Senior fullstack engineer

Job Description 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 in charge of developing cross-platform applications for network optimisation automation, performance monitoring and evaluation, data analytics and visualisation using the latest data science techniques and software development best practices. We're 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 the AI and when to take the wheel. As part of your role, you will… Back-End Develop in Python, using libraries such as FastAPI, Flask, Pandas, and NumPy. Work with SQL and NoSQL databases. Use efficient architectures based on microservices and distributed systems using Docker, Kubernetes, Kafka, Linux, and AWS. Front-End Develop modern components using TypeScript and ReactJS. Implement responsive and accessible interfaces with TailwindCSS. Across the stack Use AI-assisted development tools (such as Claude, GitHub Copilot or similar) to enhance and accelerate code 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. The position is based in Spain, and thanks to our flexible working model, you can choose whether you prefer to work fully remotely, in a hybrid format, or from the office. Requirements +4 years of experience in software development. Strong experience in Back-End development with Python , especially using frameworks such as FastAPI and Flask, and libraries like Pandas and NumPy . Strong 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 working with SQL and NoSQL databases . Familiarity with cloud environments (e.g., AWS, Azure, or GCP ). Knowledge of containerisation 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 application 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 have • Familiarity with mobile network KPIs, alarms, OSS concepts and 4G/5G network data structures. Benefits 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 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!