Senior Backend Engineer

Job overview

The Senior Backend Engineer role is based in San Francisco, CA, with a remote-friendly workplace and offices in San Francisco and Toronto. Remote engineers are expected to travel periodically for in-person collaboration. The base salary is $190,000–$300,000 per year, with founding-level equity. The role joins an early-stage AI startup’s founding engineering team through PEPOLTek’s partner engagement. The engineer owns customer-facing product features and backend systems, including LLM agents that work with organizational data. The role shapes product direction and engineering standards while helping the founding team deliver and scale client engagements.

What you'll do

• Own product features from scoping through production
• design and ship LLM agents
• make architecture, data modeling, API, and tooling decisions
• lead high-impact projects autonomously
• shape product direction with the founding team
• support client engagements.

What we're looking for

Skills & competencies

senior backend engineer

backend engineering

python

llm agents

agentic ai

rag

apis

san francisco ca

remote-friendly

periodic travel

$190k–$300k

founding-level equity

Work arrangement

• Weekend coverage required

Benefits & perks

• Founding-level equity.

Why this role

Founding-level role; remote-friendly with periodic travel for in-person collaboration; current US or Canadian work authorization required without employer sponsorship.

About the employer

PEPOLTek LTD is hiring for this role. Industry: Custom Computer Programming Services. Sector: 54.