---
title: 'Mid-Level Full Stack Engineer - Backend Focused at Ansa'
canonical: 'https://feeny.ai/job/mid-level-full-stack-engineer-backend-focused-ansa-san-francisco-2qbg45ee3cdf'
type: 'job'
last_seen: '2026-09-11'
---

# Mid-Level Full Stack Engineer - Backend Focused at Ansa

- **Company:** Ansa
- **Location:** San Francisco, CA
- **Posted:** 2025-02-07
- **Last confirmed live:** 2026-09-11
- **Apply:** https://job-boards.greenhouse.io/ansa/jobs/4505571008

## Job description

It’s time that payments work for merchants, not the other way around. Ansa is building a branded wallet solution to increase customer retention and unlock new growth opportunities.

Ansa helps innovative and growing companies by providing an enterprise-grade, white-label stored value wallet platform paired with incentive tooling. Our platform enables our customers to turn stored value and loyalty programs into a powerful growth engine that increases customer retention, drives repeat purchases, and boosts margins, all without the cost and complexity of building it in-house.

We’re seeking a Backend Engineer who wants end-to-end ownership of core backend systems and the chance to have an outsized impact on a product used by fast-growing consumer brands. You’ll make meaningful architectural decisions and work closely with leadership to influence both product and technical strategy. Does this sound like you? Let's chat!

🤔 What you will be doing?

- Scale our core ledger that tracks both digital and physical money movement.
- Scale our card network integrations that power in-store payments.
- Build and maintain complex reconciliation infrastructure to make sure we never lose a cent across our partner bank, payment processors, merchants, and card networks.
- Build and scale our financial reporting & accounting integrations that allow our merchants to close their books seamlessly.
- Design and maintain our payment APIs and SDKs that make for frictionless integration.
- Design and build features that prime us for enterprise-readiness, including SSO and RBAC.
- Design and ship products that help merchants drive end-user adoption and engagement, creating a flywheel of user spend (i.e. our incentives engine and analytics).
- Scale up our cloud infrastructure as we move towards fully containerized, blue-green deployment.
- Own end-to-end design, implementation, and release of features.
- Design and implement engineering processes.
- Prototype new ideas and iterate towards the ideal user experience.
- Contribute to our engineering infrastructure.
- Help grow our engineering team 🎉

👋🏼 About you

- You have 2+ years of experience independently owning and driving scalable, impactful projects end to end.
- Based in the SF Bay Area (or willing to relocate!) and excited about working closely in-person with a tight-knit team.
- Innately curious and brave enough to consider new payment paradigms or verticals for applications, can navigate low information environments.
- Execution oriented, excited by the high-ownership nature of joining a team at this stage.
- Interested in building a top class engineering culture from the ground up.
- Appreciates and looks for elegant solutions but understands trade-offs of robust designs/engineering vs. moving fast.
- Experience building fast, reliable cloud applications.

😊 Nice to haves

- Operated at a growth stage startup before.
- Familiarity with Golang web frameworks, AWS, Postgres.
- Experience in building one of these areas: core ledgers, money movement platforms/services, and merchant facing APIs for in-app/online POS.
- Bonus points if you have experience in mentoring other team members, and have previously worked closely with designers.

🎉 Our culture

We’re a small team with a big mission. That means we have to hold ourselves to a high bar, by design. With limited resources and high ambition, excellence in quality, communication, and ownership, ambition isn’t optional — it’s how we move forward.

- Ownership — if you see it, you take it. We don’t wait to be told.
- Nosiness — curiosity across boundaries, asking questions, stepping beyond scope to solve problems.
- High agency — proactive and self-directed. You move the work, not the other way around.
- Accountability — we do what we say, and communicate proactively
- Relentless drive — we work with focused intensity and follow through, even when it’s hard.
- Thoughtful execution — shipping work that’s not just fast, but intentional. Think about how decisions today will affect us down the road.
- Pride in your craft — we sweat the details and take our work personally, because it reflects who we are.
- Kindness and trust — we give each other respect, empathy, and the benefit of the doubt. We assume good intent and act like teammates.

🥞 Benefits

- Stellar health, dental, vision insurance coverage, including fertility benefits and One Medical.
- Unlimited PTO and observed local holidays.
- We also offer 401(k), healthcare FSA, and dependent care FSA to fit your needs.

