Job description
MailerLite is one of the fastest-growing email marketing services. We help more than 1 million businesses around the world stay in touch with their customers. Today, we are a team of more than 170 dreamers, adventurers, and world travelers passionate about what we do and what we believe in. And we are ready for another talented person to join the party.

We’re looking for a Machine Learning Engineer to help us build the intelligence layer behind our products - turning the behavioral data of over a million businesses into predictions and actions that help our customers reach the right people, at the right time, on the right channel, without needing a full marketing team. You’ll work across the full ML spectrum: classical predictive models on large-scale behavioral data and applied LLM work, including fine-tuning models on our own data to power a goal-driven assistant.

We’re betting the next phase of MailerLite on ML, and this is one of the first hires to make it real. The data’s already here. The team is still taking shape — and you’ll play a key role in defining it.



We're looking for someone who's excited to help build what's next. ?

Why MailerLite?
- You'll build ML that actually ships to customers
This isn't a research role that produces slide decks. You'll own models end to end — from data and training pipelines to production — and see them drive real business outcomes fast. You'll work on predictive models that surface audience insights and LLM-based assistants that turn those signals into actionable recommendations.
- You'll grow, develop and evolve
As part of a team that’s always looking for new, innovative ways to create value for our customers, you'll constantly be experimenting, learning, and trying out new approaches. You won’t just execute tasks — you'll be encouraged to question assumptions, explore better solutions, and help shape how we use ML across the product over time.
- You'll take ownership
We expect you to take full responsibil

📌 Machine Learning Engineer (Buenos Aires)
🏢 MailerLite
📍 Buenos Aires