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Lead C#/.NET Engineer

Dew Softech Inc

New Jersey • Today

Easy Apply

Full-time, Part-time, Third Party, Contract

Lead/Principal C#/.NET Engineer Must be Local to NJ

Zenosys

Hybrid in Hamilton Township, New Jersey • Today

Easy Apply

Contract, Third Party

Depends on Experience

C#/.NET Engineer

CAI

New Jersey • Today

Full-time

USD 58.00 - 62.00 per hour

Principal C#/.NET Engineer – Mainframe Modernization & EF Core

Sunrise Systems, Inc.

Hybrid in Trenton, New Jersey • Today

Easy Apply

Contract

56 - 60

Principal C#/.NET Engineer – Mainframe Modernization & EF Core

Sunrise Systems, Inc.

Hybrid in Trenton, New Jersey • Today

Easy Apply

Contract

56 - 60

Senior .NET Engineer Healthcare Platform (C#/.NET, Node.js/TypeScript, Azure/AWS)

NDAPARTNERS INC

Remote • Today

Easy Apply

Contract, Third Party

Depends on Experience

Lead Software Engineer - Azure & .NET

Randstad Digital

Remote or Omaha, Nebraska • Today

Contract

USD70 - USD100

C#.NET, React, Java Full stack Lead Software Engineer

JPMorgan Chase & Co.

Jersey City, New Jersey • Today

Full-time

USD 156,750.00 - 215,000.00 per year

Sr. C# .Net Full Stack AWS Cloud Developer (Newark-NJ-Only Locals)

SmartIMS Inc.

Newark, New Jersey • Today

Easy Apply

Contract, Third Party

Depends on Experience

Test Engineer/Test Automation (C++, C#, LabView, .NET, Hardware/Software Troubleshooting)

Tellus Solutions

Holmdel, New Jersey • 8d ago

Easy Apply

Contract

$68.18

Senior .NET Full Stack Lead - US REMOTE

NTT DATA Americas, Inc

Remote • 16d ago

Easy Apply

Contract, Third Party

$66

Senior Software Engineer - .NET, C#, WPF

Motion Recruitment Partners, LLC

Remote • Today

Easy Apply

Full-time

$115000 - $130000

Stock Loan Senior Developer C#/.NET

ENXRA AI INC

Remote • Today

Easy Apply

Full-time

Depends on Experience

.NET/C# web developer - Local to CA

Visionsoft International

Remote • 9d ago

Easy Apply

Full-time

Depends on Experience

.Net Technical Lead

Global Alliant Inc

Remote • 2d ago

Easy Apply

Full-time

$120,000 - $140,000

Sr .NET technical lead

Global Alliant Inc

Remote • 10d ago

Easy Apply

Full-time

130000 - 140000

.Net Lead Developer (Inperson interview at Newark, NJ) (W2-Contract)

HPTech Inc.

Hybrid in Newark, New Jersey • Today

Easy Apply

Contract

Depends on Experience

Lead .NET Engineer with AI tools

EPAM Systems

Remote • Today

Full-time

Lead Full-Stack .NET / Angular Engineer

Stellar IT Solutions

Remote or St. Louis, Missouri • Today

Easy Apply

Full-time, Part-time, Third Party, Contract

USD 68-70

C#, Python, Rust, SQL Lead Software Engineer

JPMorgan Chase & Co.

Jersey City, New Jersey • Today

Full-time

USD 156,750.00 - 215,000.00 per year

Healthcare .Net Tech Lead Engineer at Remote

PropelSys Technologies LLC.

Remote or Texas • Today

Easy Apply

Third Party, Contract

.Net Lead Developer

SmartIMS Inc.

Hybrid in Pennington, New Jersey • Today

Easy Apply

Third Party, Contract

Depends on Experience

C#/Duck Creek Developer (Field Engineer)

Precision System Design Inc.

Remote or Hybrid • Today

Easy Apply

Contract

DOE

Senior .NET Full Stack Lead - US REMOTE

NTT DATA, Inc.

Remote or Alpharetta, Georgia • Today

Full-time

Senior SDET – Trading Systems | C#/.NET | Python | Backend/API Testing

QuellSoft Inc.

Hybrid in Jersey City, New Jersey • 4d ago

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Contract, Third Party

Platform (Lead) Consultant - .Net, Azure, API

Allstate Insurance Company

Remote • Today

Full-time

USD 120,000.00 - 193,725.00 per year

.Net Lead

NTT DATA, Inc.

