Our Vision & Products EverAI — Building the Future of AI Companionship

One of the Top 15 Largest & Fastest-Growing AI Companies in the World

50 Million Users in 2 years — Help Us Reach 100M first, 500M next

At

EverAI , we’re shaping what it means to connect with AI. With

50 million users and counting , we're not just building products — we're creating entirely new categories.

Our flagship product is the

world’s largest AI companionship platform , redefining relationships for millions. It is governed by our proprietary moderation system, EverGuard — an internal AI designed to ensure everything we build is

safe, ethical, and human-first .

And we’re only just getting started!

Our Team We are an enthusiastic, passionate and hardworking team of ≈ 100 people. Our founding team has strong entrepreneurial experience building and scaling web products from 0 to IPO.

Alexis Soulopoulos

[CEO]

10+ years in Tech Executive Leadership

Co-Founder Mad Paws Holdings (from 0 to IPO)

Forbes 30 under 30 + Deloitte TechFast50 ’22 & ’23

Michael Monin

[Co-founder & CTO]

10+ years as CTO / COO (web2/web3), 3 years in AI/LLM

Serial-entrepreneur: MTK Digital (exited / 0->$20m revenue) and Zipchat (AI Chatbot for E-commerce brands)

Thomas Lacroix

[Co-founder & CMO]

8+ years in Customer Acquisition & E-commerce Growth

Serial-entrepreneur: Curatible (sold to Blackstone) and MTK Digital (exited / 0->$20m revenue)

Maruša Fasano

[CFO/Legal]

25+ years in Finance, Strategy, M&A;

Ex-CFO/M&A; @Curatible (exited to Blackstone)

Ex-President of the Board @SotremoSA (exited)

Co-founder/CFO @SoftOne (exited)

Your Role Most LLM roles stop at experimentation.

Here, the models you improve power experiences for 50M+ users.

Most of our traffic runs on

self-hosted, fine-tuned open-weight models . On our internal roleplay evals, our smaller fine-tuned models can outperform much larger off-the-shelf models.

Your job is to make them better.

You’ll join a small AI team led by

Marco, our LLM Tech Lead , working closely with our CTO, Product, Web and DevOps teams. You’ll work across

data, post-training, evals, and model behavior,

taking ideas from failure analysis to production.

The problems are real:

personalization, character consistency,



long conversations, better evals, multilingual behavior, and faster training cycles.

If you want to shape model behavior at consumer scale, this is the role.

Key Responsibilities

Fine-tune open-weight LLMs

using SFT, LoRA/QLoRA and post-training methods such as DPO and GRPO

Diagnose model failures and turn them into experiments.

Decide whether the answer is better data, post-training, prompting or classifiers

Build training data and evals

that directly shape what gets trained next

Improve model behavior

across personalization, consistency, tone, multilingual and group interactions

Ship to production

and use real user behavior to guide the next iteration

Speed up the training loop

so experiments are faster, easier to compare, and more reproducible

Your Qualifications

You’ve

personally post-trained open-weight LLMs

for a user-facing product and shipped them to production

You’ve worked where AI was core to the product or business , not an experimental side feature

Fine-tuning

is core to your experience

Strong

Python, PyTorch and Hugging Face , with hands-on GPU training and debugging

You

build data and evals yourself

and make decisions from evidence

You can take work

beyond notebooks into production

You

use AI tools daily

in your own engineering work

You are fully comfortable working with uncensored models and explicit NSFW content , including harmful material when developing and evaluating moderation system

Bonus points

Experience with conversational AI, roleplay products, or highly personalized consumer AI

Multilingual LLMs

Moderation, safety, or adversarial testing

Multimodal models

Open-source LLM / post-training contributions

Why EverAI? Exponential Growth : From 50M users in 2 years, to 100M next — and 500M beyond

Track Record of Category-Creating Innovation : We consistently launch





world-first AI applications

— setting the pace, not following it

Integral Impact : Top-tier user growth, real-world adoption, and cultural relevance

Proven Leadership : A senior team that’s

launched, scaled, and exited & IPO’d multiple scale ups

— now fully focused on reshaping AI companionship

Elite Remote Team : 100% remote and built to win — world-class talent from

Tier 1 tech companies , with a culture of ownership, velocity, and radical creativity

Ethical Core : Our AI ecosystem is governed by

EverGuard, our proprietary AI moderation technology , ensuring responsible development at scale

What We Offer Contract Type:

We prefer B2B, but we’re flexible, what matters is long-term commitment and impact

Work From Anywhere:

Fully remote. Choose the environment where you do your best work

Paid Time Off:

4 weeks (20 working days) of PTO per year to recharge and reset

Annual Gathering:

A yearly in-person meetup to connect, brainstorm, and celebrate wins together

Health & Wellness Support:

Monthly allowance of100 USD for health insurance expenses & access to unlimited 1:1 sessions with psychologists and lifestyle experts through OpenUp (also available to up to three of your family members)

Co-Working Space Budget:

Work from a co-working space up to twice per month (35 EUR / 40 USD per visit) to stay inspired and connected

Learning Budget:

Dedicated funds to support your professional growth: courses, books, conferences, events, or certifications

Company Laptop & Equipment:

Laptop provided + monitor budget up to 250 USD + keyboard/mouse/mic/headphones budget up to 150 USD

AI Tools Access:

Premium access to ChatGPT, Hugging Face, Claude Code, and any other tool needed to excel at your job, power your ideas and workflows

Top Tier Talent Is Our Multiplier We’re a fully remote group of

A-players from Tier 1 tech , led by an exec team who’ve

launched, scaled, and exited multiple companies . We move fast, and care deeply about what we build — and who we build it with.

We’re looking for

exceptional talent

ready to ship & distribute world-first AI products at scale, fast, and co-create with us this category-defining business.

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📌 Mid/Senior AI LLM Engineer (Full Remote - Europe) (Sevilla)
🏢 EverAI
📍 Sevilla