• Facilitate an interview through Karat's platform. • Create an enjoyable candidate experience while you evaluate a candidate's fundamental coding skills and technical knowledge. • Provide input on the candidate's performance, coding style, communication skills, knowledge question answers, and coding approach. • Collaborate with Karat to test content, processes, and products.

• Facilitate an interview through Karat's platform. • Create an enjoyable candidate experience while you evaluate a candidate's fundamental coding skills and technical knowledge. • Provide input on the candidate's performance, coding style, communication skills, knowledge question answers, and coding approach. • Collaborate with Karat to test content, processes, and products.

Software Engineer Job Description: Software Engineer Location: Cambridge, UK Team: Engineering Job Type: Full-Time, Permanent Flexible work hours and remote work options. About Us: Forefront RF is a fabless semiconductor company developing breakthrough RF technology that radically simplifies RF front-end architectures for mobile and connected devices. Our long-term vision is to empower anyone to treat global connectivity as a commodity, effortlessly adding it to any device. We lead through innovation, solving our customers’ toughest challenges, enabling them to stay ahead by pushing the boundaries of RF design. Our Values: Our values are the quiet nudge that help us to be our best in every interaction. - One team: We listen, share, and build solutions together. Collaboration is at the heart of how we work. We support one another, embrace challenges and fun, and celebrate collective success. - Innovation with intent: We operate at the forefront of technology, building innovative pathways to the future that meets real customer needs. - Solutions driven: We develop world leading manufacturable products that deliver effortless connectivity. - Customer focused: We act with integrity, hold ourselves accountable, and are guided by a deep commitment to deliver customer focused solutions. - Sustainable: We design for longevity and reuse - leveraging globally connected RF technology to extend product lifecycles and reduce waste. Role Overview: We are seeking a skilled and motivated Software Engineer to join our team in the UK. The successful candidate will design and deliver production-quality software that brings advanced RF measurement and optimisation algorithms to life on complex RF hardware. The role focuses on supporting the development of software that implements RF system control and optimisation concepts. Working closely with RF and systems engineers, you will help develop, test, and maintain Python-based RF tuning algorithms, hardware/instrument interfaces and drivers, and engineering tools, ensuring they are reliable and suitable for use alongside real hardware systems Key Responsibilities: - Design, develop, and maintain Python-based software used for algorithm development and deployment. - Work closely with RF hardware and systems engineers to ensure strong alignment between software behaviour and real-world hardware. - Integrate, test, and validate software and algorithms on hardware prototypes and production systems. - Apply sound software engineering practices, including modular design, version control, testing, and documentation. - Help diagnose and troubleshoot, software and algorithm performance issues during development and deployment. - Balance rapid experimentation with the evolution of code into robust, long-lived software - Develop unit tests, validation tools, and reference datasets to verify algorithm correctness and support robust regression testing throughout development. Supporting Responsibilities: - Support integration with measurement systems, test equipment, and internal tooling as needed for algorithm validation - Contribute to documentation and technical knowledge-sharing within the engineeringteam. Requirements About you: You’re excited by the opportunity to work with breakthrough technologies. You may thrive in this role if you have some or all of the following: Education & experience: - Bachelor’s or Master’s degree in Electronic Engineering, Physics, or a closely related discipline - Proactive approach and a willingness to tackle complex technical challenges - Demonstrable experience in software development, with strong proficiency in Python. - Understanding of RF measurements and related test procedures is a strong plus. - Familiarity with test equipment interfacing and communication protocols. - Experience with real time processing is desirable - Prior experience working with RF modules, wireless systems, or telecommunications is a strong plus People Skills: - Strong communication and collaboration abilities. - Ability to work independently and as part of a team. - Attention to detail and commitment to producing high-quality software. Benefits - Competitive salary and pension contributions. - Company Share Option Scheme. - 25 days holiday + bank holidays. - Weekly company lunches. - Flexible work hours and remote work options. - Private medical insurance - Life assurance x 4 - Income protection - Healthshield Cash plan - Heka flexible benefits platform We believe in equal opportunities We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, sex, gender identity, sexual orientation, age, non-disqualifying physical or mental disability, national origin, veteran status, or any other basis covered by appropriate law. All employment is decided on the basis of qualifications, merit, and business need.

