Senior Full Stack Engineer

hace 1 semana

Barcelona, Barcelona, España Find A tiempo completo 60.000 € - 100.000 € al año

We're looking for a Senior Full Stack Engineer who brings strong technical expertise across backend and frontend development. You'll work across our internal platform to build scalable, reliable, and secure systems. This role is focused on hands-on engineering, delivering high-quality features end-to-end, and collaborating closely with product, design, and other engineering teams.

Responsibilities
  • Backend (Core Focus):
  • Build and maintain backend services using ) and TypeScript
  • Develop and optimize APIs, integrations, and data-processing flows
  • Model, query, and optimize relational and document data using PostgreSQL and MongoDB
  • Implement and maintain asynchronous workflows and event-driven components using RabbitMQ
  • Work with Elasticsearch to implement robust, scalable search functionality
  • Ensure code quality, performance, and reliability across backend components
  • Write clear documentation for services, data flows, and technical decisions

Frontend (Platform/Internal Tools):
  • Build internal tools, admin panels, and data management interfaces
  • Develop lightweight frontend components using TypeScript and modern web frameworks
  • Integrate frontend and backend systems securely and efficiently
  • Infrastructure & Collaboration
  • Work with AWS and Docker to deploy and operate services
  • Participate in CI/CD processes and trunk-based development
  • Troubleshoot issues across the entire stack and propose meaningful improvements.
  • Collaborate with cross-functional teams to integrate Nucleus across products and services
  • Contribute to improving engineering processes, standards, and workflows
Requirements
  • 4+ years of experience as a Full Stack or Backend Engineer
  • Strong hands-on experience with: ), TypeScript, PostgreSQL
  • Strong hands-on experience with: MongoDB, RabbitMQ, Elasticsearch, AWS, and Docker
  • Experience building and maintaining production systems at scale
  • Experience with CI/CD and trunk-based development

Nice to Have
  • Experience with observability tools (logging, metrics, tracing)
  • Strong understanding of system design, APIs, and performance optimization
  • Familiarity with event-driven systems and messaging patterns
  • Strong collaboration and communication skills
  • Experience with service integrations across multiple teams
  • Familiarity with data compliance and security best practices

 is an Equal Opportunity / Affirmative Action employer committed to diversity in the workplace. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, age, national origin, disability, protected veteran status, gender identity or any other factor protected by applicable federal, state, or local laws.

  • Senior Full Stack Angular + .NET Developer

    hace 2 semanas

    Barcelona, Barcelona, España Stack Overflight A tiempo completo 69.120 € - 87.900 € al año

    At Stack Overflight, we are looking for a Senior Full Stack Angular + .NET Developer to join our software development team. As a key member of our team, you will work on important and challenging projects for our clients. You will be responsible for designing, implementing, and maintaining high-quality, scalable, and reliable backend solutions.Key...

  • Senior Full Stack Engineer

    hace 1 semana

    Barcelona, Barcelona, España threesixfive A tiempo completo 60.000 € - 120.000 € al año

    Threesixfive is working with an exciting e-commerce technology company. Founded in 2019 in London, the company was started by 3 serial entrepreneurs passionate about ecommerce. Their mission? To make ecommerce integrations painless for the world's best and fastest-growing brands.Using their own proprietary platform and an incredible team, they now automate...

  • Senior Full Stack JavaScript Engineer

    hace 2 semanas

    Barcelona, Barcelona, España Passion A tiempo completo 60.000 € - 120.000 € al año

    Build the Future - Power Full Stack Experiences (and explore AI along the way)Do you…..dream in code{JS} speak fluent JavaScripttinker with AI projects just for fun?At , we empower creators to launch impactful mobile apps that change lives. We're on a mission to build game-changing experiences, and we need a Senior Full Stack JavaScript Engineer who can...

  • Full Stack Engineer

    hace 5 días

    Barcelona, Barcelona, España Aetion A tiempo completo 40.000 € - 80.000 € al año

    WELCOME to Aetion, a Datavant company Aetion and Aetion's leadership are recipients of several prestigious awards: 's 2024 List of Best Companies for Equal Advancement OpportunitiesDigital Health New York's 2024 New York Digital Health 100Newsweek's World's Best Digital Health Companies of 2024 Come join us PERKS of being an A-Teamer: 25 vacation...

  • Full Stack Engineer

    hace 1 semana

    Barcelona, Barcelona, España Aetion A tiempo completo 45.000 € - 90.000 € al año

    WELCOME to Aetion, a Datavant company We are a global leader in science-driven technology using real-world evidence to provide innovative healthcare solutions. Our Discover and Substantiate applications, powered by the Aetion Evidence Platform, are used to evaluate the safety, effectiveness and value of medications, delivering better outcomes to patients,...

  • Full Stack Engineer

    hace 5 días

    Barcelona, Barcelona, España MarsBased A tiempo completo

    MarsBased is adevelopment agencyfrom Barcelona offering end‑to‑end web & mobile apps built withRuby on Rails,ReactandJavaScript. We believe inremote work,clean code, anddelivering quality over quantityWe're looking for aseniorfull-stack engineerto join our Martian team, with strong knowledge ofandReact.You'll be joining a small, senior, and...

  • Senior Full-Stack Engineer

    hace 2 semanas

    Barcelona, Barcelona, España Appodeal A tiempo completo 60.000 € - 120.000 € al año

    Appodeal is a dynamic US-based product company with a truly global presence.We have offices in Warsaw, Barcelona and Virginia along with remote team members located around the world.Our company thrives on diversity, collaboration, and innovation, making us a leader in the mobile app monetization space.Why Appodeal?At Appodeal, we're more than just a...

  • Full Stack Engineer

    hace 5 días

    Barcelona, Barcelona, España Aetion, a Datavant Company A tiempo completo 40.000 € - 120.000 € al año

    WELCOME to Aetion, a Datavant companyWe are a global leader in science-driven technology using real-world evidence to provide innovative healthcare solutions. Our Discover and Substantiate applications, powered by the Aetion Evidence Platform, are used to evaluate the safety, effectiveness and value of medications, delivering better outcomes to patients,...

  • Senior Full-Stack Java

    hace 5 días

    Barcelona, Barcelona, España Aubay Spain A tiempo completo 40.000 € - 80.000 € al año

    Senior Full-Stack Java / Angular Developer + AWSModelo híbrido teletrabajo (2 días presenciales, 3 días en remoto) - Cerca Metro BogatellFunciones:Colaborar en la implementación de interfaces dinámicas utilizandoAngularJS.Participación en la migración de toda la infraestructura aAWS.Gestionar bases de datos y su migración a servicios gestionados de...

  • Full Stack Developer

    hace 4 días

    Barcelona, Barcelona, España Ultimate Asset A tiempo completo

    Role: Senior Full Stack Engineer (5–7 yrs experience), BarcelonaWhilst we prefer candidates who are already based in Barcelona and are local, we will also consider EU citizens who are able to move to Barca. Some limited settling in assistance can be provided by the business. Our client is not able to offer Visas or sponsorship to Non-EU passport holders...