Ai Engineer

Lexidy
Madrid, Spain
6 days ago

Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Experience required
2 years minimum
Working hours
Regular working hours
Languages
English

Tech stack

Application Programming Interfaces (APIs) Artificial Intelligence Software Applications Cloud Computing Python (Programming Language) Node.Js TypeScript ReactJS Large Language Models Backend Front End Software Development Docker

Job description

AI Engineer Please send your resume in English; applications not submitted in English will not be considered.We are looking for outliers, wired differently from the traditional law firm mindset.Are you a proactive professional who thinks outside the box and is eager to rethink how legal work gets done with AI?Do you want to be part of a forward thinking, disruptive law firm with a startup mindset?Then, continue reading.This is your opportunity.At Lexidy, we work with passion and purpose!We help expats and entrepreneurs do business and make investments in Europe.We serve them by providing 360 degree assistance for the most important milestones in their lives.We are a Legal Tech Boutique that’s wired differently to simplify our customers’ lives.We are sharp, digitally focused and dynamic.Location: Barcelona office, SpainThe TeamYou will be part of our AI team, working both with internal clients (Lexidy’s own legal teams) and on product design to accelerate immigration, corporate, real estate, and tax processes across multiple countries.As a multifaceted team, we respond to a wide range of technical and business challenges.MissionRethink how legal work gets done with AI.Not just using the tools, but figuring out what becomes possible when you build around them, working hand in hand with lawyers and operations teams to turn real legal problems into production ready AI applications.Tasks and ResponsibilitiesDesign and build AI powered applications, from early prototype through productionIntegrate and orchestrate LLMs and agents into real legal workflows (document generation, case triage, knowledge base, etc.)Work directly with lawyers and operations teams to understand the legal problem before proposing a technical solutionContribute to an internal culture of continuous experimentation with AIStay on top of the AI landscape and bring relevant ideas into the teamYou have2+ years of relevant engineering experienceReal world experience building with coding agents (preferably Claude Code) and a proven ability to “manage” them in real projectsExperience with an agentic framework: Mastra (TypeScript), or PydanticAI / smolagents / CrewAI / LangGraph (Python)Solid foundations in transactional architectureModern frontend (ideally React) and backend (Node.js), or an equivalent stack with sound technical judgmentHands on experience with LLMs, embeddings, vector stores, and modern AI frameworks/APIsFamiliarity with cloud platforms (GCP preferred)Product mindset: you prioritize the user experience and the rationale behind decisions, not just the codeA culture of quality: useful tests, clear READMEs, reproducible deployment (docker compose)You are a clear communicator, able to explain technical decisions without jargon to non-technical stakeholders (legal, ops)Proactive and self directed, hands on, independentFluent in English is a plusAnd this would be awesomeExperience with observability and agent tracingDesign of guardrails (confirmations, limits, DISCLAIMERS)Strong problem solving attitude and ability to work in a collaborative environmentWhat’s in it for you?An open minded and collaborative organizational culture of enthusiastic lawyers and technologistsInformal, entrepreneurial and flexible atmosphere in our officesFree coffee, drinks and healthy snacksA Career Development Plan: takes place every six months and is focused solely on youA network of coaches and mentors to boost your leadership skills and personal developmentFlexible working with remote optionsCobee for flexible salaryWellhub with Silver Plan Paid for the company!Corporate Erasmus opportunities within our offices around EuropeAccountability is one of our favourite words.We strive for autonomous and independent ways of workingGrowth opportunities, both locally and globallyWe look after our employees by creating a professional and personal development space.All employees are encouraged to be free thinkers and suggest solutions that could benefit the company.We believe that a warm and friendly work environment helps to promote a general sense of peace of mind, which is essential to our client’s satisfaction.Lastly, at Lexidy, ties are banned, and it is mandatory to have fun!At Lexidy inclusion and diversity are essential.We encourage people from all ethnic groups, genders, sexualities, ages, and abilities to apply.We want to hear from you!#J-*****-Ljbffr

