# Christian Haack

> Senior Full Stack Developer

Location: ,
Profile: https://flows.cv/christianhaack

## Work Experience
### Senior Full Stack Engineer @ Dwell
Jan 2018 – Jan 2022 | United States
• Created the apartment advertising website using Node / React and implemented few optimized solution like lazy loading that helps site touch over 90% in performance insights
• Developed IVR Studio call tracking flow using Twilio service that effected to improve 30% of call tracking efficiency
• Setup CI/CD flow using GitHub actions and AWS Code Pipeline service that helps to improve 10% of code testing speed
• Converted the JavaScript based react components Typescript that reduced 30% of bug fixing time
• Migrated the Redis broker to RabbitMQ for better celery tasks management that helps to increase 20% of queue processing time
• Analyzed 100KB of monthly server logs data to optimize server performance increased stability and decreased cost per cloud service by 10%
• Managed a 10-member cross-functional (engineering, QA, support) team and coordinated with three senior business partners toward the successful launch of an leasing platform

### Full Stack Engineer @ resmio
Jan 2013 – Jan 2017 | Nuremberg, Bavaria, Germany
• Managed to upgrade Python, Django version of back-end platform that improves code efficiency over 80%
• Conducted workload assessments and devised new operational processes that led to a 40% increase in productivity
• Migrated the modern server side rendering workflow to client side rending and Restful API that accelerated to a 30% increase in web app speed
• Created robust booking system that could handle 100+ concurrent buying request at very same time
• Launched wonderful landing websites for each facilities using Node / React which improves the site loading time over 20% comparing with modern jQuery based website
• Suggested the creative idea to build facility table organizing platform by few mouse clicks & drag drop that lead to 20% increase in facility registration process
• Collaborated with product and marketing teams to redesign the desktop app on-boarding process, improving retention and user experience by 40%
• Spearheaded redevelopment of front-end architecture, resulting in reduction of 20% in save/load time and 15% operation time


## Education
### Bachelor's degree in Computer Science
City University of Hong Kong
Jan 2009 – Jan 2012


## Contact & Social
- LinkedIn: https://linkedin.com/in/christian-haack-71193a233

---
Source: https://flows.cv/christianhaack
JSON Resume: https://flows.cv/christianhaack/resume.json
Last updated: 2026-03-29