Senior Software Developer (.NET)

An extraordinarily talented group of individuals work together every day to drive TNS' success, from both professional and personal perspectives. Come join the excellence! Overview The Software area is responsible for the development of computer programming systems and applications including the design, coding, testing and deployment of products and solutions to meet firm obligations. Responsibilities Position Summary: You will be part of a highly collaborative professional technology team building on innovative payments processing solutions. A Software Developer at TNS is expected to pursue self-improvement, innovation and the adoption of best practice to enhance the team's productivity and effectiveness. As part of a vibrant and entrepreneurial working culture you will be assessed on your creativity and ability to contribute beyond the formal definition of your role. As part of this role, you will be helping stakeholders understand and analyze how the system will achieve essential qualities such as modifiability, availability, and security. Primary Duties and Responsibilities: Aiding with analysis, problem-solving, development and delivery of maintainable and efficient software solution elements across TNS’ business capabilities. Develop software which meets or exceeds TNS’ quality and performance standards. Function collaboratively as a member of a professional technology team engaged in the structured and prompt delivery of technology solutions. Pursue self-improvement, innovation and the adoption of best practice to enhance the team's productivity and effectiveness. Develop and execute test plans that thoroughly test applications and allow for quality implementation of applications. Prepare and maintain documentation of applications and systems. Communicate status, issues and risks with leaders promptly. Deliver outcomes that fit within the design direction and architectural boundaries provided by the design team. Provide consistent and improving level of quality within the code base, working with the Quality Assurance team to allow an efficient, high quality test capability. Provide delivery outcomes that minimize impact on operations while maintaining third-level support, delivering increased stability to TNS’ enterprise applications. Qualifications: Minimum 14 years of experience in IT industry Experience developing applications using C# and the .NET/.NET Core ecosystem. Advanced experience building solutions with Core, including Web API and MVC. Strong understanding of RESTful API design and experience integrating with distributed systems and microservices. Experience working with Entity Framework Core or other ORM frameworks. Strong experience developing with JavaScript/TypeScript. Hands‑on experience with modern front‑end frameworks such as React; additional experience with Angular, AngularJS, or jQuery is a plus. Ability to work both independently and as part of a collaborative team. Demonstrated experience providing work item estimates for tasks and features. Ability to manage time effectively and meet agreed‑upon deadlines. Experience preparing and maintaining technical documentation for applications and systems. Optional Desired Qualifications: Experience working within a Scrum/Agile team, including an understanding of various Scrum roles. Experience writing User Stories and acceptance criteria. Familiarity with Git and tools such as Azure DevOps, GitHub, Jira, Bitbucket, Confluence, or Bamboo. Experience with test‑driven development (TDD) using frameworks such as xUnit, NUnit, or Selenium. Experience with creating and reviewing design documentation. Basic knowledge of SQL Server, PostgreSQL, RabbitMQ, Azure Service Bus, IdentityServer, , or other related libraries and tools. Experience with build and dependency tools like MSBuild, NuGet, or Cake. Experience building applications using Razor Pages, Blazor, Core MVC, or Web Services (REST/SOAP). Good understanding of HTML, CSS, AJAX, and general front‑end integration concepts. Familiarity with cloud platforms, preferably Azure, including services like App Service, Functions, Storage, Key Vault, ARM/Bicep, and Monitoring. Experience with automation tools such as Ansible, Terraform, Puppet, or Chef. Experience with containerization using Docker and orchestration frameworks like Kubernetes, AKS, or EKS. Experience working within Linux and Windows Server environments. Education and Certifications: Computer science degree or equivalent work experience within a professional software environment. Payment industry experience highly desired Qualifications If you are passionate about technology, love personal growth and opportunity, come see what TNS is all about! TNS is an equal opportunity employer. TNS evaluates qualified applicants without regard to race, color, religion, gender, national origin, age, sexual orientation, gender identity or expression, protected veteran status, disability/handicap status or any other legally protected characteristic.