Anywhere within Spain, Spain | Posted on 09/09/2026 On this occasion, we are looking for a

Senior

Full-Stack Engineer

to join our Network Intelligence area. As a Future Connections developer, you will be part of a multidisciplinary team of Telco engineers and software developers building cross-platform applications for

network optimisation, automation , performance monitoring and evaluation, data analytics and visualisation. The core of this role is data.

Our applications ingest large volumes of network performance data, transform it, analyse it, and surface it to engineers who act on the results. You will spend a substantial part of your time working with data in Python, building the transformations, the analysis and the pipelines behind them, and the rest exposing that work through APIs and interfaces engineers rely on during live operations. We're also looking for someone who genuinely embraces AI-assisted development as a core part of how they work, using tools like Claude, GitHub Copilot or similar to design, build and ship faster, while still applying solid engineering judgement to review, validate and take ownership of everything that goes into production. This is not an entry-level profile: we need someone with real hands-on experience who knows when to trust AI and when to take the wheel. As part of your role, you will…

Data & analytics

Transform and analyse large volumes of network performance data in Python with

Pandas and NumPy . Build and maintain

data pipelines , batch and streaming, with attention to correctness, completeness and behaviour under load. Model analytical data and work with modern storage formats. Back-End

Develop Python services with

FastAPI and Flask , exposing the analytical layer through REST APIs. Work with SQL and NoSQL databases.



Use efficient architecture based on microservices and distributed systems with Docker, Kubernetes,

Kafka , Linux and AWS. Front-End

Develop modern components using TypeScript and ReactJS. Implement responsive and accessible interfaces with TailwindCSS, including data visualisation for operational use. Across the stack

Use AI-assisted development tools (such as Claude, GitHub Copilot or similar) to enhance and accelerate development, on both Back-End and Front-End. You will work in a collaborative, multivendor and multicustomer environment, contributing to projects for major wireless operators in Spain and across Europe. You'll operate within virtualised and cloud-based infrastructures (AWS, Azure, GCP), and will have the freedom to propose new tools, frameworks or methodologies to improve our applications. Requirements

+4 years

of experience in software development. Strong data work in Python: transforming and analysing datasets with Pandas and NumPy.

This is the core competency for the role. Hands-on Back-End Python

with frameworks such as FastAPI and Flask. Experience building

data pipelines

at volume, batch and/or streaming, including data quality, consistency and completeness across large datasets. Experience developing

distributed, event-driven applications

using technologies such as Kafka, asynchronous processing and microservice architectures. Strong experience designing and integrating

REST APIs , with familiarity with API contracts,



authentication and service-to-service communication. Proficient in

TypeScript

with experience developing Front-End applications using

React . Experience working with

SQL and NoSQL

databases. Knowledge of containerisation and orchestration tools such as

Docker and Kubernetes . Familiarity with cloud environments (e.g. AWS, Azure or GCP). Solid, hands‑on experience using

AI-assisted development tools

across the full stack — able to prompt, review and validate AI-generated code with confidence. Familiarity with application

monitoring, structured logging, metrics and distributed tracing

in cloud-native environments. Experience implementing

unit, integration, end-to-end and API contract testing . English level B2 or higher Nice to have

Familiarity with mobile network KPIs, alarms, OSS concepts and 4G/5G network data structures. We do not expect a telecom background, but curiosity about it. Competitive salary, health insurance and Flexible Compensation Plan as an enterprise benefit Annual training budget to help you stay technologically up to date and grow professionally. Time flexibility: our life is not just a working day; we give you flexibility both in entry and exit. In addition, we enjoy a reduced working day on Fridays and Summer (July and August) Our projects are cutting-edge in technology and are in both national and international environments, making your growth global We provide a adaptable working mode l, adapted to the needs of each role and team, with options from remote to hybrid or office-based arrangements. Our employee satisfaction survey tells us that we have a great work environment and great professionals in the company. Do you want to check it? Join us!

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📌 Senior Full-Stack Engineer - Network Data & Analytics (Madrid)
🏢 Future Connections
📍 Madrid