Emanuel Calvo

Database and Software Engineering. IT Consultant.

Socials & contact me at:

GitHub Contributions

Current Positions
Education, Publications, and Cerfitications
Past Experience
Portfolio

Bio(graffiti)

Download my résumé. 📎

I’m currently a Database Engineer and Professional Services Technical Lead at OnGres. Working from platform engineering roles, development, consulting, and training.

I design and implement Databases in Production for top-notch companies, based on Open Source Technologies. From Deployment, Provisioning, CD/CI, and 2nd Day Operations to scalability, and performance. Software Engineering, mainly for database systems is also one of my core tasks.

Lectured talks in several Database and non-database related conferences, in various countries. Some of the slides can be found at my slides repository.

🇦🇷 🇪🇸

Technical Skills
A considerable experience on scalability, reliability, architecturing and maintaining large-scaled Database Systems, including but not limited to Postgres, MySQL, ClickHouse, and Elastic. Most of the systems are/were business-critical.
Experience in the following languages: Go, Python, C, Bash.
Extensive experience in modern SQL and custom indexing in Postgres.
Knowledge in Postgres Extensions development Framework and internals.
CI/CD for deploying Production Cloud-based and bare-metal infrastructure using Terraform/Packer, Ansible, GH Actions, Gitlab CI, Kubernetes, etc.
Experience in containerized services as in Kubernetes, Docker. Also heavy experience in Virtualization technologies.
Low-level knowledge of container technologies and programmatic image building with Earthly language, among other tooling.
Consistent experience in almost every mayor Cloud provider. Azure certified, GCloud, and AWS.

Soft Skills
A skilled communicator, managing Customer’s accounts worldwide.
Hard-problem solving, and with aveced dealing of complex Production incidents.
Develop engineering tools to ensure seamless operation and maximum efficiency.

Committed to my principles and values drives my work, and I collaborate with Argentinian non-profit organizations such as Apolo Foundation, Oportunidades Foundation among others to develop and support their IT ecosystems.

Current Positions

Ongres Inc. - Professional Services Tech Lead / Database Platform Engineer

Remote. New York/Madrid
Since September 2017 as OnGres, previously working as Consultant in 8kdata

As the Professional Services Technical Lead and Database Platform and Systems Engineering at OnGres, I am currently designing innovative system architectures to implement in our customers’ production clusters. In addition, I develop system tools to ensure seamless operation and maximum efficiency.

Highlighted projects:

BBM (Blackberry - Emtek - Google Cloud): Live migration from Oracle to full Patroni automated cluster, from a premise based environment to Google Cloud. PgBouncer-Consul-Postgres
Conrad (Google Cloud Partner): Full implementation of Patroni HA using etcd as consensus cluster, Load Balancing through Google iLB with API configuration with Patroni, and PgBouncer.
Gitlab Migration as part of the Database Reliability Team and Database Architecture design.
Postmates: Patroni Mult-project Terraform implementation with a centralized DCS.
Postgres vs MongoDB 10k U$S automated benchmark, IaaC (Hashicorp echosystem, AWS provider based).
Google Cloud as Partner.
ARM support and automation implementation.
Worked in the AWS’s Babelfish for Postgres team, as a Developer Advocate for the Open Source version.
- Provided patches, building, testing of Babelfish for Postgres.
- Lectured training for the team about the Postgres Hook Ecosystem.
Also provided trainings, and consultancy in a variety of customers such as Gitlab, American Express, Nutanix, BBM (Blackberry), Conrad Electronics, ARM, Microsoft, and Postmates.
stcpay Architecture design and Technical Leader of the Database Project.

Technologies:

Infra and CD/CI: HCL (Terraform, Packer), Ansible, Kubernetes, Docker.
Databases: Postgres (and flavours), MySQL, Oracle (to migrate out wink, wink)
Languages: Golang, Python, C, bash. Time to time I code in NodeJS.
Main Cloud Providers: Google Cloud, AWS, etc.

Open Source Databases Engineer | Software Engineer

Remote

Postgres, MySQL, ClickHouse, Elastic. Extensive experience in production environments, mostly in Linux/Unix environments.
Automated Cloud Infrastrucures.
HA, Performance, Monitoring,Debugging.
Go, Python, C, Bash engineering development.
Cloud and on-premise design and implementation.

