Mainframe Programmer Contract Jobs in California

About OUTFRONT

We are one of North America's most innovative media companies. We leverage the power of creative excellence, unbeatable locations and smart audience data to change the game for advertisers. Our purpose as a company is to help people, places and businesses grow stronger. To do this, we make meaningful connections between brands and people when they are outside of their homes through one of the largest and most diverse sets of out-of-home assets including billboards, transit and mobile displays across the U.S. We connect diverse audiences across over 150 markets and conduct our business considering all our stakeholders, from clients and employees, to the communities where we operate. We are committed to creating a diverse and inclusive work environment that promotes the growth of our people. Come join our industry-leading team!

What We Offer

OUTFRONT offers a comprehensive benefits program including:

• Medical, Dental, Vision (including same and opposite-sex domestic partners)
• HSA and FSA plans, Family Benefits, Pet Benefits
• 401(k) Plan with an Employer Match
• Paid Time Off, Commuter Benefits, Educational Assistance
• Robust Diversity, Equity and Inclusion program including 7 Employee Resource Groups (ERGs)

We are undergoing a major platform transformation, rebuilding mission-critical systems currently running on IBM (AS/400) and legacy mainframes into a modern, cloud-native, event-driven architecture integrated with third-party SaaS platforms.

Role Overview

We're seeking a Senior Software Engineer with deep backend expertise and enterprise experience to lead the development of multiple products and services within our modern advertising platform. This role requires strong technical ownership, hands-on coding, and a passion for mentoring junior engineers.

You'll work across a remote-first engineering team to design and deliver scalable, secure, and modular systems that integrate third-party SaaS solutions and proprietary microservices in a primarily AWS-based environment.

The platform spans key business domains including Lease Management (asset contracts), Inventory, Orders, Campaign Delivery, Billing/Revenue Recognition, Reporting, and DOOH operational workflows.

Your leadership will help shape the technical direction of the platform, elevate team capabilities, and contribute to a high-quality engineering culture.

Key Responsibilities

• Design, build, and maintain scalable APIs and microservices across multiple products and services, including lease management, pre-sales, contract, inventory, order,
• creative, planning/delivery, billing/revenue recognition, reporting, and DOOH workflows
• Lead the modernization of legacy systems (AS400/mainframe) into cloud-native, domain-driven microservices
• Build and operate event-driven systems using Kafka for real-time processing and system communication
• Lead the integration of third-party SaaS platforms and external systems into our cloud ecosystem
• Architect distributed systems for high availability, scalability, modularity, and fault tolerance
• Define and enforce service contracts and communication protocols (REST and GraphQL)
• Design and implement low-latency, high-throughput systems supporting business-critical workflows
• Work with core data stores and caching systems, including: PostgreSQL, MySQL, Redis, DynamoDB (or similar NoSQL systems)
• Contribute to frontend development using React or Vue.js where applicable
• Deploy and operate services on Kubernetes (EKS/Fargate) using Terraform and Helm
• Implement and enhance observability, including: Custom metrics and instrumentation, Integration with CloudWatch, Integration with Datadog or Grafana, Prometheus Mentor and upskill junior engineers through code reviews, pair programming, and knowledge sharing
• Collaborate with cross-functional teams to align on technical strategy and product goals
• Assist with system design and architecture and contribute to long-term platform vision and decision-making
• Help maintain high standards for interviewing, hiring, and onboarding processes
• Ensure CI/CD best practices and system reliability
• Promote engineering excellence through documentation, testing, and continuous improvement

Minimum Qualifications

• 7-12+ years of software engineering experience, including enterprise-scale systems
• Proven experience owning and delivering multiple backend services or products
• Strong proficiency in Java (Spring Boot preferred) or similar backend technologies
• Deep understanding of distributed systems, microservices, and event-driven architecture
• Experience with Kafka or similar messaging/streaming platforms
• Experience building scalable, high-performance systems
• Experience with AWS cloud platform (preferred) (Experience with GCP or Azure is also acceptable)
• Hands-on experience with Docker and Kubernetes
• Experience working with relational and NoSQL databases (PostgreSQL, MySQL, Redis, DynamoDB or similar)
• Strong knowledge of API design, authentication/authorization (OAuth, JWT), and versioning
• Experience with infrastructure as code (Terraform) and deployment tooling (Helm) Experience implementing monitoring and observability solutions (Datadog, Grafana, Prometheus, CloudWatch, etc.)
• Demonstrated ability to mentor junior engineers and foster team growth
• Excellent communication skills in remote-first environment

Preferred Qualifications

• Master's degree or higher in Computer Science, Software Engineering, or a related field
• Experience in DOOH platforms or enterprise sales/order management systems
• Experience with AdTech or ad server ecosystems
• Experience with legacy modernization (AS400, mainframe microservices)
• Experience with Lease Management or asset-based systems

Tech Stack Highlights

• Backend: Java, Spring Boot, REST / GraphQL APIs
• Frontend: React, Vue.js
• Streaming: Kafka / MSK
• Cloud: AWS (EKS, Fargate, DynamoDB, CloudWatch)
• Infra: Terraform, Helm, Docker, Kubernetes
• Data: PostgreSQL, MySQL, Redis, DynamoDB
• Observability: Datadog, Grafana, Prometheus, CloudWatch

The salary range for this role is $150-175,000. Compensation is determined during our interview process by assessing a candidate's experience and skills relative to internal peers and market benchmarks evaluated for the scope and responsibilities of the position. Please note that the foregoing compensation information is a good-faith assessment associated with this position only and is provided pursuant to the California Salary Transparency Law.

OUTFRONT Media is not responsible for any fees related to unsolicited resumes.

OUTFRONT Media Is An Equal Opportunity Employer

All applicants shall receive equal consideration without regard to race, color, religion, gender, marital status, gender identity or expression, sexual orientation, national origin, age, veteran status or disability. Please refer to the OUTFRONT Media Affirmative Action policy statement.