Senior Software Engineer (Ruby on Rails) (Full Remote - Europe)

About EverAI

🚀 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

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!

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

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)
• [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)

User-centricity - you are proud of what you build and you share our obsession for amazing user experience

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

Global 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

🎯 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.

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

If that’s you — reach out and apply!

Responsibilities

• Our tech team is expanding rapidly to keep pace with the ambitious feature roadmap we've set out. We are therefore hiring experienced Senior Software Engineers, to help us build and scale our product. You’ll have the opportunity to help define our roadmap and find the best technical solutions to help our customers. You will also have time to run some experiments and bring new ideas to the table.
• Reporting directly to our Tech Lead, you will be responsible for:
• Interacting with the Product Manager to review project specs

Preparing integration plans, break-downs, and estimations

• Hands-on code implementation, PRs, code reviews, testing, etc.
• You'll be working with Michael (co-founder and CTO) along with the product team and the engineering team (web developers, SRE, data scientists).
• setting the pace, not following it

Requirements

• Ruby, Ruby on Rails (latest)
• PostgreSQL, Redis
• Hotwire (Turbo & Stimulus)
• Tailwind CSS
• 💼 5+ years of experience:

As a back-end or full-stack software engineer

• In tech scale-ups or any similarly agile and fast-paced environment
• On large-scale products where your code was used by thousands of monthly users
• 🗣 Strong communication & collaborative skills (perfectly fluent in English)
• 🧢 Ownership and commitment - we’re looking for owners, not renters
• ⚡️ Doer mindset - we are moving fast and we need people who can find the right balance between software craftsmanship and velocity
• 🍭 #NSFW - you are comfortable building products that are based on uncensored models and content

Preferred

• Past experience and/or interest in data science and generative AI (NLP, ML, MLOps, etc.)
• Experience working with globally distributed teams

Benefits

• 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
• Monthly allowance of
• 100 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)
• Work from a co-working space up to twice per month (35 EUR / 40 USD per visit) to stay inspired and connected
• Dedicated funds to support your professional growth: courses, books, conferences, events, or certifications
• Laptop provided + monitor budget up to 250 USD + keyboard/mouse/mic/headphones budget up to 150 USD
• Premium access to ChatGPT, Hugging Face, Claude Code, and any other tool needed to excel at your job, power your ideas and workflows