Personal Summary
15 years+ experienced software engineer mostsly focused on Scala/Java/Kotlin (JVM) solutions. I'm an enthusiastic polyglot and fast learner capable of leading, mentoring, or working with a team to help deliver business value. I worked in startups and large companies so I understand the importance of delivering solutions to provide value and not over engineer while releasing good high quality software.
Skills & Proficiency
Backend
Haskell
Scala
Java
Kotlin
Typescript
Devops and tooling
AWS
Docker
Kubernetes
Linux
Frontend
Typescript
React
React Native
Redux
Mobile
Android
iOS
Flutter
Work Experience
Working in the commerce team of SiriusXM. Developed microservices to manage orders, subscriptions and entitlements.
- Worked in an event driven, highly scalable and global system built from scratch. Used AWS cdk, dynamodb, lambda, kinesis
- Stripe integration as a payment system and subscription manager
- All microservices made use of Scala 3 and cats effect, having built everything using tagless final
- Built libraries to made the code more correct at typelevel such as NonEmptyString, PositiveInt, Interval
- Built a library with a typeclass that sends tracing data to datadog automatically
- Built macros to auto derive typeclasses, ie Arbitrary of scalacheck
- Built a custom e2e test suite running on docker + localstack that tests almost in a e2e manner the whole service without deploying in aws and mocking external dependencies
- Made use of aws smithy to define and implement api contracts
Worked in a crossfunctional crew that took care of 2 Haskell monoliths and a few microservices adding up to one million lines of code using a custom CQRS + ES solution
- Develop & maintain complex credit policy rules that accept/reject mortgages based on customer's data
- Designed a restful API to integrate Habito's affordability calculations with a 3rd party vendor
- Identified a gap in internal tooling and built a few web forms to make the operations team autonomous
- Designed and coordinated processes to update mortgage products (application state) in production without downtime
- Created a lot of documentation around the different subdomains on the lending platform
- Provide training/support to peers to get onboarded on the team quickly
Worked in a full stack team while promoting XP practices and delivered features
- Developed and architected the customer referral system
- Developed a full landing page with a tight schedule
- Worked on components and screens that worked on both react and react native
- Introduced some functional programming style on one of the Java BEs to help with some complex domain modeling
- Trained team on feature toggles and how to develop in a trunk-based development style
- Organized Haskell sessions on the reading club to help distribute functional programming knowledge across teams
Worked as part of the brokerage crew(s) to deliver features while adapting for the 1st time to a real production system built using Haskell
- Extracted three services within the same subdomain out of the monolith
- Worked closely with the operations team to get as much knowledge as I could about affordability calculations
- Deployed ingress for Kubernetes to allow inter-cluster communication
Codurance provided me with an environment to grow and develop as a professional. Since the beginning, I needed to work with different crews with different programming languages at different locations.
- Developed a few web apps using React + JS and Typescript
- Developed an article search engine using elastic search
- Provided internal talks on Functional programming in Scala
- Provided training on TDD & Testing for M&S (UK)
- Provided an intro to AWS for Mango (Barcelona)
Worked in a strong XP practices environment. Worked solely for the Channel 4 app
- Developed & architectured the whole My Channel 4 experience from scratch
- Introduced full integrated tests running against different real mobile phones
- Developed a good amount of features using outside-in TDD
- Developed Rx workflows within the application to handle android activity state(s)
Worked on the main IG stock trading app
- Rearchitectured the way the application handled state since there were memory leaks around
- Introduced a good amount of unit/integration tests to cover the main workflows
- Coordinated work across the different teams (India and Poland)
Worked on the Moni currency exchange app
- Rebranded the application with a completely different style using the material design guidelines
Worked as the sole Android developer
- Architectured and written the application from scratch alone
- Followed the clean architecture principles to make an extensible app
- Introduced unit/integration tests
- Introduced a CI pipeline to build android artifacts
- Gather requirements from stakeholders and architect technical solutions along with implementation details
- Maintained crash-free users of the app at around 99.7%
- Delivered versions every 1-2 weeks since the beginning
Delivered a lot of features and multiple mobile apps
- Architectured and written from scratch the Android app BBVA (Spain)
- Architectured and written from scratch the Android app BBVA Compass (USA)
- Delivered a major version of the Android app BBVA Vivienda (Spain, real estate)
- Architectured and written from scratch an Android Twitter client that measures user's influence
- Created chart components for BBVA Research (iOS) using canvas
- Created custom components from scratch using canvas to make animations more performant
iOS and Android app development
Worked on the 'Orion Clinic' project. A hospital management application that's managing a few hospitals in Valencia
- Worked with Java swing, Websphere 6/7
- Worked on a query migrator at the runtime that translated JDO to JPA
- Worked on the performance of database access that was degrading vastly the experience
Worked on the main edinn app
- Migrated a visual basic 6 application to php + javascript
- Worked on the main edinn app written in Java + Swing
Web developer
Projects
dotfiles -
My system configuration, among some scripts and utilities
timebox-evo-api -
This projects spins an API to control a Divoom Timebox Evo via bluetooh. Uses TS + fp-ts
Simracing DIY wheels -
Created two wheels from scratch with my 3d printer, some arduinos and my soldering iron.
FxCalendar -
Discord bot written in JS that publishes the economic events and market performance for the day in a discord channel
Clean contacts -
This is not a library, this is a sample implementation of Clean architecture in Android. Currently I'm working with this architecture and I think the code becomes well structured, decoupled and maintainable, in summary, it follow the SOLID principles. This is a sample repository that I used in my talk “My way to clean Android”. It has around 60% code coverage and uses Travis CI to run the unit/instrumentation tests
Publications
Introduction to Clean Architecture on Android
Introduction to Clean Architecture on Android