Education

ESBA - Developer Analyst
Escuela Penintenciaria de la Nación (Juán José O’Connor) - 2000 - Criminal Sciences Degree

External publications

July 2nd, 2013: AWS - Postgres in AWS PostgreSQL running over EC2 instances with EBS/PIOPS storage. Minimum architecture, tips and advises. Download AWS in Postgres from local

Certifications

Other certifications related to DataScience Specialization:

Past Experience

ViaDB

Buenos Aires, Argentina
December, 2021 - November 2023 (closed)

I was the founder of ViaDB, specialized in consultancy and tool development for Open Source Databases, using a variety of programming languages including Go, Python, and Bash. The shop has been closed its operations in 2023 due to relocation.

ViaDB was an Open Source Database Support and System tools development indie-company. Closed due to relocation. See more at ViaDB.

ViaDB Customers

Maper (Argentina)
Openpass (Argentina)
Mural (Argentina)
Frávega (Argentina)
iMedicare (USA)
Eloquentix (US)
8kdata (Madrid)
Avalon Informática (Madrid)
Init (País Vasco)
Scienza (Argentina)
Syscope (Argentina)
Mexane (Argentina)
Contenta Mobile (Argentina)
Slots Machines (Argentina)
TreeLogic (Asturias)
BTS (Usa - Zaragoza)
LCRCOM.net (Madrid)
Autofarma (Argentina)
VsTour (Argentina)
CycleLogic (Argentina)
Ericsson/EDB (USA)
Pic-pic (USA)
PFA (Argentina)
Jampp (Arg/USA)
Contenta Mobile (Argentina)
Slots Machines (San Luis, Argentina)
Pampa Business Solutions (Argentina)
Sindicato de Pasteleros y afines (Argentina)

Percona - Senior Technical Services Engineer

Buenos Aires, Argentina
August 2016 - September 2017

Full description of the role here.
At Percona, I worked as a Remote DBA position at Atlas team. The core techology was MySQL and MariaDB, for large scale infrastructures.
Deep understanding of the replication protocol, availability, and sharding.
Some highlighted customers: Hyperwallet, Fitbit, Lookout, Shipwire

8kData - Data External Advisor

Madrid, Spain
January 2016 - September 2017

External technical advisor and consultant for Postgres and other related technologies.

UDE - Open Source Source Undergraduate Degree Associate Professor

La Plata, Argentina
June 2016

Open Source Source Undergraduate Degree Associate Professor, PostgreSQL Database specialist.

Pythian - Technical Team Lead - ACTG (Advanced Consulting Team Group) Member

Ottawa, Canada
January 2015 - June 2016

Support to Pythian’s External Profile.
Member of the Advanced Consulting Team Group (PostgreSQL).
Other Technologies: MySQL/MariaDB, xtraDB, Galera, Docker, Ansible, MongoDB, PostgreSQL, Vertica, Oracle.
Part of the ACTG for PostgreSQL implementations, solutions and architecture.
Lead Database Consultant at T73.

Some highlighted customers: Microsoft, Beats (Apple), Adobe Echosign, Fitbit, Sendgrid, Mozilla Foundation, Zendesk, SendGrid.

2ndQuadrant - PostgreSQL Consultant

Buenos Aires, Argentina
February 2014 - January 2015

PostgreSQL consultant, support and training.
Testing new features, debugging and code review.

BlackBird IT (ex-PalominoDB) - Database Operations - Professional Services

Las Vegas, NV
September 2011 - February 2014

Primary DBA/Teach Lead of the PostgresXC databases.
MySQL-and-forks/PostgreSQL-and-Forks administration over several customers.
Considerable amount of experience running DDL/Query/Capacity/Server Reviews.
Technical writer (site is under “pythian.com”): http://www.palominodb.com/category/postgres
Backups, Replication, HA, Monitoring, Trending, Health Reviews, DDL Reviews, percona toolkits and several Postgres tools.
Some other databases that I’m currently working with: MongoDB, Cassandra, Redis.
AWS experience. EC2, RDS, S3, LB, EBS, Redshift, DynamoDB, AWS API.
Open Stack Cloud experience.
Extensive experience on server reviews, workload tracing and SQL rewriting and tuning.
Scripting/development: Python, Perl , PL/pgsql and bash. In reverse order.

