Backend Engineer - Integrations

Backend Engineer – Integrations (Remote – Asia)

Location: Remote

Team: Integrations Engineering

Reports to: Engineering Manager, Integrations

About Kintsugi

Kintsugi is a leading innovator in the fintech space, redefining how businesses manage sales tax compliance. Our AI-powered platform simplifies one of the most complex and painful aspects of running a business—sales tax calculation and filing—so our customers can focus on growth, not bureaucracy.

As a remote-first company, we believe in asynchronous collaboration, ownership, and continuous learning. Our Integrations Engineering team plays a critical role in connecting customer data sources to our core platform, enabling rich insights and seamless automation.

The Role

We're looking for a Backend Engineer to join our Integrations team and help build the infrastructure that powers smooth, reliable data flows from third-party services into Kintsugi. You'll work on secure, scalable, and well-documented integrations with platforms like Shopify, Stripe, and QuickBooks, helping users get up and running faster with less friction.

This is a hands-on engineering role focused on backend systems and APIs. You'll collaborate closely with product, design, and QA while contributing to a team culture that emphasizes clean code, fast iteration, and deep user empathy.

What You'll Do

• Design and build scalable, serverless integrations that connect external platforms with Kintsugi's core APIs.
• Write and maintain well-structured, well-tested backend code using Python, FastAPI, and AWS Lambda.
• Collaborate with QA and product teams to ensure integrations meet high standards of security, observability, and reliability.
• Help shape the technical architecture for integrations—balancing speed and scalability with maintainability.
• Participate in code reviews, contribute to internal tooling, and continuously improve developer experience within the team.
• Stay up to date with third-party APIs, industry best practices, and evolving customer needs.

What We're Looking For

• 3+ years of backend development experience, ideally building APIs or integration layers.
• Proficiency with Python and FastAPI (or Flask) in production environments.
• Familiarity with AWS Lambda, S3, RDS/Postgres, and serverless application patterns.
• Experience working in agile, remote-first teams—bonus points if you've worked with geographically distributed collaborators.
• A passion for code quality, test coverage, and documentation.
• Strong communication and collaboration skills—you enjoy working across functions and time zones.

Bonus Points

• Experience working with third-party APIs (e.g., Stripe, Shopify, QuickBooks, Xero).
• Knowledge of CI/CD pipelines, containerization (Docker), and infrastructure-as-code tools (e.g., Terraform or CloudFormation).
• Prior work in fintech, accounting, or compliance-focused domains.

Why Join Kintsugi

• Join a mission-driven startup simplifying tax automation for modern businesses.
• Work on meaningful problems that have real-world financial impact.
• Collaborate with a thoughtful, experienced engineering team and take ownership of high-impact projects.
• Enjoy a flexible, fully remote work culture with opportunities for growth and mentorship.