Professional | Permanent | Full-time | HybridIf you’re passionate about changing lives for the better, this is the opportunity you’ve been waiting for. In Research & Development, we’re continuously exploring innovative new treatment options to make a stronger, more positive impact on the lives of the patients we serve. You’ll work with talented colleagues in a state-of-the-art Research & Development environment, developing innovative medicines that change the life of patients for the better and help us make progress towards our vision of a world free of pain. Join us today, and discover the difference you can make.What The Job Looks LikeEvery day you will enjoy different challenges such as:Lead the design and computational optimisation of RNA therapeutics, particularly siRNA, integrating RNA biology with oligonucleotide chemistry to enable gene knockdown and RNA regulatory approaches, including up-regulation strategies.Define and prioritise target sites and design strategies by integrating sequence features, RNA accessibility, transcript structure, cross-species alignment, and emerging experimental dataDrive iterative design-test-learn cycles by analysing and rapidly integrating datasets linking sequence, chemistry, and biological activity to inform decision‑makingDevelop and apply computational tools and workflows (e.g. Python or R) to enable scalable oligonucleotide design, data integration, and rapid sequence-chemistry iterationPartner closely with oligonucleotide chemists and delivery scientists to co-optimise sequence, chemical modifications, and delivery approaches to maximise potency, durability,



and tissue activityLead and contribute to discovery programs advancing RNA therapeutic candidates toward candidate profiling and clinical development, while helping prioritise and evaluate new targets aligned with platform capabilities.What You’ll Bring To The TableTo make the most of this role and truly thrive, you should have:PhD in RNA biology, molecular biology, computational biology, bioinformatics, or a related disciplineMore than 10 years of relevant industry experience, including at least 5 years in therapeutic antisense or siRNA design and optimisationStrong computational skills, including experience developing scripts or workflows (e.g. Python or R)Experience designing siRNA across CNS and systemic delivery contexts, including optimisation of sequence and chemistry for robust in vivo activityProven track record contributing to or leading programs that progressed molecules to candidate stage, with demonstrated involvement in programs advancing toward clinical developmentStrong understanding of oligonucleotide optimisation and risk assessment across discovery and development stages, from early design through to late-stage candidate selectionExperience delivering siRNA therapeutics in liver and CNS indications is highly desirable, ideally including progression of molecules toward clinical developmentStrong scientific problem‑solving mindset with a focus on delivering impactAbility to operate effectively in a highly matrixed, cross‑functional environment with a high degree of independence, ownership, and accountability"Be part of a team redefining what’s possible in genetic medicine, creating transformative RNA therapies for severe pain, neurological disease, and adjacent areas where we can extend the reach of our platforms."Keith Geoffrey Phillips , the Hiring Manager
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📌 Oligonucleotide Design Lead (f/m/d) (Madrid)
🏢 Grünenthal Group
📍 Madrid