---
title: 'Scientist, LNP-Lipid Chemistry at NewLimit'
canonical: 'https://feeny.ai/job/scientist-lnp-lipid-chemistry-newlimit-south-san-francisco-dhqb4z5sh4rw'
type: 'job'
last_seen: '2026-09-11'
---

# Scientist, LNP-Lipid Chemistry at NewLimit

- **Company:** NewLimit
- **Location:** South San Francisco, CA
- **Posted:** 2026-08-05
- **Last confirmed live:** 2026-09-11
- **Apply:** https://job-boards.greenhouse.io/newlimit/jobs/6135782004

## Job description

Company info

NewLimit is a biotechnology company working to radically extend human healthspan. We’re developing medicines to treat aging by reprogramming the epigenome, a new therapeutic mechanism to restore youthful function in aged cells. We’ve built the world’s leading experimental and artificial intelligence system to discover reprogramming medicines at massive scale. Our first products are focused on restoring youthful metabolic, endothelial, and immune function.

Description

NewLimit is seeking a Lipid Chemist to design, synthesize, and characterize ionizable lipids, PEG-lipid Conjugates, peptide and antibody conjugates to build our targeting LNP platform with a particular focus on getting nucleic acid payloads into target cells and tissues beyond the liver.

This is a hands-on bench role with real lipid design ownership. You will work closely with the Delivery Sciences and biology teams to design and build relevant Ionizable and targeting lipids portfolio for New Limit’s pipeline programs.

## What you’ll do

- Design new ionizable lipids and lipid conjugates for antibodies, peptides, and other targeting moieties across multiple structural families, pushing the platform beyond current-generation materials.
- Devise and execute practical synthetic routes to priority targets to support NewLimit’s pipeline needs for targeting lipids.
- Plan synthesis and purification for these modalities with scale and final purity in mind from the outset, delivering against agreed project timelines.
- Build ionizable and targeting lipids for the tLNP platform using an SAR-based approach to guide the next design cycle rather than simply cataloging results.
- Develop conjugation chemistry that links peptides, antibodies, nanobodies, and small-molecule ligands to lipid anchors, generating building blocks for cell- and tissue-selective delivery to support tLNP research and pipeline targets.
- Turn in vitro and in vivo data from discovery teams into concrete structural hypotheses and revised molecules.
- Present synthetic strategy, experimental results, and SAR conclusions, authoring protocols and technical reports.

## Requirements

- PhD in Chemistry, Pharmaceutical Chemistry, or a related discipline, plus 1–2 years of relevant work; or an MS with 5 years of focused lipid design experience for liposomal or lipid nanoparticle applications.
- Strong skill set in the design and synthesis of new lipids or other delivery chemistries, performed personally rather than with a supervisor directing each step.
- SAR-driven design, synthesis, purification, and characterization of ionizable lipids and PEG-lipid conjugates, using tools such as ChemDraw, Sci-Finder, Reaxsys, and AI-based SAR prediction tools for tLNP applications.
- Working knowledge of conjugation chemistries for attaching targeting moieties such as peptides, antibodies, nanobodies, and small-molecule ligands, including linker design and the selection of suitable biorthogonal or site-specific handles.
- Practical purification skills spanning normal- and reverse-phase chromatography and preparative HPLC.
- Analytical characterization across LC-CAD, LC-UV, LC-MS/MS, and NMR (¹H, ¹³C, and ³¹P as needed), with the ability to deconvolute the data to produce well-characterized lipids.

## Nice to have

- Familiarity with lipid degradation pathways and impurity work such as N-oxides, hydrolysis products, and lipid–nucleic acid adducts, and how they affect potency and stability.
- Solid-phase peptide synthesis, or antibody/nanobody modification experience.
- Exposure to scale-up, CMC, or tech transfer to a CDMO.
- Experience with data visualization and statistical analysis (R, Python, JMP)

## 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: $130,000 to $171,000. 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-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
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