Lead Full-Stack Engineer
Košice, Slovakia
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 Lead Full-Stack Engineer, you will play a key role in technical leadership and delivery within cross-platform engineering teams, helping 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 take ownership of technical solutions, mentor and guide developers, and ensure the application of best practices, modern standards, and innovative tools. You will architect, design, and deliver robust, scalable systems in a collaborative, agile environment, with a focus on quality, efficiency, and continuous improvement.
Core Responsibilities
Lead cross-functional teams in the end-to-end delivery of complex software projects across the full software development lifecycle (SDLC).
Architect, design, and implement modern, scalable applications using deep expertise in one of: Java (Spring Boot), Python (FastAPI), or Node.js (Nest); with working knowledge of the other two.
Drive adoption and refinement of best practices in software engineering, code quality, testing, and DevOps.
Champion the use of AI-driven tools (e.g., GitHub Copilot, LLMs, RAGs) and evaluate emerging technologies for business impact.
Oversee the design and implementation of robust data persistence layers leveraging SQL and NoSQL (CosmosDB, MongoDB, PostgreSQL, Snowflake, Databricks).
Guide the implementation of modern testing frameworks (Playwright, Cypress), code review, static analysis (Lint, Prettier, Veracode, SonarQube), and CI/CD pipelines (GitHub Actions, Terraform).
Ensure robust API design (REST, OpenAPI/Swagger) and secure, efficient event-driven architectures (Kafka, messaging services).
Promote cloud-native development and efficient use of Azure, Docker, and Kubernetes across teams.
Foster a culture of agile excellence (Agile/Scrum, SAFe, Kanban) and continuous delivery.
Collaborate with stakeholders, product managers, and architects to translate business requirements into world-class solutions.
Coach, mentor, and provide technical guidance to engineers at all levels.
Liaise with external partners and vendors where appropriate.
Skills, Knowledge, and Experience
Day-to-Day
Hands-on coding, code reviews, and troubleshooting across the stack (front-end, back-end, infrastructure).
Setting technical standards and ensuring their adoption throughout the teams.
Driving technical workshops and knowledge-sharing sessions.
Collaborating in agile ceremonies and cross-team alignment meetings.
Technical Skills
Deep expertise in one of: Java (Spring Boot), Python (FastAPI), or Node.js (Nest); with working knowledge of the other two.
Advanced experience with SQL and NoSQL databases, especially CosmosDB, MongoDB, PostgreSQL, Snowflake, and Databricks.
Proficiency with event-driven architecture, Kafka, and messaging services.
Mastery of modern API design: REST, Swagger, OpenAPI.
Expert in automated testing and QA practices: Playwright, Cypress.
Advanced experience in code quality and security tools: Lint, Prettier, Veracode, SonarQube.
Strong background in CI/CD automation (GitHub Actions, Terraform), and cloud-native platforms (Azure, Docker, Kubernetes).
Deep understanding of the full SDLC, Agile/Scrum, SAFe, Kanban.
Familiarity with enterprise platforms: ServiceNow, Salesforce, TM Forum (highly desirable).
Additional Desirable Experience
Experience introducing and scaling AI-driven developer tools within teams.
Track record of transforming legacy systems to cloud-native, event-driven architectures.
Demonstrated success in mentoring, coaching, and upskilling engineering teams.
Experience working with large, distributed enterprise environments.
Education
Bachelor level degree or equivalent in Computer Science, or related field of study.
Compensation:
Salaryranges between 4 400EUR - 6 600EUR gross monthly. The actual offer is based on skills, experience and knowledge.
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 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).
Location
The role is a hybrid-flex position requiring presence in the office 2-3 times per week with occasional travel to the locations in Bratislava/Brno.
Ready to find out more? Apply today!
Weekly Hours:
40Time Type:
RegularLocation:
Kosice, SlovakiaIt 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.
Job ID R-97968 Date posted 01/20/2026
Benefits
Your needs? Met. Your wants? Considered. Take a look at our comprehensive benefits.
- Paid Time Off
- Tuition Assistance
- Medical and dental plans
- Discounts
- Training & Development
Our hiring process
Apply Now
Confirm your qualifications align with the job requirements and submit your application.
Assessments
You may be required to complete one or more assessments, depending on the role.
Interview
Get ready to put your best foot forward! More than one interview may be necessary.
Conditional Job Offer
We’ll reach out to discuss a conditional job offer and the next steps to joining the team.
Background Check
Timing is important – complete the necessary actions to proceed with onboarding.
Welcome to the Team!
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