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Senior Dotnet Developer

Hays
Vienna, Virginia, US$75 – $85Posted February 20, 2026

Salary Context

This role offers $75–$85. The median for Senior-level fullstack roles is $135k–$206k (based on 25 listings). 100% below median.

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JavaScriptSQLReactAzureMongoDB

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Job Description

LOCAL CANDIDATES ONLY - NO C2C/1099

Renewable 6 month contract

Vienna, VA

Rate: $75-85/hr. (HYBRID)

Required Skills

  • 10+ years experience full stack: hands on, end to end custom code -Ability to design, develop, implement, and maintain custom code business solutions across front‑end, back‑end, integrations, and data layers
  • application dev platform & languages: C#/.Net, javascript, react, SQL, MongoDB, Mulesoft, Azure Cloud
  • experience converting legacy solutions into modern languages and platforms
  • qualitative and quantitative analysis

location: hybrid to HQ

TOP SKILLS:

Analyze business needs to develop and implement solutions that leverage systems and

processes with a broad degree of latitude. Work with the business to understand their

needs, related to information technology and enhance business processes by identifying

new functionality. Utilize advanced knowledge of the organization's technology

infrastructure and specific software applications to assist the business with implementing

strategic vision through technology. Coordinate and conduct highly complex system

analyses through data acquisition and modeling. Identify, coordinate, document, and

implement business requirements by determining solutions that enhance business

systems, as well as provide support to business operations and processes. Work is

performed under general direction.

Responsibilities

  • Identify business requirements (e.g., needs, objectives, functions, features, input

and output) and translate into delivered technical solutions

  • Utilize approved software development tools and software

applications to design, develop, implement and maintain custom code business

solutions that align with business initiatives and corporate strategies

  • Facilitate user acceptance testing to include developing and executing test cases,

test criteria, scenarios, and communication with project teams; ensure acceptance

of delivered solutions; validate and document results

  • Partner with project teams to plan, coordinate and roll out software change/release

to Controlled Testing and Production; obtain required approvals and transition

project to production

  • Provide follow-up to monitor the progress of planned improvement project

implementations to ensure timely action, support and achievement of expected

benefits

  • Collaborate with key partners in the development and delivery of solutions
  • Involved in cross-organizational task groups concerning new automated systems,

products and/or services

  • Perform annual recertification on standards as they relate to the

platform

  • Create and maintain accurate, detailed and consistent documentation through all

phases of the Systems Development Life-Cycle

  • Contribute knowledge management articles for created solutions
  • Apply and communicate changes and new trends in systems/technology
  • Evaluate operational efficiency and effectiveness
  • Analyze information, requirements, data, work quality, work methods, processes,

service specific practices, standards and metrics/statistics

  • Interpret results of analysis; present recommendations, alternatives and

implications

  • Analyze, define and document technical design for data, workflow, logical

processes, hardware and operating systems environment, interface with other

systems, internal and external controls and output

  • Identify and communicate key responsibilities and practices, evaluate results, and

provide leadership and guidance to ensure successful implementation of business

unit projects

  • Develop, recommend and document adjustments to workflow to streamline

processes

  • Perform qualitative and quantitative analysis using analytical techniques, tools,

models, simulation, etc.

  • Partner with other business units and vendors to improve procedures, resolve

problems, and implement initiatives; present conclusions and recommendations to

management

  • Utilize performance measurements and indicators to identify areas for

improvement; develop process improvement plans for each performance indicator

or area identified

  • Develop and oversee project plans and roadmaps that outline preventative and

corrective actions necessary to remediate control deficiencies, maximize

effectiveness and mitigate future exposure

  • Perform other duties as assigned

Qualifications

  • Expert knowledge of software development best practices
  • Extensive experience in working with application development platforms (e.g., C#

.Net, React, JavaScript, SQL, MongoDB, MuleSoft, Azure Cloud, etc.)

  • Extensive experience in programming end-to-end custom-code solutions
  • Extensive experience converting older language legacy solutions to modern

languages

  • Extensive experience building solutions from a process where no documentation

exists

  • Extensive experience working in lower and productions environments that are not

completely isolated

  • Extensive experience in developing and testing software
  • Extensive experience with mainframe systems
  • Extensive experience in the application of statistical methods, mathematical

techniques, forecasting, cost-benefit analysis and related analytical tools

  • Expert knowledge of data querying, reporting, forecasting, analysis and operations

research, including statistical methods and modeling

  • Ability to analyze technical issues in order to recommend, develop and/or

implement strategies and achieve objectives

  • Extensive experience in communicating complex technical issues to non-technical

audiences

  • Extensive experience in problem resolution including determining root cause, scope

and scale of issues

  • Extensive experience in leading collaborative work teams
  • Extensive experience in leading projects and/or initiatives large in scope
  • Extensive experience in managing multiple priorities independently and/or in a team

environment to achieve goals

  • Extensive experience that demonstrates the ability to research, compile, and

document data, business processes, and workflow

  • Participate in mandatory standards and policy training, including

information security, testing, knowledge management, records information

management and enterprise Architecture Review Board standards

  • Successfully complete required training, assessments and certifications to learn

core principles of the citizen development application development platforms

  • Advanced skill resolving conflicting requests and meeting changing requirements
  • Expert research, analytical, and problem solving skills
  • Expert skill interpreting and synthesizing large amounts of information
  • Expert skill following, interpreting and applying relevant data/instructions to

guidelines, procedures, practices and regulations

  • Expert skill identifying and analyzing business requirements and recommending

solutions

  • Expert organizational, planning and time management skills
  • Expert verbal, interpersonal and written communication skills
  • Expert database, word processing, spreadsheet and presentation software skills
  • Bachelor's degree in Information Technology, Computer Science, or related field, or

the equivalent combination of education, training and experience

Desired Qualifications

  • Master's degree in Information Technology, Computer Science, or related field

Benefits/Other Compensation

This position is a contract/temporary role where Hays offers you the opportunity to enroll in full medical benefits, dental benefits, vision benefits, 401K and Life Insurance ($20,000 benefit).

Why Hays?

You will be working with a professional recruiter who has intimate knowledge of the industry and market trends. Your Hays recruiter will lead you through a thorough screening process in order to understand your skills, experience, needs, and drivers. You will also get support on resume writing, interview tips, and career planning, so when there’s a position you really want, you’re fully prepared to get it.

Nervous about an upcoming interview? Unsure how to write a new resume?

Visit the Hays Career Advice section to learn top tips to help you stand out from the crowd when job hunting.

Hays is committed to building a thriving culture of diversity that embraces people with different backgrounds, perspectives, and experiences. We believe that the more inclusive we are, the better we serve our candidates, clients, and employees. We are an equal employment opportunity employer, and we comply with all applicable laws prohibiting discrimination based on race, color, creed, sex (including pregnancy, sexual orientation, or gender identity), age, national origin or ancestry, physical or mental disability, veteran status, marital status, genetic information, HIV-positive status, as well as any other characteristic protected by federal, state, or local law. One of Hays’ guiding principles is ‘do the right thing’. We also believe that actions speak louder than words. In that regard, we train our staff on ensuring inclusivity throughout the entire recruitment process and counsel our clients on these principles. If you have any questions about Hays or any of our processes, please contact us.

In accordance with applicable federal, state, and local law protecting qualified individuals with known disabilities, Hays will attempt to reasonably accommodate those individuals unless doing so would create an undue hardship on the company. Any qualified applicant or consultant with a disability who requires an accommodation in order to perform the essential functions of the job should call or text 813.336.5570.

Drug testing may be required; please contact a recruiter for more information.

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