Senior Engineer

Job Description:

At AT&T we're redefining the future of communication by connecting people to greater possibility - with expertise, simplicity, and inspiration. At the heart of our purpose lies a diverse workforce of 200,000 people and a culture that aspires to serve customers first, act boldly, move faster, and win as one.

Our Product Development group, part of AT&T's Technology Services (ATS) organization, is responsible for building software-based products, services, and platforms that our customers love and need. Harnessing technology and rebuilding software expertise, the team is inspiring simplicity with projects that deliver revenue and cost savings opportunities.

Job Overview

As a Senior .NET Engineer, you will play a critical role in designing, developing, and maintaining high-quality software solutions to transform industry-standard order, delivery, and assurance management systems.

In this role, you will collaborate closely with Product Management, Business Systems, and Operations teams to develop and enhance AT&T's software platforms, working on new features, enhancements, and defect resolution throughout the development lifecycle.

You will independently deliver robust, scalable systems, contribute to technical discussions, and mentor less experienced team members in a collaborative, agile environment focused on continuous improvement and innovation.

Core Responsibilities

• Design, develop, and maintain scalable applications with deep expertise in .NET (VB.NET)
• Take ownership of key technical deliverables across the full software development lifecycle (SDLC).
• Apply and advocate best practices in software engineering, code quality, testing, and DevOps.
• Leverage AI-driven tools (e.g., GitHub Copilot) and stay current with emerging technologies.
• Use modern testing frameworks (xUnit, NUnit, MSTest), code review, static analysis (Lint, Prettier, Veracode, SonarQube), and CI/CD pipelines (GitHub Actions, Terraform).
• Design and implement APIs (REST, OpenAPI/Swagger)
• Contribute to cloud-native development using Azure, Docker, and Kubernetes.
• Participate in agile processes (Agile/Scrum, SAFe, Kanban) and team ceremonies.
• Collaborate with stakeholders and team members to translate business requirements into effective technical solutions.
• Mentor and support junior developers.

Skills, Knowledge, and Experience

Day-to-Day

• Hands-on coding, troubleshooting, and implementation across the stack.
• Participating in code reviews and technical discussions.
• Provide Day 2 Support (Tier 1 and 2)
• Working to close compliance and other security Mandates
• Collaborating in agile ceremonies, team meetings, and cross-functional projects.
• Mentoring and supporting junior engineers.

Technical Skills

• Deep expertise in the .NET ecosystem, esp. VB.NET
• Console/Windows Services
• Strong experience with SQL and NoSQL databases
• Windows Server Management (Windows Server/IIS/MS SQL)
• Own and drive to closure server outages/issues.
• Experience in automated testing: NUnig, xUnit, MSTest, etc.
• Familiarity with code quality and security tools: Lint, Prettier, Veracode, SonarQube.
• Practical knowledge of CI/CD automation (GitHub Actions, Terraform) and cloud-native platforms (Azure, Docker, Kubernetes).
• Solid understanding of SDLC and agile methodologies (Agile/Scrum, SAFe, Kanban).

Additional Desirable Experience

• Decent understanding of BPM/BPMN and process orchestration
• Familiarity with enterprise platforms: ServiceNow, Salesforce, TM Forum
• Involvement in migration or modernization of legacy systems.
• Experience working in large, distributed enterprise environments.

Education

Bachelor level degree or equivalent in Computer Science, or related field of study.

Benefits

A career with us, a global leader in communications and technology, comes with big rewards. We offer a competitive salary plus an annual company performance bonus. Once you are a part of the team, you will gain some amazing perks and benefits including car allowance, wellness & leisure time contribution, sickness compensation plan, premium medical services, family friendly benefits as well as meal contribution and an extra week of vacation (…and much more).

Salary

Slovakia: Enjoy a competitive base salary starting from 3,700 EUR per month (gross), with the potential for a higher offer based on your skills, experience, and expertise.

Czech Republic: Enjoy a competitive base salary starting from 109,000 CZK per month (gross), with the potential for a higher offer based on your skills, experience, and expertise.

Location and Work Environment

These roles are based in Bratislava, Slovakia; Kosice, Slovakia; and Brno, Czechia. They are hybrid-flex positions requiring presence in the office 1-3 times per week, with occasional travel between these locations.

Ready to find out more? Apply today

Weekly Hours:

40

Time Type:

Regular

Location:

Bratislava, Slovakia

It is the policy of AT&T to provide equal employment opportunity (EEO) to all persons regardless of age, color, national origin, citizenship status, physical or mental disability, race, religion, creed, gender, sex, sexual orientation, gender identity and/or expression, genetic information, marital status, status with regard to public assistance, veteran status, or any other characteristic protected by federal, state or local law. In addition, AT&T will provide reasonable accommodations for qualified individuals with disabilities. AT&T is a fair chance employer and does not initiate a background check until an offer is made.