Senior Software Engineer (San Francisco Bay Area)

Senior Software Engineer

Build foundational systems behind real‑world decisions

Full‑time · Hybrid- (San Francisco)

$225K–$300K + meaningful equity

The Opportunity

An extremely well‑funded, YC‑backed Series A start-up is building a next‑generation platform that sits at the intersection of data, automation, and high‑stakes decision‑making .

The product is already live, widely used, and growing quickly. The next chapter is about deepening the platform , scaling carefully, and raising the technical bar across systems that must be reliable, explainable, and correct .

This is a role for Senior / Staff engineers who want to work close to the core.

Why This Role Is Different

• Substantial ownership : You’ll take responsibility for meaningful parts of the platform, from design through execution.
• High trust environment : Small, senior team. Few layers. Real autonomy.
• Clear impact : Your work directly influences outcomes that matter to end users and customers.
• Strong compensation : Competitive cash at Series A plus meaningful equity .
• Practical interviews : Real‑world system design and problem‑solving, no algorithm games.

What You’ll Work On

• Core application and platform systems
• Complex backend and data heavy workflows
• Scalable services operating in a regulated or sensitive context
• Accuracy critical logic where edge cases matter
• Cross‑stack problem solving, with a backend leaning focus

The problems are nuanced, the constraints are real, and the solutions need to hold up over time.

Requirements:

You’re likely a strong fit if you:

• Have 8+ years of professional Full Stack software engineering experience – with a Backend Lean
• Have TypeScript, React.js, Node.js, Python - Experience with data driven or intelligent systems is helpful but not required
• Have owned or significantly shaped production systems
• Have experience working on Complex Backend systems at Infrastructure level
• Are comfortable making architectural trade-offs with incomplete information
• Have experience in early‑stage or fast‑moving environments
• Are self‑directed, communicative, and pragmatic
• Prefer building durable systems over shipping throwaway code
• Ideally have some experience with AI/ML – Chatbots/ fine-tuning models etc
• Computer Science Degree is a bonus.

The Environment

• ~30 people total, lean senior engineering team
• Revenue‑generating, well‑capitalized, and growing
• Multiple senior hires planned
• On‑site collaboration in San Francisco

The Bottom Line

This is a role for engineers who want to:

• Own meaningful technical decisions
• Work on systems that actually get used
• Be paid competitively for senior‑level impact
• Build something substantive alongside other strong engineers

A high‑quality opportunity for the right person.

Apply now – Candidates must be US Citizens. No Sponsorship available.