Open to opportunities

Steve Sato

@stevesato

Message

Senior software engineer delivering cloud-native full-stack platforms with AI/ML and compliance focus

Canada

Message

What I'm looking for

I'm seeking senior engineering roles building secure, cloud-native, AI-enabled full-stack platforms where I can lead architecture, mentor engineers, improve observability and compliance, and drive end-to-end delivery.

I am a Senior Software Engineer with 10+ years building scalable full-stack systems across fintech, e-commerce and enterprise SaaS. I lead architecture modernization, transition monoliths to microservices, and deliver secure cloud-native platforms using React, Next.js, Node.js and PostgreSQL.

At KOHO I built admin portals, a prompt lifecycle management tool, and a drag-and-drop rule engine that cut manual ops by 40% and reduced fraud false positives by 17%. I champion CI/CD, Terraform infrastructure-as-code, observability and mentoring, and drive technical initiatives from concept to delivery.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Koho

Jan 2023 - Aug 2025 (2 years 7 months)

Led development of a dynamic admin portal and prompt lifecycle tools for LLMs, and architected a drag-and-drop rule engine, reducing manual ops requests by 40% and lowering fraud false positives by 17%. Implemented real-time AI score viewers, role-based controls, and CI/CD pipelines to improve security and delivery cadence.

React Next.js TypeScript PostgreSQL GraphQL Redis Terraform CI CD

Senior Software Engineer

Modis

May 2020 - Dec 2022 (2 years 7 months)

Delivered a high-scale multi-vendor e-commerce platform and real-time checkout systems, reducing abandoned carts by 22% and refactoring REST to GraphQL to cut frontend data load time by 35%. Built vendor analytics and improved CI/CD and API security across portals.

Vue.Js PostgreSQL GraphQL WebSockets Stripe CI CD JWT Express

Full Stack Developer

Modis

Jan 2018 - Apr 2020 (2 years 3 months)

Led full-stack delivery of client-facing apps across fintech and retail, and built an internal time-tracking and invoicing platform that reduced finance overhead by 40%. Developed reusable component libraries and real-time dashboards to improve dev efficiency and shipment tracking accuracy.

React Angular Vue Django Docker Compose Socket.IO MongoDB CI CD

Backend Developer

Marlabs LLC

Aug 2015 - Dec 2017 (2 years 4 months)

Built core APIs and microservices for logistics and banking apps using Node.js and Django, and designed data pipelines that reduced manual reconciliation by 60%. Implemented OAuth2 authentication and monitoring with Datadog to support high-throughput transactional workflows.