Note: The job is a remote job and is open to candidates in USA. Fastn is on a mission to revolutionize how SaaS companies connect with their customers' environments. As a Senior Integration Engineer, you will play a critical role in architecting, building, and optimizing integrations between Fastn and a broad ecosystem of SaaS applications, leading integration initiatives and mentoring engineers to drive seamless, scalable, and high-performance integrations.
Responsibilities
- Lead the architecture, design, and development of integrations, ensuring they are scalable, high-performance, and secure
- Design and implement robust RESTful, GraphQL, and Webhook-based APIs to enable seamless data flow
- Architect integrations to handle millions of transactions per second/minute with sub-millisecond response times
- Utilize AI/ML-based automation and data mapping to enhance connectivity and reduce manual effort
- Implement best practices for OAuth, API authentication, data privacy, and regulatory compliance (SOC 2, GDPR, etc.)
- Partner with engineering, product, and customer success teams to ensure integrations align with business and technical goals
- Mentor junior engineers, conduct code reviews, and provide technical guidance to elevate the overall integration team
- Establish observability, error handling, and performance monitoring to ensure integration reliability
Skills
- 5+ years of experience in integration engineering, API development, or automation
- Proven track record in leading and architecting scalable API integrations
- Strong expertise in RESTful APIs, GraphQL, Webhooks, and event-driven architectures
- Experience designing integrations that handle millions of transactions per second/minute with low latency
- Proficiency in backend programming languages (Java, Python, or Node.js)
- Hands-on experience with cloud platforms (AWS, GCP, or Azure) and serverless architectures
- Strong knowledge of API security, authentication (OAuth, JWT, OpenID), and compliance (SOC 2, GDPR, etc.)
- Experience working with message queues (Kafka, RabbitMQ, etc.) and event-driven architectures
- Previous experience leading or mentoring engineers in a high-growth startup or SaaS company
- Experience with iPaaS platforms like Mulesoft, Workato, or Tray.io
- Familiarity with AI/ML-driven automation in integrations
- Hands-on experience with developer tooling, B2B SaaS integrations, or API marketplaces
Benefits
- Market-leading salary
- Meaningful equity
- A flexible remote work environment
Company Overview