In the Leyden Labs Research team a new opportunity has opened up for a

RESEARCH TECHNICIAN VIRUS NEUTRALIZATION ASSAYS

to work from our office in Leiden, the Netherlands. Leyden Labs is a fast-growing biotech company currently expanding the Research team focused on pipeline filling projects for discovery of new molecules.

In your role as Research Technician you will work on the development and implementation of assays for immunological characterization of therapeutic drug candidates across a range of different modalities. Your responsibilities will include day to day planning, execution and reporting of experiments to support the team. Our new colleague has a flexible mindset, appetite for learning new skills, conducts experiments efficiently, and is full of enthusiasm to join a lab within a fast-paced team of a highly dynamic company.

More about the team:

You will join the Antibody Characterization and Optimization (ABCO) group within our Research department — a collaborative team of approximately 10 scientists and technicians dedicated to characterizing and advancing Leyden Labs’ novel therapeutic molecules. In this role, you will work closely with and under the supervision of a scientist within our Virus Neutralization Assay team. You will contribute to the development, optimization, and execution of virus neutralization assays to characterize innovative therapeutic candidates. The activities will be conducted at our Leyden Labs newly built, state of the art facilities within a vibrant campus in Leiden, Netherlands.

Why would you want to work with us:

With innovation at the forefront, Leyden Labs is on a mission to develop cutting-edge mucosal protection platforms designed to free people from the threat of respiratory viruses, such as influenza and coronaviruses. We are delighted to be at a pivotal moment in our journey having secured a further $70M in funding last year. Working at Leyden Labs will give you the opportunity to work with a group of talented people and immerse yourself in truly meaningful medical science.

This will be on your plate for the next 3 to 6 months:

• Perform experiments related to virus neutralization assays, including:

  • Cell culture and cell banking

  • Virus propagation and stock generation

  • Plaque assays and virus titration assays

  • Virus neutralization assays

• Prepare reagents, samples, and solutions for experimental work

• Collaborate with the team to develop and improve laboratory workflows

• Assist in the design, optimization, and troubleshooting of experimental protocols

• Maintain accurate and detailed records in electronic laboratory notebooks (eLNB)

• Bachelor’s degree in Life sciences or related field

• Minimum of 2 years of laboratory experience (industry experience preferred, but not required)

• Proven experience with mammalian cell culture

• Hands-on experience working with viruses is a must and virus neutralization assays strongly preferred

• Experience working according to SOPs and laboratory guidelines, preferably in ML2/BSL2 environments

• Experience with additional techniques such as ELISA, SPR, or flow cytometry is a plus

• Proficiency in MS Office; experience with GraphPad Prism and eLNB systems is preferred

• Ability to quickly learn new techniques and adapt existing protocols to evolving research questions

• Strong written and verbal communication skills, including maintaining high-quality laboratory documentation

More about you:

• You bring a proactive, positive mindset and thrive in a dynamic research environment

• You have a genuine enthusiasm for science and a strong interest in advancing therapeutic innovation

• You are a motivated, reliable team player who delivers high-quality work within agreed timelines

What we offer:

• A challenging position (32-40 hours/week) in a dynamic start-up biotechnology company with high respect to a healthy work-life balance.

• International environment - collaboration with other labs and research institutes and more than 20 nationalities in the company.

• Contribute to the development of next generation medicines providing protection against airborne viruses

• A stimulating working environment with an enthusiastic team

• Attention and possibilities for personal and professional growth

• Competitive pay and benefits

This position is open to candidates currently residing in the Netherlands with an existing EU work authorization. Ideally our new colleague starts in May 2026.

Leyden Labs is an equal opportunity employer, so we firmly believe that people thrive in a diverse and inclusive team. We are looking for people who can make an impact and work on our purpose, together.

Are you excited about Leyden Labs, our mission, and this role? Then please click the button and let me know you’re interested by sending me a short cover letter and your cv and I will get in touch within 4 working days to plan a first call. Also do not hesitate reaching out should you have any questions.

To all agency recruiters: given the important work our employees do, I kindly request that you do not approach our people directly. I'd love to hear from you at jobs@leydenlabs.com