738,299open jobs
44,403companies
105,260added this week
Browse all
Salary
$100k – $139k per year
Location
In office (New York)
Seniority
Middle · 6+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Sep 24, 2026. First seen by Alion on Sep 15, 2026.

Overview
Company
Impact
Profile match
Lexeo Therapeutics is a New York City-based, clinical stage genetic medicine company dedicated to reshaping heart health by applying pioneering science to fundamentally change how cardiovascular diseases are treated.

Role Summary

This Scientist II will independently design, execute, and analyze research studies and will drive one or more analytical development projects for AAV-based gene therapy programs. The role provides technical leadership in the development, optimization, qualification, validation, and transfer of analytical assays, including cell-based potency and molecular methods such as qPCR and ddPCR. The Scientist II will apply broad scientific knowledge and novel approaches to establish AAV mechanisms of action in cellular systems, resolve moderately complex technical issues, and support GMP manufacturing, material release, and regulatory submissions in collaboration with groups across CMC, Quality, QC, and external partners.

The ideal candidate is highly collaborative, detail-oriented, able to manage multiple priorities, and effective in a fast-paced environment. The Scientist II is expected to exercise sound scientific judgment, communicate complex technical issues clearly, build alignment across functions, and serve as a technical resource to colleagues. This is a highly visible and impactful role in our CMC organization.

Primary Responsibilities

  • Independently design and optimize analytical methods involving in-vitro cell culture and AAV transduction to demonstrate potency of the gene therapy vectors
  • Assist in the timely development and internal testing of CQAs, including potency assays, in a target-specific manner
  • Generate high-quality, reproducible data to support assay qualification, validation, method transfer, and QC-related activities for GMP material release
  • Analyze, interpret, summarize, and communicate findings through technical reports and presentations that clearly describe the scientific problem, relevant literature, experimental procedures, observations, and conclusions
  • Assist in driving analytical strategy and support regulatory submissions in collaboration with internal groups across CMC, Quality, and CROs
  • Identify technical risks related to assay performance, evaluate relevant factors, and develop mitigation strategies, novel processes, or alternative approaches to solve problems and support continuous improvement
  • Collaborate on and review technical documentation and protocols to support late-phase assay validation projects at respective CDMO/CROs
  • Maintain accurate laboratory records and ensure compliance with company policies and regulatory standards
  • Apply industry best practices, regulatory expectations, and quality standards related to analytical development for gene therapy products, exercising judgment within generally defined practices and policies when selecting methods and techniques
  • Apply results and learnings from previous studies, and assimilate knowledge or techniques from adjacent scientific fields, to address new or different problems and achieve project goals
  • Collaborate and build constructive relationships across departments; serve as a technical resource and provide scientific coaching and technical guidance within project teams

Required Skills and Qualifications

  • BS in Biology, Chemistry, Biochemistry, Biotechnology, Pharmaceutical Sciences, Chemical Engineering, or a related scientific discipline with 6-8 years of relevant experience (MS with 4-6 years or PhD with 1-3 years of relevant industry experience)
  • Experience in cell and gene therapy products
  • Strong hands-on experience with tissue culture, analytical assay development and execution, data analysis, and troubleshooting
  • Experience with pharmaceutical drug-process validation and manufacture a plus
  • Knowledge of FDA, cGMP, and ICH guidelines and QBD principles a plus
  • Strong organizational skills, attention to detail, and data accuracy
  • Excellent communication, collaboration, and problem-solving skills with the ability to work effectively across functional teams
  • Cross functional acumen and highly skilled in working with complex issues and creating direction in shifting priorities and ambiguity. Results oriented with breadth and depth in pharmaceutical development and commercial products to resolve complex problems
  • Results-oriented, with strong initiative, accountability, and willingness to take ownership of projects, deliver milestones, and drive work to completion
  • Familiarity with electronic laboratory notebook and inventory systems such as Benchling or Quartzy preferred
Free account
Stop reading job ads. Get the ones that fit.
One free account turns this page into a shortlist built around your stack, your level and your pay.
Match on every job. Stack, seniority, pay and location, scored against your profile.
738,299 open roles. Read straight off company career pages, refreshed every day.
Unlimited applications. Every one you send is tracked in one place, on-site or on a company board.
3 tailored CVs a month. Rewritten for the exact job you are applying to. Included free.
Create a free account Continue with Google
Free forever. No card. Under a minute.

Recommended for you based on this role

Science & Research
Similar stack
Same company
New York
$80k – $165k per year (Estimated) • Remote (United States) • Full-Time • 1+ year exp • High School Diploma • United States
AI/ML
Computer Use
Apply
$87k – $179k per year (Estimated) • Remote (United States) • Part-Time • 1+ year exp • Bachelor's Degree • United States
AI/ML
Computer Use
Apply
$40k – $83k per year (Estimated) • Remote (United States) • Full-Time • 2+ years exp • Bachelor's Degree • Charlotte
Apply
$61k – $133k per year (Estimated) • In office • Full-Time • 2+ years exp • High School Diploma • Long Island City
AI/ML
Ray
Apply
$65k – $103k per year • In office • Full-Time • 3+ years exp • High School Diploma • Millsboro
Apply
$136k – $172k per year • In office • Full-Time • 6+ years exp • Master's Degree • New York
Apply
$93k – $154k per year • Remote/Hybrid • Full-Time • 8+ years exp • Bachelor's Degree • New York
Apply
$158k – $207k per year • Remote/Hybrid • Full-Time • 10+ years exp • Bachelor's Degree • New York
Apply
$230k – $332k per year • Remote/Hybrid • Full-Time • 10+ years exp • PhD • New York
AI/ML
XGBoost
Multimodal AI
Feature Store
Interpretability
Apply
$81k – $92k per year • In office • Full-Time • 5+ years exp • High School Diploma • McLean • New York
Management
Outlook
Microsoft Office
Apply
$215k – $246k per year • In office • Full-Time • 7+ years exp • Bachelor's Degree • New York
Python
Java
SQL
Scala
Databases
Snowflake
Databricks
Cassandra
DynamoDB
Amazon Redshift
AI/ML
Spark
Dagster
Machine Learning
DevOps
Splunk
GCP
Azure
AWS
Management
Agile
Apply
$245k – $279k per year • In office • Full-Time • 10+ years exp • Bachelor's Degree • San Francisco • New York • San Jose
Python
Go
JavaScript
Rust
TypeScript
C#
Scala
AI/ML
AI Agents
Machine Learning
DevOps
GCP
Azure
AWS
HPC
Apply
$201k – $229k per year • In office • Full-Time • 4+ years exp • Bachelor's Degree • New York • McLean
Apply
$220k – $325k per year • Remote/Hybrid • Full-Time • 10+ years exp • New York
AI/ML
AI Agents
LLM
DevOps
CI/CD
Apply
See all jobs
This is one of many
738,299 more open roles from verified company boards, updated every day.