Senior Fullstack Developer

Full-Stack Engineer @ Maite.ai

About Us

Maite.ai is on a mission to fight for a fairer world through technology. We're building an AI-powered legal assistant that democratizes access to justice by making legal work faster, more accurate, and more accessible. We're a legaltech startup combining cutting‐edge AI with deep domain expertise to transform how legal professionals work—and ultimately, how people access legal services.

The Opportunity

We're looking for a Full-Stack Engineer who wants to build products that matter. This isn't about adding features to an existing product—it's about shaping the future of AI-powered legal technology from the ground up. You'll work across our entire stack, from crafting intuitive AI copilot experiences to building robust document processing pipelines, all while working directly with our CTO and a lean, high‐impact team.

If you're energized by the intersection of AI and real-world impact, this is your chance to build something meaningful.

What You'll Do

Build end-to-end features across our Next.js frontend and API backend, taking ownership from conception to deployment

Architect AI-powered experiences integrating OpenAI, Anthropic, and Gemini models into seamless user workflows

Design and implement document processing pipelines that handle uploads, analysis, embeddings, and intelligent retrieval

Craft exceptional UIs that make complex AI interactions feel simple and delightful for legal professionals

Manage data architecture in PostgreSQL / Supabase, optimizing for performance and scalability

Write comprehensive tests and documentation because quality and knowledge-sharing are non‐negotiable

Collaborate closely with our small dev team, QA engineers, and CTO to ship fast and iterate based on user feedback

Drive technical decisions with the autonomy and responsibility that comes with being a senior member of a small team

What We're Looking For (Required)

5 years of software development experience with a track record of shipping production applications

Strong full-stack expertise : Modern JavaScript / TypeScript, React, Next.js, Node.js, and API design

Database proficiency : PostgreSQL or similar relational databases, with understanding of data modeling and query optimization

Product mindset : You think about user problems first, not just technical solutions

Testing culture : You write tests, you value quality, you don't ship broken code

Languages : Fluent in Spanish and English (we're a bilingual team and product)

Communication skills : You can explain complex technical decisions clearly and collaborate asynchronously in a remote environment

Nice to Have

Experience with Supabase, Qdrant, or vector databases

Real AI / ML integration experience : You've worked with LLM APIs (OpenAI, Anthropic, Claude, etc.) and understand prompting, context management, and AI UX patterns

Familiarity with document processing (PDF parsing, embeddings, RAG architectures)

Background in startups or fast‐paced environments where you wore multiple hats

Previous work on developer tools, AI products, or SaaS platforms

Understanding of accessibility standards and inclusive design

You Are

User‐obsessed : You start every decision by asking "does this make the user's life better?"

Radically honest : You speak up when something isn't right, challenge ideas constructively, and value truth over ego

Infinitely curious : You dive deep into problems, ask "why?" constantly, and stay rigorous in your exploration

Future‐focused : You move fast, experiment boldly, and believe "done is better than perfect"

Self‐driven : In a small remote team, you don't wait for instructions—you identify problems and solve them proactively

What We Offer

Compensation

€43,000 annual salary

Work Flexibility

100% remote — work from anywhere in Spain

Flexible hours — we care about output, not hours logged

Async‐first culture with regular team meetups to stay connected

Equipment & Setup

Hardware of your choice : MacBook, extra monitor, peripherals — whatever you need to do your best work

Growth & Impact

Direct collaboration with CTO and founding team

High autonomy and ownership over technical decisions

Time to experiment with new AI tools — we encourage exploration and learning

Work on cutting‐edge AI technology with real social impact

Meaningful Mission

Build technology that makes the legal system more accessible

Solve real problems for real people—not vanity metrics

Join a mission to create a more just world through AI

Learning & Development

Exposure to state‐of‐the‐art AI / ML techniques and legal tech domain

Small team = rapid learning across the entire stack

Freedom to explore and integrate emerging AI technologies

Team Culture

Transparent, honest communication (radical truth‐seeking)

No corporate BS—direct feedback, open debates, merit‐based decisions

Supportive, collaborative environment where everyone's voice matters

Regular team meetups to bond and collaborate in person

Work‐Life Balance

28 vacation days

Flexible retribution via Coverflex (meals, transport, kindergarten, and more)

Sustainable pace—we're in this for the long haul

Our Hiring Process

We respect your time and move quickly :

Application Review (within 5 business days) — We'll review your CV and portfolio / GitHub

Initial Call (30 min) — Brief conversation with our CTO to discuss your background, interests, and mutual fit

Technical Interview (90 min) — Collaborative problem‐solving session covering full‐stack development, AI integration, and architectural thinking

Team Fit Conversation (45 min) — Meet team members, discuss working style, culture, and questions you have

Decision & Offer (2‐3 days) — We move fast when we find the right person

Total timeline : 2‐3 weeks from application to decision

Location Requirement

Must be legally authorized to work in Spain. This is a fully remote position within Spain.

Maite.ai is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

Let's build a fairer world together.

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