Associate Scientist I, Nanoparticle Process Development
Strandtherapeutics · Boston, Massachusetts · Posted Jul 8, 2026
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Company Overview:
Strand Therapeutics is a clinical-stage biotechnology company pioneering programmable mRNA therapeutics to unlock the full potential of genetic medicines. Strand is applying its proprietary Signal Stack platform, which integrates EverScript circular RNA, AmpliScript self-replicating RNA, SignalPath targeted delivery, and logic-driven SignalLock genetic circuits to enable precise control of therapeutic activity across tissues and cell types and overcome foundational limitations in targeting, durability, and safety.
Strand is advancing a pipeline with an initial focus on oncology and autoimmune disease. Its initial program, STX-001, an intratumorally delivered LNP-encapsulated self-replicating RNA expressing IL-12, has demonstrated preliminary evidence of systemic immune activation and anti-tumor activity in patients with advanced solid tumors who have progressed on prior therapies. Building on this early clinical validation, intravenously delivered STX-003 is designed for tumor-targeted expression and avoidance of off-target expression. STX-003, which is expected to enter the clinic in mid-2026, has the potential to be a major step forward for the fields of genetic medicine and oncology. Strand is also advancing STX-005, an in vivo CAR-T program designed to enable controlled, durable expression and repeat dosing. Founded by MIT synthetic biology pioneers, Strand has raised over $250 million and is headquartered in Boston, MA.
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Job Summary:
Strand is looking for people who have the enthusiasm and motivation to be a highly contributing member of a small but extremely productive team. This opportunity will offer the employee the ability to work in a matrix-based environment and be a part of the future strategy of the company.
We are looking for a highly motivated and innovative candidate for the role of Associate Scientist I of Nanoparticle Process Development. This individual will support in production and scale up of LNPs with nucleic acid payload. Reporting to the Principal Scientist of Nanoparticle Process Development, the right candidate will be a strategic thinker that brings a leadership presence and enthusiasm for Strand along with a deep scientific knowledge.
Primary Responsibilities:
Execute experiments related to LNP mixing and downstream purification/filtration to improve the process.
Contribute to development of a robust formulation process with emphasis on scale-up, tech-transfer and stability.
Contribute to thorough characterization of LNPs by existing methods and collaborating with internal stakeholders on developing new methods.
Coordination with other team members to support the group's research activities in a fast-paced and collaborative environment.
Qualifications:
B.S. or Advanced Degree with at least 1-2 year of relevant experience with an educational focus in Chemical Engineering, Bioengineering or similar preferred.
Experience with LNPs required and nucleic acid payloads highly preferred.
Experience with TFF required with emphasis on LNPs preferred.
Experience with QbD principles, scale up efforts and JMP DOE preferred.
Experience with various mixing geometries as well large scale LNP production preferred.
Strong collaboration and inter-personal skills.
Ability to multi-task and prioritize to meet important deadlines.
Strand offers a fast-paced, entrepreneurial, team-focused small company environment. We also offer a top-notch benefits package (health, dental, life, open PTO, onsite lunch catering, commuter support and more) and work/life flexibility and integration. Being part of the Strand team allows you to become part of a small team that supports professional development while working together to meet Strand’s goals.
Strand Therapeutics is an equal opportunity employer. We do not discriminate on the basis of race, color, gender, gender identity, sexual orientation, age, religion, national or ethnic origin, disability, protected veteran status or any other basis protected by applicable law. Strand does not accept unsolicited resumes from any source other than directly from candidates.
Job Type: Full-time
Salary: $74,000 - $76,000 annually plus bonus and equity incentives
Pay Transparency Base Salary Range
$74,000 $76,000 USD