Back-End Engineer

Barcelona, Spain·Full-time·Added over a year ago

Alinia AI

5 open roles

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What they offer

Full-time hours
Per the ad.
Hybrid
Office and home days — the ad has the split.

What they ask for

Have the right to work in Spain
Alinia AI doesn't mention sponsorship in the ad.
Work in English
English is required, per the ad.
Be near Barcelona for hybrid days
No relocation package mentioned.

This job was published a year ago

The role

About the Role

As Alinia's Back-End Engineer, you will play a foundational role in shaping the core infrastructure and backend systems powering our platform. We're building critical safety and governance infrastructure for generative AI, and as one of the first engineers, you'll be instrumental in ensuring that our backend is fast, scalable, secure, and enterprise-ready. This is a hands-on, high-impact role for someone who thrives in a fast-paced startup, can wear multiple hats, and wants to help define how the backend of AI-powered products should be built.

Responsibilities

Maintain, scale, and secure our Python FastAPI backend and microservices
Serve and optimize large language models (LLMs) via performant, cost-aware inference endpoints
Design and build robust, scalable APIs to support product and customer use cases
Set up and manage CI/CD pipelines, observability, and monitoring to ensure system reliability
Manage cloud infrastructure and optimize spend, balancing performance and cost
Implement security best practices and support compliance with frameworks like SOC 2 and ISO 27001
Work closely with product and front-end engineers, translating user and product needs into scalable backend architecture
Collaborate with technical vendors, AI providers, and cloud platforms on integrations and deployments
Triage and resolve backend bugs or incidents, especially those affecting customer experience
Support post-sales technical implementation and onboarding for enterprise customers

Requirements

3+ years as a backend engineer working on production systems
Strong proficiency in Python and experience building with FastAPI or similar frameworks
Deep experience with RESTful APIs, PostgreSQL, and Docker
Solid understanding of backend infrastructure, including deployment, CI/CD, observability, and debugging
Experience working with or integrating LLM inference pipelines
Familiarity with cloud platforms (e.g. AWS, GCP, or Azure)
Strong understanding of security, data privacy, and compliance in an enterprise SaaS context
Clear communicator and cross-functional collaborator
Comfortable working in a startup environment with shifting priorities and open threads

Nice to have

Experience building and scaling systems to support LLM-serving infrastructure
Exposure to infrastructure-as-code (e.g. Terraform, Pulumi) and Kubernetes
Prior experience with SOC 2, ISO 27001, or similar audits
0→1 startup experience and ability to navigate ambiguity with ownership
DevOps mindset: build, monitor, fix, and improve continuously

Why Join Alinia?

Cutting-edge tech: Work on one of the most important challenges in AI-alignment, safety, and trust
High ownership & growth: Be a core part of the early engineering team with massive upside
Flexible work: Hybrid or remote work, with preference for CET time zone
Collaborative culture: Small, experienced, mission-driven team
Impact: Directly shape the technical foundation of an AI governance platform adopted by enterprises

About Alinia AI

Alinia AI is an AI software company that provides a platform for making AI systems compliant by design, offering products for evaluation, guardrails, and monitoring. The company focuses on regulation-informed control layers to help enterprises deploy AI assistants at scale, with particular emphasis on financial services, as evidenced by testimonials from Banco Santander and Origin Financial. Their research includes a RAG Guard model for detecting hallucinations and irrelevance, benchmarked against industry leaders like GPT-4o-mini, IBM Granite, and AWS Bedrock.

Alinia AI has a presence in Barcelona, Spain, where it is hiring for roles such as Applied AI Research Intern, Applied Research Scientist, Back-End Engineer, and Machine Learning Engineer. The company's work culture emphasizes regulatory compliance and AI safety, making it relevant for international professionals interested in AI governance, compliance, and applied research. However, specific details about their Spain office size, work culture, or relocation support are not provided in the available evidence.

Industry: AI Software
In Spain: Barcelona
Website: alinia.ai

Good to know if you are moving

Alinia AI has job openings in Barcelona, Spain, including roles for Applied AI Research Intern, Applied Research Scientist, Back-End Engineer, and Machine Learning Engineer.
The company focuses on AI compliance and regulation, with products for evaluation, guardrails, and monitoring, which may appeal to professionals interested in AI governance and safety.
Alinia AI's research includes a multilingual RAG Guard model for detecting hallucinations, tested across six languages and benchmarked against industry leaders like GPT-4o-mini, IBM Granite, and AWS Bedrock.
The company counts major financial institutions like Banco Santander and Origin Financial among its clients, indicating a strong focus on the finance sector.
Alinia AI offers a careers page on their official website, suggesting they actively recruit for technical and research positions.

All open roles at Alinia AI