Top Senior Software Engineer Jobs in Phoenix, AZ

Lead hands-on software delivery for the BUURT platform: write and review code daily, stabilize production, define architecture, establish audit-ready SDLC and SOC 2-aligned controls, lead and mentor distributed developers, and partner with product to deliver scalable, testable releases.

The Senior Software Engineer will develop foundational services and SDKs, optimizing cloud functions, backend services, and enhancing user experience through collaboration with product teams.

Maintain source and binary repositories, ensure builds, packaging, versioning and delivery to teams. Define SCM intake/workflows, automate build/CI processes, perform repo and JIRA administration, and develop scripts for packaging, releases and integration with CI/test systems.

Design, develop and execute end-to-end test plans, scripts and emulation for IoT platform components (devices, gateways, protocols, cloud). Define observability/instrumentation, produce quantitative metrics, and lead small technical teams to validate E2E data flows.

Design, build, and operate Venmo's AWS cloud infrastructure, CI/CD pipelines, and automation. Mentor junior engineers, troubleshoot incidents, implement infrastructure-as-code, improve reliability and security, and deliver production-ready solutions across the full SDLC.

Design, implement, test, and operate Venmo's cloud infrastructure and CI/CD systems. Mentor junior engineers, troubleshoot incidents, build automation and infrastructure-as-code, improve reliability, and drive projects end-to-end for AWS-based, containerized services.

Lead architecture, design, and delivery of scalable, secure distributed payment systems for a next-generation digital wallet. Drive technical strategy, mentor teams, own features to production, troubleshoot incidents, and improve engineering practices, tooling, and testing to meet product and security goals.

Own and set technical direction for the Everand backend, building scalable, reliable systems for discoverability, personalization, and core consumption journeys. Drive architecture, platform health (CI/CD, staging, DBs, queues, cost, observability), mentor engineers, lead cross-team planning, modernize legacy systems, and partner with product, design, analytics, web/mobile, and ML to support experimentation and telemetry-driven decisions.

The Senior Software Engineer at Carvana will drive large-scale projects, develop scalable solutions, collaborate with teams, and mentor junior developers, primarily using C# and JavaScript technologies.

Develop and optimize auto-labelling systems using ML and computer vision, manage data pipelines, and collaborate with researchers.

The Senior Software Engineer will collaborate on project scopes, optimize functionality, and ship cloud functions and backend services using Kotlin, enhancing user experience.

The Staff Software Engineer will develop and support product features, enforce coding best practices, mentor junior engineers, and contribute to architectural decisions in a fintech environment.

The role involves building data-focused products using various technologies, focusing on backend and frontend development, RESTful APIs, and cloud-native solutions, while ensuring data accessibility through innovative design and architecture.

Design and implement mainframe-based software for claims processing using COBOL, CICS, DB2 and related tools. Architect solutions, write and test code, debug, perform code reviews, integrate systems, and produce technical documentation. Work in Agile teams, collaborate with stakeholders and offshore vendors, and support claim adjudication and payment processes.

As a Senior Software Engineer, you'll lead the development of Android applications for robotic systems, integrating with cloud services and mentoring the team.

Owner of full-stack features and platform reliability: build scalable web applications, optimize PostgreSQL performance, maintain asynchronous infrastructure (Celery), migrate frontend to server-side HTMX, ship revenue-driving features, ensure observability and SLO-driven reliability, collaborate cross-functionally, write testable code, and participate in architecture and code reviews.

Design and maintain robust CI/CD pipelines, manage integrations with large customer repositories, develop full-stack software, provision cloud infra with Terraform, and implement scalable data pipelines. Learn and apply PySpark, modern data architecture, and AI/agentic tools (Claude, Cursor) to automate and accelerate engineering workflows.

Design, implement, and scale event-driven, distributed backend systems in Python on AWS to process and enrich large-scale document and media datasets. Lead technical projects, mentor engineers, integrate ML/LLM components, optimize performance, maintain observability, and collaborate with Data Science, ML Engineering, and Product to deliver reliable high-throughput content processing services.

Lead technical efforts to build reliable applications and infrastructure at Oscar, mentoring junior engineers and collaborating on complex projects.

As a Senior Software Engineer, you will build and maintain applications and infrastructure for health care, collaborating with team members to solve problems and improve technology.

The role involves backend engineering, supporting the Benefits module, troubleshooting production issues, mentoring junior engineers, and ensuring system reliability.