Senior Backend Software Engineer

Senior Backend Software EngineerLocation:BoulderColoradoUnited StatesDepartment:Engineering Apply now Share:About the Role Spire is looking for a Senior Software Engineer to help design, build, and improve the reliable and secure systems that support our satellite and ground infrastructure.This is a hands-on engineering role focused on backend systems, platform engineering, observability, and infrastructure-aware software development. You’ll work closely with software, infrastructure, and cybersecurity teams to implement scalable solutions that support operational reliability and secure engineering practices.We are not looking for a dedicated cybersecurity specialist. Instead, we’re seeking an experienced software engineer who has worked alongside security teams and has experience implementing technical requirements related to security, reliability, and compliance within production systems.This role is best suited to engineers who enjoy solving technically challenging problems and have experience working on complex systems in industries such as aerospace, scientific computing, telecommunications, biotech, robotics, or other high-reliability environments.What You'll Do:Design, develop, and maintain backend services and platform toolingCollaborate with cybersecurity and infrastructure teams to implement secure engineering requirementsContribute to modernising services, container environments, and CI/CD workflowsImprove telemetry, monitoring, logging, and observability across production systemsSupport cloud-based infrastructure and deployment workflows in AWS environmentsParticipate in code reviews, architecture discussions, and engineering best practicesWork across infrastructure, backend systems, and operational tooling in a collaborative engineering environmentWho You Are:Required Qualifications:5+ years of professional software engineering experienceStrong Python development skillsExperience with at least one compiled language such as Rust, C++, Go, Java, or CStrong backend engineering experience building and maintaining production systemsExperience working with AWS-based environments (GCP experience also considered)Experience with containers, CI/CD pipelines, and modern software delivery practicesComfortable working in Linux-based development environmentsStrong understanding of systems engineering, performance, reliability, and operational concernsExperience collaborating with infrastructure and/or cybersecurity teams to implement technical requirementsStrong communication and documentation skillsPreferred Qualifications:Experience working in aerospace, scientific computing, biotech, telecommunications, robotics, or other technically complex industriesExperience in smaller engineering organisations where engineers wear multiple hats across development and operationsFamiliarity with Kubernetes, Terraform, and infrastructure-as-code approachesExperience with PostgreSQL or other relational databasesExperience building observability or telemetry solutions using tools such as Grafana, Databricks, or ElasticsearchFamiliarity with GitHub Actions or modern CI/CD toolingExposure to secure software development or DevSecOps practicesAdvanced academic research background (PhD/Postdoc) in engineering, physics, computer science, or related scientific disciplinesWhat We're Looking For:We value engineers who are:Curious and adaptablePragmatic problem-solversInterested in complex systems and infrastructureOpen to learning new technologies and domainsCollaborative and low-egoComfortable operating in fast-moving engineering environmentsThis role is primarily backend and platform focused. We are generally looking for engineers with stronger backend and systems experience rather than heavily frontend-focused backgrounds.Spire operates a hybrid work model, and this position will require you to work a minimum of three days per week in the office.Access to US export-controlled software and/or technology may be required for this role. If needed,...