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# Software Engineer

- **Company:** Aifi
- **Location:** Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** JavaScript (Programming Language), Unit Testing, C Sharp (Programming Language), Computer Engineering, Command-Query Responsibility Segregation (Software Development), Event-Driven Programming, Python (Programming Language), PostgreSQL, MongoDB, Node.Js, SQL Databases, TypeScript, Web Applications, Real Time Systems, ReactJS, Backend, Kubernetes, Information Technology, React Native, Front End Software Development, Event Sourcing, NestJS, Restful APIs, Domain Driven Design, Docker, Golang, Microservices
- **Published:** August 16, 2026
- **Apply:** https://es.trabajo.org/oferta-4021-a79be4d8c3f8db8d8ae0d53476491ea7

## About the Role

Responsibilities - Lead on optimizing our highly concurrent systems - Scale the store operating systems from small stores to gigantic venues - Make design decisions in the process of developing our core backend microservices - Work closely with app developers and product managers to understand the use cases that we need to cover and their potential bottlenecks - Work with deployment engineers to ensure that what you build goes as quickly as possible to the clients Requirements - BS/MS in computer science or related field - 3+ years of experience as a Software Engineer (Backend) - 2+ years of experience using TypeScript - 2+ years of experience working in node.js for web applications backend - Highly skilled in unit testing, experience with Jest testing framework - Highly skilled in RESTful API design and REST API usage - Proficiency with data modeling, static typing, and SQL - Proficiency in using Docker - Experience with event driven or real-time systems - Experience with
TypeScript / JavaScript backend frameworks (e.g. NestJS) - Experience with Python, GoLang, or C# - Experience with Kubernetes - Experience with Postgres - Experience with Frontend Development (React, React Native) is a plus - Experience with Domain Driven Design, Event Sourcing and CQRS is a plus Preferred Additional Qualifications - MS or PhD in Computer Science, Computer Engineering or a related field - Skilled in Kubernetes, experience with kustomize or helm - Experience with MongoDB - Experience with gRPC - Experience in e-commerce software, checkout processes, payments, virtual POS or other related systems AiFi is an equal opportunity employer committed to fostering an inclusive, diverse, and equitable workplace. We do not discriminate on the basis of race, color, religion or belief, national origin, sex, gender identity or expression, sexual orientation, age, marital status, veteran status, disability, or any other status protected by

## Description

applicable law. We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.


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