Senior Fullstack Engineer

Bastion enables financial institutions and enterprises to issue regulated stablecoins, generate revenue on reserves, and expand their ecosystems. Bastion’s platform combines stablecoin issuance, secure custody, and seamless orchestration for cross-border transfers, on/off-ramps, and stablecoin conversions. With Bastion’s platform and APIs, businesses can create and scale their stablecoin network, while optimizing revenue, compliance, and control.

You can check out our Guide for Candidates here to learn more about our work.

Instead of a list of requirements, we want to give you a directional look into the first 30, 90, and 180 days on the job.

We are a startup, so the pace is fast and the specific work will change. You need to be okay with that.

If you think this is something you can handle, we will be excited to speak with you.

Our team is distributed, with a hub in New York City. For this role, we are open to candidates in the United States.

• Ramp on our full-stack architecture: backend services, frontend applications, APIs, and data flows

• Ship a small feature end-to-end: backend endpoint, frontend UI, and database schema change

• Fix bugs across the stack and improve test coverage for the code you touch

• Outcomes

  • Multiple features or bug fixes shipped to production with quality

  • You understand how data flows from frontend to backend to database

  • You can navigate our codebase and development workflow confidently

• Take ownership of a feature area: user dashboard, transaction flows, admin tools, or API integrations

• Lead a medium-scope project: building a new workflow, integrating a third-party service, or redesigning a key user experience

• Improve system quality with better error handling, validation, observability, and user feedback

• Outcomes

  • A delivered feature that improves user experience or enables new business capabilities

  • You're a go-to person for your feature area

  • Measurable improvements in reliability, performance, or user satisfaction

• Lead a cross-functional initiative: new product capability, platform redesign, or major integration

• Shape technical direction with design docs, architecture proposals, and mentoring team members

• Partner with product, design, and compliance teams to make pragmatic tradeoffs on user experience, performance, and regulatory requirements

• Outcomes

  • A multi-sprint delivery that unlocks significant user or business value

  • Clear before/after improvements in user metrics, system performance, or developer velocity

  • Patterns and components that enable the team to ship faster and better

• Building secure, performant APIs for stablecoin issuance, custody, and transfers

• Creating intuitive user interfaces for complex financial workflows with real-time updates and clear error handling

• Implementing transaction monitoring dashboards with filtering, sorting, and export capabilities

• Designing and building admin tools for compliance, user management, and operational support

• Integrating third-party payment rails, banking APIs, and blockchain networks

• Optimizing database queries and API responses for sub-second latency at scale

• Building robust form validation, authentication flows, and permission systems

• Implementing real-time notifications and status updates across frontend and backend

• Languages: Go and TypeScript/Node.js; some services in Rust as needed

• Backend: Go microservices with gRPC and REST APIs

• Frontend: React, Next.js, TypeScript

• BFF Layer: GraphQL and tRPC for backend-for-frontend services

• Data: Postgres (RDS), Redis, Kafka, Snowflake

• Workflow Management: Temporal

• Security: AWS Nitro Enclaves for hardware-backed key isolation, IAM policies, secrets management

• Infrastructure: AWS (ECS, EKS, Lambda), Kubernetes, Docker, Terraform

• Observability: Datadog, Grafana, Sentry, CloudWatch

• Incident Management: Incident.io

Bastion 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.