
Peter San Andres
Full Stack Engineer
Salary / Daily rate
Berlin, Germany
Freelance, open to permanent contract
Skills
About me
Intro
Senior Fullstack Engineer with 8+ years of experience building scalable, AI-enabled web applications across SaaS, healthcare, and marketplace domains. Expert in React, TypeScript, Node.js, and Python (FastAPI) with strong experience designing RESTful APIs, microservices architectures, and high-performance systems. Proven track record of collaborating with cross-functional teams to deliver user-centric, production-grade software, with a strong focus on clean architecture, testing, and maintainability. Experienced in AI-assisted development workflows and integrating intelligent features into applications, aligning closely with modern AI-driven product environments.
Work experience
Senior Full Stack Engineer
ZEISS Digital Innovation
May 2021 - Present
5 years 6 months
Thale, Germany
– Designed and developed fullstack features for a telemedicine platform, improving user experience for healthcare professionals. – Built scalable frontend systems using React, Next.js, and TypeScript, focusing on performance, accessibility, and maintainability. – Developed backend services using Node.js (NestJS) and Python-based services, designing clean and scalable REST APIs. – Architected microservices-based systems, improving modularity and enabling independent service scaling. – Optimized API performance by 40% through query optimization, caching (Redis), and database tuning (PostgreSQL). – Implemented automated testing pipelines (unit & integration) and enforced code quality via peer reviews. – Collaborated closely with product managers and designers to translate business requirements into scalable solutions. – Contributed to CI/CD pipelines and Docker-based deployments, improving release efficiency and reliability. – Integrated AI-assisted workflows and intelligent features to enhance user-facing capabilities.
Senior Software Engineer
Hack Quest
Jun 2018 - Mar 2021
2 years 10 months
Thale, Germany
– Developed a large-scale travel booking platform serving thousands of users daily. – Built responsive frontend applications using React and TypeScript, focusing on UX and performance. – Designed and implemented RESTful APIs using Node.js and Express, ensuring scalability and reliability. – Implemented authentication systems (JWT, OAuth) and secure data handling practices. – Built real-time systems using WebSockets and event-driven architecture. – Worked cross-functionally with product and design teams to deliver high-quality features rapidly. – Participated in code reviews, architectural discussions, and agile development cycles.
SynFutures
Sep 2014 - Jun 2018
3 years 10 months
Thale, Germany
Full Stack Developer
Jun 2016 - Jun 2018
2 years 1 month
Thale, Germany
– Developed an e-commerce platform using MERN stack (MongoDB, Express, React, Node.js). – Built and maintained REST APIs and frontend interfaces, ensuring seamless integration. – Designed optimized database schemas and improved query performance. – Migrated legacy systems to cloud infrastructure (GCP). – Collaborated in Agile teams, contributing to sprint planning and delivery.
Software Developer Internship
Sep 2014 - Jun 2016
1 year 10 months
Thale, Germany
– Contributed to a SaaS analytics platform by developing frontend dashboards and backend APIs. – Supported testing, debugging, and feature development in a collaborative Agile environment.
Education
SRH Berlin University of Applied Sciences
Bachelor, computer science
2010 - 2014
4 years 1 month