Core Engineer

TechTree; San Francisco (CA); On-site; USD 120,000 - 210,000; Full time

Job summary

TechTree in San Francisco seeks versatile Core Engineers to design, build, and maintain full-stack systems that integrate with legacy environments and support high-value supply chain operations.

This full-time, in-person role requires delivering robust features end-to-end, organizing multiple projects in parallel, and collaborating with platform and customer-facing teams. New grads are welcome to apply.

Qualifications

• Proven ability to design and build full-stack components.
• Strong SQL with Postgres and complex queries.
• Experience architecting distributed systems.
• Comfortable working with ambiguity and rapid changes.
• Show at least one full-stack project (GitHub repo, web app, or Loom demo).

Responsibilities

• Design, develop, and maintain full-stack application functionality end-to-end.
• Organise, track, and deliver multiple projects in parallel.
• Collaborate with platform and customer-facing teams to integrate with legacy systems.

Skills

Full-stack

SQL/Postgres

System architecture

Fast delivery

Problem solving

Job description

America's industrial base runs on systems built in the 1980s. Billions of dollars in critical components - F-35 parts, industrial assemblies, electronics, bolts, hoses - still move through email threads, Excel sheets, and disconnected ERPs.

We're replacing that with an AI-native platform that makes defense, aerospace, and industrial supply-chain operations nearly autonomous. Faster quoting. Faster procurement. Full visibility. Real operational intelligence for the companies our nation depends on.

Quick facts:

YC W25 company - top 5% growth in batch

Raised $10M+ from Paul Graham, SV Angel, Pear VC, and CRV

Team of 20 co-living in SF & Warsaw Hacker Houses

7-figure ARR transacting ~$50M a week through our system

The role

Our Core Engineers work closely with the platform team and customer-facing forward deployed teams to design, build, and maintain robust full-stack systems that integrate with complex legacy environments and support high-value, high-impact supply chain operations.

Full-time, in-person in San Francisco - this is not a remote role

Design, develop, and maintain full-stack application functionality end-to-end

Organise, track, and deliver multiple projects in parallel

What we're looking for

Absolute grinder - motivated by hard problems, not comfortable processes

Comfortable with ambiguity and rapid change

Track record of shipping fast

Experience architecting systems independently

Motivated by taking an unknown problem, sinking your teeth in, and coming up with a plan of attack

Ready to show at least one full-stack project (GitHub repo, web app, or Loom demo)

Strong knowledge of SQL databases - preferably Postgres; proficient at writing, optimising, and troubleshooting complex queries

Strong understanding of software engineering best practices: version control, testing, documentation

Ability to work effectively in fast-paced, high-accountability environments

Low ego, curious, and intellectually honest - focused on outcomes, not "being right"

Any experience level welcome - new grads considered.

The process

Initial call with engineer - Technical screening - Quick call with founder - Fly out to SF HQ for onsite (on us) - Offer