---
title: 'Senior/Principal Scientist, Translational Biomarkers at NewLimit'
canonical: 'https://feeny.ai/job/senior-principal-scientist-translational-biomarkers-newlimit-south-san-francisco-d7dtz5qkay5a'
type: 'job'
last_seen: '2026-09-11'
---

# Senior/Principal Scientist, Translational Biomarkers at NewLimit

- **Company:** NewLimit
- **Location:** South San Francisco, CA
- **Posted:** 2026-04-17
- **Last confirmed live:** 2026-09-11
- **Apply:** https://job-boards.greenhouse.io/newlimit/jobs/5969886004

## Job description

## About NewLimit

NewLimit is a biotechnology company working to radically extend human healthspan. We’re developing medicines to treat age-related diseases by reprogramming the epigenome, a new therapeutic mechanism to restore regenerative potential in aged and diseased cells. We leverage functional genomics, pooled perturbation screening, and machine learning models to unravel the biology of epigenetic aging and disease using experiments of unprecedented scale.

This Position

NewLimit is seeking a Senior/Principal Scientist with deep expertise in molecular biology and translational biomarker assay development. In this role, you will lead the discovery, development, and qualification of pharmacodynamic (PD) biomarker assays that characterize the biological activity of our mRNA-LNP medicines in preclinical and IND-enabling studies. You will serve as a technical leader within our bioanalytical function, shaping PD biomarker strategy from discovery through fit-for-purpose qualification to advance our therapeutic programs toward clinical milestones.

## What you’ll do

- Discover pharmacodynamic biomarkers to support the clinical development of drugs across multiple programs
- Own the design, development, and qualification of PD biomarker assays across various platforms to support preclinical studies
- Define go/no-go criteria for biomarker advancement and contribute to the PD biomarker strategy in regulatory submissions
- Drive data analysis, interpretation, and reporting for bioanalytical studies
- Contribute to sample processing workflows including tissue harvesting, primary cell culture, and complex matrix handling
- Mentor research associates, establish SOPs, and build institutional knowledge within the bioanalytical function

## Requirements

- PhD in molecular biology, biochemistry, cell biology, or a related field or equivalent industry experience (5+ years)
- 3+ years of hands-on experience in various quantitative bioanalytical assay platforms (e.g., RT-qPCR, ddPCR, ELISA, MSD, Olink, SOMAscan, NGS-based methods) in complex biological matrices (serum, plasma, tissue homogenates)
- Strong working knowledge of bioanalytical method qualification/validation principles for PD biomarker measurements, including familiarity with ICH M10 guidelines and fit-for-purpose frameworks
- History of delivering results for bioanalytical projects -- you've discovered a PD biomarker or built an assay and solved all the problems along the way
- Experience with primary cell culture and tissue-derived sample workflows

## Nice to have

- Experience in bioanalytical method transfer and CRO management for outsourced discovery or assay qualification work
- Familiarity with preclinical drug development timelines and regulatory submissions (IND, TGA, CTD format)
- Experience in LNP-RNA biodistribution and PD assay development
- Experience developing products in emerging therapeutic modalities (gene therapy, nucleic acid therapies, cell therapy)

## Benefits

NewLimit provides generous benefits so our team can remain focused on our mission:

- Comprehensive Health, Dental, and Vision insurance
- 401(k) plan with company match
- Paid parental leave
- Industry-leading PTO: 20 days per year plus holidays
- On-site meals and snacks

Salary Range: $155,000 to $200,000. Compensation for the role will depend on a number of factors, including a candidate’s qualifications, skills, competencies, and experience. NewLimit offers a competitive benefits package, which includes a 401k, healthcare coverage, and 20 days of PTO. Learn more at: https://www.newlimit.com/careers   *This compensation and benefits information is based on Company's good faith estimate as of the date of publication and may be modified in the future.

## About NewLimit

## Company Overview
- **One-liner**: NewLimit is a biotechnology company developing epigenetic reprogramming medicines to radically extend human healthspan by reversing cellular aging.
- **Entity Type**: Private (Series B)
- **Headquarters**: South San Francisco, California, United States
- **Founded**: 2022
- **Founders**: Jacob Kimmel (Co-founder & President), Brian Armstrong (Co-founder), Blake Byers (Co-founder)

## Core Business
- **Primary industry/industries**: Biotechnology, Epigenetic Reprogramming, Longevity Therapeutics, Drug Discovery
- **Target customers**: B2B (pharmaceutical partners, clinical development), B2C (ultimately patients with age-related diseases)
- **Mission or purpose statement**: To radically extend human healthspan by creating the first medicines that reverse cellular aging at the epigenetic level.

