David Grilli
Senior Software Engineer at Fonix
London, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolDavid Grilli is a Senior Software Engineer with 13 years of experience building resilient backend systems and developer tooling, currently based in London and working at Fonix. He has a track record of scaling high-throughput platforms—from supporting a 5M-user growth and handling 60k RPM to operating livestream and chat infrastructures—and has repeatedly cut costs and deployment times through pragmatic architecture changes. At unimal.jp he led services for web creators reaching 300 MAU, migrated systems from Heroku to AWS saving 30% in infrastructure costs, and delivered zero-downtime database migrations and faster CI/CD. He combines hands-on engineering with mentorship and cross-functional collaboration, onboarding junior teammates, teaching web development, and even organising team English classes. A lifelong learner with formal training in telecoms, networks, and new media design, he pairs systems-level thinking with product-minded execution. Outside of engineering he writes and speaks at local tech events, bringing clear communication to complex technical problems.
13 years of coding experience
16 years of employment as a software developer
Computer Engineering Programming Networking OS Database Compilers Software Security, Computer Engineering Programming Networking OS Database Compilers Software Security at UCAB - Universidad Católica Andrés BelloCisco Certified Network Associate (CCNA) OSI Model TCP/IP Routing Protocols WAN Wireless Networks IP EIGRP RIP2 VLAN Ethernet ACL, Cisco Certified Network Associate (CCNA) OSI Model TCP/IP Routing Protocols WAN Wireless Networks IP EIGRP RIP2 VLAN Ethernet ACL at Cisco Networking AcademyNew Media Design Information Technology, New Media Design Information Technology at Télécom ParisHigh School Maths Biology National Geographic Physics Chemistry English Religion Universal History, High School Maths Biology National Geographic Physics Chemistry English Religion Universal History at Colegio Nazaret
English, Spanish, Japanese
Stackoverflow
1,480reputation
214kreached
6answers
0questions
css
top-5%
html
top-5%
twitter-bootstrap
top-5%
Github Skills (125)
authentication10
cross-platform10
android10
ios10
react-native10
react10
database9
appstore9
html9
twitter-bootstrap9
devise9
native-module9
cordova9
css9
oracle9
Programming languages (10)
Github contributions (5)
djGrill/djgrill.com
Aug 2012 - Mar 2023
Contributions:201 commits, 9 PRs, 17 pushes in 10 years 8 months
djGrill/british-binary-coins
Feb 2019 - Mar 2025
BBC: simple JavaScript application that given a number of pennies will calculate the minimum number of Sterling coins needed to make that amount -
Contributions:9 PRs, 11 pushes, 7 branches in 6 years 1 month
javascriptbbcminimumnodejscalculate
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