Sr. Engineer, Software

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Job Overview
The FinTech 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.

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., PostgreSQL) and non-relational databases.

• Deploy and manage cloud infrastructure using Infrastructure as Code (IaC) tools such as Terraform or CloudFormation.

• 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 EC2, S3, RDS, Lambda, CloudWatch, ECS/EKS, and IAM — Required

• 2+ years in DevOps and Infrastructure as Code (IaC) practices using tools like Terraform, CloudFormation, or AWS CDK

• 3+ years of experience designing and maintaining both SQL and NoSQL database systems, including strong proficiency in PostgreSQL ​

Preferred Skills:

• 2+ yea