Our Vision & ProductsEverAI — Building the Future of AI CompanionshipOne of the Top 15 Largest & Fastest-Growing AI Companies in the World50 Million Users in 2 years — Help Us Reach 100M first, 500M nextAt 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 startedOur TeamWe 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 LeadershipCo-Founder Mad Paws Holdings (from 0 to IPO)Forbes 30 under 30 + Deloitte TechFast50 ’22 & ’23Michael Monin [Co-founder & CTO]10+ years as CTO / COO (web2/web3), 3 years in AI/LLMSerial-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 GrowthSerial-entrepreneur: Curatible (sold to Blackstone) and MTK Digital (exited / 0-> $20m revenue)Maruša Fasano [CFO/Legal]25+ years in Finance, Strategy, M&AEx-CFO;/M&A; @Curatible (exited to Blackstone)Ex-President of the Board @SotremoSA (exited)Co-founder/CFO @SoftOne (exited)Your RoleMost 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 GRPODiagnose model failures and turn them into experiments. Decide whether the answer is better data, post-training, prompting or classifiersBuild training data and evals that directly shape what gets trained nextImprove model behavior across personalization, consistency, tone, multilingual and group interactionsShip to production and use real user behavior to guide the next iterationSpeed up the training loop so experiments are faster, easier to compare, and more reproducibleYour QualificationsYou’ve personally post-trained open-weight LLMs for a user-facing product and shipped them to productionYou’ve worked where AI was core to the product or business, not an experimental side featureFine-tuning is core to your experienceStrong Python, PyTorch and Hugging Face,



with hands-on GPU training and debuggingYou build data and evals yourself and make decisions from evidenceYou can take work beyond notebooks into productionYou use AI tools daily in your own engineering workYou are fully comfortable working with uncensored models and explicit NSFW content, including harmful material when developing and evaluating moderation systemBonus pointsExperience with conversational AI, roleplay products, or highly personalized consumer AIMultilingual LLMsModeration, safety, or adversarial testingMultimodal modelsOpen-source LLM / post-training contributionsWhy EverAI?Exponential Growth : From 50M users in 2 years, to 100M next — and 500M beyondTrack Record of Category-Creating Innovation : We consistently launch world-first AI applications — setting the pace, not following itGlobal Impact : Top-tier user growth, real-world adoption, and cultural relevanceProven Leadership : A senior team that’s launched, scaled, and exited & IPO’d multiple scale ups — now fully focused on reshaping AI companionshipElite Remote Team : 100% remote and built to win — world-class talent from Tier 1 tech companies, with a culture of ownership, velocity, and radical creativityEthical Core : Our AI ecosystem is governed by EverGuard, our proprietary AI moderation technology, ensuring responsible development at scaleWhat

We Offer
Contract Type: We prefer B2B, but we’re versátil, what matters is long-term commitment and impactWork From Anywhere: Fully remote. Choose the environment where you do your best workPaid Time Off: 4 weeks (20 working days) of PTO per year to recharge and resetAnnual Gathering: A yearly in-person meetup to connect, brainstorm, and celebrate wins togetherHealth & Wellness Support: Monthly allowance of100 USD for he

📌 Mid/Senior Ai Llm Engineer (Málaga)
🏢 EverAI
📍 Málaga