Senior Software Engineer

Senior Software EngineerBastion builds regulated financial infrastructure for modern businesses. Bastion's full stack product suite covers stablecoin issuance, custodial wallet infrastructure, and global asset conversion rails, with the flexibility to deploy individual capabilities or combine them end-to-end.Bastion's regulated foundation underpins a compliance-first approach to risk management, ensuring the integrity and security of all financial activity within its systems. Bastion holds the appropriate licenses for its own operations, but can also act as a service provider, offering compliance and financial operations support under our customers' licenses.We are looking for a Senior Software Engineer to join our engineering team and build the core infrastructure that powers our stablecoin platform. In this role, you'll design and ship services that handle custody, transfers, issuance, and compliance workflows—systems that process real money and require exceptional reliability and security.You'll work within one of our product verticals (Custody, On/Off Ramps, Issuance, or Shared Services), collaborating closely with product managers, compliance, and other engineers. Our teams are small and cross-functional, which means your work ships fast and has direct impact on customers and partners.This is an opportunity to build financial infrastructure at a 30+ person company where ownership is real. We expect engineers to take initiative. Whether that's shipping features, improving observability, or strengthening the codebase. If you want to work on hard problems in a regulated domain where your contributions matter immediately, we'd love to talk.First 30 Days: Learn The Rails, Ship ConfidentlyRamp on service architecture, CI/CD, observability, and engineering conventionsShip a small feature slice or quality-of-life improvement in one serviceAdd tests, dashboards, or runbook notes for the areas you touchBuild relationships with your vertical team and cross-functional partnersOutcomes Multiple safe production deploys with follow-up verificationYou can run core services locally and trace requests through logs/metricsUpdated documentation and/or PRs that improve onboarding in your areaBy 90 Days: Own A Service Surface And Raise The BarTake ownership of a service or capability across our product, with an eye toward production-readinessLead a medium-scope project: updating an API contract, implementing a partner integration, or improving robustness of a critical pathStrengthen reliability with better logging, tracing, alerts, and failure handlingOutcomes A delivered feature or refactor that improves a product metric, SLO, or developer ergonomicsYou're a go-to person for your service domainBy 180 Days: Drive Cross-Service ImpactLead a cross-service initiative, such as an API versioning plan, a data model migration, or a compliance-driven workflow changeShape technical direction with design docs and mentoringPartner with product and compliance to make pragmatic, regulation-aware tradeoffsOutcomes A multi-sprint delivery that simplifies the system and unlocks product velocityClear before/after reliability or performance improvementsDocumentation and designs that help others ship faster and saferSome Challenges You Might TackleDesigning stable, evolvable APIs for custody, transfers, or issuance without breaking downstream clientsBuilding idempotent job flows for high-throughput transfers with strong audit trailsHardening key operations using hardware-backed isolation and robust key policiesImproving p95 latency through query tuning, caching, or backpressure strategiesNavigating tradeoffs between product velocity and compliance requirements in a regulated environmentBuilding services that integrate with banking partners and crypto infrastructure providersYour Team's Typical StackLanguages: Go and TypeScript/Node.js; some services in Rust as neededService patterns: gRPC and REST; GraphQL/tRPC at the edge for frontend BFFsData and async processing: Postgres, Redis, KafkaWorkflow Management: TemporalInfra: AWS, containers, Kubernetes, Terraform; hardware-backed key isolation with Nitro Enclaves for sensitive operationsObservability and ops: Datadog, Grafana, Sentry, Incident.ioBastion provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws. This policy applies to all terms and conditions of employment, including recruiting, hiring, and placement. Bastion participates in E-Verify to authorize eligibility of employment in the United States.