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Senior Backend Engineer at Obsidian Security. . Location: Cheltenham, United Kingdom. Founded in 2017, Obsidian Security was created to close a critical gap: securing the SaaS applications where modern business happens—platforms like Microsoft 365, Salesforce, and hundreds more. . .  . . Backed by top investors including Greylock, Norwest Venture Partners, and IVP, we’ve built a complete SaaS security platform to reduce risk, detect and respond to threats, and prevent breaches at the source. Our team includes leaders who helped define the categories of endpoint and identity security at CrowdStrike, Okta, Cylance, and Carbon Black. . .  . . Now, we’re transforming how SaaS is secured—in the era of agentic AI. . .  . . Today, Obsidian is trusted by global enterprises like Snowflake, T-Mobile, and Pure Storage. We protect more than 200 organizations across North America, Europe, the Middle East, Southeast Asia, Australia, and New Zealand—including many of the world’s largest Fortune 1000 and Global 2000 companies.. .  . . With strong global momentum, a growing partner ecosystem including SentinelOne, Databricks, and Google Cloud, and a major fundraise on the horizon, we’re scaling quickly toward long-term growth and IPO readiness. Join us as we define the future of SaaS security!. Senior Software Engineer. . About the Role: . As a Senior Software Engineer at Obsidian, you’ll:. . . Build new backend processing systems that power Obsidian’s core product. . Maintain, improve, and evolve existing systems to ensure performance, resilience, and scalability. . Design and implement APIs and backend services, including multithreaded applications. . Collaborate with product and engineering teams to support key product themes and ensure delivery of high-impact features. . Apply strong software engineering practices to requirements gathering, system design, and code reviews. . Contribute to a fast-moving, collaborative environment where adaptability and teamwork are essential. . . What’s in It for You. . . Have a direct impact on the core product used by enterprises worldwide. . Work alongside a talented, friendly team in a supportive and collaborative culture. . Grow your skills with opportunities to learn new technologies and engineering practices. . Be part of an innovative, fast-paced environment where your contributions are valued. . Enjoy a hybrid working, with supported remote working and great office spaces in Cheltenham and Manchester. . . Required Skills & Experience. . . Minimum 5 years in a software engineering role. . Proficiency in one or more modern programming languages such as Python, Go or SQL. . Experience building backend services, APIs, and multithreaded applications. . Familiarity with containerization and orchestration technologies such as Docker and Kubernetes. . Strong knowledge of relational databases (e.g., Postgres). . Experience collaborating in team environments and adapting to changing requirements. . Understanding of software design principles and engineering best practices. . . Desirable Experience. . . Experience with cloud platforms (AWS, GCP), object storage (S3), or event/streaming systems (Kafka, Redis). . Familiarity with Git for version control and deployment tooling such as GitLab CI/CD. . Exposure to large-scale distributed systems and performance optimization. . Employee Benefits. . Our competitive benefits packages are designed to support our employees' well-being, both at work and at home.  Our US based employees enjoy:. . . Competitive compensation with equity and 401k. . Comprehensive healthcare with dental and vision coverage. . Flexible paid time off and paid holiday time off . . 12 weeks of new parent or family leave. . Personal and professional development resources. . . For more details on our US benefits, or for information on our international benefits, please see . here. .. . Pay Transparancy. . Please note that the base pay range is a guideline and for candidates who receive an offer, the base pay will vary based on factors such as work location, as well as the knowledge, skills and experience of the candidate. In addition to a competitive base salary, this position is eligible for equity awards and may be eligible for sales commission or incentive compensation based on the role or function within the company.. . At Obsidian, we are proud to be an equal-opportunity employer. We value diversity and hire for talent, passion, and compassion. In compliance with federal law, all persons hired will be required to submit satisfactory proof of identity and legal authorization.  If you have a need that requires accommodation, please contact [email protected]. . Information collected and processed as part of any job applications you choose to submit is subject to Obsidian’s . Applicant Privacy Policy. .. Base Salary Range. £93,000. - . £126,000. . GBP