Requirements

2+ years of relevant engineering experience Real world experience building with coding agents (preferably Claude Code) and a proven ability to “manage” them in real projects Experience with an agentic framework: Mastra (TypeScript), or PydanticAI / smolagents / CrewAI / LangGraph (Python) Solid foundations in transactional architecture Modern frontend (ideally React) and backend (Node.js), or an equivalent stack with sound technical judgment Hands on experience with LLMs, embeddings, vector stores, and modern AI frameworks/APIs Familiarity with cloud platforms (GCP preferred) Product mindset: you prioritize the user experience and the rationale behind decisions, not just the code A culture of quality: useful tests, clear READMEs, reproducible deployment (docker compose) You are a clear communicator, able to explain technical decisions without jargon to non-technical stakeholders (legal, ops) Proactive and self directed, hands on, independent Fluent in English is a plus And this would be awesome Experience with observability and agent tracing Design of guardrails (confirmations, limits, DISCLAIMERS) Strong problem solving attitude and ability to work in a collaborative environment

Benefits & conditions

An open minded and collaborative organizational culture of enthusiastic lawyers and technologists Informal, entrepreneurial and flexible atmosphere in our offices Free coffee, drinks and healthy snacks A Career Development Plan: takes place every six months and is focused solely on you A network of coaches and mentors to boost your leadership skills and personal development Flexible working with remote options Cobee for flexible salary Wellhub with Silver Plan Paid for the company! Corporate Erasmus opportunities within our offices around Europe Accountability is one of our favourite words. We strive for autonomous and independent ways of working Growth opportunities, both locally and globally We look after our employees by creating a professional and personal development space. All employees are encouraged to be free thinkers and suggest solutions that could benefit the company. We believe that a warm and friendly work environment helps to promote a general sense of peace of mind, which is essential to our client’s satisfaction. Lastly, at Lexidy, ties are banned, and it is mandatory to have fun! At Lexidy inclusion and diversity are essential. We encourage people from all ethnic groups, genders, sexualities, ages, and abilities to apply. We want to hear from you! #J-*****-Ljbffr

About the company

AI Engineer Please send your resume in English; applications not submitted in English will not be considered. We are looking for outliers, wired differently from the traditional law firm mindset. Are you a proactive professional who thinks outside the box and is eager to rethink how legal work gets done with AI? Do you want to be part of a forward thinking, disruptive law firm with a startup mindset? Then, continue reading. This is your opportunity. At Lexidy, we work with passion and purpose! We help expats and entrepreneurs do business and make investments in Europe. We serve them by providing 360 degree assistance for the most important milestones in their lives. We are a Legal Tech Boutique that’s wired differently to simplify our customers’ lives. We are sharp, digitally focused and dynamic. Location: Barcelona office, Spain The Team You will be part of our AI team, working both with internal clients (Lexidy’s own legal teams) and on product design to accelerate immigration, corporate, real estate, and tax processes across multiple countries. As a multifaceted team, we respond to a wide range of technical and business challenges. Mission Rethink how legal work gets done with AI. Not just using the tools, but figuring out what becomes possible when you build around them, working hand in hand with lawyers and operations teams to turn real legal problems into production ready AI applications. Tasks and Responsibilities Design and build AI powered applications, from early prototype through production Integrate and orchestrate LLMs and agents into real legal workflows (document generation, case triage, knowledge base, etc.) Work directly with lawyers and operations teams to understand the legal problem before proposing a technical solution Contribute to an internal culture of continuous experimentation with AI Stay on top of the AI landscape and bring relevant ideas into the team

Apply for this position

This job is hosted externally. Click below to view the full posting and apply.

Apply on www.buscojobs.com.es

Good distractions

Talks and stories from around this role — technically off-topic, practically not.

1:24 min

Building client-facing AI agents for engineering teams

Alfonso Graziano Alfonso Graziano ¡ Coffee With Developers

2:07 min

Inspecting default bridge architectures and custom Docker networks

Oliver Seitz Oliver Seitz ¡ WWC 2025

45 sec

Working securely with Node.js path application programming interfaces

Sonya Moisset ¡ WWC 2023

1:21 min

Exploring the target application for front end tests

Anna Mcdougall ¡ JS Congress

1:44 min

Balancing artisanal coding skills with automated agent oversight

Jyoti Bansal Jyoti Bansal +1 ¡ WWC Europe 2026

2:34 min

Docker sandbox architecture and microVM environment integration

Manuel de la Peùa Manuel de la Peùa ¡ WWC Europe 2026

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