Senior Software Engineer

Sarah Smith Fund; San Francisco (CA); On-site; USD 140,000 - 210,000; Full time

Job summary

Casca is building AGI for banking and is replacing legacy systems with AI-native tech. You will own end-to-end components, balancing high-quality code delivery with stakeholder collaboration to drive product value.

The stack includes TypeScript, React, NextJS, Postgres with Prisma, Python and AWS, requiring 5+ years of SaaS experience and a startup mindset. You’ll contribute ~70% to coding and ~30% to coordination with customers and product managers, while elevating team throughput through code

Qualifications

• 5+ years of software engineering experience in production SaaS environments.
• Startup experience in high-velocity settings with front-to-back ownership.
• Strong web application development with relational databases and clean code quality.

Responsibilities

• Own end-to-end component ownership from scoping to deployment and maintenance.
• Propose pragmatic technical solutions to deliver value quickly while avoiding unnecessary complexity.
• Collaborate with customers and product managers to break down features into actionable tasks.

Skills

Software engineering

SaaS experience

Frontend & Backend

Architecture

Observability & testing

Tools

TypeScript

React

Next.js

PostgreSQL with Prisma

Python

AWS

Job description

Why Casca?

Casca is building AGI for banking. We're replacing decades-old legacy systems with AI-native technology that automates 90% of the manual work humans once had to do.

What you'll do:

Projected Division of Responsibilities: Roughly 70% contributing high-quality code and 30% collaborating with stakeholders and supporting your team.

• Own the Lifecycle: Take deep pride in end-to-end component ownership, from initial technical scoping and architecture to deployment, observability, and long-term maintenance.

• Deliver with Pragmatism: Act as a "master of scope" by understanding the "why" behind features. You will propose technical shortcuts or alternative implementations to deliver core value faster, avoiding "complexity for complexity's sake".

• Collaborate Cross-Functionally: Work tightly with customers and product managers to break down complex features into actionable tasks, proactively surfacing edge cases and technical trade-offs before writing code.

• Elevate the Team: While primarily focused on independent delivery, you will amplify the team’s throughput through rigorous code reviews, sharing best practices, and actively unblocking peers.

• Build for Reliability: Ensure your updates are robust and integrate seamlessly into the broader Casca architecture. You will implement observability and automated testing to ensure your components run reliably in production.

Our tech stack: TypeScript, React, NextJS, Postgres with Prisma, Python, AWS.

What you'll bring:

• Seasoned Expertise: 5+ years of software engineering experience with a proven track record of delivering significant projects in production SaaS environments.

• Startup Resilience: Recent experience (last 2-4 years) in fast-paced, high-velocity environments where you had to "lead from the front" and manage high-stakes trade-offs.

• Technical Mastery: Deep experience in web application development using relational databases and a quality-first mentality that results in clear, efficient, and low-defect code.

• Architectural Maturity: The ability to anticipate scaling challenges without over-engineering, building exactly what is needed for current scale while keeping code adaptable.

• Integrity & Alignment: A commitment to the "honorable businessperson" ideal-prioritizing transparency, honesty, and a "team above self" mentality even when stakes are high.

• Mission Resonance: A purpose-driven mindset that views your work as a "noble cause" to positively impact the lives of end-users.

• Operational Grit: Comfort with ambiguity and the ability to maintain high throughput and "operational resilience" in a rapidly evolving organization.

What you'll get:

• Impact & Ownership: A unique opportunity to shape the future of banking through AI, owning end-to-end product initiatives.

• Collaborative Environment: Work alongside a talented and passionate team that values continuous improvement and knowledge sharing.

• Competitive Compensation: Includes salary, benefits, and potential equity in a fast-growing startup.

• Professional Growth: Access to resources and mentorship to expand your skill set, influence strategy, and accelerate your career.

• Culture of Innovation: We encourage risk-taking, learning from failures, and pushing the boundaries of what's possible in fintech.

As an early-stage company building at the frontier of AI, we work with high intensity and commitment. While schedules can vary by role/team, many weeks will demand extra focus, flexibility and time particularly during major launches and high impact sprints. We're seeking those who are aligned to and able to commit to that expectation.