We are looking for an experienced Senior Python / AI Backend Developer to join our AI development team. You will build and evolve the backend infrastructure powering a suite of specialized AI assistants (e.g., helpdesk support, back-office operations, and HR solutions).
This role requires strong backend engineering skills, hands-on experience with Python frameworks, and genuine interest in AI-driven systems.
Responsibilities:
- Design, develop, and maintain robust, scalable backend services for AI assistants;
- Build and manage secure, efficient RESTful APIs for data integration;
- Ensure performance, reliability, observability, and data security across services;
- Collaborate closely with front-end teams to deliver consistent user experiences;
- Integrate AI-driven capabilities to enable automation and intelligent support;
- Participate in agile practices (sprint planning, code reviews, retrospectives, continuous improvement);
- Communicate technical concepts clearly to business and non-technical stakeholders.
Required Skills & Experience
- 3+ years developing backend web applications in Python;
- Strong experience with FastAPI and REST API development;
- Solid understanding of backend architecture, databases, and server-side logic;
- Experience working in an AI-focused development environment;
- Familiarity with AI integration frameworks such as LangChain and LangGraph;
- Proficiency with Git;
- Growth mindset and willingness to learn new AI technologies;
- Ability to explain technical topics to non-technical audiences;
- English level B1 or higher.
Technical Skills Matrix (Expected Level)
- Python — Advanced
- RESTful APIs — Advanced
- FastAPI — Advanced
- Git — Advanced
- Docker — Intermediate
- Kubernetes — Intermediate
- PostgreSQL — Intermediate
- AI Integration Frameworks (LangChain, LangGraph) — Intermediate
- Agile Development Practices — Intermediate
Nice to Have
- Familiarity with LLMs (Large Language Models)
- Cloud experience, preferably Microsoft Azure
- Basic understanding of machine learning / AI concepts
- Experience with Docker and Kubernetes
- Knowledge of PostgreSQL
- Previous experience in the banking industry (2+ years is a plus)
Key Skills
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- Posted
- Jan 14, 2026
- Type
- Full-time
- Level
- Mid-Senior
- Location
- Lisbon
- Company
- act digital
Industries
Categories
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3 roles aligned with this opportunity
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