Senior Backend Engineer - C#/.NET Microservices

Access Softek; United States; Remote; USD 120,000 - 160,000; Full time

Benefits offered by this job

Flexible working hours

Experienced development teams

Long-term employment

Competitive salary

Paid vacation and holidays

Paid sick leave and internal medical保险

Mental health coverage

Training and education compensation

Community of practice and knowledge分享

Equipment provided

Internet allowance $50/month

Staff Handbook details

Job summary

Access Softek is seeking a Senior Back End Developer (C#) to join our Banking Platform Team in the United States. You will work on core services behind our online banking platform, collaborating with product managers and QA in a distributed team to deliver high-scale backend solutions.

Expect to shape architecture, modernize legacy systems, and apply AI-assisted tooling to boost productivity while maintaining security and quality. Overlapping 2 AM–10 AM PST is required.

Qualifications

• 5+ years building web apps /backend APIs in C#.
• Proven experience making architectural decisions and owning technical trade-offs.
• Strong OOD principles, classic design patterns (GoF).
• Experience with microservices architecture, as well as working with and modernizing legacy systems.
• Strong data modeling / MS SQL / data access optimization.
• Experience with API design, implementation, and troubleshooting.
• Unit & integration testing (NUnit/xUnit, FluentAssertions, Moq).
• Comfortable owning code from commit to production, with strong CI/CD and Git-based workflow experience.
• Understanding of web security fundamentals and secure coding practices.
• Comfortable using AI tools as a core part of daily engineering work — applied to production-quality code.
• Experience integrating LLM/AI features into products.

Responsibilities

• Lead design and delivery of complex features, from ideation to production.
• Proactively identify problems and drive technical decisions with minimal oversight.
• Use AI-assisted tools to accelerate delivery, critically validating output for correctness and security.
• Produce clear documentation for API consumers.
• Drive automated test coverage for your components.
• Own and evolve code within your product area, including microservices architecture.
• Modernize legacy functionality and improve maintainability of existing solutions.
• Follow engineering best practices around code review, version control, CI/CD, and secure development.
• Investigate issues, analyze logs and telemetry, and deliver safe, reliable fixes.
• Share knowledge and help improve team development practices.

Skills

5+ years web/backend APIs in C#

Architectural decisions

OOD principles

Microservices

MS SQL

API design

Unit & integration testing

CI/CD

Web security

AI tools daily

LLM/AI features

English proficiency

Tools

Git

CI/CD tooling

Job description

Access Softek is seeking a Senior Back End Developer (C#) to join our Banking Platform Team in the United States. You will work on core services behind our online banking platform, collaborating with product managers and QA in a distributed team to deliver high-scale backend solutions.

Expect to shape architecture, modernize legacy systems, and apply AI-assisted tooling to boost productivity while maintaining security and quality. Overlapping 2 AM–10 AM PST is required.