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Full Stack Developer - TypeScript/Node/React - Java/C#
Kelly Services
Boston, MA
The selected engineer will play a key role in modernizing legacy Java/Spring and .NET applications by rebuilding them using modern technologies including Node.js, TypeScript, Angular, and…
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Software Developer - .NET/TypeScript/React/Angular
Kelly Services
Boston, MA
We are seeking a .NET Software Engineer to join a growing technology team focused on building modern, scalable web applications and enterprise solutions. This role will contribute across…
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C
Senior .NET Developer
Cognizant
Boston, MA
- $70,000 to $117,000 USD / year
As a Senior .NET Developer, you will make an impact by designing and developing scalable application components, backend services, and APIs that support complex business workflows. You will…
Added just now
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Senior .NET / SQL Developer
Cognizant
Boston, MA
- $64,025 to $94,500 USD / year
We are seeking a highly skilled Senior .NET / SQL Developer to join our team. In this role, you will be responsible for designing, developing, and supporting enterprise applications with a…
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Application Development and Support Engineer II
Ryder System
Boston, MA
This role requires hands-on development experience. Candidates must have experience coding in C#, and .NET. Applications without demonstrated development experience will not be considered
Added 17 mins ago
Principal Engineer
ServiceTitan, Inc.
Remote, United States
Deep expertise in at least one primary technology stack (e.g. C#/.NET, Java,C++ or equivalent), with the ability to quickly ramp up on and contribute to any technology in ServiceTitan's…
Added 26 mins ago
Senior Backend Engineer
Fresno Summit Advisors
Remote, United States
Added 41 mins ago
Dynamics 365 Customer Engineer 6586279
Accenture Flex LLC Company
Remote, United States
Added 50 mins ago
Manager, Software Development and Engineering
Charles Schwab Inc.
Southlake, TX
Schwab is recruiting a driven, results-oriented software developer who shares our passion for technology, innovation and excellence. Our main goal here at Schwab is to transform people’s…
Added 52 mins ago
Senior Full-Stack Software Engineer
KBR Wyle Services, LLC
Beavercreek Township, OH
…Vue, React, or Angular, integrated with Java/Spring Boot, C#/.NET, or comparable backend…
Added 1 hour ago
UG
Senior Software Engineer
UnitedHealth Group
Minnetonka, MN
- $91,700 to $163,700 USD / year
…assets. You will leverage backend technologies like C# and .NET Core, frontend frameworks like Angular, and database solutions including SQL Server and SSIS to deliver critical business…
Added 1 hour ago
UG
Software Engineer
UnitedHealth Group
Eden Prairie, MN
- $72,800 to $130,000 USD / year
…cloud-native architectures in Azure, modern frameworks like .NET and React JS, and advanced AI-assisted development tools, you will design and implement automation solutions that streamline…
Added 1 hour ago
MA
Senior Software Engineer – C#, .NET
Manufacturers and Traders Trust Co
Buffalo, NY
- $97,100 to $161,800 USD / year
Added 1 hour ago
Senior Mobile Engineer
JobNimbus
Lehi, UT
Collaborate across the full stack by designing, building, and maintaining backend microservices and APIs (cloud/AWS, .NET/C#) to power mobile AI features.
Added 1 hour ago
K
Senior Software Engineer - Backend
Kforce
St. Louis, MO
- $70 to $90 USD / hour
…development using the Microsoft technology stack, including C#, .NET, SQL Server, and…
Added 1 hour ago
Senior Level Full-Stack Software Engineer ($140K - $160K)
Young Basile
Remote, United States
…for design, coding, debugging, and productivity. As the sole developer, you will be the primary technical authority, responsible for everything from initial database schema design in MSSQL…
Added 1 hour ago
Senior Java-Springboot/Vue.js-PrimeVue Developer
Hudson Manpower
Cincinnati, OH
Experience with .NET environments and distributed systems.
Added 1 hour ago
IT Manager II
CorVel Brand
Portland, OR
Experience supporting .net applications and other Microsoft technologies
Added 2 hours ago
S
Web Developer II
Stratacor
Minneapolis, MN
- $83,000 to $104,000 USD / year
The Web Developer II will share responsibility for our cloud-based applications (primarily using Angular, Node.js and microservices). As a Web Developer II you will work closely with the VP…
Added 2 hours ago
Digital Delivery Manager
GSK
Philadelphia, PA
Added 2 hours ago
C
Software Engineer I (C#/.NET)
CoStar
Arlington
- $108,000 to $154,000 USD / year
…building software. We firmly believe that what separates a good developer from a great one is a deep understanding of the business that they are…
Added 2 hours ago
Mid-level Software Developer
ASRC Federal
Suffolk, VA
ASRC Federal is seeking a Mid-level Software Developer to support the Navy Circuit Management Office (NCMO) for Commander, Naval Information Forces in Suffolk, VA. The developer will build…
Added 2 hours ago
Junior Software Developer
ASRC Federal
Suffolk, VA
ASRC Federal is seeking a junior Software Developer to support the Navy Circuit Management Office (NCMO) for Commander, Naval Information Forces in Suffolk, VA. The developer will build and…
Added 2 hours ago
RU
Software Engineering Enablement Manager
RSM US LLP
Denver, CO
- $126,500 to $223,900 USD / year
…direction for reusable software libraries, engineering standards, developer enablement, and AI-assisted development. The manager collaborates with engineering, architecture, security,…
Added 2 hours ago
EU
Senior Full Stack Developer (.NET)
Experis USA
Austin, TX
- $65 to $69 USD / hour
Our client is seeking a Senior Full Stack Developer (.NET) to join their team. As a Senior Full Stack Developer (.NET), you will be part of the Retail Onboarding and Activation…

