Python Finance Developer (100% Remote)

UBQ; Madrid; Remote; EUR 65,000 - 95,000; Full time

Job summary

UBQ.io is seeking a Finance Developer to build an internal web platform for portfolio management. You will own features end-to-end, from data queries and calculation logic to the user interface, joining finance and technology to deliver reliable tools.

Key responsibilities include designing platform features, implementing valuation/P&L logic, ensuring data reconciliation, and SQL optimisations on BigQuery. A strong finance background and Python expertise are required.

Qualifications

• Solid professional experience with Python, including building backend services or data applications.
• A good understanding of financial concepts: positions, P&L, NAV, exposure and cost basis.
• Comfort writing non-trivial SQL, ideally on BigQuery or another cloud warehouse.
• A strong eye for detail and a habit of testing and reconciling numbers until they're right.
• Clear communication, and the confidence to challenge and clarify requirements with finance teams.
• A MSc in Finance, or progress towards CFA/CAIA (Level I or above).

Responsibilities

• Design, build and maintain platform features, including summary metrics, interactive tables and data visualisations.
• Translate financial methodologies such as valuation, P&L attribution, exposure and cost basis into backend logic.
• Ensure figures reconcile against source systems and reporting.
• Write and optimise SQL queries against the cloud data warehouse.
• Maintain fast and reliable platform through caching, perf tuning and robust error handling.
• Collaborate with finance and operations stakeholders to gather requirements and deliver improvements.

Skills

Python

SQL

Financial concepts

Testing & reconciliation

Communication

BigQuery

Redis

Google Cloud

React/Frontend knowledge

TypeScript

Education

MSc in Finance

CFA/CAIA progress (Level I+)

Tools

BigQuery

Redis

Google Cloud

React

TypeScript

Pydantic

Job description

About UBQ.io

UBQ.io is a global technology service provider dedicated to building a more sustainable, independent, and equitable future. We partner with global companies across industries, including AI, blockchain, software, biotech, and education, to transform bold ideas into real, meaningful solutions.

Our expertise spans technology consulting, AI and Machine Learning development, Blockchain integration, and global team collaboration. With a worldwide network of specialists, we help organizations stay ahead in a rapidly evolving digital landscape.

At UBQ.io, we don’t just advise, we collaborate. Our commitment to innovation, sustainability, and social responsibility guides everything we do as we help clients build technologies that empower people, communities, and industries to thrive.

About the role

We are looking for a Finance Developer to join our team and help build an internal web platform that supports portfolio management for our finance and operations teams. Working at the intersection of

finance and technology, you will turn financial data and business requirements into accurate, reliable tools. You will own features from end to end, from data queries and calculation logic through to the user interface.

What you'll do

• Design, build and maintain platform features, including summary metrics, interactive tables and data visualisations.

• Translate financial methodologies such as valuation, P&L attribution, exposure and cost basis into clean, well-tested backend logic.

• Make sure every figure reconciles accurately against source systems and existing reporting.

• Write and optimise SQL queries against our cloud data warehouse.

• Keep the platform fast and reliable through caching, performance tuning and robust error handling.

• Work closely with finance and operations stakeholders to gather requirements, validate results and deliver improvements.

Our stack

• Backend: Python, FastAPI, Pydantic, Google BigQuery, Redis

• Frontend: React, TypeScript, Vite, TanStack Query, Recharts, Tailwind CSS

• Infrastructure: Google Cloud (Cloud Run), Google sign-in

• Solid professional experience with Python, including building backend services or data applications.

• A good understanding of financial concepts: positions, P&L (daily, MTD, YTD, ITD), NAV, exposure and cost basis.

• Comfort writing non-trivial SQL, ideally on BigQuery or another cloud warehouse.

• A strong eye for detail and a habit of testing and reconciling numbers until they're right.

• Clear communication, and the confidence to challenge and clarify requirements with finance teams.

• A MSc in Finance, or progress towards a professional qualification such as CFA or CAIA (Level I or above), or equivalent.

Advantageous

• Front-end experience with React and TypeScript, especially data-heavy UIs.

• Experience with BI and reporting tools, or building analytics dashboards.

• A background in asset management, fund administration, treasury or fintech.

• Familiarity with multi-asset portfolios, e.g. equities, fixed income, digital assets and commodities.

• Experience with Google Cloud and caching strategies.