jv_João VarandasSOFTWARE ENGINEER

LISBON, PORTUGAL / OPEN TO IDEAS

João VarandasHi, I’m João.Software Engineer at Mastercard Dynamic Yield

Engineering systems.
Connecting ideas.

I build reliable cloud-native software, connect technical decisions with business needs, and stay curious about what comes next.

● ● ●the_developer_studio⌘
Pixel-art developer studio with glowing monitors, autumn trees and a fox companionAFTER HOURS / ALWAYS CURIOUS
Building with intention↳ autumn edition
CLOUD-NATIVE SYSTEMSSOFTWARE ARCHITECTURESECURITY & RELIABILITY

01 / THE PERSON

Technical depth.
A wider perspective.

I’m a software engineer in Lisbon, drawn to the bigger picture: how systems fit together, how teams collaborate, and how technical decisions create real value. My interests span software architecture, security, and distributed systems.

From Java backends and streaming data to cloud-native microservices, I like making complex systems more reliable, scalable, and secure. And I enjoy bringing people and ideas together along the way.

Meet me on LinkedIn ↗

02 / THE JOURNEY

Experience that connects.

View full profile ↗
2022 — NOW

Mastercard Dynamic Yield

Software Engineer · Jul 2022 – present

Cloud-native email personalisation across four Node.js microservices. Kubernetes, AWS, Terraform, observability, security and cloud cost optimisation.

2021 — 2022

Zego

Software Engineer · Jul 2021 – Jun 2022

Data-intensive backend systems in C# and SQL Server, with real-time Kafka pipelines using Scala, Akka Streams and DynamoDB.

2020 — 2021

Fidelidade

Solution Architect · Jul 2020 – Jun 2021

Connected technology and business needs through solution design, systems integration and cross-team digital transformation.

2018 — 2020

Premium Minds

Software Engineer · Jun 2018 – Jun 2020

Java and PostgreSQL backend services for Telpark, a distributed parking platform spanning more than 150 facilities in Portugal and Spain.

2017 — 2018

INESC-ID

Researcher Assistant · Sep 2017 – Nov 2018

Research experience at INESC-ID.

2018

Atos

Software Engineer · Internship · Mar–Apr 2018

Software engineering internship in the Lisbon area.

Node.jsJavaAWSKubernetesTerraformKafkaScalaC#PostgreSQLGrafana

ROOTS & CONTINUED LEARNING

Instituto Superior Técnico

Master’s in Computer Engineering · 2016–2018
Bachelor’s in Information Systems and Computer Engineering · 2013–2016

ISCSP · Universidade de Lisboa

Postgraduate Degree in Military Strategic Intelligence · 2025

Microsoft Azure Fundamentals

Microsoft certification · February 2021

03 / THE NOTEBOOK

The engineering notebook.

Notes on architecture, security & craft

A fresh page.

The notebook is open. Articles will appear here as they’re published.

Ideas → experiments → insights.

HAVE AN IDEA IN MIND?

Good systems start
with a conversation.

Start a conversation ↗