Remote or New Jersey • Today

Full-time

USD 80.00 - 90.00 per hour

Software Engineer III: Backend C#

Jack Henry & Associates

Remote • Today

Full-time

Sr. Web Application Developer

System One

Remote • Yesterday

Easy Apply

Contract

$57.65

TSD Application Developer - Lead (Senior/Specialist) | Two Positions

Washington State Department of Transportation

Remote or Lacey, Washington • Today

Full-time

USD 99,300.00 - 133,608.00 per year

Job Details

Skills

Typescript
Angular 17+
.NET 6/7/8/10
AWS
Git
PostgreSQL

Summary

Sr/Lead C#/.NET Engineer

Location: Hamilton, NJ (Hybrid)

Position Type: Contract

In Person Only

Lead/Principal C#/.NET Engineer with expert-level Entity Framework Core experience to lead the modernization of a mission-critical legacy benefits system hosted on AWS Cloud.

Position Summary:

We are modernizing a large, mission-critical Honeywell Bull mainframe benefits system (FAMIS) converting ~1.5M lines of COBOL and ~160K lines of JCL to C#/.NET, migrating an IDS-II hierarchical database to PostgreSQL, and deploying on AWS. Converted code is delivered by an automated modernization vendor in an "as-is" state. This Lead/Principal role owns the refactoring of that converted code into clean, maintainable, high-performance, production-grade C#/.NET, defines the data-access architecture using Entity Framework Core against PostgreSQL, sets engineering standards for the team, and safeguards functional equivalence to the legacy system. This is a benefits system serving NJ families correctness, performance within the nightly batch window, and maintainability are paramount.

Required skills:

C# Programming Experience Required 10 Years
.NET Core / .NET 6/7/8/10 Experience Required 10 Years
.NET REST/WEB API Development Experience Required 5 Years
Entity Framework Core and LINQ and async/await patterns Experince Required 10 Years
Solid software design: SOLID, design patterns, domain modeling, layered/clean architecture, dependency injection Required 5 Years
Angular 17+, Typescript and Node.js experience Required 5 Years
Strong relational database skills; PostgreSQL strongly preferred (Oracle/SQL Server acceptable) schema design, indexing, query tuning, stored proc Required 5 Years
unit/integration/regression testing frameworks; TDD/mocking Required 5 Years
Git and static code analysis (SonarQube) Required 5 Years
Docker containerization and CI/CD pipeline experience (AWS CODEPIPELINE OR GitHub Actions) Required 3 Years
AWS cloud native applications (S3, SNS, SQS, ECS, RDS, EC2, Lambda) Required 3 Years

Responsibilities:

C# / .NET Engineering
Refactor machine-converted, COBOL-derived C# into idiomatic, maintainable .NET meaningful naming, proper OO/domain design, separation of concerns, dependency injection
Work in .NET (Core) / .NET (latest version); apply modern C# language features (LINQ, async/await, records, pattern matching, nullable reference types, generics)
Design and implement service layers, domain models, and APIs (ASP.NET Core Web API) that back the Angular UI
Refactor legacy batch/procedural logic (converted from COBOL/JCL) into maintainable, testable .NET; handle exact decimal/financial arithmetic (decimal, rounding rules) to preserve benefit-calculation correctness
Optimize performance to meet the nightly batch window (profiling, memory management, async I/O, parallelism where safe)
Entity Framework / Data Layer
Own the data-access architecture using Entity Framework Core against PostgreSQL (Npgsql provider)
Refactor the auto-generated/converted data-access layer into a clean, performant EF Core model
Design entity models, DbContext configuration, Fluent API mappings, relationships, keys, and indexes reflecting the IDS-II PostgreSQL schema (168 tables, 4,024+ fields)
Optimize EF Core queries (eager/lazy/explicit loading, projection, AsNoTracking, compiled queries, batching) to avoid N+1 and meet performance SLAs on high-volume batch operations
Manage EF Core migrations, concurrency handling, transactions, and connection resiliency
Map legacy data types and semantics correctly (packed decimals, fixed-width, EBCDIC-origin data, condition codes) to PostgreSQL/EF types without behavioral drift
Contribute to the COBOL-field PostgreSQL-column business-term data dictionary
Technical Leadership
Define and enforce C#/.NET coding standards, architecture patterns, and refactoring guidelines for the engineering team
Serve as senior technical authority on the converted codebase; make cross-cutting design decisions
Mentor mid/junior C# developers; perform code reviews; drive engineering quality
Partner with the Technical Manager/Architect on target architecture and the refactoring strategy
Quality, Testing & Delivery
Ensure functional equivalence: build unit and regression tests (xUnit/NUnit, Moq) to validate refactored code against the legacy baseline; fix FET-surfaced defects
Integrate with CI/CD (AWS CodeBuild/CodePipeline), enforce quality/security gates (SonarQube, static analysis, secure coding/OWASP)
Collaborate with FAMIS SMEs to preserve business logic (eligibility, benefit calculation, payments, EBT)
Deliver incrementally within Scrum; document design and decisions
Required Qualifications
12-15 years of professional C#/.NET software engineering, including senior/lead responsibilities
Deep expertise in C# and the .NET platform (.NET Framework and .NET Core / .NET 6/8+), including async programming, memory/performance optimization, and modern language features
Expert-level Entity Framework / EF Core: entity modeling, Fluent API, migrations, query optimization, transactions, concurrency, provider-specific behavior
Strong relational database skills; PostgreSQL strongly preferred (Oracle/SQL Server acceptable) schema design, indexing, query tuning, stored procedures
ASP.NET Core Web API design (REST) for front-end integration
Solid software design: SOLID, design patterns, domain modeling, layered/clean architecture, dependency injection
Testing discipline: unit/integration/regression testing frameworks; TDD/mocking
Git, CI/CD, and static code analysis (SonarQube)
Proven ability to read, reason about, and safely refactor large, unfamiliar codebases
Exceptional attention to correctness financial/benefit calculation accuracy
Preferred / Nice to Have
Legacy modernization experience COBOL-to-C#/Java conversion, mainframe migration, or automated-transformation tooling
Understanding of mainframe concepts (COBOL, JCL, batch processing, hierarchical/CODASYL databases like IDS-II/IMS) to reason about source behavior
High-volume batch processing performance tuning
AWS experience (ECS/EKS, Lambda, RDS for PostgreSQL, S3, CloudWatch, IaC/CloudFormation)
Experience integrating with enterprise job schedulers (Stonebranch, Control-M, CA7)
Government / benefits / healthcare or other regulated, high-correctness domains
Npgsql specifics, EF Core performance internals, or ORM migration experience
Success in the First 90 Days
Establish the C#/.NET and EF Core standards, patterns, and reference implementation the team will follow
Refactor a representative set of converted programs (including a benefit-calculation and a batch program) to clean, tested, performant C# validated against the legacy baseline
Define the EF Core data-access approach against PostgreSQL, including query-performance guardrails for batch workloads
Mentor the team and set the code-review/quality bar

