Open to opportunities

Lucy Ru

@lucyru

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Full Stack Developer specializing in Node.js, TypeScript, PostgreSQL, and React.

Greece

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What I'm looking for

I seek roles where I can lead engineering efforts, improve system reliability, mentor teams, and deliver scalable end-to-end features in collaborative, R&D-focused environments.

I am a Full Stack Developer with 8 years of experience building reliable, maintainable, and scalable end-to-end features for biotech and enterprise systems. I have led teams and maintained production environments across projects ranging from single-service apps to 20+ microservice systems.

I specialize in Node.js, TypeScript, PostgreSQL, and React, and I apply software engineering best practices including test coverage, code reviews, CI/CD, and performance optimization—once accelerating search queries by 70% and reducing file access times by 50% for large scientific datasets.

I enjoy collaborating across distributed international teams, mentoring developers, driving architectural improvements, and delivering impactful solutions for R&D and product teams while ensuring high system stability and rapid feature delivery.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Quantori

Jul 2020 - Nov 2024 (4 years 4 months)

Led development and team leadership on biotech R&D web applications, optimized PostgreSQL queries to accelerate search by 70%, and redesigned services to speed feature delivery by 50% while ensuring high production stability across multiple projects.

TypeScript PostgreSQL React REST APIs TypeORM Docker CI CD Microservices

Backend Engineer

T-Systems

Jul 2016 - Jul 2020 (4 years)

Developed microservices for telematics user and customer management, refactored monolith to microservices, and reduced technical debt by 20% while supporting a large distributed team.

Java 8 Spring Framework PostgreSQL Docker Microservices Git

Frontend Engineer

Quantori

Delivered frontend features and robust client-side validation with full unit test coverage to present scientific compound data clearly, improving data discoverability for research users.

React TypeScript GraphQL Jest Git Agile

Full Stack Engineer

Quantori

Implemented dataset aggregation reducing file access time by 50%, migrated legacy code to ES6/TypeScript with tests, and contributed to backlog reduction by fixing 180 bugs in five months to improve system stability.

JavaScript TypeScript PostgreSQL Databricks React Jest Docker GitHub Actions

Team Lead

Quantori

Architected and delivered an on-premise SaaS MVP using Gemini AI and AWS S3 that accelerated presentation creation workflows 5x and led a small cross-functional team through research and delivery.

NestJS TypeScript AWS S3 PostgreSQL Terraform CI CD

Backend Engineer

Quantori

Built ETL parser and Jenkins CI/CD pipeline to automate file processing and deployments, reducing development cycle time by 30% and maintaining strict SLA for production fixes.

Java 8 PostgreSQL Jenkins CI BASH ETL Git