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RF Lead Engineer Location: Cambridge, UK Team: Engineering Job Type: Full-Time, Permanent 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 are one team. Collaboration is at the heart of how we work – we listen, share, and build solutions together. We support one another, embrace challenges and fun, and celebrate collective success. Together with our stakeholders, we turn collaboration into outcomes that matter. Innovation with intent : We operate at the forefront of technology, building innovative pathways to the future that meets real customer needs. Solutions driven : We deliver effortless connectivity through innovative, manufacturable designs that solve real world challenges. Customer focused: We act with integrity and hold ourselves accountable to deliver customer focused solutions. All decisions we make are guided by a deep commitment to meeting our customers’ expectations. Sustainable : We make responsible choices in design, supply chain, and operations. We simplify where possible, reducing waste, and contributing to a more efficient and sustainable RF ecosystem. Role Overview: We are seeking a skilled RF Lead Engineer to join our growing development team in Cambridge, UK. You will lead the detailed RF design, development, and delivery of RF subsystems within a defined system architecture. This role is hands-on and delivery-focused, combining deep RF technical expertise with team leadership, mentoring, and cross-functional collaboration. You will be responsible for ensuring RF designs meet performance, quality, and schedule requirements, working closely with the System Architect and other engineering disciplines. Key Responsibilities: RF Technical Leadership Lead RF design activities across assigned projects in line with system-level requirements and architecture Own subsystem performance, implementation, and technical delivery Lead design reviews and provide technical approval for RF designs RF Design & Development Design, simulate, and validate RF circuits and subsystems (e.g. LNAs, PAs, filters, Duplexers) Translate system and architectural requirements into detailed RF designs Support RF trade-offs and optimisation within given architectural constraints Testing & Verification Define and execute RF test plans and verification activities Analyse RF measurements including S-parameters, NF, phase noise, EVM, ACPR, and linearity Lead troubleshooting and root-cause analysis of RF performance issues Mentorship & Team Development Provide technical guidance and mentoring to RF engineers Promote best practices in RF design, documentation, and verification Support skills development and knowledge sharing within the RF team Cross-Functional Collaboration Work closely with the System Architect, and full multi-disciplinary team Provide RF input to project planning, risk management, and technical decision-making Support manufacturing, production test, and in-service support activities