Employers have access to artificial intelligence language tools (“AI”) that help generate and enhance job descriptions and AI may have been used to create this description. The position description has been reviewed for accuracy and Dice believes it to correctly reflect the job opportunity.

Dice Id: 10243845
Position Id: DEW - 2886-2886-1791557239
Posted 3 hours ago

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Title: Sr. .Net Developer Location: Hamilton, NJ Duration: 12+ Months Description: C# / .NET Engineering Refactor machine-converted, COBOL-derived C# into idiomatic, maintainable .NET meaningful naming, proper OO/domain design, separation of concerns, dependency injection Work in.NET (Core) / .NET (latest version); apply modern C# language features (LINQ, async/await, records, pattern matching, nullable reference types, generics)Design and implement service layers, domain models, and APIs (AS

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Principal or Lead C#/.NET Engineer | Applicant Must Be Currently Local to Hamilton, NJ | Relocation Not Allowed

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NOTE: APPLICANT MUST BE ON OUR W2 OR 1099. C2C IS ALLOWED IF OWN CORPORATION ONLY. NOT ACCEPTING SUB-VENDORS. APPLICANT MUST BE CURRENTLY LOCAL TO HAMILTON, NJ AT THE TIME OF SUBMISSION. RELOCATION IS NOT ALLOWED. Role: Principal or Lead C#/.NET Engineer Location: Hamilton, NJ Hybrid Duration: 12 Months Interview: In-Person Work Arrangement: Hybrid - Will start 100% on site for 30 days & move to hybrid 3 days onsite 2 days remote Short Description: Lead/Principal C#/.NET Engineer with expert

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Job Details

Skills

Typescript
Angular 17+
.NET 6/7/8/10
AWS
Git
PostgreSQL

Summary

Sr/Lead C#/.NET Engineer

Location: Hamilton, NJ (Hybrid)

Position Type: Contract

In Person Only

Lead/Principal C#/.NET Engineer with expert-level Entity Framework Core experience to lead the modernization of a mission-critical legacy benefits system hosted on AWS Cloud.

Position Summary:

Required skills:

C# Programming Experience Required 10 Years
.NET Core / .NET 6/7/8/10 Experience Required 10 Years
.NET REST/WEB API Development Experience Required 5 Years
Entity Framework Core and LINQ and async/await patterns Experince Required 10 Years
Solid software design: SOLID, design patterns, domain modeling, layered/clean architecture, dependency injection Required 5 Years
Angular 17+, Typescript and Node.js experience Required 5 Years
Strong relational database skills; PostgreSQL strongly preferred (Oracle/SQL Server acceptable) schema design, indexing, query tuning, stored proc Required 5 Years
unit/integration/regression testing frameworks; TDD/mocking Required 5 Years
Git and static code analysis (SonarQube) Required 5 Years
Docker containerization and CI/CD pipeline experience (AWS CODEPIPELINE OR GitHub Actions) Required 3 Years
AWS cloud native applications (S3, SNS, SQS, ECS, RDS, EC2, Lambda) Required 3 Years

