Founding Engineer - Remote)

SIVAD Consulting; United States; Remote; USD 180,000 - 240,000; Full time

Job summary

Abacus is seeking a Founding Engineer to build a tax-automation platform as a generalist, primarily backend with some frontend work. This remote role targets 2-7 years of software experience in a fast-moving startup environment and expects strong Python expertise alongside TypeScript familiarity.

You will own backend architecture decisions, ship a major relaunch next year, and develop LLM/OCR pipelines to transform client input into product features.

Qualifications

• 2-7 years of software engineering experience.
• Strong Python skills; TypeScript is a strong plus.
• Experience shipping LLM or agent-based features to production.
• Experience owning backend architecture decisions.
• Experience at a venture-backed startup (Seed through Series B) is preferred.
• CS degree from a Top-50 US university with a strong GPA.

Responsibilities

• Build the core tax-automation platform as a generalist: backend-first, with some frontend.
• Help ship the next major version and relaunch planned for early next year.
• Make backend architecture decisions in collaboration with the CTO and Head of Engineering.
• Build LLM and OCR agent pipelines and convert firm feedback into product.
• Work on new tax and accounting workflow products, such as audit.

Skills

Python

TypeScript

Education

CS degree from Top-50 US university

Job description

Founding Engineer – Remote (Ab-Intel)

Salary Range: 180k to $240k

We are looking for a Founding Engineer with 2-7 years of experience to help build AI agents that automate tax preparation for the largest accounting firms in the US. Abacus is profitable, has passed seven figures in revenue in under a year, and is live in 11 of the top 100 firms. We want a high-bar generalist who makes sharp backend decisions and wants to help scale a product that customers already pay for.

Responsibilities

• Build the core tax-automation platform as a generalist: mostly backend, with some frontend
• Help ship the next major version of the product, a big relaunch planned for early next year
• Make backend architecture decisions on your own, working closely with the CTO and Head of Engineering
• Build our LLM and OCR agent pipelines and turn what firms tell us into product
• Work on new products in tax and in other accounting workflows, such as audit

Key Requirements

• Strong Python skills; TypeScript is a strong plus
• Hands-on experience making backend architecture decisions
• Experience at a venture-backed, fast-growing startup (Seed through Series B) is strongly preferred; long tenures at big tech or slow enterprises are a negative signal
• CS degree strongly preferred (Math or Physics also considered) from a top-50 US school, ideally with a strong GPA
• A builder mindset with high ownership and urgency; side projects and 0-to-1 work are a plus

Work experience

• Experience building 0 to 1 at early-stage, venture-backed startups (Seed to Series B, Y Combinator) or as a founding engineer
• Proficiency in Python and TypeScript
• 2 - 7 years of experience as a software engineer
• Has owned features from design to production
• Experience shipping LLM or agent-based features to production
• Owned backend architecture decisions (classic systems, with LLM features on top)

Nice-to-have

• Experience with document extraction or data pipelines at scale

Education

• CS or related technical degree from a Top 50 US university