Application Developer III

InstantServe LLC

Job Title: Application Developer III (C# / Azure)

Location: Jackson, Mississippi (Onsite)
Duration: 12-Month Contract (May 2026 - May 2027)
Schedule: Monday to Friday, 8:00 AM - 5:00 PM

Job Summary

We are seeking an experienced Application Developer III with strong expertise in C#, Microsoft Azure, and testing practices . This role involves designing, developing, and supporting enterprise applications while ensuring high performance, reliability, and quality through robust testing and DevOps practices. The ideal candidate will have a balanced background in development, testing, and deployment processes.

Key Responsibilities

Design, develop, and maintain applications using C# and .NET technologies
Work within Microsoft Azure to build and deploy scalable applications
Develop and integrate APIs using JSON, YAML, and JavaScript
Implement and manage CI/CD pipelines using Azure DevOps
Perform unit, integration, and performance testing
Create and execute test cases and support user acceptance testing
Work with SQL Server for data management, queries, and optimization
Support data modeling, schema design, and data migration activities
Use Git for version control and follow best coding practices
Collaborate with cross-functional teams in an Agile environment

Required Qualifications

Minimum 7 years of experience in C# and .NET development
Strong experience with Microsoft Azure
Proficiency in JavaScript, JSON, and YAML
Experience with SQL Server and database development
Hands-on experience with CI/CD pipelines and Azure DevOps
Strong knowledge of version control tools such as Git
Experience with unit testing, integration testing, and performance testing
Experience in test case design and user acceptance testing support
Strong understanding of data modeling and API development

Preferred Qualifications

Experience with Adabas database
Exposure to z/OS environments
Experience working with virtual machines and enterprise server environments
Previous experience in government or public sector projects

Additional Information

Onsite role; remote work is not permitted
Standard background check required
No travel required
Occasional overtime may be required

Apply

Vacancy posted 4 days ago

Similar jobs that could be interesting for youBased on the Application Developer III in Jackson, MS vacancy