Responsibilities:

C# / .NET Engineering
Refactor machine-converted, COBOL-derived C# into idiomatic, maintainable .NET meaningful naming, proper OO/domain design, separation of concerns, dependency injection
Work in .NET (Core) / .NET (latest version); apply modern C# language features (LINQ, async/await, records, pattern matching, nullable reference types, generics)
Design and implement service layers, domain models, and APIs (ASP.NET Core Web API) that back the Angular UI
Refactor legacy batch/procedural logic (converted from COBOL/JCL) into maintainable, testable .NET; handle exact decimal/financial arithmetic (decimal, rounding rules) to preserve benefit-calculation correctness
Optimize performance to meet the nightly batch window (profiling, memory management, async I/O, parallelism where safe)
Entity Framework / Data Layer
Own the data-access architecture using Entity Framework Core against PostgreSQL (Npgsql provider)
Refactor the auto-generated/converted data-access layer into a clean, performant EF Core model
Design entity models, DbContext configuration, Fluent API mappings, relationships, keys, and indexes reflecting the IDS-II PostgreSQL schema (168 tables, 4,024+ fields)
Optimize EF Core queries (eager/lazy/explicit loading, projection, AsNoTracking, compiled queries, batching) to avoid N+1 and meet performance SLAs on high-volume batch operations
Manage EF Core migrations, concurrency handling, transactions, and connection resiliency
Map legacy data types and semantics correctly (packed decimals, fixed-width, EBCDIC-origin data, condition codes) to PostgreSQL/EF types without behavioral drift
Contribute to the COBOL-field PostgreSQL-column business-term data dictionary
Technical Leadership
Define and enforce C#/.NET coding standards, architecture patterns, and refactoring guidelines for the engineering team
Serve as senior technical authority on the converted codebase; make cross-cutting design decisions
Mentor mid/junior C# developers; perform code reviews; drive engineering quality
Partner with the Technical Manager/Architect on target architecture and the refactoring strategy
Quality, Testing & Delivery
Ensure functional equivalence: build unit and regression tests (xUnit/NUnit, Moq) to validate refactored code against the legacy baseline; fix FET-surfaced defects
Integrate with CI/CD (AWS CodeBuild/CodePipeline), enforce quality/security gates (SonarQube, static analysis, secure coding/OWASP)
Collaborate with FAMIS SMEs to preserve business logic (eligibility, benefit calculation, payments, EBT)
Deliver incrementally within Scrum; document design and decisions
Required Qualifications
12-15 years of professional C#/.NET software engineering, including senior/lead responsibilities
Deep expertise in C# and the .NET platform (.NET Framework and .NET Core / .NET 6/8+), including async programming, memory/performance optimization, and modern language features
Expert-level Entity Framework / EF Core: entity modeling, Fluent API, migrations, query optimization, transactions, concurrency, provider-specific behavior
Strong relational database skills; PostgreSQL strongly preferred (Oracle/SQL Server acceptable) schema design, indexing, query tuning, stored procedures
ASP.NET Core Web API design (REST) for front-end integration
Solid software design: SOLID, design patterns, domain modeling, layered/clean architecture, dependency injection
Testing discipline: unit/integration/regression testing frameworks; TDD/mocking
Git, CI/CD, and static code analysis (SonarQube)
Proven ability to read, reason about, and safely refactor large, unfamiliar codebases
Exceptional attention to correctness financial/benefit calculation accuracy
Preferred / Nice to Have
Legacy modernization experience COBOL-to-C#/Java conversion, mainframe migration, or automated-transformation tooling
Understanding of mainframe concepts (COBOL, JCL, batch processing, hierarchical/CODASYL databases like IDS-II/IMS) to reason about source behavior
High-volume batch processing performance tuning
AWS experience (ECS/EKS, Lambda, RDS for PostgreSQL, S3, CloudWatch, IaC/CloudFormation)
Experience integrating with enterprise job schedulers (Stonebranch, Control-M, CA7)
Government / benefits / healthcare or other regulated, high-correctness domains
Npgsql specifics, EF Core performance internals, or ORM migration experience
Success in the First 90 Days
Establish the C#/.NET and EF Core standards, patterns, and reference implementation the team will follow
Refactor a representative set of converted programs (including a benefit-calculation and a batch program) to clean, tested, performant C# validated against the legacy baseline
Define the EF Core data-access approach against PostgreSQL, including query-performance guardrails for batch workloads
Mentor the team and set the code-review/quality bar

Dice Id: 10243845
Position Id: DEW - 2886-2886-1791557239
Posted 3 hours ago

Fitment

Dice Job Match Score™

To see how well you match this job, please log in or create an account.

Once logged in, be sure to complete your profile to get the most accurate match score.

Create job alert

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