Business angel, seed investor and tech advisor in several startups: - Powderbeauty.com - Gamersfy.com - Velca.com - Planetdataset.com - inviertispro.com

Creating the software & data engineering team (from Pre-Seed to Series A). - Set engineering practices and tooling for continuous improvement culture: deployments/rollbacks, testing, planning, monitoring/alerting, etc. - Design and implement the whole software stack of the company: API layer, databases, 3rd party integrations, cloud infra, mobile app, etc. - Architect and implement a high-throughput, fault-tolerant system to synchronize Shopify entity model with the data warehouse in near real-time. - Single data engineer working on: datawarehouse definition, data pipelines, data quality and monitoring, semantic search and recommendation models: (AI sentence transformers, vector/embedding databases, LLMs with RAG...) - Set no-code strategy to democratize internal apps creation. Chose Retool as no/low-code tool, deliver trainings on Retool, basic JS, and SQL. 35 internal tools created by non-tech teams in the first 2 months. - Set the strategy for mobile apps: chose ReactNative to deploy iOS/Android apps with one single developer in just 2 months.

“RESTful APIs development” and “iOS development” subjects.Acting as mentor, advising and guiding students in their career path.

Leading all software engineering efforts in the company.Started as technical co-founder until post-acquisition stage. - As first (data) engineerI implemented the first versions of the data platform: following DataOps principles, created main pipelines and ETLs, set up cloud infra (GCP, DataFlow), data governance & metadata infra, monitoring and alerting, data-lake definition, ML models deployments, continuous web-scrapping efforts. Serving KPIs in production from big datasets (billions of rows) with only 2 major outages in 5 years. - As managerClose care of ICs and engineering managers (15 ICs, 4 EMs): weekly 1-1, personal growth plan, conflicts resolutions, mentoring and coaching, and everything needed to keep the team motivated, retained, and continuously learning and growing. Also contribute to product planning, cost/benefit trade-offs, identify and breakdown dependencies. Depending on the stage of the company, I balanced towards maximizing delivery, quality, market-fit or performance.

Head of Mobile & Headless (APIs) products - Founded my own project and team: Liferay Screens. - Designed and coded from scratch the architecture and component library for Liferay Screens: both - iOS (ObjC and Swift) and Android (Java and Kotlin) versions. - Introduced functional programming techniques both in server and apps code. - Guild Lead in a distributed team of 10 engineers (US - Brazil - Spain).

Managed 4 technical teams (up to 20 people). Responsible for high-level architecture, agile/lean processes, hiring, mentoring, motivation and day-to-day support. Working together with the team as any other developer. - Mobile apps (iOS & Android) and mobile web developed from scratch in 2 months. - Designed an architecture based on Java, Scala and Akka. Transition from monolithic design to new - architecture based on distributed micro-services (actor model based). - Performance dramatically improved: concurrent clients improved by 10x.

Worked as iOS lead developer in a distributed team of 5 people (NYC, Atlanta, Sweden and Spain).Developed the whole uploader subsystem, which was able to intercept, analyze, optimize and send new photos taken with the iPhone in terms of BigData.Acquired by https://www.theknot.com/

Educational resources platform for childrenFrom zero to working product in 6 months: iOS app and backend.Product demo-ed to several potential clientsAchieved Partnership with Imaginarium

Developed and managed of all kind of mobile-related software products.As technical lead:Developed more than 50 iOS/Android/JavaME apps and games using agile methods.Developed back-end counterparts for mobile clients (RoR, Play framework). Most of them deployed on the cloud (Heroku and AWS EC2)Setup of all internal development tools: SCM, metrics, automation, testing...As manager:Company-wide implementation of processes based on agile paradigms: CMMI ML-2 achieved in 7 months.Hired and mentored a high-performing team(some engineers are currently working for some FAANGs).Founded a new spin-off in New York. Several business travels.

Personal website, writting and publishing contents about programming (Win32, Information Retrieval, Internet protocols, Unit testing, Borland tools, etc.) and some other sutff.Currently discontinued but one independent mirror could be found at http://www.sjover.com/jm/

Developed low-level libraries and Windows applications. - Wrote a digital signature and encryption library (cryptLib and CryptoAPI). - Specified, designed and coded Information Retrieval systems with C++ - Developed my own port of CPPUnit for Borland C++Builder.

Developed Windows desktop applications for lawyers.Advanced use of Win32 API in order to fine-tune the applications developedCollaboration with local university in research projects (information retrieval, C/C++)