Open to opportunities

Mikael Son

@mikaelson

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Senior software engineer specializing in fintech and e-commerce microservices at scale.

United States

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What I'm looking for

I’m looking for a senior role where I can lead secure, high-scale fintech and e-commerce platforms—owning microservices, reliability, and AI/LLM fraud prevention—while mentoring teams and shipping revenue-impacting features at speed.

I’m a Senior Software Engineer with 12+ years of experience specializing in large-scale fintech and e-commerce systems, delivering end-to-end microservices, third-party integrations, and complex migrations that drive revenue, cut fraud, and boost conversions. At Amazon, I led Buy with Prime by building scalable Java/Spring Boot microservices, merchant-facing GraphQL APIs, and low-latency payment authorization, improving conversion and GMV through trusted fintech-integrated shopping.

I also integrate AI/LLM capabilities into backend services for advanced fraud detection, and I optimize user journeys with React/Next.js checkout experiences designed for reliability and PCI-compliant security. Earlier, at Robinhood, I helped build clearing and accounting platforms using Node.js/Express, Kafka, C#/.NET, SQL Server, and Go crypto security workflows, while strengthening quality through strong testing practices and mentoring 6 engineers across backend, frontend, and AI teams.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Amazon

May 2018 - Feb 2026 (7 years 9 months)

Led development of Amazon Buy with Prime using scalable Java/Spring Boot microservices, improving merchant conversions and overall GMV through trusted fintech-integrated checkout. Drove low-latency payment authorization and third-party LLM-based fraud detection, and reduced deployment effort by 60% while mentoring 6 engineers to accelerate feature delivery by 30%.

Java Spring Boot Microservices GraphQL DynamoDB Terraform React Next.js

Software Engineer

Robinhood

Dec 2014 - Mar 2018 (3 years 3 months)

Built Robinhood Clearing platform features using Node.js/Express microservices and Kafka event streaming to enable self-reliant trade clearing for millions of customers, removing third-party dependencies. Developed core accounting and real-time margin lending capabilities with C#/.NET, SQL Server, Redis, and Kubernetes, and strengthened reliability with extensive automated testing.