Senior Software Engineer – POS & Cash Systems Compliance (Portugal)
Location: Remote (Portugal-based)
Contract Type: Full-time
About the Role
Our client, a European leader in fiscal middleware and POS system compliance, is seeking a Senior Software Engineer to join their growing team in Portugal. This role is ideal for someone with strong technical expertise in C#/. NET, a passion for building scalable solutions, and experience working directly with clients in the retail or hospitality sectors, particularly around cash register systems and POS integration .
You will contribute to the development of software that ensures compliance with the Portuguese fiscal laws, including SAF-T and standards compliant to the Autoridade Tributaria.
Key Responsibilities
* Design, develop, and maintain .NET-based middleware and POS/cash system integration solutions.
* Collaborate with product and compliance teams to implement features aligned with French fiscal regulations.
* Interface with clients to understand technical requirements and provide integration support.
* Participate in certification processes to meet AT standards.
* Write clean, maintainable code and contribute to architectural decisions.
* Experience with C#, .NET Core, ASP.NET
* Experience with POS systems and cash register software
* Middleware development and system integration
* Strong communication and facing experience
* Ability to work independently and in distributed teams
* Fluent English (B2+) and Portuguese native
Ideal Candidate
* 5+ years of experience in software engineering, ideally in retail tech or fiscal systems.
* Proven track record of working with cash systems and understanding of French fiscal law.
* Proficiency in C# and Cloud infrastructure
* Comfortable engaging with clients and certification bodies.
* Based in Portugal and able to work without any restrictions.
Why Join?
* Work on impactful technology that supports thousands of merchants across Europe.
* Be part of the first, international team.
* Opportunity to shape the future of fiscal compliance in France.
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