Agentic Ai Engineer (M/F/D)

Sixt; Viseu; Hybrid; EUR 90,000 - 120,000; Full time

Benefits offered by this job

Flexible work setup

28 vacation days per year

Birthday day off

Private health insurance for you and a

Coverflex allowance

Daily meal allowance

Exclusive SIXT rates

Job summary

SIXT is building a Data Science team in Portugal, shaping Customer Service Transformation with an AI assistant that authenticates customers, manages reservations, and answers policies across 10+ markets and 7 languages.

You will own agent logic end to end, translating business problems into capabilities, and delivering real transactions with robust guardrails, authentication, and integration to Salesforce and Genesys.

Qualifications

• Hands-on software engineering with production ownership.
• Experience building tool-calling agents.
• Experience with LLMs and prompt engineering discipline.

Responsibilities

• Own agents end to end: prompt, orchestration graph, tools, evals, deployment, dashboard.
• Translate business problems into agent capabilities with stakeholders.
• Ensure cost and latency balance; implement multi-provider model routing and prompts caching.
• Collaborate across stack with software engineers, data scientists, MLOps and platform teams.

Skills

Python programming

AWS cloud experience

Lang Graph

Lang Chain

LLMOps

English fluency

Tools

Lang Graph

Lang Chain

Open API

AWS Bedrock

Job description

Join our Data Science team and help shape SIXT's Customer Service Transformation. Our AI assistant CARA authenticates customers, manages real reservations, and handles policy questions across 10+ markets and 7 languages. She's a production multi-agent system with write access to SIXT's booking platform, running on chat, app, Whats App, and soon voice. Your work will impact millions of customers and deliver measurable business results. YOUR ROLE AT SIXT You own agents end to end: prompt, orchestration graph, tools, evals, deployment, dashboard.

YOUR ROLE AT SIXT

You write the agent logic and watch your own traces in production You translate business problems into agent capabilities, working with product, business and customer service stakeholders to define tool calls and sub-agents, and you build for real transactions with step-up authentication, guardrails, idempotent case handling, and handover into Salesforce and Genesys You make quality measurable, extending our evaluation harness with LLM-as-judge rubrics, tool-trajectory assertions and prompt A/B suites that gate every release You engineer for cost and latency as much as accuracy: multi-provider model routing with fallbacks, prompt caching, small models where small models win You collaborate across the stack with software engineers, data scientists, MLOps and platform teams, balancing bespoke agent logic against reusable platform capability, and you raise the floor around you by sharing agentic and LLM engineering knowledge with colleagues and helping other teams integrate Agentic AI into their products You work with the following stack context: Python with Lang Graph and Lang Chain, deployed as containerised agents on AWS Bedrock Agent Core with MCP sub-agents and Open API tool federation.

YOUR SKILLS MATTER

Engineering foundation You're an engineer first with strong, hands‑on software engineering, real production ownership, excellent Python skills, and solid AWS cloud experience Agentic experience You have built tool‑calling agents with Lang Graph/Lang Chain or equivalent frameworks and shipped them to actual users rather than keeping them in notebooks Model and prompt expertise You're hands‑on with frontier and open models like Anthropic Claude, Open AI, AWS Bedrock, and open-source models such as Llama, with a clear point of view on when to use which, and you treat prompt engineering as an engineering discipline: versioned, reviewed, evaluated, A/B tested LLMOps paradigm You know and have applied LLMOps: tracing, evals, guardrails, token and latency budgets, continuous integration and deployment Bonus skills MCP, real‑time voice AI (Web RTC, SIP, streaming STT/TTS), event‑streaming pipelines, Type Script/React, or contact‑centre platforms like Genesys and Salesforce add value Motivation and communication You're extremely motivated, passionate about learning, bring a genuine can‑do attitude, communicate fluently in English, and appreciate cultural diversity.

WHAT WE OFFER

A Global Tech Hub in Lisbon Join a thriving international tech community and work alongside engineers, product experts, and business teams who turn ideas into real impact. Our hubs at Factory Lisboa in Beato and ARTs Lisboa in Parque das Nações are where great tech gets built Learning & Knowledge Exchange Level up through regular events with internal and external speakers.

We value curiosity, continuous learning, and open exchange – across teams, disciplines, and borders Flexible Work Setup Two office days a week, flexible hours, and modern spaces built for both deep focus and team collaboration – work the way that brings out your best Time Off & Wellbeing Enjoy 28 vacation days per year, an additional day off on your birthday, one volunteer day annually, and private health insurance that also covers your spouse and children free of charge Practical Everyday Benefits Get a yearly Coverflex allowance and a daily meal allowance to make everyday life a little easier SIXT Perks Get exclusive rates on all SIXT services, with special discounts extended to your family and friends.

Because great perks are even better when you can share About us: We are a globally leading mobility service provider with a revenue of €4.00 billion and around 9,000 employees worldwide. Our mobility platform ONE combines our products SIXT rent (car rental), SIXT share (car sharing), SIXT ride (taxi, ride, and chauffeur services), and SIXT+ (car subscription), giving our customers access to our fleet of 350,000 vehicles, the services of 4,000 cooperation partners, and around 5 million drivers worldwide.

Together with our franchise partners, we are present in more than 110 countries at 2,000 rental stations. At SIXT, top-tier customer experience and outstanding customer service are our highest priorities. We believe in true entrepreneurship and long‑term stability and align our corporate strategy with foresight.

Agentic Ai Engineer (M/F/D) • Portalegre, Portuguese Republic, PT