Senior Full Stack Developer (Java & React) en Madrid o en remoto

We are looking for a Fullstack Developer with 3+ years of experience in Java (Spring Boot) and React. You should have fluent communication skills, an agile mindset, and a shared passion for leveraging and integrating Artificial Intelligence tools and frameworks into your daily workflow. You will join a dynamic team, participating in the entire product lifecycle under Spec-Driven Development (SDD) and AI-driven methodologies.*

🌱 Our Sngular Commitment: As a team committed to the fairness of our Equality Plan, at SNGULAR we promote a plural culture where talent knows no labels and everyone has the same opportunities. We work with respect, humility, and camaraderie, fully convinced that diversity makes us stronger.

What will you do?

• End-to-End Development: You will build robust and scalable solutions, from backend business logic to dynamic and intuitive frontend user interfaces.

• AI-Driven Engineering: You will research, apply, and promote the use of generative AI tools and code assistants to optimize development workflows, automate tasks, and accelerate delivery cycles.

• Modeling and Architecture: You will design and interpret Entity-Relationship Diagrams (ERDs) to structure data, ensuring consistency and a proper flow of information.

• Efficient Collaboration: You will work hand-in-hand with the team using Git for version control, guaranteeing best practices in continuous integration and deployment (CI/CD) under modern development approaches.

Responsibilities

• AI and Agent Integration: Research and implement modern AI frameworks to build intelligent features, work with autonomous agent architectures, and connect large language models (LLMs) with our system's capabilities.

• Advanced Architecture and AI: Implement and evolve systems based on microservices and hexagonal architecture, while also integrating vector databases to support semantic searches and AI contexts.

• Spec-Driven API Design: Design, build, and consume robust REST APIs using Spec-Driven Development (SDD) approaches, ensuring clear and automatable API contracts for both humans and AI agents.

• Modern Frontend Ecosystem: Manage complex client-side states using tools like React Redux, Pinia, or Zustand, powering development with TypeScript (JSX/TSX).

• Quality, Security, and Clean Code: Guarantee maximum software robustness by applying SOLID principles, Clean Code, solid testing strategies, advanced authentication/authorization systems, and specific security patterns for AI integration.

• Cloud Deployment and Infrastructure: Deploy and optimize our solutions across major Cloud environments (AWS, Azure, GCP, or similar), ensuring a scalable infrastructure for both our traditional and AI workloads.

• Working day

  Full time

• Location

  Spain

• Remote

  100%

• Vacations

  22 Days

Technologies and Skills

Mandatory

• Java

  Advanced

• JavaScript

  Advanced

Ideal

• React

  Advanced

• Apache Kafka

  Intermediate

Benefits

Budget for training

Welcome pack

Wellbeing pack

2 days for technical events

December 24th and 31st

Celebrate Your Birthday: Day Off

Free unlimited access to UDEMY

Ability to work in team in diverse

Additional bonuses: recommendations, being a speaker and writing technical articles.

Access to continuous training