French AI Solutions Developer

Hexa Group; Lisboa; Hybrid; EUR 90,000 - 130,000; Full time

Benefits offered by this job

Private health insurance

Mental health support

Learning and certification support

Flexible work arrangements

Family support measures

Team moments and community environment

Upskilling opportunities in AI and IT

Job summary

Hexa Group in Lisbon is seeking a Senior AI Solutions Developer for a hybrid role in the banking sector, focusing on designing, testing and industrializing AI-based solutions. You will lead the definition of AI development practices, build reusable capabilities, and collaborate with cross-functional teams to turn opportunities into value.

The role offers opportunities to shape internal developer communities and advance AI governance within a fast-paced environment.

Qualifications

• Senior level experience in software development with hands-on AI solutions.
• Proven track record building, deploying and optimizing AI agents and RAG-based systems.
• Autonomous, ownership-driven mindset in fast-paced environments.
• Ability to balance innovation with practical constraints and quality.
• Collaborative approach to engage technical communities around reusable assets.
• Professional working proficiency in French at C1 level.

Responsibilities

• Research, test and develop AI-powered applications, agents and reusable AI components.
• Define, validate and document MCPs, SKILLs and HOWTO guides to support consistent AI solution delivery.
• Support the establishment of a new software development lifecycle for AI-enabled delivery.
• Design and implement AI agents with advanced orchestration capabilities.
• Maintain and improve RAG systems, vector databases, embeddings and semantic search solutions.
• Optimize token utilization, context management and AI execution patterns to improve cost-efficiency and performance.
• Integrate and orchestrate multiple LLM providers across AI solutions.
• Facilitate an internal AI developer community, encouraging knowledge sharing, SKILL creation and proposals for agents or MCPs.
• Collaborate with cross-functional teams to identify, analyze and deliver AI opportunities aligned with business needs.
• Monitor emerging AI technologies, delivery practices and relevant industry trends.

Skills

AI solutions

AI agents

RAG systems

Vector databases

Embeddings

LLM orchestration

Prompt engineering

Technical documentation

Community enablement

Cross-functional collaboration

Tools

Node.js

Python

Job description

We are looking for a Senior AI Solutions Developer to join a hybrid opportunity in Lisbon within the banking sector. This role focuses on designing, testing and industrializing AI-based solutions, supporting the definition of AI development practices and enabling internal developer communities to build reusable AI capabilities.

WHAT YOU WILL DO

• Research, test and develop AI-powered applications, agents and reusable AI components.
• Define, validate and document MCPs, SKILLs and HOWTO guides to support consistent AI solution delivery.
• Support the establishment of a new software development lifecycle for AI-enabled delivery.
• Design and implement AI agents with advanced orchestration capabilities.
• Maintain and improve RAG systems, vector databases, embeddings and semantic search solutions.
• Optimize token utilization, context management and AI execution patterns to improve cost-efficiency and performance.
• Integrate and orchestrate multiple LLM providers across AI solutions.
• Facilitate an internal AI developer community, encouraging knowledge sharing, SKILL creation and proposals for agents or MCPs.
• Collaborate with cross-functional teams to identify, analyze and deliver AI opportunities aligned with business needs.
• Monitor emerging AI technologies, delivery practices and relevant industry trends.

WHAT WE ARE LOOKING FOR

• More than 9 years of experience in software development, including hands‑on work with AI-based solutions.
• Proven experience creating, deploying and optimizing AI agents and RAG-based systems.
• Strong autonomy, ownership and ability to work in fast‑paced environments with evolving priorities.
• Solution‑oriented mindset, with the ability to balance innovation, quality and practical implementation constraints.
• Collaborative approach and ability to engage technical communities around shared practices and reusable assets.
• Professional working proficiency in French at C1 level.

TECHNICAL SKILLS

• Node.js and/or Python.
• AI agent design, implementation and deployment.
• MCPs, SKILLs and reusable AI capability definition.
• RAG systems.
• Vector databases such as Pinecone, Weaviate or Chroma.
• Embeddings and semantic search.
• Multi‑LLM integration and orchestration.
• Prompt engineering and token optimization.
• Context management and hash‑based context optimization.
• Technical documentation and HOWTO creation.
• Software development lifecycle practices for AI-enabled solutions.

NICE TO HAVE

• Experience facilitating developer communities or internal technical enablement initiatives.
• Exposure to AI governance, information security or cybersecurity best practices.
• Experience supporting standardization or industrialization of AI development practices.

WHAT WE OFFER

• Private health insurance from the first day, with no waiting periods and optional family extension.
• Confidential and free mental health support through TEAM 24, including psychological support, content and live sessions.
• Continuous learning and certification support to strengthen long‑term professional development.
• Flexibility whenever the role and delivery context allow it.
• Childcare vouchers and practical family support measures.
• Team moments, shared milestones and a community-oriented work environment.
• Upskilling opportunities in quality management, information security, AI governance and cybersecurity best practices.

EQUAL OPPORTUNITY

Hexa promotes equal opportunity and inclusive recruitment practices, aligned with the principles of the Portuguese Diversity Charter. We welcome applications from people with different backgrounds, experiences and perspectives.

HEXA LIFE

At Hexa, every professional is a Builder. We work with honesty, mutual support and agility, creating strong professional relationships and contributing to projects, solutions and communities that are built with quality, responsibility and shared purpose.