Cloud Engineer III
$100k - $115k
...: Job Title: Cloud Services Engineer III As a Cloud and Hosting Services Analyst... ...for our customers? Understanding of applications development environment, database, data... ...Datalake, etc)? Experience managing or developing automation with object-oriented programming...
Suggested
Full time
Work experience placement
Remote work
Pearson
Jackson, MS
1 day ago
Software Engineer III
$118k - $178k
...technical solutions, build rich data-driven user experiences, and develop shared frontend and data-layer patterns used to fetch,... ...to create a welcoming and diverse environment. All qualified applicants will receive consideration for employment without regard to race...
Suggested
Work experience placement
Local area
Indeed
Jackson, MS
2 days ago
.NET Full Stack Developer
...As a .NET Developer you will be responsible for creation and implementation innovative web application for both internal as well as client facing applications. You will also ensure support in analysis and designing during all phases of software production, including suggesting...
Suggested
Kaav Inc.
Jackson, MS
1 day ago
Applications Engineer
$70k - $94k
...Applications Engineer Apply Now Start applying with LinkedIn Please wait... Job Description Are you passionate about matching... ...scope of proposed high-purity water treatment solutions. Develop conceptual system designs and perform preliminary engineering...
Suggested
Full time
Contract work
Remote work
Work from home
Worldwide
Visa sponsorship
Work visa
Flexible hours
Grundfos
Jackson, MS
4 days ago
Salesforce Developer
$109.1k - $136.37k
...than just a job, you'll find a career built on trust, teamwork, and opportunity at OD. The Salesforce Developer II will design world-class Salesforce applications for our evolving CRM requirements. The Salesforce Developer II position will be responsible for...
Suggested
Full time
Temporary work
Work experience placement
Local area
Immediate start
Shift work
Day shift
Old Dominion Freight
Richland, MS
3 days ago
ServiceNow ITSM Developer
...successful. We are seeking a highly experienced ServiceNow ITSM Developer to support the design, development, and operational excellence... ...Red River is an equal opportunity employer. All qualified applicants will receive consideration for employment. Discrimination or...
Full time
Remote work
Red River
Jackson, MS
2 days ago
Embedded Software Engineer
$78.4k - $130k
...Duties and Responsibilities: Software Design & Development • Develop, code, test, and debug new embedded software or enhancements... ...guidance to design and modify moderately complex software applications, tools, and utilities. • Apply software design theories, engineering...
Local area
Remote work
ITW
Jackson, MS
19 hours ago
Lead Network Engineer
$131.3k - $237.35k
...Boards (ERB). ~ Operations & Escalation Support: Provide Tier-III escalation support to the Network Operations Center (NOC) and... ...abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law. About Leidos...
Contract work
Work experience placement
Local area
Immediate start
Night shift
Leidos
Pearl, MS
19 hours ago
Senior Software Engineer - IMS TM/DB Application Programmer
$120.5k - $162.68k
...expertise in IBM IMS™ Transaction Manager (TM) and Database (DB) application programming to drive the evolution of our IMS compatible... ...complex system-level components. Direct hands-on experience developing or maintaining IMS TM and DB applications on IBM z/OS (essential...
Full time
Remote work
Worldwide
Flexible hours
Rocket Software
Jackson, MS
1 day ago
Application Security Engineer
$99k - $225k
...Job Number: R0247902 Application Security Engineer The Opportunity: Everyone is trying to "harness the cloud", but not everyone knows how. As a cloud computing infrastructure architect, you know how to take advantage of cloud capabilities. On our team of experienced...
Full time
Contract work
Part time
Work at office
Local area
Remote work
Booz Allen Hamilton
Pearl, MS
19 hours ago
.Net Full Stack Developer
Job Title: .Net Full Stack Developer (Contract) - Job#5999 Location: 100% Onsite Jackson, Mississippi Job Description Our Department... ...often requiring the development of new or improved applications, processes or techniques. Accountable for application design...
Contract work
Delphi-US, LLC - Peacemakers in the Talent War
Jackson, MS
1 day ago
.NET Core Developer
...Job Title: .NET Core Developer Location: Jackson, MS Position Type: Contract (3-5 Months) Job Description: We are seeking... ...candidate will be instrumental in our project to redesign a legacy application from FoxPro to .NET Core. This role involves comprehensive...
Contract work
Temporary work
CapLeo Global
Jackson, MS
4 days ago
Mainframe System Programmer
...operating system problem determination and resolution support utility programs. Should have experience performing system and application problem determination and resolution. Must have experience using SMP/E to install operating systems and program products and...
Contract work
Work experience placement
Saxon Global
Jackson, MS
2 days ago
Systems Programmer
$127.1k - $198.58k
...and technology modernization initiatives. The role involves developing, implementing, and maintaining software solutions, algorithms... ...Familiarity with? data engineering, machine learning, or AI/ML applications ?in aviation or operational contexts. Experience...
Permanent employment
Full time
Contract work
Part time
Local area
Remote work
Noblis
Jackson, MS
3 days ago
.Net Developer
...variety of technical work in the development of new software applications including analysis, design, coding, testing, debugging, and documenting... ...the customer is affected. Acts as a resource for Level I developers for basic guidance. Perform additional duties as assigned....
Software Technology Inc
Jackson, MS
1 day ago
Senior Systems Software Engineer
