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# Senior Fullstack Engineer

- **Company:** Future Connections
- **Location:** Madrid, Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** 4G (Telecommunication), Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, User Authentication, Microsoft Azure, Software Quality, Linux, Distributed Systems, Python (Programming Language), NoSQL, SQL Databases, Systems Integration, TypeScript, Wireless Networks, Workflow Management Systems, Data Logging, Google Cloud, GitHub Copilot, Flask (Web Framework), Backend, Fastapi, Pandas, Kubernetes, Data Analytics, Performance Monitor, Apache Kafka, Front End Software Development, Restful APIs, Dynatrace, Api Management, Docker, Microservices
- **Published:** August 22, 2026
- **Apply:** https://www.buscojobs.com.es/senior-fullstack-engineer-en-madrid-ID-368207965

## About the Role

This is not an entry-level profile: we need someone with realhands-on experience who knows when to trust the AI and when to take the wheel.As part of your role, you will...Back-EndDevelop in Python,using libraries such as FastAPI, Flask, Pandas, and NumPy.Work with SQL andNoSQL databases.Use efficientarchitectures based on microservices and distributed systems using Docker,Kubernetes, Kafka, Linux, and AWS.Front-EndDevelop moderncomponents using TypeScript and ReactJS.Implement responsiveand accessible interfaces with TailwindCSS.Across the stackUse AI-assisteddevelopment tools (such as Claude, GitHub Copilot or similar) to enhanceand accelerate code development, on both Back-End and Front-End.Youwill work in a collaborative, multivendor and multicustomer environment,contributing to projects for major wireless operators in Spain and acrossEurope.
You'll operate within virtualised and cloud-based infrastructures (AWS,Azure, GCP), and will have the freedom to propose new tools, frameworks ormethodologies to improve our applications.
The position is based in Spain, andthanks to our flexible working model, you can choose whether you prefer to workfully remotely, in a hybrid format, or from the office.Requirements +4 years of experience in software developmentStrong experience inBack-End development with Python, especially using frameworks such asFastAPI and Flask, and libraries like Pandas and NumPyStrong experience designing and integrating REST APIs, with familiarity with API contracts, authentication and service-to-service communication.Experience developing distributed, event-driven applications using technologies such as Kafka, asynchronous processing and microservice architectures.Proficient in TypeScript with experience developing Front-End applications using React.Experience workingwith SQL and NoSQL databases .
Familiarity withcloud environments (e.G., AWS, Azure, or GCP ).
Knowledge ofcontainerisation and orchestration tools such as Docker and Kubernetes .
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 a pplication monitoring, structured logging, metrics and distributed tracing in cloud-native environments.Experience implementing unit, integration, end-to-end and API contract testing to ensure software quality and maintainability.English level B2 or higher (spoken and written).

## Description

Anywhere within Spain, Spain | Posted on 10/08/2026Onthis occasion, we are looking for a Senior Full-Stack Engineer to joinour Network Intelligence area.As a Future Connections Developer, you will bepart of a multidisciplinary team of Telco engineers and software developers incharge of developing cross-platform applications for network optimisationautomation, performance monitoring and evaluation, data analytics andvisualisation using the latest data science techniques and software developmentbest practices.We'relooking for someone who genuinely embraces AI-assisted development as a corepart of how they work - using tools like Claude, GitHub Copilot or similar todesign, build and ship faster - while still applying solid engineeringjudgement to review, validate and take ownership of everything that goes intoproduction.This is not an entry-level profile: we need someone with realhands-on experience who knows when to trust the AI and when to take the wheel.As part of your role, you will...Back-EndDevelop in Python,using libraries such as FastAPI, Flask, Pandas, and NumPy.Work with SQL andNoSQL databases.Use efficientarchitectures based on microservices and distributed systems using Docker,Kubernetes, Kafka, Linux, and AWS.Front-EndDevelop moderncomponents using TypeScript and ReactJS.Implement responsiveand accessible interfaces with TailwindCSS.Across the stackUse AI-assisteddevelopment tools (such as Claude, GitHub Copilot or similar) to enhanceand accelerate code development, on both Back-End and Front-End.Youwill work in a collaborative, multivendor and multicustomer environment,contributing to projects for major wireless operators in Spain and acrossEurope.You'll operate within virtualised and cloud-based infrastructures (AWS,Azure, GCP), and will have the freedom to propose new tools, frameworks ormethodologies to improve our applications.The position is based in Spain, andthanks to our flexible working model, you can choose whether you prefer to workfully remotely, in a hybrid format, or from the office.Requirements +4 years of experience in software developmentStrong experience inBack-End development with Python, especially using frameworks such asFastAPI and Flask, and libraries like Pandas and NumPyStrong experience designing and integrating REST APIs, with familiarity with API contracts, authentication and service-to-service communication.Experience developing distributed, event-driven applications using technologies such as Kafka, asynchronous processing and microservice architectures.Proficient in TypeScript with experience developing Front-End applications using React.Experience workingwith SQL and NoSQL databases .Familiarity withcloud environments (e.G., AWS, Azure, or GCP ).Knowledge ofcontainerisation and orchestration tools such as Docker and Kubernetes .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 a pplication monitoring, structured logging, metrics and distributed tracing in cloud-native environments.Experience implementing unit, integration, end-to-end and API contract testing to ensure software quality and maintainability.English level B2 or higher (spoken and written).Nice to haveFamiliarity with mobile network KPIs, alarms, OSS concepts and 4G/5G network data structures.Competitive salary, health insurance and Flexible Compensation Plan as an enterprise benefitAnnual 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 flexibilityboth 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 globalWe provide a flexible 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!#J-*****-Ljbffr


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