Senior Software Engineer, Payments Platform at Scale

United States Digital Space LLC; United States; Hybrid; USD 120,000 - 160,000; Full time

Benefits offered by this job

Annual bonus up to 20% of base salary

Private medical insurance

Flexible working

Job summary

United States Digital Space LLC is seeking a Senior Software Developer to own the development and support of payments platforms. You will shape design and architecture, mentor teammates, and deliver high-impact, business-critical systems at scale.

The stack includes .NET/C#, Java, Cassandra, Docker, HAProxy and Azure DevOps with a strong DevOps culture. Expect testing automation, ongoing improvements, and collaboration with product teams across global sites.

Qualifications

• Experience with .NET/C# and/or Java in enterprise settings.
• Experience with SQL/NoSQL databases and data modeling.
• Experience with cloud platforms (AWS, Azure).
• Proven along TDD and agile delivery in payments domain a bonus.
• Strong interpersonal communication and collaboration skills.
• Familiarity with ecommerce payments is advantageous.

Responsibilities

• Develop and maintain scalable frontend systems using .NET/C# and/or Java.
• Produce test-driven features and drive quality through the TDD cycle.
• Apply software design principles to build maintainable systems.
• Collaborate with product stakeholders to translate needs into value.
• Break tasks into increments to manage risk on large projects.
• Lead design discussions, mentor teammates, and drive best practices.
• Support production systems, resolve incidents, and learn from them.
• Share knowledge with the wider engineering community.
• Produce proofs-of-concept to evaluate new tools and approaches.

Skills

.NET/C# and/or Java

SQL/NoSQL databases

Cloud platforms

Agile & TDD

Interpersonal skills

Ecommerce payments familiarity

Tools

Cassandra

Docker

HAProxy

Azure DevOps

Job description

United States Digital Space LLC is seeking a Senior Software Developer to own the development and support of payments platforms. You will shape design and architecture, mentor teammates, and deliver high-impact, business-critical systems at scale.

The stack includes .NET/C#, Java, Cassandra, Docker, HAProxy and Azure DevOps with a strong DevOps culture. Expect testing automation, ongoing improvements, and collaboration with product teams across global sites.