Software Engineer, Core Platform

As a Staff Software Engineer, Core Platform
, you will be a key technical leader driving the design, architecture, and evolution of Flo Qast’s foundational backend systems. You are a "systems thinker" who will own the development of critical platform capabilities, including our end-to-end data platforms, core services, and robust authentication/authorization frameworks. Working in a high-growth environment, you will define the standards for reliability, security, and scalability, enabling product engineering teams to build seamlessly on top of a powerful, resilient backend foundation.

• Core Platform Architecture: Lead the design and implementation of highly scalable, distributed core services and backend platform components using Type Script and modern cloud-native technologies.
• Orchestration & Messaging: Architect and maintain reliable asynchronous architectures, utilizing event streaming (Kafka) and complex workflow orchestration (Temporal) to power critical business logic.
• Platform Security Systems: Own the evolution and scaling of our enterprise-grade authentication and authorization frameworks, ensuring seamless and secure data access layers.
• End-to-End Data Engineering: Design, optimize, and scale complex backend data platforms and document-based storage systems (Mongo
  
  DB) to handle high-throughput workloads.
• Technical Leadership & Standards: Establish clean coding patterns, robust architectural standards, and best practices for the backend engineering organization while mentoring junior and senior engineers.
• Cross-Functional Influence: Partner closely with Product, Security, and Core Infrastructure teams to align platform capabilities with long-term product roadmaps and strategic company goals.

• 10+ years of software engineering experience with a deep, specialized focus on "pure" backend engineering, distributed systems, and core platform development.
• Expert-level proficiency with Type Script alongside deep production experience within our modern ecosystem stack (Temporal, Kafka, Mongo
  
  DB, and AWS).
• Startup DNA: Proven experience delivering high-impact architectural solutions within fast-paced, high-growth Series B or Series C environments.
• Industry Domain Knowledge: A strong background in the B2B SaaS space, with a track record of building platforms that scale alongside growing enterprise customer demands.
• System Design Expertise: Demonstrated success building complex, end-to-end data pipelines, identity/access systems, and high-availability core services from scratch.
• Clear Engineering Focus: A profile centered squarely on core backend application architecture rather than frontend/full-stack development or infrastructure-heavy/Dev Ops operations.
• Strategic Communicator: An effective collaborator who can easily break down complex architectural technical concepts and influence both technical and non-technical stakeholders.

This job posting is for our Staff Software Engineer, the base pay range for this position is $164,000 - $246,000. Compensation is not limited to base salary. Flo Qast values our Total Rewards, and offers a competitive and elaborate Benefits Package including, but not limited to, Medical, Dental, Vision, Family Forming benefits, Life & Disability Insurance, and Unlimited Vacation. Flo Qast reserves the right to amend, change, alter, and revise pay ranges and benefits offerings at any time.

All applicants acknowledge that by applying to this position you understand that this specific pay range is contingent upon meeting the qualifications and requirements of the role, and for the successful completion of the interview selection and process. It is at the Company's discretion to determine what pay is provided to a candidate within the range associated with the role.

Flo Qast, Inc is committed to operating fair and unbiased recruitment procedures allowing all applicants an equal opportunity for employment, free from discrimination on the basis of religion, race, sex, age, sexual orientation, disability, color, ethnic or national origin, or any other classification as may be protected by applicable law. We aim to recruit the right people for the jobs we have to offer, and to assess applications on the basis of relevant skills, education, and experience.

We welcome people of different backgrounds, experiences, abilities, and perspectives. We are an equal opportunity employer and strive to provide a professional and welcoming workplace for all employees.