Flagship Pioneering

Associate Scientist/Scientist I, LNP Formulations

Flagship Pioneering$96K — $134K *
Pharmaceuticals & Biotech
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • Ph.D. with 0-1 years or relevant experience with M.Sc. (4+ years) or B.Sc. (6+ years) in relevant fields
  • Hands-on experience in LNP or nanoparticle formulation and characterization
  • Strong understanding of drug delivery systems for nucleic acids
  • Experience with nanoparticle characterization techniques (DLS, zeta potential, assays)
  • Proven ability to design and troubleshoot experiments independently

Responsibilities

  • Design and characterize lipid nanoparticle (LNP) systems for nucleic acid delivery
  • Develop and optimize formulation processes including microfluidic mixing
  • Evaluate novel ionizable lipids and analyze structure-function relationships
  • Troubleshoot formulation and process challenges
  • Generate reproducible data and maintain documentation
  • Prepare LNP formulations for internal and partner projects
  • Collaborate cross-functionally with various teams

Benefits

  • Healthcare coverage
  • Annual incentive program
  • Retirement benefits
  • Broad range of other benefits
Full Job Description
THE ROLE

Mirai Bio is seeking a scientist to advance our lipid nanoparticle (LNP) delivery platform for nucleic acid therapeutics. Mirai Bio is seeking a highly talented and motivated individual to develop and optimize lipid nanoparticle (LNP) formulations. The successful candidate will contribute to both platform innovation and preclinical pipeline programs, working at the interface of formulation science, Chemistry, analytical characterization, and process development.

KEY RESPONSIBILITIES
  • Design, formulate, and characterize lipid nanoparticle (LNP) systems for nucleic acid delivery across early research and preclinical development stages
  • Develop and optimize formulation processes, including microfluidic mixing and scale-up approaches (e.g., TFF, ultrafiltration)
  • Screen and evaluate novel ionizable lipids and LNP compositions; analyze structure-function relationships to improve delivery performance
  • Troubleshoot formulation and process challenges to enhance robustness, reproducibility, and scalability
  • Generate high-quality, reproducible data and maintain thorough documentation in electronic lab notebooks
  • Prepare LNP formulations to support internal research and partner programs
  • Collaborate cross-functionally with analytical, translational, and Tech development teams to advance platform goals
  • Present data and insights clearly to internal teams and contribute to scientific discussions and decision-making

PROFESSIONAL EXPERIENCE & QUALIFICATIONS
  • Ph.D. and 0-1 years or 4+ years (M.Sc.) or 6+ years (B.Sc.) of relevant industry experience in LNP formulation optimizations and drug delivery with strong background in nucleic acid therapeutics and education in life sciences or engineering (Pharmaceutical Sciences, Biomedical Engineering, Biochemistry, etc)
    • Level (Associate Scientist or Scientist I) will be determined based on experience, technical expertise, and demonstrated impact.
  • Hands-on experience in nanoparticle or LNP formulation and characterization
  • Strong understanding of drug delivery systems, particularly for nucleic acid therapeutics
  • Experience with nanoparticle characterization techniques (e.g., DLS, zeta potential, fluorescence-based assays such as Ribogreen, chromatography)
  • Demonstrated ability to design, execute, and troubleshoot experiments independently
  • Strong data analysis, documentation, and communication skills

PREFERRED QUALIFIATIONS
  • Familiarity with formulation process technologies (e.g., microfluidic mixers, pumping systems, TFF)
  • Experience with high-throughput formulation screening approaches
  • Knowledge of lipid chemistry, ionizable lipid design, or bioconjugation techniques
  • Experience supporting in vivo studies or translating formulations from research to preclinical scale

WHAT WE VALUE
  • Scientific rigor and attention to data quality and reproducibility
  • Curiosity and a problem-solving mindset
  • Ability to work both independently and collaboratively in a fast-paced environment
  • Clear and concise communication across disciplines
  • Ownership and accountability in driving projects forward

LOCATION: Cambridge, MA

#LI-TL1

The salary range for this role is $96,000 - $134,000. Compensation for the role will depend on a number of factors, including a candidate's qualifications, skills, competencies, and experience. Mirai Bio currently offers healthcare coverage, annual incentive program, retirement benefits and a broad range of other benefits. Compensation and benefits information is based on Mirai Bio's good faith estimate as of the date of publication and may be modified in the future.

About Flagship Pioneering

Flagship Pioneering is a life sciences innovation enterprise that conceives, creates, resources, and develops first-in-category life sciences companies. The firm operates through its Flagship Labs unit, which is a dedicated innovation foundry that invents and launches transformative companies. Flagship Pioneering has created over 100 scientific ventures, resulting in over $34 billion in aggregate value, 500+ issued patents, and more than 50 clinical trials for novel therapeutic agents. The firm's portfolio includes companies in the fields of therapeutics, health technologies, and sustainability. Flagship Pioneering was founded in 2000 and is headquartered in Cambridge, Massachusetts.
Learn more about Flagship Pioneering
Size
500 employees
Industry

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