Jobs in the United States

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Added 9 days ago
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Azure Senior AppDev Engineer
Ascend Technologies
Remote, United States
- $140,000 USD / year
The Senior AppDev Engineer is a highly autonomous engineering contributor responsible for delivering complex application features and modernization components across the client platform.…
Added 9 days ago
Full Stack Engineer
Robert Half
Jacksonville, FL
We are seeking a Senior Full Stack Engineer to lead the design and development of modern web applications. This role will work across the full technology stack, building scalable front-end…
Added 9 days ago
Senior Database Developer (3292 RBC)
INSPYR Solutions
Davenport, IA
We are seeking an experienced Senior Database Developer for a temporary engagement supporting a critical legacy system modernization initiative. This role will focus on analyzing existing…
Added 9 days ago
Tester (Remote)
GovCIO
Madison, WI
Check data in PostgreSQL and other data stores with SQL. Check JSON, XML, and file content with scripts.
Added 9 days ago
CS
Customer Success Lead Data Scientist - Energy Industry Expert
Cloud Software Group, Inc.
Denver, CO
- $128,001 to $192,001 USD / year
…integration e.g. Data Virtualization is a plus. Knowledge of SQL, .Net, Java, IronPython, Javascript, C++ and knowledge of Generative AI is a…
Added 9 days ago
Site Reliability Engineer Team Lead
SilverTech, Inc.
Bedford, NH
Manage Azure services (App Services, Azure SQL, Key Vaults, Application Insights) and legacy AWS infrastructure (EC2, RDS, S3).
Added 9 days ago
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Senior Software Engineer
Walmart
BELLEVUE, WA
- $143,104 to $216,000 USD / year
…C#, Scale, React, JavaScript, Typescript, Swift, Kotlin, Go, SQL or related technologies. Develop and maintain operational dashboards to detect and investigate the system issues to minimize…
Added 9 days ago
Senior QA Automation / SDET
Marvik
Remote, United States
Modern, multi-cloud stack: MongoDB + SQL, Azure + AWS
Added 9 days ago
Senior Developer
Insight Global
Fort Mill, SC
The ideal candidate is a senior developer with strong SQL Server and C# experience who can understand complex application behavior, analyze datasets, trace stored-procedure logic, and…
Added 9 days ago
.NET Engineer
Publicis Groupe Holdings B.V
Chicago, IL
As a Senior Associate Technology L2 specializing in .NET Microservices, you will be responsible for designing, developing, and maintaining scalable, high-performance microservices-based…
Added 9 days ago
BH
Senior Full Stack Developer
Bright Horizons
Newton, MA
- $115,000 to $151,000 USD / year
Experience in back-end development using .NET core/ .NET, C#, Unit test, REST API, SQL Server.
Added 9 days ago
MC
Information Technology Senior Software Developer (Communications, Information & Technology)
Miami-Dade County
FL
- $96,561.5 to $161,053.46 USD / year
Preferences: C#; ASP.NET; ADO.NET; EF; .NET framework V4 and above; .NET Core; HTML5/CSS and responsive UI; Blazor; JavaScript/Typescript and/or Modern UI frameworks, MVC architecture; Web…
Added 9 days ago
Senior Backend Engineer
Fresno Summit Advisors
Remote, United States
We're looking for a Senior Backend Engineer (Java/Spring) to help design, build, and evolve our ecommerce platform. You'll work closely with Product and other engineers to solve complex…
Added 9 days ago
UG
Senior Software Engineer
UnitedHealth Group
Minnetonka, MN
- $91,700 to $163,700 USD / year
Join our dynamic and innovative technology team as a Senior Software Engineer. In this high-impact role, you will be part of a collaborative squad focused on building, maintaining, and…
Added 9 days ago
MA
Senior Software Engineer – C#, .NET
Manufacturers and Traders Trust Co
Buffalo, NY
- $97,100 to $161,800 USD / year
Added 9 days ago
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Senior Software Engineer - Backend
Kforce
St. Louis, MO
- $70 to $90 USD / hour
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…
Added 9 days 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…
Added 9 days ago
Financial Technical Analyst
Publicis Groupe Holdings B.V
Boston, MA
As a Senior Associate Technology L1, you will be responsible for designing, developing, and implementing .NET-based solutions that drive digital transformation for our clients. You will…
Added 9 days ago
Senior .NET Developer
Installed Building Products
Columbus, OH
Added 9 days ago
Associate Systems Engineer
The Scoular Company
Omaha, NE
…platforms. Working as part of an Agile Integration Team alongside senior integration engineers that build and maintain integrations using Azure Integration Services (Logic Apps, Service…
Added 9 days ago
Senior Power Apps/Power BI Developer
i4DM
Remote, United States
Our team is seeking a Senior Power Apps/Power BI Developer to join our fast-growing IT-project based consulting business. We need a team member who is ready to design, architect, and lead…
Added 9 days ago
UG
Senior Software Engineer
UnitedHealth Group
Minnetonka, MN
- $91,700 to $163,700 USD / year
Join our dynamic and innovative technology team as a Senior Software Engineer. In this high-impact role, you will be part of a collaborative squad focused on building, maintaining, and…
Added 9 days ago
Microsoft Full Stack .NET C# Web Developer
Chromalloy
Phoenix, AZ · Carson City, NV · San Antonio, TX · Tampa, FL · Palm Beach Gardens, FL · Fort Lauderdale, FL · Newnan, GA
We’re looking for a Senior Microsoft Full Stack .NET C# Web Developer to build, modernize, and support enterprise applications that help keep our manufacturing operations running. You’ll…
Added 10 days ago
Software Engineer Intern (C#)
Garda Capital Partners
Wayzata, MN
gRPC services on modern .NET, backed by SQL databases
Added 10 days ago
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Lead Application Developer
ADP
Florham Park, NJ
- $93,400 to $230,000 USD / year
To thrive in this development career, you'll need to be an expert in C#, .NET and SQL Server development and have a firm grasp on React. You'll need to be familiar with web services,…

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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