Requisition Number: 2352031 Optum is a global organization that delivers care, aided by technology to help millions of people live healthier lives. The work you do with our team will directly improve health outcomes by connecting people with the care, pharmacy benefits, data and resources they need to feel their best. Here, you will find a culture guided by inclusion, talented peers, comprehensive benefits and career development opportunities. Come make an impact on the communities we serve as you help us advance health optimization on a global scale. Join us to start Caring. Connecting. Growing together. Positions in this function design, engineer, and manage the organization's infrastructure and operational platforms. From a cloud services model, this includes services commonly thought of as IaaS and PaaS and their underlying foundational components. Additionally, this function also has responsibility for traditional enterprise infrastructure and operational platforms such as email, file transfer, and collaboration technologies, among others. This role must understand functional and non-functional requirements to ensure they can be achieved through system design and engineering to meet the needs of the customers. Work closely with business and technology stakeholders to develop roadmaps for their respective technology portfolios, resolve cross-system and domain dependencies, ensure effective integration among the services offered to the end customer, and efficient usage of infrastructure and operational platforms. Monitor technological advancements and industry trends to influence company standards and ensure that solutions are continuously improved and maintained through product management practices, including recommendations to invest in a solution or retirement of redundant or out-of-date systems. Understand the interactions between systems, the applications and services hosted, and evaluate the impact of changes and additions. Perform analysis on existing systems to ensure performance and reliability, enhance scalability, meet security requirements, and interoperable and maintainable technology portfolio. Primary Responsibilities: - Certificate & PKI Administration - Administer and support enterprise PKI infrastructure, including Root and Issuing CAs. - Manage certificate issuance, renewal, revocation, and retirement for: - Internal server certificates - External/public TLS certificates - Load balancers, proxies, and gateways - Application and service certificates - Maintain certificate templates, enrollment policies, and validity standards. - Operate and monitor CRL, OCSP, and certificate distribution endpoints. - Perform routine PKI health checks, audits, and lifecycle reviews. - Certificate Lifecycle Operations - Proactively monitor certificate expiration across environments and prevent outages. - Execute planned certificate rotations with zero or minimal downtime. - Respond to certificate-related incidents, including expired, misconfigured, or revoked certificates. - Maintain certificate inventory, ownership metadata, and renewal methods. - Support external CA interactions for publicly trusted certificates (e.g., domain validation, reissuance). - Automation & Operational Enablement - Leverage existing automation tools and platforms to streamline: - Certificate renewals - Certificate deployment to servers, load balancers, and platforms - Perform light scripting (PowerShell, shell, or Python) for: - Operational automation - Reporting - Certificate discovery - Work with automation and platform teams to integrate certificate management into: - Infrastructure workflows - Load balancer or ingress updates - Maintain and execute runbooks for automated and manual certificate processes. - Note: This role does not require building complex applications or frameworks. Automation is focused on operational reliability and efficiency, not software development. - Compute & Platform Integration - Install, update, and maintain certificates on: - Windows and Linux servers - Web servers (IIS, Apache, Nginx) - Reverse proxies and load balancers (F5, HAProxy, Citrix, etc.) - Support certificate needs for: - Virtual machines - Container platforms (Kubernetes, OpenShift - operational use) - Cloud workloads - Coordinate with network and security teams to implement TLS standards and policies. - Governance, Risk & Compliance - Ensure certificates meet enterprise standards for: - Key sizes - Algorithms - Validity periods - Naming conventions and SAN rules - Support audits and compliance activities (SOX, PCI, ISO, internal security reviews). - Maintain documentation for PKI architecture, renewal processes, and operational procedures. - Analyzes and investigates - Provides explanations and interpretations within area of expertise - Comply with the terms and conditions of the employment contract, company policies and procedures, and any and all directives (such as, but not limited to, transfer and/or re-assignment to different work locations, change in teams and/or work shifts, policies in regards to flexibility of work benefits and/or work environment, alternative work arrangements, and other decisions that may arise due to the changing business environment). The Company may adopt, vary or rescind these policies and directives in its absolute discretion and without any limitation (implied or otherwise) on its ability to do so Required Qualifications: - Undergraduate degree or equivalent experience. - 5+ years in compute, infrastructure, or systems administration - 3+ years hands on experience managing PKI and certificate services - 3+ years hands on experience managing certificates and PKI in production environments - Proven experience supporting infrastructure platforms at scale - Solid operational experience with: - Certificate issuance and renewals - Internal and external certificates - Enterprise infrastructure environments - Technical Skills (Administrator-Level) - Experience administering Microsoft AD CS and/or enterprise PKI tools. - Hands on experience deploying certificates to: - Windows/Linux servers - IIS, Apache, Nginx - Load balancers or reverse proxies - Hands on administration of: - Microsoft AD CS or similar PKI platforms - Windows and Linux server environments - Experience managing certificates on: - Web servers (IIS, Apache, Nginx) - Load balancers or reverse proxies - Solid understanding of: - X.509 certificates - TLS / HTTPS - Certificate chains and trust models - Certificate chaining and trust relationships - Familiarity with certificate tooling such as: - Venafi, Keyfactor, AppViewX, DigiCert, Sectigo (any one or more) - Working knowledge of: - PowerShell and/or basic Python or shell scripting - ITSM tools (e.g., ServiceNow) - Basic scripting for administrative automation - Familiarity with enterprise certificate platforms (any of): - Venafi - Keyfactor - AppViewX - DigiCert / Sectigo Preferred Qualifications: - Experience with cloud certificate services (AWS ACM, Azure Key Vault Certificates). - Operational experience with Kubernetes certificates (supporting cert manager or ingress certs) - Experience using ITSM tools (ServiceNow or similar) - Exposure to Kubernetes certificate administration (cert-manager from an ops perspective). - Exposure to cloud compute certificate services (AWS ACM, Azure Key Vault Certificates) - Background supporting regulated or audited environments - Familiarity with: - HSM-backed key storage - Code-signing certificates - Device or service identity certificates - Security or infrastructure certifications At UnitedHealth Group, our mission is to help people live healthier lives and make the health system work better for everyone. We believe everyone-of every race, gender, sexuality, age, location and income-deserves the opportunity to live their healthiest life. Today, however, there are still far too many barriers to good health which are disproportionately experienced by people of color, historically marginalized groups and those with lower incomes. We are committed to mitigating our impact on the environment and enabling and delivering equitable care that addresses health disparities and improves health outcomes - an enterprise priority reflected in our mission. Optum is a drug-free workplace. © 2026 Optum Global Solutions (Philippines) Inc. All rights reserved.