About

Photo of Cristiano Vagos

I grew up in Nazaré, in a family of fishermen — that's where I learned resilience, hard work, and to chase ambitious goals, and it still shapes the way I approach engineering today. I started with a technical IT course at Externato Dom Fuas, moved on to Computer Engineering in Aveiro, and since then I've worked at startups where I was the first employee and at global scale-ups where I led teams. My strength is backend: distributed systems, integrations, cloud migrations. Today I'm a Software Engineer (Senior Software Engineer at Pliant) and, in my free time, I build websites and custom software for businesses in my home region.

Download PDF
Oct 2025 – present

Senior Software Engineer

Part of the authentication, authorization, workflows and policies team — critical components of the platform, at a fintech that recently passed 100M ARR. One of the team's senior engineers, as an individual contributor.

  • Java (Spring Boot)
  • PostgreSQL
  • Kafka
  • AWS
Pliant
Mar 2024 – Oct 2025

Staff Software Engineer↑ internal promotion

Led the Integrations team (6 engineers) building the APIs and systems connecting wellness partners to millions of users. Main point of contact for technical stakeholders; drove architecture, system design and technical strategy while contributing hands-on to key backend services.

  • Kotlin (Spring Boot/Quarkus)
  • Scala (Akka)
  • Go
  • TypeScript
  • PostgreSQL
  • Kafka
  • RabbitMQ
  • Kubernetes
  • AWS
Wellhub (ex-Gympass)
Nov 2021 – Mar 2024

Senior Software Engineer

Started on the Check-in & Booking team owning the product's critical paths; later founded and led the Integrations team. Built an internal integration platform replacing a 3rd-party iPaaS: +15% booking acceptance rate, piloted with 4k partners serving over a third of all reservations — now scaled to 15k+ partners and millions of bookings/check-ins.

  • Kotlin (Spring Boot/Quarkus)
  • Scala (Akka)
  • Go
  • TypeScript
  • PostgreSQL
  • Kafka
  • RabbitMQ
  • Kubernetes
  • AWS
Wellhub (ex-Gympass)
Sept 2020 – Oct 2021

Head of Engineering↑ internal promotion

Led backend and cloud infrastructure at a real-time logistics startup. Designed the fleet-management algorithms (goal: luggage pickup under 15 minutes), maintained critical microservices, and led planning, QA and team mentoring.

  • Go
  • TypeScript (Koa.js)
  • gRPC
  • AWS
  • Kubernetes
  • NATS
  • Google Firestore
  • Redis
LUGGit
Aug 2019 – Sept 2020

Full Stack Developer

First employee. My master’s thesis was built here and laid the foundation for key product features. Led the GCP→AWS migration and backend re-architecture to Go microservices; mentored trainees and juniors.

  • Go
  • TypeScript (Koa.js)
  • gRPC
  • Google Cloud
  • Kubernetes
  • Apache Kafka
  • Google Firebase
LUGGit
Jun 2018 – Dec 2018

Researcher

Research on cloud mechanisms (OpenStack, Proxmox VE), virtualized resource management, Linux server administration and Docker containerization.

  • Linux
  • Docker
  • Proxmox VE
  • Ansible
  • Cisco
Instituto de Telecomunicações (Aveiro)
Jun 2017 – Sept 2017

Software Developer Intern

Summer internship: Android module reading scale weight via RS-232, validated with the client in two weeks; Node.js backend contributions and Java tooling.

  • Angular
  • JavaScript
  • Java
  • Android
  • Google Firebase
  • Node.js
Ubiwhere

Linguagens

  • Kotlin
  • Go
  • TypeScript/JavaScript
  • Java
  • Python
  • Scala

Backend

  • Spring Boot
  • Quarkus
  • Akka
  • Gin
  • Koa.js/Express
  • gRPC

Web (freelance)

  • Next.js
  • Astro
  • React

Dados

  • PostgreSQL
  • MySQL
  • Google Firestore
  • Redis

Infra

  • AWS
  • GCP
  • Kubernetes
  • Kafka
  • RabbitMQ
  • NATS
  • Docker
2011 – 2019

MSc in Computer and Telematics Engineering

MSc in Computer and Telematics Engineering. Thesis on real-time driver positioning correction, graded 19/20 — work that laid the foundation for key LUGGit features.

Universidade de Aveiro

Note: publication abstracts follow the academic standard of English.

2022

Fulfilment of last-mile urban logistics for sustainable and inclusive smart cities: a case study conducted in Portugal

Article · International Journal of Logistics Research and Applications, Vol. 27, No. 6, pp. 931–958 · Cristiano Vagos, et al.

Research on last-mile logistics solutions for sustainable urban delivery in Portuguese smart cities, with practical case study validating algorithmic approaches to fleet management and urban logistics challenges.

View publication
2019

Sistema de correção do posicionamento de condutores em tempo-real (Real-time Driver Positioning Correction System)

Thesis · Universidade de Aveiro — MSc, nota 19/20

Master's thesis on real-time geolocation correction algorithms for delivery drivers, with applications to fleet management and optimized routing. Classified 19/20.

View publication
2018

SpatialGuide — guia turístico áudio com som 3D (Android)

Talk · Encontro da Associação Portuguesa de Engenharia de Áudio (orador convidado) · Cristiano Vagos, Miguel Brás, Nuno Barbosa, Ricardo Pombeiro, Daniel Carvalho

Talk on 3D spatial audio implementation for a mobile tourism guide application on Android, covering audio processing, real-time positioning and immersive user experience design.

View publication
Nov 2019

Add support to go-proto-validators

namely/docker-protoc

View PR
Nov 2019

Add support to envoyproxy gRPC validator

namely/docker-protoc

View PR
Apr 2021

Fix infinite connect/disconnect loops

danitseitlin/redis-modules-sdk-ts

View PR

Download PDF

Got a project in mind?

Let's talk