We're seeking a BillingEngineer to build next-generation, in-house metering andbillingplatform. Thebillingsystem should power complex, rapidly evolving pricing across subscriptions, usage, tiers, discounts, overages, and custom enterprise contracts. You'll be the primary contributor implementing event-driven pipelines, pricing/rating logic, and deepStripeintegrations. You'll work with other software engineers for key decisions while going hands-on inPython/Go services,Kafka-based event pipelines, and cloud operations across AWS (plus other cloud services).

I. Key Responsibilities

Design and implementKafka-backed metering and event pipelines
Implement pricing and rating logics. Encode plans, tiers, proration, discounts, custom contracts, and more. Should support mid-cycle price and plan changes safely.
OwnStripeintegrations. Implement Payments and invoicing, webhooks, retries, refunds, and reconciliation workflows.
Modelbillingdomain by developing data models for product catalogs, entitlements, and charge items.
Implement various payment strategies.
Ensure the accuracy of thebillingsystem and provide observability to the system.

II. Job Qualifications

Must have:

3+ years of backend engineering experience building production services.
Bachelor's or Master's degree in Computer Science, Computer Engineering, Electrical Engineering, or equivalent
Proficiency inPython; strong software design and code quality.
Experience with event streaming (Kafkaor similar) and distributed system concepts.
Hands-on experience integratingStripePayments & Invoicing (or equivalent payment platforms).
Strong SQL and data modeling skills; comfort with large-scale usage data and financial accuracy.
Experience with ClickHouse(or similar OLAP systems) for high-volume usage aggregation and analytics.
API design expertise with gRPC and REST: resource modeling, versioning, backward compatibility, authn/z, pagination, idempotency.
Cloud experience with AWS and familiarity with containers and CI/CD.
Clear written and verbal communication; ability to translate pricing/business rules into robust systems.

Nice to have:

Background in a fintech company or experience building in-house usage-basedbillingplatforms.
Knowledge of dunning strategies, dispute/chargeback workflows, and revenue assurance.
Experience integrating with cloud marketplaces (e.g., AWS marketplace), including private offers, SaaS/usage metering and entitlements, fulfillment APIs, and downstream invoicing.
Experience with infrastructure-as-code and security best practices.

II. Why We'll Love Working Here

1. Workplace

Join a vibrant, young, and dynamic team working on cutting-edge projects & emerging technologies.
Collaborate with global experts & top tech talent to enhance your skills.
Thrive in a culture of openness, forward thinking, and innovation-driven teamwork while encouraging your full potential.

2. Benefits Comprise

Competitive salary, 13th month salary, and attractive performance bonuses.
Flexible hybrid working model between working at the office and working at home (WFH 2 days per week)
Premium Healthcare and Accident insurance.
Annual health check package.
Free parking and allowances: Lunch, Marriage, Newborn baby, Bereavement, and others are applied.
A spacious pantry that is fully equipped with a coffee maker, fridge, microwave, and more for your most comfortable lunch time.
A wide range of sports and social activities: Yoga, Football, Badminton, Tech clubs, etc.
Annual company trip and teambuilding.
Chance to be honored quarterly and annually with recognition awards for individuals, teams, long-term service, etc.
Advanced English and appropriate soft skills training to assist your career development.
Engaging monthly events: Happy Gathering, Mini Game, Team Birthday Celebrations, Company's Year-end party, etc.
Exclusive company supporting funds to ease your personal loans of Home, Vehicle, Tuition, etc.

IV. Additional information

Location: QTSC 1 Building, Quang Trung Software City, Trung My Tay Ward (District 12), Ho Chi Minh City
Working Time: 8:30 AM 6:00 PM from Monday to Friday (Lunch break between 12:00 PM to 1:30 PM)

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