Top Senior Software Engineer Jobs in Phoenix, AZ

Designs and develops scalable software across IoT, web, mobile, backend, and AI product teams. Responsibilities include architecting features, writing Elixir, React, and React Native code, building REST and GraphQL APIs, integrating hardware, optimizing high-volume event systems, refactoring legacy systems, conducting code reviews, mentoring engineers, and delivering secure, maintainable solutions.

Designs, builds, and operates AWS cloud networking and routing infrastructure, including VPCs, transit gateways, load balancers, CDN, WAF, ingress, and service mesh systems. Develops Terraform infrastructure as code, troubleshoots network and TLS incidents, supports edge services through on-call rotation, and documents operational practices. Partners with SRE, security, and product engineering teams while mentoring engineers and driving technical best practices.

Lead architecture and technical direction for the EGPWS software core. Drive design decisions, mentor distributed teams, manage risk, own technology roadmap, support product line and certification/IP activities.

Designs, develops, integrates, tests, and validates complex healthcare software. Provides architecture and coding expertise, leads technical proposals and program objectives, defines features, supports customers, and serves as the primary technical authority. Requires hands-on QNXT experience, healthcare software architecture expertise, integration experience, analytics knowledge, software development lifecycle understanding, and configuration and change management knowledge.

Lead and deliver complex Android features, set technical direction, mentor junior engineers, improve CI/CD and observability, collaborate cross-functionally, support production incidents and drive architectural improvements.

As a Software Engineer II, you will design, develop, and maintain Java applications, optimize data pipelines, collaborate on system initiatives, and implement automation for software delivery while ensuring high availability in production environments.

Lead and organize the RFIO software development team to design, integrate, and certify DAL A avionics software. Develop software requirements, perform code reviews, interface with hardware and FPGA teams, support flight testing, and prepare certification and planning documentation following DO-178C/DO-254/DO-160G standards.

Develop and integrate avionics systems software with RF expertise, lead teams through DAL A development and certification (DO-178C/DO-254/DO-160G), perform system/hardware test and lab maintenance, manage requirements, planning, verification, and customer/FAA interfaces, and support flight test and certification documentation.

Designs, develops, tests, deploys, and maintains C#/.NET applications, APIs, and services. Translates business requirements into scalable technical solutions, troubleshoots complex issues, participates in code reviews, supports CI/CD, and contributes to secure and reliable software delivery. Provides technical guidance and mentorship while collaborating with engineering, product, and business stakeholders. Preferred experience includes AWS, Docker, Kubernetes, event-driven architectures, automated testing, observability, and modernization of legacy .NET applications.

Lead full software development lifecycle: design, develop, test, deploy and maintain reliable distributed applications. Collaborate cross-functionally, perform code reviews and automated testing, and deliver performant technical solutions aligned with business goals.

Design and build cloud-native microservices and scalable data pipelines for a Risk Decision platform. Write high-quality Java code, automate testing and releases, implement CI/CD, apply LLM/agentic AI to improve engineering workflows, collaborate across teams, and support application availability and scalability.

Design and develop safety-critical real-time embedded software for avionics flight control systems. Implement and debug C/C++ code, work in lab environments, follow DO-178 processes, use DOORS for requirements, and support surveillance/data-collection software (preferred).

Develop and integrate system software and RF for avionics (TCAS, transponder, ADS-B, DME). Lead teams to produce SW requirements, DAL A development, verification/validation, flight and lab testing, certification documentation (SSA, FHA, SRTM, MOPS, TSO deviations), and interface with customers and FAA. Use C/C++/Assembly, version control, CI/CD, and engineering tools to manage builds, testing, and hardware-in-the-loop integration.

The Staff Software Engineer role involves leading projects, coordinating engineers, improving processes, and representing PayPal to external partners, focusing on cloud and DevOps responsibilities.

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 design and implementation of AI-powered tools and cloud infrastructure to improve Venmo's DevOps and SRE workflows. Mentor engineers, build CI/CD and automation, operate distributed applications, troubleshoot incidents, integrate LLMs into developer tooling, and drive reliability, observability, and responsible AI practices across AWS-based infrastructure.

Designs, builds, and operates infrastructure-as-code capabilities using Terraform and Ansible across cloud and on-premises environments. Develops reusable modules, policy-as-code guardrails, testing frameworks, secure credential patterns, configuration automation, and developer self-service tooling. Partners with security, compliance, platform, network, and CI/CD teams to implement controlled infrastructure changes, automate evidence collection, manage drift, and improve reliability. The role also mentors engineers, documents architecture, and leads complex technical initiatives.

Design and implement production-grade backend services and platform APIs in Go. Build Kubernetes-native components (controllers, operators, CRDs, webhooks), integrate with CI/CD, observability, and security systems, and apply AI/agentic programming to automate platform workflows and improve developer productivity. Troubleshoot distributed systems and participate in architecture reviews.

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.

Onsite senior .NET software engineer responsible for full lifecycle application development (60%), maintaining and fixing existing applications (30%), and other tasks (10%). Role requires strong C#, ASP.NET, MVC, JavaScript, Oracle, and Windows server experience. Local Phoenix candidates only; background check required.

Onsite Senior Software Engineer in Phoenix responsible for full-lifecycle application development (60%), fixing and enhancing existing applications (30%), and miscellaneous tasks (10%). Must clear background check and be a local, authorized U.S. worker.

Design, develop, debug, test, document, and support full-stack web and mobile applications using cloud platforms and service-driven architectures. Build secure RESTful APIs, enterprise applications, integrations, and automation tools. Participate throughout the software development lifecycle, including code reviews, validation, vulnerability management, continuous integration, and deployment. Collaborate with product, Scrum, internal, external, client, industry, and government teams to deliver technology solutions for transportation and connected services.

Build production full-stack features and quality infrastructure for AI-generated code, including automated testing, evaluation frameworks, CI/CD quality gates, observability, release criteria, and security guardrails. Use AI coding agents while validating correctness, performance, maintainability, and privacy. Develop scalable services for travel and rewards platforms, protect member trust, and promote AI-assisted engineering quality practices across teams.

Designs and delivers enterprise-grade AI-first full stack applications for Master Data Management. Develops Java backends, React or Angular frontends, REST APIs, microservices, data models, and integrations. Leads architecture, debugging, testing, performance, scalability, code reviews, Agile ceremonies, and technical direction. Uses and evaluates AI coding tools, mentors junior engineers, and collaborates with product, UX, QA, and platform teams.

Design, build, and operate a production AIOps agent platform for event observation, diagnosis, recommendations, and controlled automated actions. Develop agent runtimes, tool interfaces, event routing, telemetry, auditability, evaluation systems, feedback mechanisms, and operator experiences. Establish safety guardrails, approvals, permissions, rollback controls, and reliability standards. Collaborate across engineering, operations, security, risk, and compliance to deliver scalable, explainable, and regulated production capabilities.