## About Ansa

## Company Overview
- **One-liner**: Ansa is developing an enzymatic DNA synthesis platform to write long, high-fidelity genes from scratch, dramatically accelerating biotechnology research and manufacturing.
- **Entity Type**: Private (Series A)
- **Headquarters**: Emeryville, California, USA
- **Founded**: 2018
- **Founders**: Daniel Lin-Arlow, Sebastian Palluk

## Core Business
- **Primary industry**: Synthetic Biology / Biotechnology / DNA Synthesis
- **Target customers**: B2B – life sciences researchers, biopharma companies, synthetic biology firms, diagnostics and therapeutics developers, and bio-manufacturing organizations.
- **Mission statement**: "Revolutionize the way we make DNA."

## Products & Services
- **Custom DNA Synthesis (Enzymatic)**: Ansa’s core service produces long, complex, high-fidelity DNA sequences using a proprietary enzymatic process (published in *Nature Biotechnology*). This is a **service** offering that replaces traditional chemical-based gene synthesis, enabling faster turnaround and access to sequences that are difficult or impossible to synthesize chemically.

## Market Standing
- **Valuation**: Not publicly disclosed.
- **Key Metric (Funding)**: Ansa has raised a total of **$28 million** in known funding (Seed + Series A).
- **Notable Investors/Partners**: Lead investors include **Felicis Ventures** and **Northpond Ventures**. Other backers include **Hummingbird Ventures** and **Civilization Ventures**.
- **Growth Signals**: The company has moved from R&D into commercial production, recently launching its first custom gene synthesis service. It is actively scaling manufacturing through automation and process engineering (as evidenced by a new "Senior Director, Technical Operations & Automation" role). The technology was validated by publication in a top-tier scientific journal (*Nature Biotechnology*).

## Competitive Advantages
- **Enzymatic Moat**: Unlike nearly all competitors that use chemical (phosphoramidite) synthesis, Ansa uses an engineered template-independent DNA polymerase to build DNA. This enzymatic approach enables the synthesis of longer, more complex sequences with fewer errors, addressing a key bottleneck in the industry.
- **Hard Tech + Biology**: The platform is a deep integration of molecular biology, protein engineering, and custom instrumentation, creating a significant barrier to replication.
- **Founding Team Expertise**: The founders are domain experts who developed the core technology at the Joint BioEnergy Institute (JBEI) and UC Berkeley.

## Strategic Focus
- **Scale & Commercialization**: Ansa’s current priority is scaling its manufacturing capacity from R&D to industrial production. This includes building lab automation, process engineering teams, and QA/ISO readiness.
- **Product Expansion**: The company is expanding its product management and commercial teams to bring its enzymatic synthesis service to a broader customer base in therapeutics, diagnostics, and bio-manufacturing.
- **Automation & Data**: A strong focus on informatics (Bioinformatics Data Scientist role) and instrument control software to drive yield, reduce cost, and optimize the synthesis process.

## Why Work Here
- **High-Impact Mission**: Employees directly enable the next generation of biotech solutions for climate change, healthcare, and food security.
- **Culture Values**: The company emphasizes **innovation** (rigorous engineering), **collaboration** (transparency, humility), and **care** (kindness, respect, high-trust environment).
- **Location & Policy**: Based in Emeryville, CA (San Francisco Bay Area). Roles are primarily **in-office**, with some hybrid flexibility noted for certain positions.
- **Compensation & Benefits**: Competitive base salaries, stock options, comprehensive medical/dental/vision for employees and dependents, 401k, flexible vacation, and parental leave.
- **Team Size**: Approximately 94 employees, offering a tight-knit, cross-disciplinary environment (biology, chemistry, software, hardware, engineering).

## Sources
1. [ansabio.com](https://ansabio.com/company/careers/)
2. [job-boards.greenhouse.io](http://job-boards.greenhouse.io/ansabiotechnologies)
3. [builtin.com](https://builtin.com/company/ansa-biotechnologies/jobs)

## Other roles at Ansa

- [Implementation Manager](https://feeny.ai/job/implementation-manager-ansa-san-francisco-jrwgxztpeba5) — San Francisco, CA
- [Customer Success Manager](https://feeny.ai/job/customer-success-manager-ansa-san-francisco-0k3wgy5kx2kh) — San Francisco, CA
- [Full Stack Engineer - Backend Focused](https://feeny.ai/job/full-stack-engineer-backend-focused-ansa-san-francisco-9fnt4e6q2pg8) — San Francisco, CA
- [Engineering Manager](https://feeny.ai/job/engineering-manager-ansa-san-francisco-06pk81fe1xx8) — San Francisco, CA