Full-Stack Developer

TST SERVICIOS
Barcelona, Spain
3 days ago

Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Working hours
Regular working hours
Languages
English
Experience level
Junior

Job location

Barcelona, Spain

Tech stack

JavaScript
Microsoft Excel
API
Amazon Web Services (AWS)
User Authentication
Azure
Spreadsheets
Data Integration
ETL
Django
Python
Performance Tuning
Data Streaming
Systems Integration
TypeScript
Data Processing
React
Flask
Spark
Backend
FastAPI
Vba Programming Language
Front End Software Development
REST
Data Pipelines
Databricks
Microservices

Job description

We are building an internal sustainability data-driven application and are looking for a Full-Stack Developer with strong frontend expertise and solid backend/data integration skills.

You will primarily focus on building a polished, production-quality frontend while integrating with Python-based backend services and Databricks-powered data pipelines.

What You'll Work On

  • A full-featured internal product UI (not just dashboards)
  • Backend services that connect frontend data pipelines
  • Integration with Databricks workflows (batch data processing, GB-scale datasets)

Responsibilities

  • Develop a modern, scalable frontend application (likely React or similar)
  • Implement backend APIs using Python (FastAPI, Flask, or similar)
  • Integrate frontend with data processed via Databricks pipelines
  • Collaborate with the team to implement existing architecture (not design from scratch)
  • Ensure smooth data flow between UI and backend services
  • Write clean, maintainable, and well-tested code

Requirements

  • Strong frontend experience (React, Vue, or similar frameworks)
  • Solid JavaScript/TypeScript skills
  • Experience building product-grade UIs (not just simple dashboards)
  • Python backend development (FastAPI, Flask, or Django)
  • Experience consuming and building REST APIs
  • Basic understanding of data pipelines and ETL workflows
  • Strong Excel and VBA proficiency, including deciphering complex spreadsheet models and reprogramming their functionality into robust Python-based applications.
  • Comfortable working in a team and executing defined tasks

Nice to Have

  • Experience integrating with Databricks or Apache Spark environments
  • Understanding sustainability or ESG Data
  • Familiarity with data-heavy applications
  • Experience with authentication, state management, and performance optimization
  • Exposure to cloud environments (AWS, Azure, or GCP)

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