Software Engineer

Software Engineer III (Full Stack / .NET + React)OverviewWe are seeking an experienced Software Engineer III to design, develop, and deliver scalable, high-performing solutions as part of a modern engineering team. This role combines strong backend .NET expertise with advanced frontend development in React, and includes mentorship, architectural input, and ownership of key system components.Key ResponsibilitiesDesign, develop, and implement scalable software solutions and new product featuresBuild and enhance large-scale React-based applications and strategic platform initiativesParticipate in the full Software Development Life Cycle (SDLC): design, development, testing, and deploymentTranslate business and functional requirements into technical solutionsContribute to architectural discussions and influence technical directionDevelop high-quality frontend components with a focus on performance and usabilityImprove system performance, scalability, and reliability while reducing operational overheadOwn and deliver complete components or features within applicationsCollaborate with distributed engineering teams to determine optimal technical solutionsDesign solutions in ambiguoproblem spaces and define system interactionsEstablish and promote engineering best practices, standards, and technologiesMentor junior developers and support team growthTrack issues through resolution and provide regular updates to leadershipPerform code reviews and contribute to design reviews across projectsProvide project estimates, task breakdowns, and risk assessmentsIdentify long-term architectural improvements and technical debtOccasionally serve in a Team Lead capacityAct as a subject matter expert for assigned applicationsContinuously improve development processes and team effectivenessRequired Technical SkillsCore Technologies:.NET / .NET CoreC#ASP.NET / MVC architectureREST APIsReactJavaScript / TypeScriptSQL ServerMicroservices architectureAdditional Technologies:MongoDB, PostgreSQLRedis or caching solutionsCI/CD tools (Jenkins or equivalent)Git-based source control (GitHub, GitLab, etc.)Terraform, Ansible (nice to have)Cloud platforms (AWS, Azure, or Google Cloud Platform) - preferredRequired Qualifications7+ years of software development experience with a focus on .NET technologiesStrong proficiency in C# and .NET / .NET CoreExperience with ASP.NET and MVC design patternsExpertise in building single-page applications (SPA)Experience developing and consuming RESTful and/or RPC APIsAdvanced React experience (components, routing, state management)Strong knowledge of web technologies (HTML5, CSS3, JavaScript/TypeScript)Experience building microservices-based architecturesStrong experience with relational databases (SQL Server, PostgreSQL)Experience with NoSQL solutions (MongoDB) and caching tools (Redis)Experience with CI/CD pipelines and automated deploymentsSoft Skills & CompetenciesStrong analytical and problem-solving skillsExcellent verbal and written communication skillsHigh attention to detail and accuracyAbility to manage multiple priorities in a fast-paced environmentStrong collaboration skills across distributed teamsAbility to adapt to changing priorities and deadlinesWork Environment & ExpectationsAbility to manage multiple concurrent tasks and deadlinesStrong focus and attention to detail for extended periodsEffective decision-making and problem resolution under pressureComfortable working in dynamic, evolving technical environmentsJob Type & LocationThis is a Contract position based out of Lenexa, KS.Pay and BenefitsThe pay range for this position is $105.55 - $112.50/hr.Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: Medical, dental & vision Critical Illness, Accident, and Hospital 401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available Life Insurance (Voluntary Life & AD&D for the employee and dependents) Short and long-term disability Health Spending Account (HSA) Transportation benefits Employee Assistance Program Time Off/Leave (PTO, Vacation or Sick Leave)Workplace TypeThis is a fully onsite position in Lenexa,KS.Application DeadlineThis position is anticipated to close on May 8, 2026.About TEKsystems: We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company. The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.About TEKsystems and TEKsystems Global Services We're a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We're a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We're strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We're building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.