Sr. Platform Engineer, L3

Why This Role Matters This role helps support the technical foundation behind Citrine’s platform and engineering organization. The person in this role will contribute to infrastructure and deployment systems that are observable, reliable, scalable, and aligned with the needs of a growing team. About the Role Citrine Informatics is looking for a Senior Infrastructure / Platform Engineer to help shape, implement, and operate scalable cloud infrastructure and platform systems. This role is a fit for someone with experience across infrastructure, automation, deployment, and production operations, and who enjoys working closely with others to improve reliability, developer workflows, and platform capabilities. This person will contribute to cloud infrastructure in AWS, infrastructure as code, Kubernetes operations, CI/CD, observability, and containerization. Just as important, they will bring sound judgment, adaptability, and a collaborative working style suited to a fast-moving environment where priorities can evolve and teams work together to solve complex problems. Team Fit and Working Style We are looking for someone who pairs technical depth with a collaborative and thoughtful approach to problem-solving. Successful candidates will likely bring: Experience working closely with others in shared technical environments A communication style that supports productive collaboration, knowledge sharing, and healthy decision-making Comfort making progress in situations where not every variable is known at the outset A practical, iterative mindset and willingness to learn as the team moves forward Flexibility to take on a range of responsibilities depending on team priorities and current challenges Good judgment in managing time, scope, and competing priorities Responsibilities Design, implement, and maintain cloud infrastructure in AWS with attention to scalability, reliability, security, and automation Manage infrastructure using Infrastructure as Code, including hands-on work with Terraform and experience with CloudFormation Deploy, administer, and maintain Kubernetes clusters in production environments Improve platform tooling, deployment workflows, and operational practices that support engineering teams and production systems Implement and manage observability and monitoring solutions, ideally including experience with Datadog, across metrics, logging, alerting, and incident response Work with containerized systems and deployment workflows, including image build pipelines and optimization techniques Create and maintain CI/CD pipelines, including required experience with GitHub Actions; experience with Jenkins and/or ArgoCD is a plus Partner with teammates across engineering to identify needs, evaluate options, and deliver practical infrastructure and platform solutions Investigate platform and infrastructure issues, support root-cause analysis, and contribute to sustainable improvements Participate in technical planning, architecture discussions, and continuous improvement efforts across the platform engineering function Skills and Experience Experience in infrastructure engineering, platform engineering, DevOps, or site reliability engineering roles Hands-on experience working in AWS production environments, preferably experience using CloudFormation Meaningful hands-on expertise with Terraform, including writing and managing infrastructure beyond basic exposure Experience implementing observability and monitoring practices, preferably with Datadog Production experience with Kubernetes administration and deployment, including cluster deployment, configuration, and maintenance Experience with container build and deployment systems, including image optimization techniques such as layer management and efficient build strategies Experience implementing and managing CI/CD pipelines, especially with GitHub Actions Experience contributing to the design and deployment of infrastructure or platform systems from implementation through production operations Comfort working through technical challenges in environments where priorities and requirements may continue to evolve Nice-to-Haves Experience in startup or high-growth environments with small, collaborative teams Exposure to platform engineering practices such as developer enablement, internal tooling, and operational maturity initiatives Experience balancing near-term delivery with longer-term maintainability Studies have shown that women and underrepresented minorities are less likely to apply for jobs unless they meet every single qualification listed. Citrine Informatics is invested in creating a diverse, authentic, and inclusive team, so if you’re excited about this role but your past experience doesn’t perfectly align with what you read above, please consider applying anyway! Equal Opportunity All qualified applicants will receive consideration for employment without regard to race, creed, color, or national origin. Please let us know if you need any accommodations during the interview process. Accommodations Citrine is an inclusive work environment, and we are committed to ensuring equal opportunity in employment for qualified persons with disabilities. Please email us at or inform your recruiter if you require any reasonable accommodations throughout the recruiting process. Interview Process, Security, and AI Use Citrine is committed to a fair, secure, and transparent hiring process. Depending on the role, our interview process may include live video interviews, technical or skills-based assessments, and reasonable verification steps designed to protect candidates and our company from fraud, impersonation, and other security risks. We may also use technology tools, including AI-enabled tools, to support parts of the hiring process such as scheduling, note organization, fraud detection, and assessment administration. These tools are used to assist our team and are not the sole basis for employment decisions. Human reviewers remain responsible for evaluating candidates and making hiring decisions. In some cases, and where legally permitted, we may ask for your consent to record an interview for hiring, quality, security, and interviewer training purposes. We will provide notice in advance when recording is planned and will handle recordings and related interview data in accordance with applicable law and our privacy and retention practices. For more information on acceptable candidate use of AI tools in our interview process, please see Citrine’s Philosophy on AI Usage in Interviews . Our Core Values Citrine Informatics recognizes that its most valuable asset is its people. We have created our set of Core Values to encourage, support, and invest in our team as they work to innovate and support a more sustainable world. Our Core Values reflect our ongoing commitment to continuously invest in nurturing our talent and our people-first approach to conducting business. - We take pride in and recognize the successes and growth of ourselves and our colleagues. We support each other in our growth . - We prototype and collect data to make good decisions. We question that data and are constantly iterating to find the best solution. - We are all owners of Citrine and make decisions like owners. We work autonomously with personal and organizational accountability. - We commit to building a diverse and inclusive community within Citrine and actively promote equity and belonging. - We are tirelessly committed to creating value for our customers . - We exist to help our customers accelerate the development of sustainable products that are critical to the future of both our planet and our industry. Compensation and Pay Transparency At Citrine, we want your path to career growth to be transparent, straightforward, fair, and easily accessible -- starting with your application and interview process. The annual salary range listed below reflects the level we are considering for this position (please note that there may be unique situations where you may fall outside of this range). Where you fall within the range will depend on how your experience and skills align with our internal leveling system as we learn more about you throughout the interview process. $165,000 USD - $185,000 USD *Range(s) listed are for full-time employees based in the United States only. Our Benefits (for exempt, full-time employees based within the United States) 401k with matching up to 4% Medical, vision, dental insurance (we pay 100% of your premium and 75% of your dependents) Company-paid Life and Disability insurance FSA and HSA plans Equity options within the company 12 weeks of paid parental leave Flexible PTO on top of our 15 paid company holidays (includes your birthday!) Free financial counseling $600 tech allowance Monthly $75 phone reimbursement $5,000 annual continuing educational allowance About Citrine Informatics At Citrine, we’re using Artificial Intelligence (AI) to enable our customers to usher in the next generation of sustainable, high-performing materials and chemicals. Our customers love what we do: “We understand our own laboratory more than before. It’s fun to work in this way.” We’re the leader in AI for materials and chemicals. 10 of the top 20 chemical companies have trusted us as their AI provider and we have created more than $100 Million dollars in value for our customers to date. Our no-code SaaS platform empowers product developers to accelerate their work using chemically-aware data management and AI tools. Citrine regularly wins awards for innovation and sustainability, earning spots on the CB Insights AI 100 list and the Inc. 5000 list of fastest-growing private companies in the US. Our customers include leading organizations such as LyondellBasell, Evonik, Grace, Avery Dennison, and Syensqo. We also collaborate with researchers from world-renowned institutions on cutting-edge research at the intersection of AI and the physical sciences. Our team is exceptional, eager to grow and learn from each other. Team members work remotely throughout North America and Europe driven by our sustainability mission. We’re growing quickly, and looking for the best to join us!