Backend Engineer (Python) - Tarragona

Mentor Talent Acquisition; Tarragona; Presencial; EUR 90.000 - 120.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Vienna office

Remote with quarterly Vienna visits

Descripción de la vacante

Mentor Talent Acquisition is seeking a Backend Engineer in Vienna to design, build and scale backend services using Python. You will work on API development, data pipelines and AI-powered product features, collaborating with product and frontend teams in a cross‑functional setup.

The role emphasizes strong backend fundamentals with potential growth into data engineering and AI product work, supported by an international team and modern tech stack.

Formación

• Strong Python programming and backend development experience.
• Experience building and operating production software.
• Solid understanding of object-oriented design and software principles.
• Solid SQL knowledge and experience with AWS data services is a plus.
• Experience designing or consuming REST APIs and working with Git and CI/CD.
• Analytical problem-solving and ability to take ownership of work.

Responsabilidades

• Design, build and maintain scalable backend services using Python.
• Develop new product features and reusable backend architectures.
• Build reliable APIs, integrations and business logic.
• Improve system performance, reliability, security and maintainability.
• Identify bottlenecks and improve the platform.
• Participate in architecture discussions and tech decisions.
• Expose system capabilities through secure interfaces.
• Build production-ready features powered by LLMs and integrate into products.

Conocimientos

Python

Production software

OOP principles

SQL

AWS

REST APIs

Git CI/CD

Analytical skills

Ownership

Herramientas

Docker

Kubernetes

Terraform

GraphQL

ClickHouse/Redshift

Descripción del empleo

Descripción del trabajo

Location: Vienna, Austria

Remote option available with quarterly office visits for one week in Vienna.

About the company

This is one of Austria's most exciting scale‑ups, having recently raised more than €15 million. The team is ambitious and international, working on an exciting AI‑first product with the opportunity to work with modern technologies while helping shape the future of finance.

The company empowers business leaders to make better strategic decisions in financial management, reporting and planning. Its mission is to help companies connect, analyze, forecast and automate all their financial data in one place.

It is backed by renowned investors, including Atlantic Labs, CommerzVentures and founders of Wefox, and is building the next generation of AI‑native finance software.

The Mission

The company is looking for a Backend Engineer to help connect its backend and data infrastructure with LLM‑powered features, agents and self‑service capabilities. This role is primarily backend‑focused: designing and building scalable services, APIs and business logic using Python.

Experience with data engineering (ETL/ELT pipelines, AWS data services, dimensional modelling) is a strong advantage and something the team will actively help develop further, but it is not a requirement. What matters most is strong backend engineering fundamentals combined with curiosity and a genuine interest in eventually working across data and AI product engineering as well. Backend and Data Engineering work closely together at the company, and engineers benefit from understanding both worlds. Someone who comes in strong on backend will be supported in growing into data engineering over time.

Responsibilities

Backend Engineering

• Design, build and maintain scalable backend services using Python.
• Develop new product features and reusable backend architectures.
• Build reliable APIs, integrations and business logic.
• Improve system performance, reliability, security and maintainability.
• Identify technical bottlenecks and continuously improve the platform.
• Participate in architecture discussions and technical decision‑making.
• Expose existing system capabilities through clear, secure and well‑structured interfaces.

AI Product & Agent Engineering

• Build production‑ready product features powered by large language models.
• Integrate LLMs into existing products, workflows, backend services and data systems.
• Expose complex business logic and system capabilities to AI models through structured APIs, tools and agent interfaces.
• Design reliable AI workflows using tool calling, structured outputs, retrieval and multi‑step agent processes.
• Contribute to prompt design, context management and model selection.

Cross-functional Collaboration

• Collaborate closely with Product, Frontend and other engineers.
• Translate product requirements into robust technical solutions.
• Write clean, maintainable, well‑tested and well‑documented code.
• Share knowledge across teams and continuously improve engineering standards.
• Take ownership from problem definition through implementation and production operation.

Skills

Core Skills

• Strong Python programming skills.
• Experience building and operating production software.
• Good understanding of object‑oriented programming and software design principles.
• Solid SQL knowledge.
• Experience with AWS.
• Experience designing or consuming REST APIs.
• Experience with Git and CI/CD.
• Strong analytical and problem‑solving skills.
• Ability to work independently and take ownership.

Nice to Have

• Experience with ETL or ELT pipelines.
• Experience with dimensional data modelling or Medallion Architecture.
• Experience with Docker and Kubernetes.
• Familiarity with GraphQL or Terraform / Infrastructure as Code.
• Experience with ClickHouse, Redshift or other analytical databases.
• Experience building LLM‑backed product features, RAG, embeddings or agent frameworks (e.g. MCP).

What Matters Most

The ideal candidate is curious, pragmatic and eager to learn. Being strong in both backend and data engineering from day one isn't required - what matters most is bringing strong backend fundamentals and motivation to grow.

The most important factors, above specific tech stack breadth, are:

• Character and ownership
• Curiosity and a strong willingness to learn
• Pragmatic problem‑solving
• Product thinking
• A strong quality mindset
• Passion for building useful products

What's On Offer

• Join one of Europe's most exciting AI‑first finance start‑ups.
• Take significant ownership and responsibility from day one.
• Grow from a strong backend foundation into data and AI product engineering.
• Learn from experienced engineers and continuously broaden your technical skill set.
• Shape the architecture of a modern AI‑native finance platform.
• Work with a highly motivated international team.
• Use modern technologies and engineering practices.
• Office in the heart of Vienna, or remote with quarterly office weeks in Vienna.
• Competitive compensation, equity participation and meaningful opportunities for personal and professional growth.

Build the future of AI‑powered finance.