Senior Electronics Engineer

Prattwhitney; Harlow; Hybrid; GBP 70,000 - 105,000; Full time

Benefits offered by this job

Contributory Pension Scheme (up to 10.

6x salary Life Assurance

25 days holiday + statutory holidays

Company bonus scheme

Flexible Benefits scheme

Enhanced sick pay

Enhanced family-friendly policies

Job summary

RTX in Harlow is seeking a Senior Electronics Engineer to join the APNT team. You will design and integrate digital GPS anti-jam hardware, work with embedded systems, software, RF and mechanical engineers, and drive circuit verification and documentation.

The role requires 8+ years in hardware design, on‑site work with hybrid options, and the ability to mentor junior staff while maintaining production readiness for defence applications.

Qualifications

• Experience with embedded digital electronics, microprocessor systems.
• Experience with ADC/DAC and memory devices (SRAM/Flash).
• Experience with FPGAs and SoC technologies.
• Experience turning prototypes into production hardware.
• Experience supporting PCB designs to defence/airborne standards.
• Experience with high‑speed interfaces and signal integrity.
• Knowledge of Ethernet, SPI, I2C, UART, RS422.
• Design for manufacture experience.
• Clear technical communication and analytical skills.
• Willingness to mentor junior engineers and learn new techniques.
• Eligible for or holding current security clearance.

Responsibilities

• Develop requirements to ensure standards compliance.
• Collaborate with system engineers on electronic subsystem architectures.
• Create schematics, support PCB design, select components, simulate circuits, evaluate and verify.
• Work with embedded Systems, Software, RF and mechanical engineers.
• Generate design documentation and conduct technical reviews.

Skills

Embedded digital electronics

Microprocessor systems

ADC/DAC

Memory devices

FPGAs & SoC

Prototype to production

PCB design support

High‑speed interfaces

LVDS/JESD

Ethernet

SPI/I2C/UART

RS422

Design for manufacture

Analytical problem-solving

Ability to learn new techniques

Independent / team work

SC security clearance (eligible)

Mentoring engineers

Tools

Xilinx

Mentor Xpedition

SPICE

MATLAB/Simulink

Simscape

DO254 compliance

Job description

Date Posted: 2026-09-16 Country: United Kingdom Location: Harlow, Essex Position Role Type: Onsite Senior Electronics Engineer Harlow, Hybrid (min 3 days a week on site) Raytheon UK is looking for an experienced and high performing Engineer to join a successful Assured Position, Navigation and Timing (APNT) team within the Global Sensors Mission Area, creating Digital GPS Anti-Jam Systems for the military market. The role will be based at Raytheon’s Harlow facility and the successful candidate will report directly to the APNT Digital Engineering Manager.

The Senior Electronics Engineer (ideally with 8+ years of relevant experience in designing hardware) will be able to make their mark on a broad and varied range of product designs and will be expected to assist in the integration of these designs into products, being the focal point for the complete system.

Main Duties

• Develop requirements to ensure compliance to the relevant standards
• Work alongside our system engineers on architectures of electronic subsystems and own the design
• Schematic creation, PCB design support, component selection, Perform circuit simulation, evaluation and verification
• Work alongside embedded Systems, Software, RF and mechanical engineers
• Generate supporting design documentation and perform regular technical reviews

Candidate Requirements: Essential

• Experience with embedded digital electronics, microprocessor systems
• Experience of working with ADC/DAC
• Experience of working with memory devices such as SRAM, Flash
• Experience working with FPGAs and SoC technologies.
• Experience of creating prototypes and turning them into a production hardware
• Experience of supporting PCB designs in conformance with defence engineering standards/airborne standards
• Experience with High-Speed Interfaces and signal technologies such as LVDS, JESD Signal and power integrity analysis
• Working knowledge of Ethernet, SPI, I2C, UART, RS422
• Experience in designing for manufacture
• Able to present technical information clearly and concisely to others
• Demonstrable analytical and problem-solving skills
• An openness to learn and try new techniques
• Ability to adapt to a dynamic work environment - working independently or with others to overcome obstacles
• Capable of analysing and reporting on technical data
• Eligible or holder of current SC security clearance
• Mentor less experience engineers within the team

Desirable

• Experience of working with the Xilinx chip family
• Familiarity with the application of a systems engineering approach across the design and development life cycle
• Experience using the Mentor Xpedition PCB design tool and SPICE
• Experience of circuit simulation tools such as Simscape and creating spice models
• Experience of creating design models in MATLAB/Simulink
• Experience creating DO254 compliant electronic systems
• APNT systems domain knowledge and/or experience in a similar field
• Understanding of environmental requirements (shock, vibration, EMC, etc.), experience applying these requirements to a design and experience testing for these requirements

Benefits

• £: Competitive salary
• Contributory Pension Scheme (up to 10.5% company contribution)
• 6 times salary ‘Life Assurance’ with pension
• 25 days holiday (increasing with service) + statutory public holidays, plus opportunity to buy and sell up to 5 days (37hr)
• Company bonus scheme (discretionary)
• Flexible Benefits scheme with extensive salary sacrifice schemes, including Health Cashplan, Dental, and Cycle to Work amongst others
• Enhanced sick pay
• Enhanced family friendly policies including enhanced maternity, paternity &shared parental leave

Work Culture

37hr working week, although hours may vary depending on role, job requirement or site-specific arrangements. Early 1.30pm finish Friday, start your weekend early! Remote, hybrid and site based working opportunities, dependant on your needs and the requirements of the role. Up to 5 paid days volunteering each year. Flexible working culture focused on output, with more formal flexible working arrangements on request (assessed subject to role) - please highlight any requests to the Talent Acquisition team.

Equal Employment

#LI-BZ1 RTX adheres to the principles of equal employment. All qualified applications will be given careful consideration without regard to ethnicity, color, religion, gender, sexual orientation or identity, national origin, age, disability, protected veteran status or any other characteristic protected by law.

RTX is an aerospace and defense company that provides advanced systems and services for commercial, military and government customers worldwide. It comprises three industry-leading businesses – Collins Aerospace, Pratt &Whitney, and Raytheon. Its 195,000 employees enable the company to operate at the edge of known science as they imagine and deliver solutions that push the boundaries in quantum physics, electric propulsion, directed energy, hypersonics, avionics and cybersecurity. The company, formed in 2020 through the combination of Raytheon Company and the United Technologies Corporation aerospace businesses, is headquartered in Arlington, Virginia.