$102.3k - $209.5k
...Responsibilities Systems Software Development: Design, develop, and maintain standard and non-standard system software modules... ...Troubleshoots and resolves moderately complex issues related to application programming interface (API) functionality and integration....
Temporary work
Immediate start
Flexible hours
Shift work
Oracle
Jackson, MS
19 hours ago
Senior Software Engineer (Remote)
$167.7k - $245.2k
The application window is expected to close on: 11/29/2026This is a fully remote role and can be based anywhere in the United States.Meet... ...senior engineers, architects, and cross-functional teams to develop system-level security capabilities while contributing to a cross...
Full time
Temporary work
Local area
Remote work
Flexible hours
CISCO Systems
Jackson, MS
17 hours ago
Distinguished Software Engineer (Remote)
$293.9k - $406.8k
The application window is expected to close on: 10/19/2026Job posting may be removed earlier if the position is filled or if a sufficient... ..., and long-term scalability!Your ImpactInnovate, develop, and drive industry-leading software, hardware, and technology...
Full time
Temporary work
Local area
Remote work
Flexible hours
CISCO Systems
Jackson, MS
19 hours ago
Java Full Stack Developer
...Hiring: W2 Candidates Only Job Description: We are seeking a Senior Java Full Stack Developer to develop scalable enterprise applications across both backend and frontend technologies. The ideal candidate will have strong experience with Java, Spring Boot, React...
innovitusa
Jackson, MS
a month ago
Sr. Application Security Engineer
$104.3k - $193.7k
...where your voice is valued. We are seeking an experienced Senior Application Security Engineer to join our team in the corporate travel... ...application development into application security, bringing a developer's mindset to security and operations, and will mentor others while...
Full time
Immediate start
Remote work
Flexible hours
American Express Global Business Travel
Jackson, MS
4 days ago
Field Application Engineer
$117k - $146.5k
...will work closely with the Aerospace and Defense business to develop and execute sales strategies, provide technical expertise, and... ...Other US locations considered. Manage a portfolio of advanced application and system solutions with key Aerospace and Defense customers...
Permanent employment
Temporary work
Work experience placement
Flexible hours
Honeywell Technologies
Jackson, MS
1 day ago
Developer - Applinx Web Developer
...Description Job Description MDHS is currently seeking Applinx Web developers to continue maintaining the Applinx web development... ...designs that have been implemented in the JAWS and MAVERICS legacy applications. Limited enhancements may also be needed as necessary. MDHS...
For contractors
Novalink Solutions LLC
Jackson, MS
2 days ago
Developer - Applinx Web Developer - MS - MDHS
Security Comments : Position Description : No MBR. % Onsite required. There is an incumbent for this posting due to a current contract extension, however, the agency is required to interview more than the incumbent and consider all candidates submitted to the...
Contract work
RICEFW Technologies Inc
Jackson, MS
1 day ago
Applinx Web developers
...Urgent Position || ApplinX Web Developer || Jackson, MS (Onsite from day one) Position: ApplinX Web Developer Duration: At... ...designs that have been implemented in the JAWS and MAVERICS legacy applications. Limited enhancements may also be needed as necessary. MDHS...
TechNix LLC
Jackson, MS
1 day ago
ApplinX Web Developer
...Job Description Job Description Job Title: ApplinX Web Developer Job Code: MS 166066 Client: State of Mississippi – MDHS... ...modernization implemented across the JAWS and MAVERICS legacy applications . The consultant will collaborate with MDHS staff to...
Contract work
Monday to Friday
S R INTERNATIONAL INC
Jackson, MS
1 day ago
Web Developer
...disrupt, and thrive! KēSTA I.T is actively seeking a Web Developer for an immediate contract engagement with our client.... ...support the ongoing maintenance and modernization of legacy applications through ApplinX web development solutions. This role will maintain...
Permanent employment
Full time
Contract work
Temporary work
Immediate start
Work from home
KēSTA I.T.
Jackson, MS
2 days ago
ApplinX Web Developer
...Job Description Job Description ApplinX Web Developer Location: Jackson, MS Work Arrangement: Onsite No Remote Option... ...development modernization solutions implemented within legacy applications. The consultant will be responsible for maintaining existing...
Contract work
Remote work
Vision Square Inc
Jackson, MS
2 days ago
Applinx Web Developer (Onsite)
...Job Title: Applinx Web Developer (Onsite) Location: Jackson, MS Duration: 3+ Years Job Description: The Client... ...that have been implemented in the JAWS and MAVERICS legacy applications. Limited enhancements may also be needed as necessary. The...
Serigor Inc.
Jackson, MS
1 day ago
Sr Software Engineer
$170.6k - $261.3k
...vehicle to cloud. We are seeking a Senior Software Engineer to develop the services, integrations, automation, and end-to-end observability... ...a good faith estimate only. It is based on what a successful applicant might be paid in accordance with applicable state laws. The...
Full time
Local area
Remote work
Work from home
Relocation package
Flexible hours
General Motors
Jackson, MS
19 hours ago
Senior Software Developer
$79.8k - $178.1k
...to intermediate knowledge of software architecture to perform software development tasks associated with developing, debugging or designing software applications or operating systems according to provided design specifications. Build improvements within an existing software...
Temporary work
Relocation
Flexible hours
Oracle
Jackson, MS
3 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Application Developer III. Be the first to apply!