Software Engineer (Platform Experience) at Smadex SLU

Setup: Hybrid
Location: Barcelona, Catalonia
Type: Full-time
Posted: Jul 8, 2026

Description

Smadex is seeking a Software Engineer specializing in Platform Experience to join their team in Barcelona. This full-time, entry-level position involves implementing Agentic AI integration using LangChain and AWS Bedrock, building scalable backend services with Node.js, managing cloud infrastructure with AWS WAF and CloudFront, and owning the entire product lifecycle from architecture to deployment. The ideal candidate will possess a Bachelor's degree in Computer Science or a related field, along with experience in professional software development, preferably with Node.js or Angular.

Required Skills

LangChain
AWS Bedrock
Node.js
Angular/TypeScript
RESTful APIs
Git flows
Linux
AWS EC2
AWS S3
AWS WAF
CloudFront
Elasticache
Route53
RDS
MySQL
Memcached
Jenkins
Docker
Kubernetes
Grafana
Kibana

Additional Information

Required Previous Experiences: Experience in professional software development (ideally with Node.js or Angular).
Preferred Qualifications: Deep knowledge of Angular/TypeScript and a solid grasp of how to interact with RESTful APIs efficiently.
Strong Node.js skills and a focus on scalability, security, and data integrity.
write clean, testable code and care about performance and security (AWS S3/WAF/CloudFront).
Curiosity for AI: You’ve experimented with (or are eager to master) LLMs and AI orchestration tools.
Familiarity with Git flows and basic clean code principles.
Good reading and writing skills (technical documentation is in English).
Basic Linux skills and comfort working with a terminal.
Experience with Angular or Node.js.
Experience with AWS (EC2, S3, WAF, Cloudfront, Elasticache, Route53, RDS, Bedrock…)