Profile

Another portrait of David LJ wearing the same and in the same pose. But appears surprisedA portrait of David LJ. Slightly smiling. Wears 80'ish glasses and a green and black plaid shirt
Hey! ๐Ÿ‘‹ Nice to see you again
David LJ@davidlj95
Senior software engineer

Professional experience

Vesto logo Vesto Senior Backend Engineer Oct 2022 โ†’ Jul 2023 ๎ฃน
Summary Highlights Tech
Backend: web APIs and background processing. Led, engineered and assisted many product features. Planned robustness proposal to improve the app stability by reducing error rates. Focusing on gaining observability to push for data-driven decisions. Optimized processes to reduce customer support workload
Koa Health logo Koa Health Senior Software Engineer Oct 2020 โ†’ May 2022 ๎ฉง ๎‹‹
Summary Highlights Tech
Full stack: web APIs backend, web app and mobile app. Led, engineered and assisted several features. Coordinated with product, design, QA, DevOps, cybersecurity, research & other products' engineering teams. Enhanced the company's design system library. Supported several squad's processes improvements
Telefรณnica Alpha logo Telefรณnica Alpha Software Engineer Mar 2020 โ†’ Oct 2020 ๎ฉง
Summary
Part of the health moonshot unit. Which would later spin off to become its own company: Koa Health. Check that position for more information about both periods
BTC Assessors logo BTC Assessors Software Engineer Jun 2018 โ†’ Dec 2019 ๎ฉง ๎˜™
Summary Highlights Tech
Full stack: web apps and peer to peer / web API backends. Lead software engineer for all company's projects. Blockchain / DLT consultant and researcher. Board member of the company's own cryptocurrency investment fund as technical advisor
SEAT logo SEAT Software Engineer Mar 2017 โ†’ Jun 2017 ๎ฃน ๎ Œ
Summary
Organized integration of IBC Biomechanics software within SEAT IT systems. In order to be used for its internal biomechanical laboratory in the CARS center inside Martorell headquarters
Meditrauma logo Meditrauma IT Manager Jan 2015 โ†’ Jun 2018 ๎ฃน
Summary Highlights
Administered IT systems and infrastructure of each of the three company branches. Performing systems administration tasks and general IT consultancy
IBC Biomechanics logo IBC Biomechanics Software Engineer Sep 2014 โ†’ Jun 2018 ๎ฃน ๎˜™
Summary Highlights Tech
Developed a reporting application. Created several proofs of concept apps to connect to biomechanical devices using Bluetooth. Managed the IT systems of the company

Education

Universitat Oberta de Catalunya logo UOC Master's degree MISTIC (Cybersecurity) Sep 2017 โ†’ Sep 2018
Score Courses
Unfinished. 8.14 over 10 (3.38 over 4 GPA)
Universitat Autรฒnoma de Barcelona logo UAB University degree Computer Science Sep 2013 โ†’ Jun 2017 ๏š 
Score Courses
Cum laude. 8.86 over 10 (3.85 over 4 GPA)
Institut de Mollet del Vallรจs logo IES Mollet High school Science and Technology Sep 2011 โ†’ Jun 2013 ๏š 
Score Courses
Cum laude. 9.76 over 10 (3.96 over 4 GPA)

Projects

Vesto app logo Vesto app Senior Backend Engineer Oct 2022 โ†’ Jul 2023 ๎กต
Description Tech
Worked on backend stack. Mobile app to introduce users to the world of financial investments. Allows to easily invest in US stock market with card or Bizum. Focused for Spanish market
Mindset logo Mindset Senior Software Engineer Mar 2020 โ†’ Jun 2022 ๏ˆ’
Description Tech
Worked in full stack. Mobile app for patients to treat depression using Cognitive Behavioral Therapy (CBT) exercises. Web app for therapists to track patients' progress
Cowstamp logo Cowstamp Lead Software Engineer Jul 2019 โ†’ Dec 2019 ๏ˆ’
Description Tech
Worked in full stack. Web SaaS app to create, issue and receive verifiable credentials digitally signed using blockchain technologies with a user-centric design. Uses a custom ad hoc library to canonize JSON-LD graphs
 Kowbucha Lead Software Engineer Nov 2019 โ†’ Dec 2019 ๎—ƒ
Description Tech
Web app to allow an independent verification of Blockcerts verifiable credentials based upon users' trust decisions. Uses a companion NodeJS & browser Javascript library created ad hoc to perform the verifications.
NodeCenter logo NodeCenter Software Engineer Jan 2019 โ†’ Sep 2019 ๏ˆ’
Description Tech
Worked in full stack. Application to manage blockchain / DLT nodes deployments in few clicks with an easy to use web interface, based on an Open API documented REST API exposed by a companion app daemon
Bitcoin Framework logo Bitcoin Framework Lead Software Engineer Jul 2017 โ†’ Dec 2018 ๎กต
Description Tech
Bitcoin library to create transactions with smart contracts (scripts) based on puzzle-friendliness and object oriented programming (OOP)
IBC Report Generator logo IBC Report Generator Lead Software Engineer Sep 2015 โ†’ Feb 2018 ๏ˆ’
Description Tech
Worked in full stack. Desktop application to generate biomechanics reports out of data extracted from third party applications and devices using user-created report templates
Police Translator logo Police Translator Lead Software Engineer Jun 2014 โ†’ Nov 2015 ๏ˆ’
Description Tech
Worked in full stack. Hybrid mobile application with a collection of useful phrases for police officers translated between English and Catalan. Includes audio pronunciations and supports offline mode. Custom contents manager as web application

Languages

{es} Spanish Native {ca} Catalan Native {en} English Advanced

Certified B2 CEFR level