software engineer — london

Building AI products, and the infrastructure that keeps them fast.

Nearly five years across web platforms, cloud infrastructure, and AI systems — currently shipping RAG and AI-agent workflows on SJR's GX Manager.

question latency — after infrastructure modernisation
  • first-client launch
  • rag & agent workflows
  • image processing with microsoft

who i am

About me

Marcus Dantas profile picture

I am a London-based Software Engineer with nearly five years of experience building web applications, internal tools, cloud-native systems, and AI-enabled product features across startup, consultancy, and research environments.

Since May 2025 I have worked across SJR's GX Manager stack, modernising infrastructure, improving question latency from roughly 25 seconds to 8 seconds, supporting the product's first-client launch, and developing advanced image-processing features in collaboration with Microsoft.

My broader work spans Python, JavaScript, Vue, Go, Kubernetes, Docker, Terraform, AWS, and Azure AD B2C. I am especially interested in reliable software delivery, developer tooling, pragmatic automation, RAG systems, and AI-agent workflows.

View my resume

experience — 2025 onwards

Recent work at SJR

AI product engineering

Building RAG and AI-agent workflows across SJR's GX Manager stack for dynamic conversion experiences.

View case study

Infrastructure modernisation

Modernised platform infrastructure and reduced per-question latency from roughly 25 seconds to 8 seconds.

Product delivery

Supported GX Manager's first-client launch and developed advanced image-processing features in collaboration with Microsoft.

archive — where i started

Earlier projects

Adrastos

Initiated and led the development of a social media platform that is architected around the connection of people through videogames.

Small MVP project where I had the opportunity to heavily contribute to the front end and part of the back end, developed using Ruby on Rails 6.

  • Ruby on Rails 6
  • JavaScript
  • PostgreSQL
  • Heroku
Adrastos

Gamehub

A marketplace for videogames that was rapidly developed by myself and a small team in just a few days.

  • Ruby on Rails
  • JavaScript
  • PostgreSQL
  • Heroku
Gamehub

Mrs Cocktail

A short project that showcases cocktails and allows the user to edit and create their own.

  • Ruby on Rails
  • JavaScript
  • PostgreSQL
  • Heroku
Mrs Cocktail

say hello

Contact

Questions? Get in touch!

If the form is unavailable, email me directly.