Senior Solutions Architect

fastn, Inc.; United States; Remote; USD 160,000 - 230,000; Full time

Job summary

Fastn is enabling SaaS companies to connect with customers’ environments using an AI-powered, embedded integration platform. You will design and implement high-performance integrations, working with engineering, product, and customer success teams to ensure scalable, secure solutions.

As a Senior Solutions Architect, you’ll guide customers through API strategies, provide PoCs, and drive automation while ensuring compliance and performance at scale.

Qualifications

• Strong API architecture background with REST/GraphQL experience.
• Backend development in Java, Python, or Node.js.
• Cloud platform expertise and serverless architecture familiarity.
• Know-how in API security and compliance (SOC 2, GDPR).
• Experience with high-scale, low-latency designs.

Responsibilities

• Design scalable integration architectures for customers.
• Provide technical guidance and best practices for APIs.
• Develop PoCs and demonstrate capabilities to customers.
• Collaborate across engineering, product, and success teams.
• Mentor junior engineers and contribute to docs.

Skills

API architecture

RESTful APIs

GraphQL APIs

Event-driven integration

Java

Python

Node.js

Cloud platforms

Security best practices

iPaaS familiarity

Communication skills

Tools

AWS

GCP

Azure

OAuth/JWT/OpenID

Job description

Senior Solutions ArchitectLocation: RemoteType: Full-time

About FastnFastn is on a mission to revolutionize how SaaS companies connect with their customers' environments. Powered by AI, we provide an embedded integration infrastructure that enables SaaS businesses to build, scale, and manage their integration ecosystem effortlessly.

With the company, companies can launch strategic integrations, create their own app marketplace, and unlock new revenue streams by offering seamless connectivity with the tools their customers already use. But our platform is more than just integrationsit’s about accelerating market penetration, driving partner-sourced revenue, and delivering smarter, more valuable customer experiences.

If you’re passionate about bridging the gap between technology, business, and customer success in a high-scale SaaS environment, the company is the place to be.

What You’ll Do

As a Senior Solutions Architect, you will serve as a technical expert and strategic partner for customers, helping them design and implement seamless integrations using the company’s AI-powered platform. You will work closely with engineering, product, sales, and customer success teams to ensure that customers can effectively leverage the company to build high-performance, scalable integration solutions.

Your Responsibilities

• Design and Architect Scalable Solutions: Work with customers to understand their business needs and design high-performance, scalable integration architectures.
• Provide Technical Guidance: Act as a trusted advisor to customers, guiding them on API best practices, data flow architecture, and integration strategies.
• Develop Proof of Concepts: Build and demonstrate proof-of-concept (PoC) integrations, showcasing the company’s capabilities and assisting customers in implementation.
• Optimize for Scalability and Performance: Design solutions that handle millions of transactions per second/minute with sub-millisecond latency.
• Drive API and Automation Excellence: Assist customers in leveraging the company’s APIs, AI-powered automation, and smart connectivity features.
• Ensure Security and Compliance: Implement best practices for API security, authentication (OAuth, JWT, OpenID), and compliance (SOC 2, GDPR, etc.).
• Collaborate Across Teams: Partner with engineering and product teams to provide customer feedback and contribute to product improvements.
• Educate and Enable: Train customers, partners, and internal teams on best practices for using the company’s integration platform effectively.
• Mentor and Lead: Share best practices, mentor junior solution engineers, and contribute to documentation and technical leadership.

Must-Have Skills & Experience

• Strong background in API architecture, RESTful & GraphQL APIs, and event-driven integrations.
• Hands-on experience with backend development in Java, Python, or Node.js.
• Expertise in cloud platforms (AWS, GCP, or Azure) and serverless architectures.
• Knowledge of API authentication, security best practices (OAuth, JWT, OpenID), and compliance (SOC 2, GDPR, etc.).
• Experience designing solutions that handle high-scale, low-latency transactions.
• Familiarity with iPaaS platforms (Mulesoft, Workato, Tray.io, etc.) and automation workflows.
• Strong communication skills with the ability to explain complex technical concepts to both technical and non-technical stakeholders.

Nice-to-Have Skills

• Experience with AI-driven automation and API intelligence.

• Background in B2B SaaS integrations and developer tooling.

• Knowledge of event-driven architectures, message queues (Kafka, RabbitMQ, etc.), and real-time data processing.

• Hands-on experience with low-code and no-code integration platforms.

Why Join the company?

Shape the Future of SaaS Connectivity Define how SaaS companies scale their integration ecosystems.Work on Cutting-Edge AI & API Technologies Solve complex connectivity challenges using AI-powered automation.High-Impact, Strategic Role Directly influence customer success and the company’s technical strategy.Strong Engineering Culture Collaborate with world-class engineers solving large-scale technical challenges.Competitive Compensation Market-leading salary, meaningful equity, and a flexible remote work environment.Join Us in Building the Future of SaaS Connectivity!

What We’re Looking For

We’re looking for a highly skilled and customer-facing technical leader who excels at designing scalable SaaS integration architectures. If you thrive at the intersection of technology, business strategy, and customer success, this role is for you.