Sr .Net Developer
3B Staffing LLC, Minneapolis, MN, United States
Senior Software Engineer (Full-Stack, Backend-Leaning 70/30)
Overview
We are seeking a
Senior Software Engineer
with a strong
backend focus (70%)
and solid
frontend capabilities (30%)
to help build and scale our Student Management platform.
This role is ideal for an engineer who excels in
API design, data architecture, and system scalability , while also contributing to
user-facing features
when needed. You will play a key role in driving
technical excellence , shaping architecture, and leveraging
AI-assisted development tools
to improve productivity, code quality, and delivery speed.
Key Responsibilities
Backend (Primary Focus - ~70%)
Design, build, and maintain scalable
RESTful APIs and event-driven services
using .NET / C#
Own backend architecture, including system design, scalability, reliability, and performance
Design and optimize
MSSQL / Azure SQL
databases (data modeling, indexing, performance tuning)
Implement secure, maintainable, and efficient data access patterns
Contribute to
event-driven and distributed system design
Build observability into services (logging, monitoring, alerting)
Frontend (Secondary Focus - ~30%)
Develop and enhance
responsive web UI components
using modern JavaScript frameworks (Svelte, React, or similar)
Integrate frontend applications with backend APIs
Ensure usability, performance, and accessibility standards are met
Cross-Functional / Leadership
Translate business requirements into scalable technical solutions
Lead design and implementation of complex features
Write and maintain
automated tests
(unit, integration, end-to-end)
Conduct code reviews and enforce engineering best practices
Mentor engineers and contribute to team growth
Collaborate with product, UX, and other stakeholders
AI-DrivenDevelopment Expectations
Actively leverage
AI-assisted development tools
(e.g., code generation, test generation, documentation support)
Use AI to accelerate
development workflows, debugging, and refactoring
Apply critical thinking to validate AI-generated outputs for quality and security
Identify opportunities to integrate
AI capabilities into the product
where applicable
Promote best practices for responsible and effective AI usage within the team
Required Qualifications
5+ years of software engineering experience (backend-leaning)
Strong expertise in
.NET / C# and Web API development
Deep experience with
MSSQL / Azure SQL
Solid experience with
JavaScript, HTML, CSS , and modern frontend frameworks
Strong understanding of
API design, microservices, and event-driven architecture
Experience with
cloud platforms
(Azure preferred, AWS acceptable)
Hands-on experience with
CI/CD pipelines
(GitHub Actions or similar)
Strong understanding of
software design patterns
(MVC, SOLID, DDD)
Experience working in
Agile environments
Preferred Qualifications
Experience with
Svelte
or modern frontend frameworks
Familiarity with
Terraform or infrastructure as code
Experience with
Docker and Kubernetes
Knowledge of
authentication/authorization
(Auth0, OAuth, SSO)
Experience with
Cypress
or similar testing tools
Familiarity with
GitHub Advanced Security / DevSecOps practices
Experience with
event streaming or messaging systems
What You'll Bring
Strong ownership mindset with the ability to lead complex initiatives
Balance of
deep backend expertise
and
pragmatic frontend skills
Curiosity and adaptability, especially in leveraging
AI to improve engineering outcomes
Ability to mentor others and elevate team standards
What Success Looks Like
Scalable, reliable backend services powering core platform workflows
Clean, well-integrated frontend experiences supporting key user journeys
Increased team velocity through effective use of
AI-assisted development
High-quality, maintainable code with strong test coverage
Work Environment
Flexible / Remote
Minimal travel (0-10%)
Overview
We are seeking a
Senior Software Engineer
with a strong
backend focus (70%)
and solid
frontend capabilities (30%)
to help build and scale our Student Management platform.
This role is ideal for an engineer who excels in
API design, data architecture, and system scalability , while also contributing to
user-facing features
when needed. You will play a key role in driving
technical excellence , shaping architecture, and leveraging
AI-assisted development tools
to improve productivity, code quality, and delivery speed.
Key Responsibilities
Backend (Primary Focus - ~70%)
Design, build, and maintain scalable
RESTful APIs and event-driven services
using .NET / C#
Own backend architecture, including system design, scalability, reliability, and performance
Design and optimize
MSSQL / Azure SQL
databases (data modeling, indexing, performance tuning)
Implement secure, maintainable, and efficient data access patterns
Contribute to
event-driven and distributed system design
Build observability into services (logging, monitoring, alerting)
Frontend (Secondary Focus - ~30%)
Develop and enhance
responsive web UI components
using modern JavaScript frameworks (Svelte, React, or similar)
Integrate frontend applications with backend APIs
Ensure usability, performance, and accessibility standards are met
Cross-Functional / Leadership
Translate business requirements into scalable technical solutions
Lead design and implementation of complex features
Write and maintain
automated tests
(unit, integration, end-to-end)
Conduct code reviews and enforce engineering best practices
Mentor engineers and contribute to team growth
Collaborate with product, UX, and other stakeholders
AI-DrivenDevelopment Expectations
Actively leverage
AI-assisted development tools
(e.g., code generation, test generation, documentation support)
Use AI to accelerate
development workflows, debugging, and refactoring
Apply critical thinking to validate AI-generated outputs for quality and security
Identify opportunities to integrate
AI capabilities into the product
where applicable
Promote best practices for responsible and effective AI usage within the team
Required Qualifications
5+ years of software engineering experience (backend-leaning)
Strong expertise in
.NET / C# and Web API development
Deep experience with
MSSQL / Azure SQL
Solid experience with
JavaScript, HTML, CSS , and modern frontend frameworks
Strong understanding of
API design, microservices, and event-driven architecture
Experience with
cloud platforms
(Azure preferred, AWS acceptable)
Hands-on experience with
CI/CD pipelines
(GitHub Actions or similar)
Strong understanding of
software design patterns
(MVC, SOLID, DDD)
Experience working in
Agile environments
Preferred Qualifications
Experience with
Svelte
or modern frontend frameworks
Familiarity with
Terraform or infrastructure as code
Experience with
Docker and Kubernetes
Knowledge of
authentication/authorization
(Auth0, OAuth, SSO)
Experience with
Cypress
or similar testing tools
Familiarity with
GitHub Advanced Security / DevSecOps practices
Experience with
event streaming or messaging systems
What You'll Bring
Strong ownership mindset with the ability to lead complex initiatives
Balance of
deep backend expertise
and
pragmatic frontend skills
Curiosity and adaptability, especially in leveraging
AI to improve engineering outcomes
Ability to mentor others and elevate team standards
What Success Looks Like
Scalable, reliable backend services powering core platform workflows
Clean, well-integrated frontend experiences supporting key user journeys
Increased team velocity through effective use of
AI-assisted development
High-quality, maintainable code with strong test coverage
Work Environment
Flexible / Remote
Minimal travel (0-10%)