Senior Full-Stack Engineer

Arcessio; San Francisco (CA); On-site; USD 180,000 - 230,000; Full time

Job summary

Arcessio in San Francisco is seeking a senior generalist who can own features end to end across the full stack, driving product velocity and delivering production-ready code weekly. You'll take ownership from concept to deployment, collaborate with engineers and business stakeholders to define requirements, and help shape the roadmap while maintaining speed in a lean startup environment.

This role requires in-person presence in San Francisco 3-4 days a week at our co-working space (Friday remote

Qualifications

• U.S. citizenship is required due to government contract requirements.
• In San Francisco, in person - 3-4 days/week at our co-working space (Friday remote optional).
• Startup-pace mindset prioritizes product velocity over stability.
• Strong CS fundamentals - data structures, algorithms, systems design.
• Ability to debug and identify root causes without over-relying on AI.
• Sound judgment with AI tooling to go faster without over-reliance.

Responsibilities

• Build, harden, and deploy features across the entire stack.
• Take ownership of features from start to finish and help elsewhere when needed.
• Help shape and execute the product roadmap and contribute to product intuition.
• Work closely with engineers and interface with the business to understand requirements.
• Help define our engineering process as we grow, shipping to production weekly.

Skills

End-to-end ownership

Full stack development

System design

Strong CS fundamentals

Team collaboration

Job description

We're looking for a senior generalist who can own features end to end across the full stack and move our product forward quickly. This is the role that most directly drives our biggest constraint right now: product velocity.

What you'll do

• Build, harden, and deploy features across the entire stack — data and geometry processing through to the interfaces our customers and internal teams use.
• Take real ownership of features from start to finish, while staying flexible enough to jump in and help anywhere so we're never blocked on a single contributor.
• Help shape and execute the product roadmap, and contribute directly to product intuition — not just implement tickets.
• Work closely with other engineers and interface with the business to understand requirements and priorities.
• Help define our engineering process as we grow, in a team that ships to production weekly.

Must-haves

• U.S. citizenship (required). This role works with sensitive government Controlled Unclassified Information (CUI) and is subject to government contract requirements.
• In San Francisco, in person - 3-4 days/week at our co-working space (Friday remote optional).
• Startup-pace mindset - comfortable prioritizing product velocity over stability while we move fast.
• Strong CS fundamentals - data structures, algorithms, and systems design.
• A real debugging and problem-identification approach - you can find and reason through the root cause yourself, not just produce AI-assisted output.
• Sound judgment with AI tooling - you use AI tools to go faster without over-relying on them.

Domain fit (strongly preferred)

• Experience with 3D analysis, CAD models, the software/hardware interface, or manufacturability. Direct experience is exceptional; strong, genuine interest is acceptable.
• Comfort owning features across every layer of the stack and shipping production code at a fast cadence.

Communication & culture

• You can explain technical work clearly to a non-technical person - this is a key culture-fit signal for us.
• Strong communication, organization, and a thoughtful problem-solving approach.
• You thrive in a lean, high-ownership environment with minimal structure.

Nice to have

• Familiarity with 3D printing and CAD/manufacturing file formats (STL, STEP, OBJ, and friends).
• Exposure to defense or government work - familiarity with secure data environments and procurement-ready outputs is a plus, though not required.

Compensation

• Competitive salary plus equity, benchmarked against well-funded startups.