Daniel (Maqueda) M.

Founding Database Engineer

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Berlin, Germany

Experience

Oct 2025 - Present
3 months

Founding Database Engineer

tonbo.io

  • Working on the next iteration of tonbo to make it the most flexible in-process analytical database in the market that scales and is operated with strong availability

  • Introduced object scope cache to the remote storage layer to avoid IO churn

  • Working on refactoring WAL to support remote storage operations taking care of the health of the systems as well as designing the operational story and bringing them to production

May 2025 - Sep 2025
5 months
Berlin, Germany

Tech Lead

super.ai

  • Led a team of 6 to deliver the new flows storage and messaging product
  • Designed authentication and all backend flows with an emphasis on serverless systems
  • Built the websocket to power the table view for real-time updates, leading to signing two new customers
  • Responsibilities: design, documentation, refinement, delivery
  • Technologies: AWS/GCP, Python (backend), Supabase
Nov 2023 - Apr 2025
1 year 6 months
Berlin, Germany

Tech Lead

Trade Republic

  • Drove the execution of multi-accounts and local branches for the Customer Platform team
  • Delivered local branch migration migrating 800k customers from non-German jurisdictions (first France)
  • Led 6 other teams plus my team of 15 cross-functional engineers (mobile, web, backend)
  • Responsibilities: design, documentation, refinement, delivery
  • Technologies: AWS, Java and Kotlin (backend), Kubernetes, Kafka, RabbitMQ
Jan 2023 - Nov 2023
11 months
Berlin, Germany

Software Development Engineer

AWS

  • Designed and delivered a service to enable instance attestation in the scope of hardware encryption in EC2 Enclaves using AMD SEV-SNP technology
  • Worked in a team of three, mentoring two engineers
  • Maintained the Rust client
  • Responsibilities: design, documentation, refinement, delivery
  • Technologies: AWS (Lambda, SQS, S3, DDB), Java (backend), Rust
Jan 2022 - Dec 2022
1 year
Berlin, Germany

Rust Database Engineer

Sap

  • Developed SIGNAL, a custom process mining query engine with an SQL-like query language, in Rust
  • Worked on scalability improvements and new operators (joins)
  • Technologies used: Rust, Apache Arrow, Apache Parquet, AWS services
Mar 2017 - Dec 2021
4 years 10 months
Berlin, Germany

Software Development Engineer

AWS

  • Metering: developed microservices to meter the usage of service teams in AWS Billing

  • Pricing: maintained four Pricing Systems with a focus on deprecating the old relational database

  • Discounts: designed, developed and delivered a service to automate discounts (starting with EDPs)

  • Collaborated with Product, Management and Customers to define the product from the beginning

  • Mentored junior developers in a team of 8–10

  • Responsibilities: design, documentation, refinement, delivery

  • Technologies: AWS (Lambda, SQS, S3, DDB), Java, Kotlin, Scala

Sep 2016 - Feb 2017
6 months
Berlin, Germany

Software Developer

Sap-Datango

  • Developed a one-page cross-browser web application in JavaScript, HTML and CSS with JSON as the data exchange format
  • Built a cross-browser rich text editor in JavaScript
  • Developed and maintained MVC and component JavaScript framework to handle cross-browser issues
  • Technologies: JavaScript, CSS, HTML
Feb 2015 - Aug 2016
1 year 7 months
Berlin, Germany

Full-Stack Developer

HERE Maps

  • Full-stack JavaScript developer in the Connected Driving space
  • Collected, transformed and presented internal sources to drive decisions based on data
  • Technologies: Node.js, Angular, PostgreSQL
Feb 2012 - Jan 2015
3 years
Berlin, Germany

Software Developer

Sap-Datango

  • Developed a one-page cross-browser web application in JavaScript, HTML and CSS with JSON as the data exchange format
  • Built a cross-browser rich text editor in JavaScript
  • Developed and maintained MVC and component JavaScript framework to handle cross-browser issues
  • Technologies: JavaScript, CSS, HTML
Jan 2004 - Present
22 years
Madrid, Spain

Various

Various

  • 3 years as an R&D Engineer managing R&D projects for Indra and Telefónica
  • 1 year as a Full-stack developer with Java on the backend
  • 1 year as a Test Engineer at Telefónica
  • Technologies: Java, Android, JavaScript, CSS, HTML

Summary

I am a Software Development Engineer with close to 20 years of experience, the most significant as a backend developer working with distributed systems at scale and database internals. Distributed Systems with multiple components working together at scale.

Languages

Spanish
Native
German
Advanced
English
Advanced

Education

Sep 2004 - Sep 2007

UNED

Philosophy · Madrid, Spain

Sep 1998 - Sep 2004

Universidad Complutense

Diploma in Software Engineering, focus on Artificial Intelligence · Software Engineering · Madrid, Spain

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