Skill needed: SQL, Python, LLMs, GCP, AB Testing.
Employer: Leadtech
We are looking for a highly skilled LLM Dev Analyst to design, build, and scale intelligent agents within our Databricks ecosystem, redefining how data is accessed, interpreted, and activated across the organization.In this role, you will operate at the intersection of AI engineering, analytics, and data platforms, developing domain-specific agents that automate and augment decision-making across key business areas including A/B testing, marketing performance, data engineering workflows, and MarTech processes.You will translate complex business challenges into agent-driven solutions powered by Large Language Models (LLMs), leveraging both structured and unstructured data to deliver real-time insights and automation at scale.As a core contributor to our next-generation data stack, you will define and implement best practices for agent architecture, prompt engineering, evaluation frameworks, and orchestration within Databricks, ensuring production-grade reliability and business impact.Key Responsibilities1. Agent Design & DevelopmentDesign, build, and deploy LLM-powered agents for multiple business domains (A/B testing, marketing analytics, data engineering automation, MarTech workflows)Develop multi-step reasoning agents that integrate with internal data systems, APIs, and toolsImplement RAG architectures to enable agents to leverage enterprise data effectively2. Databricks & Data IntegrationIntegrate LLM agents within the Databricks lakehouse architectureBuild scalable pipelines using PySpark, SQL, and Databricks workflowsEnable seamless interaction between agents and data warehouses, event streams, and APIs3. Prompt Engineering & EvaluationDesign and optimize prompts, tools, and agent workflows for accuracy and performanceDevelop evaluation frameworks to measure agent quality, reliability, and business impactImplement strategies to reduce hallucinations and improve response consistency4. Automation & Use Case DeliveryBuild agents that automate:Experimentation analysis (A/B testing insights)Marketing performance reporting and optimizationData Engineering workflows and monitoringMarTech processes and campaign operationsDeliver solutions that drive measurable efficiency gains and decision velocity5. Productionization & ReliabilityProductionize agent systems with monitoring, logging, and observabilityImplement guardrails, security controls, and governance frameworksEnsure scalability, latency optimization, and cost efficiency6. Cross-Functional CollaborationPartner with Data Engineering, Analytics, Marketing, and Product teamsTranslate business requirements into scalable AI solutionsCommunicate insights and capabilities to both technical and non-technical stakeholdersRequirementsMust-Have QualificationsProven experience building applications with Large Language Models (LLMs)Strong expertise in prompt engineering, RAG architectures, and agent frameworks (e.g., LangChain, LlamaIndex)Experience with Databricks/Snowflake/GCP, including PySpark and SQLStrong proficiency in PythonSolid understanding of analytics use cases such as A/B testing, marketing performance, or data workflowsExperience implementing LLM evaluation, monitoring, and guardrailsStrong problem-solving skills with the ability to translate business needs into technical solutionsNice-to-Have QualificationsExperience with vector databases (e.g., Pinecone, FAISS, Weaviate)Familiarity with open-source LLM deployment and optimization (Hugging Face, vLLM, etc.)Knowledge of MLOps practices, CI/CD, and scalable infrastructure (Docker, Kubernetes)Experience with MarTech tools (GA4, AppsFlyer, Segment, Braze, Amplitude)Strong background in experimentation frameworks, causal inference, or incrementalityExperience designing multi-agent systems or autonomous workflowsUnderstanding of AI product design and human-in-the-loop systemsWhat We’re Looking ForA builder mindset with a passion for applied AI and automationAbility to operate in ambiguous, fast-paced environmentsStrong ownership and accountability for end-to-end deliveryCuriosity to explore and implement cutting-edge AI capabilitiesA pragmatic approach to balancing innovation with reliabilityBenefitsWhy should you join us?Growth and career developmentAt Leadtech, we prioritize your growth. Enjoy a flexible career path with personalized internal training and an annual budget for external learning opportunities.Work-Life balanceBenefit from a flexible start and end times and the option of working full remote or from our Barcelona office. Enjoy free Friday afternoons with a 7-hour workday, plus a 35-hour workweek in July and August so you can savor summer!Comprehensive benefitsCompetitive salary, full-time permanent contract, and top-tier private health insurance (including dental and psychological services).25 days of vacation plus your birthday off, with flexible vacation options—no blackout days!Unique PerksIf you wish to come, in our office in Barcelona you’ll find it coplete with free coffee, fresh fruit, snacks, a game room, and a rooftop terrace with stunning Mediterranean views.Additional benefits include ticket restaurant and nursery vouchers, paid directly from your gross salary.Join us in an environment where you’re free to innovate, learn, and grow alongside passionate professionals. At Leadtech, you’ll tackle exciting challenges and be part of a vibrant team dedicated to delivering exceptional user experiencesEqual Employment Opportunity Employer:Leadtech is an Equal Employment Opportunity (EEO) Employer, which means we encourage applications from people with different backgrounds, interests, and personal circumstances. Our team welcomes applicants regardless of their race, gender, age, religion, nationality, sexual orientation, and/or disabilities. All we need is your high energy, skills, and willingness to be a part of a great project!LocationYou'll have the flexibility to choose whether you'd like to come to the office every day, from time to time, or work fully remote. We want you to find the best combination for you.If you prefer to be surrounded with amazing people, our exceptional office is in Barcelona’s Blue Building, located right on the city's seafront. Besides our stunning views, you’ll enjoy our office perks such as free fruit, snacks, and coffee and you’ll also be able to take part in our Mario Kart and table tennis competitions.The personal data you provide will be processed in order to manage your candidacy for the corporate selection processes that fit your profile. If you wish, you can exercise your rights of access, rectification or cancellation by writing to our address (Avenida Litoral, 12-14, 5ta planta. Barcelona. 08005) or to the email address protecciondedatos@LeadTech.com, attaching to your request a document that can validate your identity.