployment

Collaboration Skills

Tools

GCP

PostgreSQL

GraphQL

Job description

Join the revolution in hospitality tech!

Liven is a leading global data, technology, and customer experience provider for the hospitality industry. From humble beginnings, we have grown to serve over 6,000 venues and millions of diners across Australia, the USA, and Southeast Asia, processing over 120 million transactions worth more than $3 billion (AUD) annually.

At Liven, our platform is built to help hospitality businesses save more and work smarter by seamlessly integrating every aspect of their operations — from ordering and payments to back-of-house management .

Driven by a deep passion for the hospitality industry, we continuously innovate to elevate the experience for both venues and their guests. Our solutions are powered by AI-enriched insights and automated workflows , enabling smarter decision‑making and smoother operations at scale.

We’re proud to be an AI‑first organisation . By automating repetitive tasks, we free up space for our teams — and our customers — to focus on what truly matters: solving complex problems, delighting guests, and driving meaningful growth.

Key Milestones

• Global Reach: From Melbourne to New York, Singapore to Jakarta, and all the way to Chennai, our presence spans major cities across the globe.

If you’re someone who thrives on creativity, bold thinking, and using technology to make things better, faster, and smarter — you’ll feel right at home here.

About the role

As a Principal Full Stack Engineer for Liven’s Loyalty Platform, you will play a central role in building and scaling the core systems that power Liven’s rewards, incentives, and customer engagement experiences across web and mobile. You’ll work across the stack (React/Next.js, React Native, Node.js, Nest.js, PostgreSQL, GCP) to deliver high‑performance UIs, resilient backend services, and seamless integrations that support millions of users and thousands of venues.

This role is hands‑on, impact‑driven, and focused on delivering product features quickly and reliably — improving performance, reducing tech debt, and accelerating the rollout of new loyalty capabilities across the Liven ecosystem.

What you’ll do

• Build responsive, high‑performance user interfaces using React (Next.js) for web and React Native for mobile
• Develop and maintain scalable backend microservices using Go, Node.js, Nest.js, and Express.js
• Design, optimize, and maintain GraphQL APIs with Apollo, ensuring efficient and reliable data flows
• Implement and manage robust data models using PostgreSQL, with Redis for caching, rate limiting, and performance improvements
• Deploy, monitor, and scale systems using GCP, ensuring platform reliability and security
• Collaborate closely with product managers, designers, and engineers to refine product strategy and ship features that support user growth and engagement
• Refactor and modernise legacy systems, reducing tech debt and improving maintainability across the loyalty platform
• Participate in architectural design discussions, code reviews, and technical decision‑making
• Uphold strong engineering best practices in code quality, testing, observability, and continuous integration
• Apply full‑stack expertise across frontend, backend, APIs, and cloud infrastructure to build stable, scalable, consumer‑grade experience s.

Qualifications

• 7+ years of experience in full‑stack engineering roles
• Expertise with React (Next.js) and React Native for frontend development
• Advanced backend development experience with Go, Node.js, Nest.js, and Express.js
• Strong understanding of GraphQL, Apollo, and modern API architecture
• Proven experience with PostgreSQL and Redis in production environments
• Hands‑on experience deploying and scaling applications in GCP
• Experience working in product‑led or SaaS environments
• Ability to mentor junior developers and contribute to a learning‑focused engineering culture
• Strong collaboration and communication skills, with experience working cross‑functionally

Good to Have

• Experience with loyalty, payments, or high‑scale consumer platforms
• Exposure to microservices, distributed systems, or event‑driven architecture
• Familiarity with real‑time data patterns or customer engagement systems
• Experience working in high‑growth or startup environments
• Strong documentation habits and technical communication