Kforce

Senior Software Engineer - Backend

St. Louis, MO, United States

$70 to $90 USD / hour

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Job details

Pay: $70 to $90 USD / hour
Experience: 7+ years of professional software development experience
Posting language: English
Posted: Oct 29, 2026

Original job description

Kforce's client is looking to add a Senior Software Engineer to their team. This role is a 6-month contract to hire in Saint Louis, MO.

Summary:

Are you a back-end engineer who loves solving complex technical challenges at scale? Our client is seeking a Senior Software Engineer to design, build, and optimize the core services that power a high-volume platform. This role is focused entirely on back-end development using the Microsoft technology stack, including C#, .NET, SQL Server, and Azure.

This is an opportunity to work on highly performant, rules-driven systems where scalability, reliability, and code quality are critical. You'll partner with Product, QA, and Engineering teams to develop solutions that support complex business logic while helping drive architectural decisions and technical best practice.

What You'll Do:

Design, develop, and maintain back-end services using C#, .NET, ASP.NET Core, and Azure
Build and optimize high-performance APIs and services focused on scalability and reliability
Profile and tune application performance, including latency, memory usage, database efficiency, and throughput
Design cloud-native solutions leveraging Azure services, messaging, caching, and automation tools
Translate complex business requirements into clean, maintainable code and scalable architectures
Participate in code reviews, technical design discussions, and architecture decisions
Troubleshoot and resolve complex production issues in large-scale systems
Mentor other engineers and contribute to raising technical standards across the team
Leverage AI-assisted development tools to improve efficiency, quality, and delivery
Bachelor's degree in Computer Science, Software Engineering, or related field (or equivalent experience)
7+ years of professional software development experience
Experience optimizing application performance, identifying bottlenecks, and improving scalability
Advanced SQL Server experience, including query optimization and performance tuning
Experience developing and supporting cloud-based applications in Microsoft Azure
Strong expertise with C#, .NET, ASP.NET Core, and RESTful API development
Deep understanding of software design patterns, object-oriented design, and domain modeling
Strong understanding of automated testing, CI/CD pipelines, and DevOps practices

Preferred Qualifications:

Experience building high-throughput, low-latency applications
Experience with Infrastructure as Code and containerized deployments
Knowledge of distributed systems, caching strategies, messaging platforms, and event-driven architectures
Exposure to AI-assisted software development tools
Background in financial services or other regulated industries

Technology Stack:

C#
.NET/ASP.NET Core
Entity Framework Core
SQL Server
Microsoft Azure
Azure DevOps
REST APIs
CI/CD Automation

The pay range is the lowest to highest compensation we reasonably in good faith believe we would pay at posting for this role. We may ultimately pay more or less than this range. Employee pay is based on factors like relevant education, qualifications, certifications, experience, skills, seniority, location, performance, union contract and business needs. This range may be modified in the future.

We offer comprehensive benefits including medical/dental/vision insurance, HSA, FSA, 401(k), and life, disability & ADD insurance to eligible employees. Salaried personnel receive paid time off. Hourly employees are not eligible for paid time off unless required by law. Hourly employees on a Service Contract Act project are eligible for paid sick leave.

Note: Pay is not considered compensation until it is earned, vested and determinable. The amount and availability of any compensation remains in Kforce's sole discretion unless and until paid and may be modified in its discretion consistent with the law.

This job is not eligible for bonuses, incentives or commissions.

Kforce is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status.

By clicking “Apply Today” you agree to receive calls, AI-generated calls, text messages or emails from Kforce and its affiliates, and service providers. Note that if you choose to communicate with Kforce via text messaging the frequency may vary, and message and data rates may apply. Carriers are not liable for delayed or undelivered messages. You will always have the right to cease communicating via text by using key words such as STOP.

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More about this job

Skills

Back-end development
C#
.NET
Microsoft SQL Server
Microsoft Azure
Microsoft ASP.NET
Troubleshoot
Computer science
Software development
RESTful API
Test automation
CI/CD
Infrastructure as code
Software development tools
DevOps
API development

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