Principal Software Engineer

Swiftly

. Work with and provide direction to the teams building Swiftly's ads and martech platform .

Posted 11/10/2026full-timeRemote • United StatesLead💰 $220,000 - $228,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in architecting and maintaining large-scale distributed systems, with a strong focus on performance, reliability, and observability. Proficient in Go and Python programming, with experience in cloud environments such as Azure and AWS, and a solid understanding of ad tech and data engineering practices.

Highest-signal resume keywords

Go ProgrammingKotlin DevelopmentAzure Cloud ServicesAd Tech ExperienceCI/CD with GitHub Actions

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

Large-Scale Software ServicesPostgreSQLMicroservices ArchitectureEvent StreamingSchema MigrationsObservability ToolsInfrastructure as CodeData PipelinesAPI FrameworksProduction Code Writing

Soft Skills

LeadershipCollaborationProblem-SolvingOwnershipCommunication

Tools & Technologies

DatabricksAzure FunctionsKubernetesTerraformOpenTelemetryPrometheusGrafanaFastAPIQuarkusAI Coding Agents

Industry Keywords

Ad ServersDSPsCampaign MeasurementMulti-Tenant EnvironmentRetail-Oriented SolutionsSaaSImpression TrackingAttributionGitOps DeploymentIncident Management

Tech Stack

Tools & technologies

AWSAzureDistributed SystemsGrafanaGraphQLJavaKafkaKotlinKubernetesMicroservicesPostgresPrometheusPythonSparkTerraformGo

About the role

Key responsibilities & impact

Work with and provide direction to the teams building Swiftly's ads and martech platform
Architect, code and maintain large-scale distributed systems
Lead incremental migration of campaign authoring and The Trade Desk write path off a Kotlin/Quarkus service without downtime
Own performance and reliability of the Go ad server against strict SLOs
Design data contracts shared between services using schema-as-code, versioned database views, transactional outbox and projector patterns
Partner with data engineering on Databricks pipelines for personalized rankings, identity resolution and impression data feeding attribution and iROAS
Build safe, auditable integrations with The Trade Desk GraphQL API, Salesforce and creative-rendering services
Utilize microservices architecture and database design expertise
Operate production services, including on-call and incident management
Contribute to a multi-tenant platform architecture
Guide migration from AKS with ArgoCD and Kustomize toward Azure Container Apps and Azure Functions
Set the engineering quality bar through typing, linting, testing, security scanning, release automation and AI-assisted development
Take ownership from architectural decisions through coding, testing and operations
Perform other related duties as assigned

Requirements

What you’ll need

Bachelor of Science in Computer Science, Computer Engineering, Mathematics or a related field or comparable industry experience
10+ years of industry experience designing, building, and maintaining large-scale software services, ideally in a multi-tenant environment
Confidence writing production code in Go and Python, and working in Kotlin or Java services
Expertise with PostgreSQL, Kubernetes, event streaming such as Azure Event Hubs or Kafka, and API frameworks such as FastAPI or Quarkus
Experience building and running services on Azure and/or AWS
Experience building low-latency, high-throughput services against defined SLOs, with observability through OpenTelemetry, Prometheus, Loki, Pyroscope and Grafana
Experience with CI/CD in GitHub Actions, GitOps deployment and infrastructure as code such as Terraform
Ad tech experience: ad servers, DSPs such as The Trade Desk, impression tracking, and campaign measurement or attribution
Experience with Databricks or Spark data pipelines
Experience with Atlas schema migrations, SQLAlchemy/SQLModel or pgx, and Azure Functions or Container Apps
Experience using AI coding agents in daily development
Applicants must be authorized to work in the U.S. without the need for current or future sponsorship
Preferred: experience with retail-oriented solutions and SaaS
Preferred: mix of startup and large software company experience

Benefits

Comp & perks

Full-time remote work
Equal Employment Opportunity and Affirmative Action Employer
Reasonable accommodations for qualified individuals with disabilities throughout the application process