Software Engineer + Telecom BSS/OSS Specialist

Ahmed Sadig

Plano, TX +1-571-***-**** *****.*.*.*****@*****.*** LinkedIn GitHub

Summary

IT Professional with 9+ years of experience, including 3+ years as a Software Engineer and 6+ years as a Support Engineer, BSS/OSS Consultant, delivering enterprise-grade solutions across software engineering and telecom domains. Skilled in building scalable, secure, and cloud-enabled applications while driving efficiency in telecom billing and operations. Expertise in Java, Spring Boot, REST APIs, PL/SQL, Oracle, MSSQL, Python, .NET, and cloud platforms (AWS, Azure) with proficiency in microservices architecture, containerization (Docker, Kubernetes), automation, database optimization, and application modernization, enabling high- performing, reliable, and cost-effective solutions. Strong background in telecom BSS/OSS systems, billing operations, convergent systems, and payment integration using platforms such as Ericsson BSCS and CBiO, with proven success in system migrations, process automation, UAT design, incident management, and post-deployment support, ensuring billing accuracy, reducing disputes, and enhancing customer satisfaction. Certified in AWS Solutions Architect, ITIL, and PRINCE2, with demonstrated ability to collaborate in Agile/Scrum teams, adapt to evolving technologies, and deliver innovative, business-driven results. Skills

Programming Languages: Java, Python, .NET, Shell Scripting Web Technologies: HTML, CSS, REST API, JavaScript

Frameworks & Libraries: Spring Boot

Databases: SQL, NoSQL, PL/SQL, Oracle, MSSQL

Cloud Platforms: AWS, Azure

Containerization & Orchestration: Docker, Kubernetes Monitoring & Logging: Splunk

Version Control: Git, GitHub

Project/Workflow Tools: Jira, Agile/Scrum

Operating Systems: Windows, macOS, Linux

Testing & Debugging: Unit Testing, Debugging

Telecom BSS/OSS: Convergent Billing, Ericsson BSCS, CBiO, Billing Operations, Payment Systems Integration.

Technical Support: Incident Management, System Monitoring, Post-Deployment Support. System Performance Monitoring: Daily Payment Run Monitoring, Month-End Close Processes, Fault Isolation Soft Skills: Time Management, Communication, Critical Thinking, Adaptability, Problem-Solving Work Experience

Software Engineer Feb 2025 – Sept 2025

AT&T

Developed aggregator microservices to consume data from internal and external microservices using Spring Boot for deriving reserves-related factors

Apply Java’s concurrency libraries to manage multithreaded tasks and optimize query performance in relational databases using JPA and Spring Data.

Designed and optimized PL/SQL stored procedures, functions, and triggers to enhance application performance and ensure seamless integration with enterprise systems.

Automated data processing, reporting, and system monitoring tasks with Python scripts, saving 20+ hours of manual work per month.

Utilize Python for data processing and manipulation, passing the results to three.js for 3D data visualization in the browser.

Launched scalable applications on AWS, leveraging cloud infrastructure to reduce operational costs and increase system reliability.

Built microservices-based architectures with Java, enabling modular development and faster deployment cycles.

Developed an application integrated with Azure Event Hub to standardize the data pipeline, enabling seamless ingestion of new Google spam reporting logs and contributing to the daily blocking of 3 million SMS messages.

Developed and executed Splunk scheduled searches and reports, providing actionable insights and visualizations that supported spam blocking decisions.

Involved in the design, development, and maintenance of REST APIs to continuously improve the coverage.

Create user interfaces (.aspx pages) with ASP.NET, applying HTML, CSS theming, and validations for seamless user experience.

Migrated legacy applications and databases to Oracle 11g/12c/19c environments, ensuring minimal disruption and improved efficiency.

Implemented microservices architecture with Docker and Kubernetes, enabling seamless scalability across global data centers and reducing operational costs by 10%.

Software Engineer Nov 2023 – Jan 2025

Dell Technologies, Round Rock, TX

Developed automation to bulk migrate GitLab repositories from on-prem to AWS, using REST APIs with batching, pagination, and throttling, improving migration throughput by 10% (Python, REST APIs, GitLab API).

Developed a scalable microservices architecture with Java, boosting system reliability by 30% and supporting a 20% increase in customer base.

Enhance application scalability and performance by 30% through the development of scalable applications using Java and Spring Boot.

Collaborated with cross-functional teams to integrate Oracle databases with Java, Python, and middleware applications, ensuring data consistency and scalability.

Implemented RESTful endpoint services using Spring MVC API, Spring Boot, and returned JSON response for each of the reserve calculations

Implemented multithreading and concurrency in Java to handle high-volume transactions, improving processing speed by 35%.

Created Splunk Observability Dashboards with alerts to help identify and resolve issues, ensure the reliability and availability of services, and identify and mitigate potential issues in the process at an early stage before impacting the business.

Design and implement ASP.NET WebForms and MVC applications, ensuring scalability, security, and performance optimization.

Maintained and optimized databases using SQL, resulting in a 15% reduction in data errors and a 10% increase in data accuracy.

Automated the process of deploying this framework on a Docker system. Effort reduced setup time by 30%.

Followed Agile methodology for developing the application and was involved in analysis, design, development, and testing activities of the Software Development Life Cycle

Other Experience

Senior Support Engineer Sep 2022 – Oct 2023

Ericsson

Led end-to-end incident management, outage resolution, and parameter configuration for large-scale telecom billing and revenue management systems, ensuring high service availability and seamless business operations.

Diagnosed and resolved critical production defects in Java-based billing and credit management platforms, proactively preventing 5% potential revenue loss and enhancing system reliability and customer satisfaction.

Spearheaded the migration and optimization of a provisioning module, improving system efficiency, transaction processing speed, and scalability by 40%, and reducing operational overhead.

Engineered and automated PL/SQL scripts, triggers, and monitoring alerts to validate payment flows, detect anomalies, and eliminate revenue leakage, strengthening financial accuracy and compliance. BSS/OSS Consultant Jan 2017- Aug 2022

Huawei Technologies

Led a strategic migration of the Convergent Billing System, improving billing operations and boosting customer satisfaction.

Automated invoice generation in a customized format for VIP clients, resulting in $50K in cost savings for the company.

Developed pre/post checks and alarms to ensure billing accuracy, reducing disputes by 20%.

Successfully executed a strategic billing system migration, resulting in streamlined operations and increased customer satisfaction.

Designed UAT test cases and collaborated with business analysts to model and optimize business processes. Senior BSS Analyst Feb 2016 – Dec 2016

Etisalat, UAE

Automated wrong charge adjustments before the billing cycle to prevent bill shocks.

Automated the generation of aging and payments reports for both the credit control and finance teams.

Supported month-end close processes.

Education

B.Sc. Bachelor of Science: Information Technology (2001 - 2006) Computer Man College, Sudan

Certificates

AWS Solutions Architect – Associate

AWS Cloud Practitioner

ITIL Foundation

PRINCE2 foundation

Oracle 11g: SQL Fundamentals I 1Z0-051

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