## Products & Services
- **Discovery Engine**: An AI-powered platform that designs epigenetic payloads to make old cells look and act young. It tests thousands of designs simultaneously using genomics and retrains models iteratively on new data.
- **Therapeutics (Pipeline)**: Medicines focused on restoring youthful function in the liver, immune system, and vasculature. Initial programs target diseases resembling accelerated aging, with the goal of restoring youthful metabolism, energy levels, resilience to disease, and cognition.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed
- **Key Metric**: Total Funding of **$215M** (across three rounds); Annual Revenue estimated at **$12.8M** [linkedin.com](https://linkedin.com/company/newlimit)
- **Notable Investors/Partners**: Kleiner Perkins (led Series B), Valor Equity Partners, Quiet Capital, S32, Duke University Management Company, Liberty Mutual Investments, Fred Ehrsam, Elad Gil, Joe Lonsdale, Eric Schmidt, Garry Tan, Brian Armstrong, Blake Byers [newlimit.com](https://www.newlimit.com/company)
- **Growth Signals**: 44 employees (+40.5% YoY), 12 active job postings (+100% YoY), LinkedIn followers grew 157.6% in the past year, and the company closed a $130M Series B in May 2025 led by Kleiner Perkins [linkedin.com](https://linkedin.com/company/newlimit).

## Competitive Advantages
- **Proprietary AI Platform**: A frontier intelligence system that designs, tests, and retrains models on epigenetic reprogramming at unprecedented scale.
- **Scientific Moats**: Deep expertise in epigenetic reprogramming (a validated but complex mechanism for reversing cellular age); a team with backgrounds from Calico, UCSF, and Stanford.
- **Founding Team & Backing**: Co-founded by Brian Armstrong (CEO of Coinbase) and Blake Byers (early investor in OpenAI, Anthropic, Neuralink), providing deep capital access and a culture of ambitious, long-term execution.

## Strategic Focus
- **Current priorities**: Advancing pipeline programs into the clinic (Head of Clinical Development role is open); scaling the Discovery Engine; building the team across computational biology, immunology, and manufacturing.
- **Direction for growth**: Transition from a discovery-stage R&D company to a clinical-stage therapeutics company; generating large revenue streams to fund the mission; expanding into new cell types and disease areas.

## Why Work Here
- **Culture**: "Not for the faint of heart" — a high-performance, mission-focused team. No pure management roles; everyone executes. Values include safety then speed, clear communication, inherent optimism, independent thinking, and top talent in every seat [newlimit.com](https://www.newlimit.com/careers).
- **Remote/Hybrid/Office**: Likely on-site/hybrid given the lab-based nature of the work (headquarters in South San Francisco).
- **Notable Perks**: Competitive salaries, comprehensive health benefits (medical, dental, vision), equity packages, 401(k) with up to 4% match, generous parental leave, 20 days PTO + 15 holidays, free EV charging [newlimit.com](https://www.newlimit.com/careers).
- **Engineering Culture**: Strong emphasis on computational biology, machine learning, and functional genomics. The team spans both wet-lab and dry-lab disciplines, with a focus on building scalable methods and iterative data-driven discovery.

## Sources
1. [NewLimit Website](https://www.newlimit.com/)
2. [NewLimit Careers Page](https://www.newlimit.com/careers)
3. [NewLimit Company Page](https://www.newlimit.com/company)
4. [NewLimit Team Page](https://www.newlimit.com/team)
5. [NewLimit LinkedIn Page](https://www.linkedin.com/company/newlimit)

## Other roles at NewLimit

- [Senior Scientist / Scientist, In Vivo Pharmacology](https://feeny.ai/job/senior-scientist-scientist-in-vivo-pharmacology-newlimit-south-san-francisco-t4a3w08ps5rd) — South San Francisco, CA
- [Senior Manager, Lab Operations](https://feeny.ai/job/senior-manager-lab-operations-newlimit-south-san-francisco-2s9yfb1zrv9n) — South San Francisco, CA
- [Scientist, LNP-Lipid Chemistry](https://feeny.ai/job/scientist-lnp-lipid-chemistry-newlimit-south-san-francisco-dhqb4z5sh4rw) — South San Francisco, CA
- [Scientist, LNP-Drug Product Development](https://feeny.ai/job/scientist-lnp-drug-product-development-newlimit-south-san-francisco-nyvhkqvmdezz) — South San Francisco, CA
- [VP/Senior Director, Clinical Operations](https://feeny.ai/job/vp-senior-director-clinical-operations-newlimit-south-san-francisco-3myq4z294a7c) — South San Francisco, CA
- [Laboratory Operations Specialist](https://feeny.ai/job/laboratory-operations-specialist-newlimit-south-san-francisco-mf010pr8xwk8) — South San Francisco, CA
- [Executive Recruiter](https://feeny.ai/job/executive-recruiter-newlimit-south-san-francisco-gyv2et7crq90) — South San Francisco, CA
- [Executive Assistant](https://feeny.ai/job/executive-assistant-newlimit-south-san-francisco-jznmrqh4wrvw) — South San Francisco, CA
- [IT & Security Lead](https://feeny.ai/job/it-security-lead-newlimit-south-san-francisco-zdar0wnmwbkn) — South San Francisco, CA
- [Senior/Research Associate, Functional Genomics](https://feeny.ai/job/senior-research-associate-functional-genomics-newlimit-south-san-francisco-09h6rva4fp46) — South San Francisco, CA