Sr./Lead Net Developer
3B Staffing LLC, Everett, MA, United States
Title: Sr./Lead Net Developer
Requirements:
Lead experience as a .Net Developer, .Net Core, APIs, SQL, some Angular/React skills
Position Description
The Senior .NET Developer - Modernization Lead is responsible for driving architectural evolution, technical modernization, and delivery resilience across enterprise C#/.NET applications supporting critical business operations. This role partners closely with Business Analysts, Product Owners, and technical leadership to design and implement secure, scalable, and maintainable solutions aligned with agency objectives. It provides senior-level technical direction, strengthens architectural standards, reduces legacy system risk, and improves system performance and reliability.
Duties/Responsibilities
Lead architectural design, development, and modernization efforts across C#/.NET applications.
Technical ownership for modernization initiatives (refactoring, cloud readiness, resiliency).
Translate complex business requirements into scalable technical solutions.
Establish architectural standards and coding guidelines.
Reduce technical debt through structured remediation.
Guide cross-team coordination.
Mentor developers.
Design secure RESTful APIs.
Lead root-cause analysis for production issues.
Partner with QA/DevOps on automation and stability.
Support operational readiness and monitoring.
Identify and mitigate architectural risks.
Minimum Qualifications
Bachelor's degree in CS, IS, Engineering, or related field.
7+ years of C#/.NET.
Experience leading architectural decisions.
Strong ASP.NET MVC/API background.
Advanced SQL Server performance skills.
Legacy modernization experience.
Secure RESTful API design.
Logging/monitoring/observability.
Knowledge of DI, middleware, async/await.
Frontend familiarity (Angular/React).
Mentoring experience.
Git/CI-CD proficiency.
Ability to deliver durable solutions.
Preferred Qualifications
• Public sector or matrixed experience.
• Experience with LLMs/automation.
• Cloud-native familiarity.
• SQL Server tuning expertise.
• Regulatory environment experience.
• Strong communication & adaptability.
• Advanced MS Office and Workday familiarity.
Special Requirements
• Proven modernization leadership (.NET Core/6+/Cloud).
• Ownership and accountability.
• Public-sector regulatory familiarity preferred.
• Technical design leadership.
• Detailed questionnaire responses required.
• 2-page resume max.
General Comments
RTR: BD-26-1036-EDU02-EDU02-125875
Project duration: Agreed upon start date through 06/30/2026 with annual renewal option
Remote; local candidates: Hybrid - 1 day/week in office, 4 days remote
Work Site Address: 135 Santilli Highway Everett, MA 02149
Include answers to these questions on the Candidate Bid Sheet:
1. Describe one legacy .NET system this candidate modernized.
a. Include: Original stack, Target architecture, Candidate's personal role, Major technical risks, Outcome
2. Provide an example where the candidate independently owned a complex deliverable or system.
a. Include: What they owned, How success was measured, How they handled blockers, Any failures/lessons
3. Describe how this candidate has supported or mentored junior developers.
a. Include: Methods, Examples, Impact
4. Provide the vendor's assessment of this candidate's fit for this role.
a. Include: Strengths, Development areas, Risks
5. Why are you confident in this match? What's your rate of confidence 0-100% and why?
Requirements:
Lead experience as a .Net Developer, .Net Core, APIs, SQL, some Angular/React skills
Position Description
The Senior .NET Developer - Modernization Lead is responsible for driving architectural evolution, technical modernization, and delivery resilience across enterprise C#/.NET applications supporting critical business operations. This role partners closely with Business Analysts, Product Owners, and technical leadership to design and implement secure, scalable, and maintainable solutions aligned with agency objectives. It provides senior-level technical direction, strengthens architectural standards, reduces legacy system risk, and improves system performance and reliability.
Duties/Responsibilities
Lead architectural design, development, and modernization efforts across C#/.NET applications.
Technical ownership for modernization initiatives (refactoring, cloud readiness, resiliency).
Translate complex business requirements into scalable technical solutions.
Establish architectural standards and coding guidelines.
Reduce technical debt through structured remediation.
Guide cross-team coordination.
Mentor developers.
Design secure RESTful APIs.
Lead root-cause analysis for production issues.
Partner with QA/DevOps on automation and stability.
Support operational readiness and monitoring.
Identify and mitigate architectural risks.
Minimum Qualifications
Bachelor's degree in CS, IS, Engineering, or related field.
7+ years of C#/.NET.
Experience leading architectural decisions.
Strong ASP.NET MVC/API background.
Advanced SQL Server performance skills.
Legacy modernization experience.
Secure RESTful API design.
Logging/monitoring/observability.
Knowledge of DI, middleware, async/await.
Frontend familiarity (Angular/React).
Mentoring experience.
Git/CI-CD proficiency.
Ability to deliver durable solutions.
Preferred Qualifications
• Public sector or matrixed experience.
• Experience with LLMs/automation.
• Cloud-native familiarity.
• SQL Server tuning expertise.
• Regulatory environment experience.
• Strong communication & adaptability.
• Advanced MS Office and Workday familiarity.
Special Requirements
• Proven modernization leadership (.NET Core/6+/Cloud).
• Ownership and accountability.
• Public-sector regulatory familiarity preferred.
• Technical design leadership.
• Detailed questionnaire responses required.
• 2-page resume max.
General Comments
RTR: BD-26-1036-EDU02-EDU02-125875
Project duration: Agreed upon start date through 06/30/2026 with annual renewal option
Remote; local candidates: Hybrid - 1 day/week in office, 4 days remote
Work Site Address: 135 Santilli Highway Everett, MA 02149
Include answers to these questions on the Candidate Bid Sheet:
1. Describe one legacy .NET system this candidate modernized.
a. Include: Original stack, Target architecture, Candidate's personal role, Major technical risks, Outcome
2. Provide an example where the candidate independently owned a complex deliverable or system.
a. Include: What they owned, How success was measured, How they handled blockers, Any failures/lessons
3. Describe how this candidate has supported or mentored junior developers.
a. Include: Methods, Examples, Impact
4. Provide the vendor's assessment of this candidate's fit for this role.
a. Include: Strengths, Development areas, Risks
5. Why are you confident in this match? What's your rate of confidence 0-100% and why?