Some of the highlighted customers: Adobe Echosign, Fitbit, Zendesk, Chegg, SendGrid

Aedgency - MySQL/Oracle Database Administrator

Barcelona, Spain
November 2010 - March 2012

MySQL/Oracle database administration.
Query tuning and performance.
ETL integration between databases.
PL/SQL development.
Bash scripting.
Sphinx basic configuration, fixing and monitoring.

SIU - DBA & Database Production Consulting

Buenos Aires, Argentina
July 2009 - July 2010

Provided traning and support to national universities (as UNLP, UNC, UNNE, UNNOBA, UNCU, UNPA, UNR, etc), support developers in DB modeling and administration of Postgresql-Informix-Mysql databases.
Data Architect tasks and server revisions. Planning migrations and future strategies to board new releases.
Coordinated teams for database support to enhance the compliant between apps of SIU.
Developing the production and pre-prod following plan for all the SIU apps. Server metrics and other stuff for high performance servers.

Globant - Unix/Linux Systems Administrator - EA

Buenos Aires, Argentina
February 2009 - July 2009

SysAdmin Unix at EA (Electronic Arts) Hydra - GOP project.
Maintained platform consisted in Oracle database 10, Apaches and Tomcats (VAP, VCM) Clustered, with several stages of deploy.
Main tasks were relate to deploys, environment configuration, VMWare Infraestructure Client maintenance and monitoring.
I did Mysql DBA tasks on Prod, Pre-Production and Development Servers for a Forums project. Fixing some character set problems and DDL, backups, restores, check, performance and others.
Basic knowledge on deployment / process with Maven - Ant - Hudson.
Assigned 50% to another project to provide Engineering Support at EA over Python scripting.

Correo Argentino

The following roles were at Correo Argentino, under different administrative units.

Senior Systems Administrator

Monte Grande, Argentina
August 2008 - February 2009

Managed production platform at Correo Argentino (over 400 terms with local Postgres databases and Linux enviroment).
Some machines was enlaced with a Active Directory throw WinBind.
Created an improved deploy tool for scripts, database recovery, control and monitoring, etc.
Also managed servers over Centos 5 for the support area’s knowledge-base application (7 DB MySQL 5.1)

Siemens - PHP developer

Monte Grande, Argentina
January - August 2008

Admitel Platform developer. Consists in PHP + (Javascript, Ajax, x/Html, xml) - Oracle 8i. Some of the ’extra’ task was made some Perl scripts for support area.

Huenei - Application Support

Monte Grande , Argentina
October 2007 - January 2008

Terminal administration in W/NT and 2K remote servers. Configuration, control, monitoring. Attend Remedy tickets for fix problems and others.
The application was in Paradox and Oracle databases, in which my tasks consisted in repair tables, fix some wrong data and others.
Bug reporting and detection.
MOSAIC debugging and support.
Customer Correo Argentino / Siemens.

Pre-IT work

Before transitioning to a career in IT, between 1998 and 2006, I served in the Argentina’s Federal Bureau of Prisons (Servicio Penitenciario Federal) as an officer, managing operational groups at institutions ranging from medium to high security.

Positions at SPF

Maximum Security Complex (CPF 1)

Complejo Penitenciario Federal 1 (CPF1)
2005-2006
Module 6 - Sanctioned Section

Worked as Internal Shift Manager.
Conducted sanction procedures and crime investigations.

Unit 31 (Woman’s Facility)

Complejo Penitenciario de Mujeres
2004 - 2005

Worked as External Shift, Weapon capacity and Storage management.
Conducted sanction procedures and crime investigations inside the premises.
Cooperated in the design of some of the security and emergency procedures.
Member of the Security Counsil.

Young-Adult Complex (Unit 24,26 and Drog-Addiction Rehab Facility)

Complejo Penitenciario de Jóvenes Adultos de Marcos Paz (CPFA)
2003 - 2004

Internal Shift Manager.

NCO School

Escuela de Suboficiales Cnel. Rómulo Páez
2002 - 2003

Instructor

Young-Adult Complex (Unit 24,26 and Drog-Addiction Rehab Facility)

Complejo Penitenciario de Jóvenes Adultos de Marcos Paz (CPFA)
January 2000 - 2002

External Shift, Weapon capacity and Storage Manager.
Cooperated in the design of some of the security and emergency procedures.