Senior Software Engineer - Application Development

Company Description

Zayo provides mission-critical bandwidth to the world’s most impactful companies, fueling the innovations that are transforming our society. Zayo’s 141,000-mile network in North America and Europe includes extensive metro connectivity to thousands of buildings and data centers. Zayo’s communications infrastructure solutions include dark fiber, private data networks, wavelengths, Ethernet, and dedicated Internet access. Zayo serves wireless and wireline carriers, media, tech, content, finance, healthcare and other large enterprises.

Do you enjoy turning complex technical challenges into reliable, well-designed software? Are you passionate about building applications, integrations, and services that power your organization? If so, then we want you on our team!

We’re looking for a talented Senior Software Engineer, Application Development to join our growing team. In this role, you’ll help design, build, deploy, and support software services that power network observability across Zayo. This is a hands-on individual-contributor role. You will own complex services and cross-service capabilities, translate ambiguous operational needs into scalable solutions, mentor other engineers, and establish practical engineering standards. You will partner with Software Architecture, Network Operations, SRE, DevOps, Infrastructure, Security, product stakeholders, and network-domain experts to ensure services are secure, testable, deployable, observable, resilient, and supportable in production.

Technology Environment 

Our environment includes technologies such as:

• Backend: Python 3.11+, FastAPI, gRPC, Pydantic, Protobuf, SQLAlchemy, and Alembic

• Data and messaging: PostgreSQL, NATS, Redis and asynchronous messaging

• Platform and delivery: Docker, Kubernetes, GitLab CI, Helm, and Terraform

• Observability and networking: Prometheus, Grafana, OpenTelemetry, Elasticsearch, VictoriaMetrics, gNMI, SNMP, NETCONF, and vendor APIs

The technology mix varies by service. Equivalent experience with comparable frameworks, messaging platforms, databases, and infrastructure technologies is welcome.

Responsibilities 

• Lead the architecture, design, implementation, and operation of complex backend Python services, APIs, and data-processing workflows, translating ambiguous requirements into clear technical approaches while remaining hands-on in the codebase.

• Design asynchronous and event-driven integrations and establish scalable patterns for API and event contracts, schema evolution, validation, error handling, database migrations, backward compatibility, and distributed-system reliability.

• Make and document technical decisions that balance delivery speed, operational risk, maintainability, scalability, and long-term platform direction; contribute to technical roadmaps and modernization efforts.

• Lead design and code reviews, establish practical standards for Python, testing, security, observability, and documentation, and mentor engineers in breaking down complex work and delivering incrementally.

• Improve CI/CD practices and partner with SRE and DevOps on container images, Kubernetes deployments, infrastructure as code, secrets management, environment configuration, deployment verification, and rollback.

• Define production-readiness expectations through service-level indicators, metrics, dashboards, alerts, performance testing, capacity analysis, and resilience testing.

• Lead complex incident investigations, address root causes and corrective actions, and drive systemic risks spanning multiple services, repositories, teams, or environments to resolution.

• Coordinate technical dependencies across internal projects and platforms, working with Network Operations and other users to ensure solutions measurably improve operational outcomes.

Required Qualifications:

• Advanced Python development experience, including structuring, testing, packaging, and operating long-lived backend applications. 

• Experience leading the design or delivery of distributed services, APIs, data platforms, network tools, or automation systems, including asynchronous or event-driven integrations.

• Strong knowledge of relational databases, SQL, data modeling, transaction behavior, indexing, and controlled schema migrations.

• Hands-on experience with Linux, Docker, containerized services, CI/CD pipelines, and automated software-quality and security controls.

• Experience implementing production observability and diagnosing complex problems across application code, infrastructure, databases, messaging systems, and external dependencies.

• Demonstrated ownership of production software through delivery, deployment, monitoring, incident response, and continual improvement.

• Demonstrated technical leadership through architecture, mentoring, project leadership, design reviews, code reviews, or cross-team influence, with the ability to communicate technical decisions and tradeoffs clearly.

Preferred Qualifications:

• Experience developing software solutions within the telecommunications industry, with an understanding of carrier networks, network operations, service assurance, network inventory, provisioning, transport/IP technologies, or telecommunications operational support systems (OSS).
• Experience with FastAPI, Pydantic, SQLAlchemy, Alembic, gRPC, Protobuf, or comparable technologies.

• Experience with NATS, Kafka, RabbitMQ, Redis, or another production messaging platform.

• Experience with Kubernetes, Helm, Terraform, GitLab CI, GitOps, or progressive-delivery tooling.

• Experience with Prometheus, Grafana, OpenTelemetry, Elasticsearch, Loki, VictoriaMetrics, service-level objectives, or advanced performance and resilience testing.

• Experience with network telemetry protocols such as gNMI, SNMP, or NETCONF and integrations with network inventory, alarming, service-assurance, or orchestration platforms.

• Experience processing high-volume operational telemetry or building software for NOC, SRE, infrastructure, network-engineering, or telecommunications environments.

Education And Experience 

• Minimum of seven (7) years of professional software development experience, or equivalent demonstrated experience designing and operating complex production systems.

• Bachelors degree in Computer Science, Information Technology OR equivalent relevant professional experience.

Estimated base salary range: $95,100 - $146,300 USD/annually. 

#LI-Remote

The base pay range shown is a guideline and reasonable estimate for this role. It takes into account the wide variety of factors that are considered in making compensation decisions. Actual compensation offered may vary from the posted range based upon geographic location, work experience, skill level, certifications, and other business and organizational needs. Non- sales roles may be eligible to participate in a discretionary annual incentive plan. Sales roles may be eligible to participate in a sales incentive plan.

Additionally, this position may be eligible for certain benefits, such as health insurance, life insurance, disability retirement plans, paid time off.

The posting will be active for a minimum of 3 days. The active posting will continue to extend by 3 days until the position is filled.

Benefits, Rewards & Wellness

• Excellent Health, Dental & Vision Insurance
• Retirement 401(k) Savings Plan
• Generous paid time off policy including paid parental leave

Zayo is an equal opportunity employer to all protected groups, including protected veterans and individuals with disabilities. If you are an individual with a disability and would like to request a reasonable accommodation as part of the employment selection process, please contact us.

This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.

As part of the application, hiring, onboarding, and/or employment process, Zayo or its affiliates, partners, and vendors may collect, store, and use biometric identifiers and biometric information (collectively, “Biometric Data”), such as fingerprints, facial geometry scans or other unique biological characteristics. Zayo uses CLEAR1, a third-party identity verification service, to verify applicant identity during the hiring process. CLEAR1 may collect Biometric Data, including facial geometry scans and/or other biometric identifiers, to authenticate your identity. Biometric Data will be retained pursuant to CLEAR1’s policies, which can be found here: Zayo will not sell, lease, trade, or otherwise profit from any applicant's or employee's Biometric Data. By proceeding with your application, you acknowledge this disclosure. Prior to any collection of Biometric Data — including through CLEAR — you may be presented with a separate consent form and asked to provide your written authorization in accordance with applicable federal, state, and local laws, including the Illinois Biometric Information Privacy Act (BIPA), the Texas Capture or Use of Biometric Identifier Act (CUBI), and other applicable biometric privacy statutes.