The Fin. Tech Platform team is seeking a Senior backend development Engineer will collaborate with a team of software engineers to design, implement, and deploy complete, cloud-native systems that meet customer requirements. This role focuses on the creation, enhancement, and maintenance of software solutions, which typically include back-end services, microservices, databases, and the cloud infrastructure required to support deployment and operations. The engineer is responsible for owning the end-to-end software lifecycle — from development to deployment and support. As a generalist, the Senior Engineer is expected to have broad knowledge across the full technology stack. We take pride in fostering a culture of innovation, embracing agile methodologies, and promoting transparency in all aspects of our work. Join us in embodying the spirit of the Un-carrier and make a tangible impact! Our team is dynamic, diverse, and no two days are ever the same. - - - This position will sit in Frisco, TX; Bellevue, WA; OR Atlanta, GA This is not a remote role - this is a hybrid environment requiring 3 days a week in office. - - - This position will sit in Frisco, TX; Bellevue, WA; OR Atlanta, GA This is not a remote role - this is a hybrid environment requiring 3 days a week in office. Job Responsibilities. Design and develop end-to-end backend development solutions, covering both backend and frontend components. Conduct code reviews, provide technical guidance, and mentor junior and mid-level team members. Develop and schedule automated jobs and microservices, establishing new patterns and orchestration workflows. Design and implement data storage solutions using both relational (e.g., Postgre. SQL) and non-relational databases. Deploy and manage cloud infrastructure using Infrastructure as Code (Ia. C) tools such as Terraform or Cloud. Formation. Evaluate and recommend emerging cloud services, tools, and architectural patterns to optimize system performance and scalability. Propose and champion innovative solutions to improve existing systems, processes, and services. Introduce and apply modern frameworks and technologies to enhance platform capabilities and technical velocity. Partner with product owners and engineering teams to break down features into user stories, estimate complexity, and plan sprints. Stay current with emerging technologies and continuously invest in skill development and cross-training. Effectively communicate technical ideas, constraints, and trade-offs to both technical and non-technical stakeholders. Demonstrate strong ability to quickly learn new tools and frameworks in dynamic development environments. Maintain awareness of the organization’s technology roadmap and contribute to long-term platform planning. Track and analyze industry trends, incorporating best practices and forward-thinking engineering techniques into day-to-day work. Education and Work Experience:Bachelor's Degree Computer Science or Engineering, or related technical field (Required)4-7 years Technical engineering experience. Required 4 years of backend development experience, with strong proficiency in backend technologies such as Java and RESTful Web Services — Frontend experience is a plus 4 years of software engineering experience delivering robust, scalable, and secure applications — Required 3 years of hands-on experience designing and developing ETL pipelines for data ingestion, transformation, and integration 3 years of working experience with cloud platforms, primarily the AWS ecosystem — including services like EC 2, S 3, RDS, Lambda, Cloud. Watch, ECS/ EKS, and IAM — Required 2 years in DevOps and Infrastructure as Code (Ia. C) practices using tools like Terraform, Cloud. Formation, or AWS CDK 3 years of experience designing and maintaining both SQL and NoSQL database systems, including strong proficiency in Postgre. SQL ?Preferred Skills:2 years of professional experience in the Fin. Tech industry, with a focus on regulated environments, compliance, or financial data platforms — Nice to have. Knowledge, Skills and Abilities:Communication (Required)Customer Service (Required)Analytics (Required)Technical Writing (Required)At least 18 years of age. Legally authorized to work in the United States. Travel:Travel Required (Yes/ No): Yes. DOT Regulated:DOT Regulated Position (Yes/ No): No. Safety Sensitive Position (Yes/ No): No. Base Pay Range: $113,600 - $205,000 Corporate Bonus Target: 15%The pay range above is the general base pay range for a successful candidate in the role. The successful candidate’s actual pay will be based on various factors, such as work location, qualifications, and experience, so the actual starting pay will vary within this range. At T-Mobile, employees in regular, non-temporary roles are eligible for an annual bonus or periodic sales incentive or bonus, based on their role. Most Corporate employees are eligible for a year-end bonus based on company and/or individual performance and which is set at a percentage of the employee’s eligible earnings in the prior year. Certain positions in Customer Care are eligible for monthly bonuses based on individual and/or team performance. To find the pay range for this role based on hiring location, ID=REQ 331812¶dox=1