Open to opportunities

Weijian Wang

@weijianwang

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Senior software engineer specializing in scalable cloud web services, frontend engineering, and AI integrations.

Canada

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What I'm looking for

I seek senior engineering roles building scalable, AI-enabled web products at companies valuing cross-functional collaboration, engineering excellence, and measurable impact.

I am a Senior Software Engineer with extensive experience architecting and shipping high-performance, cloud-based web services and front-end platforms. I take ownership of end-to-end delivery, from design and implementation to production operations, emphasizing quality and engineering excellence.

At large tech companies I have built React/TypeScript front ends, Node.js backends, and ML/NLP-driven features that improved intent detection, engagement, and performance metrics. I have led small teams, collaborated cross-functionally with product, UX, and data science, and delivered production systems supporting millions of users.

My work spans modern dev stacks—containerization, Kubernetes, CI/CD, observability, vector search, and RAG pipelines—resulting in measurable improvements like lower time-to-interactive, reduced release cycle time, and higher engagement. I prioritize accessibility, security, and scalable system design in every project.

I am passionate about building AI-enabled, user-centric products and mentoring teams to adopt best practices in testing, monitoring, and performance optimization to drive business impact.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Amazon

Jul 2021 - Present (4 years 7 months)

Architected and developed a large-scale eCommerce front-end platform serving >10,000 monthly users, reduced page load to <100 ms and lowered Time-to-Interactive by 20% while integrating RAG-based search and NLP workflows to improve intent detection by 15%.

React TypeScript NLP RAG Supabase Docker Kubernetes

Software Engineer II

Microsoft

Jun 2020 - Jul 2021 (1 year 1 month)

Built a high-traffic e-commerce front-end using React/Next.js serving >1M MAU, increased engagement by 15% and implemented CI/CD pipelines that reduced release cycle time by 30%.

React Next.js TypeScript TensorFlow JS GitHub Actions Kafka Docker Kubernetes

Senior Software Engineer

PlayStation

Oct 2018 - Mar 2020 (1 year 5 months)

Led end-to-end development of a React-based Wishlist UI for ~100M users, implemented client-side caching and virtualization to keep p95 latency under 200 ms and deployed services on Kubernetes with auto-scaling.

React Express Cassandra WebSockets Kubernetes Grafana

Software Engineer II

PlayStation

Nov 2017 - Sep 2018 (10 months)

Developed a React EPG front-end aggregating millions of TV listings and built high-throughput Kafka ingestion pipelines while optimizing search relevance with NLP embeddings.

React Kafka Solr NLP Docker AWS ECS Monitoring

Software Engineer II

LeEco US

May 2016 - Nov 2017 (1 year 6 months)

Designed and built a high-volume refund management portal with React and TypeScript handling millions of transactions monthly, optimizing MySQL queries to cut transaction latency by 30%.

React TypeScript MySQL RESTful APIs Agile Performance Optimization