David Hagege

Extraordinary Software Development Services

- Joynetiks provides top-notch software development and consulting services to companies of all sizes, with a focus on bringing Joy to everyone involved.

Agritech: Transformed a struggling ~40 person, ~12 nationality startup into an AgriTech leader in SEA. Building production AI systems serving 40,000+ users with satellite imagery, weather forecasting, and IoT solutions for crop health and yield estimation.

- Led the redevelopment of a 4 years old mobile & web app with 40,000+ users in 5 months.

- Built a forecasting weather API using SQL-based interpolation on hundreds of millions of rows, delivering 2-year global weather predictions at any coordinate

- Developed a production RAG pipeline enabling farmers to mass create farming activities via natural language prompts instead of forms, completely eliminating form fatigue.

- Developed an IoT platform for tractors that drastically reduced billing and management errors

- Radically changed how the organization was working by promoting maximum Gitlab use and asynchronous communication. Gone from multiple meetings a day to around one meeting a week.

- Established Nix/NixOS as the standard for dev environments and deployments, reducing onboarding from days to minutes and fixing dependency hell.

- In my first month, I also reduced the number of repositories by 90% and redesigned the infrastructure to minimize the use of microservices

- Built a scalable pipeline using PubSub & cloud functions for satellite image fetching (100,000+ images/day) and worked closely with researchers to integrate their ML models in production

- Conducted 4+ hours of daily code reviews across the team, improving code quality and upskilling all engineers

- Built an employee handbook in Hugo that became the primary onboarding resource and company-wide documentation hub

AR mobile apps / shopping platform

- Implemented robust development processes, including CI and testing, to improve efficiency and code quality on a previously disorganized project.

- Initiated the migration from Firestore to SQL on GCP (contributing to firebase in the meantime), successfully designed and built the entire backend for the app.

- Guided and mentored other engineers in making informed decisions and delivering high-quality work.

Japanese HR company that operates Doda.jp. As the tech lead of their HR Tech team, I was responsible for modernizing their systems.

- Developed a chrome extension that significantly improved the efficiency of recruiters and saved the company millions of yen.

- Identified and remedied multiple security vulnerabilities in the company's servers and processes.

- Set up and supervised Kubernetes clusters with Terraform on GCP to provide easy deployment of all their services. Implemented SSO to protect their services.

- Created a new website from scratch using React and Rails with Elasticsearch integration, providing a faster and more effective search experience that was fully synchronized with the company's Salesforce system.

- Made all technical decisions and adhered to strict compliance regulations.

- Introduced automatic testing for the engineering hiring process, resulting in a 80% reduction in the number of applicants and saving hours of interview time.

A famous Japanese HR company. Scala and ruby on rails development.

- Worked on Vibe.work, a tool to analyze your team's morale with machine learning.

- Developed a highly popular team building platform (https://ludo.team), which continues to have over a thousand active users per month and has attracted clients such as Electronic Arts and BestBuy.

- Implemented an RPA solution that saved the company nearly 1 million USD annually.

- Mentored coworkers in Ruby on Rails and provided programming instruction to non-technical team members.

- Created enscalator, an open source tool for generating AWS CloudFormation templates, saving hundreds of hours of DevOps work within the team.

- Developed web crawlers to efficiently crawl and index hundred thousands of job postings from across the web.

Orange, the third largest telecom company in Europe. I had the opportunity to work in their labs in Tokyo and Seoul for a total of two and a half years.

- Developed Android apps with a Scala frontend and Ruby backend.

- Utilized a Kinect sensor to track consumer behavior and gather data on in-store customers.

- Designed a hot desk system using phones, wireless charging, and Miracast technology years before Samsung DEX, hacking my own Android ROM for seamless integration

- Worked on a solution for remotely controlling Android phones for technical support purposes.

Now owned by Seagate. Storage solutions, hard drives, NAS and accessories.

- Performed cross-platform development in C and C++ for Network Attached Storage (NAS) and Direct Attached Storage (DAS) systems on Linux, OSX, and Windows.

- Created a multi-user interface for managing LaCie's encrypted DAS devices with biometric recognition.

- Ported a NAS management software to Linux.

- Conducted a complete rewrite of a tool for formatting hard drives in various scenarios, including the introduction of a new capsule file system with LaCie manuals and tools.

Famous Pharmaceutical company. Cross-platform development in Python 2.4 of a child growth hormone prescription application used by physicians.