At a Glance
- Tasks: Design and develop innovative software solutions for air traffic management systems.
- Company: Join Raytheon, a leader in aerospace and defence with a collaborative culture.
- Benefits: Enjoy competitive salary, flexible working, and generous holiday allowance.
- Other info: Flexible working hours, early finishes on Fridays, and opportunities for volunteering.
- Why this job: Make a real impact on global safety while working with cutting-edge technology.
- Qualifications: Experience in C/C++/C# and real-time embedded software development required.
The predicted salary is between 63000 - 77000 £ per year.
Date Posted: 2026-09-16
Country: United Kingdom
Location: Harlow, Essex
Position Role Type: Hybrid
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 4% (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).
Function: Engineering
Location: Harlow (Hybrid with 4 days a week on site)
Clearance: SC Eligible
Hours: 37 hours per week with early finish on Fridays
At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world. Raytheon brings the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today’s mission and stay ahead of tomorrow’s threat. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.
Summary of Role:
Raytheon’s ATMS (Air Traffic Management Systems) Software team is seeking talented, enthusiastic and innovative individuals that thrive within an Agile eco-system to deliver world class solutions that make the world a safer place. Become a part of something greater than yourself by bringing your best in collaboration with other motivated and talented individuals across a diverse set of backgrounds and skill sets.
Main Duties:
- Design and develop product functionality, user interfaces and performance improvements.
- Key contributor & reviewer at gate & design reviews.
- Act as Subject Matter Expert as part of a wider software and systems engineering group to analyse and resolve software and system defects in response to service requests, incidents, problems and events.
- Validating and verifying the design artefacts from internal teams or subcontractors.
- Provide input to configuration, safety and quality management as appropriate.
- Document design and advise on product support material.
- Investigate product issues and develop solutions to customer problems.
- Develop test plans and methodologies to ensure product meets Raytheon quality standards.
- Lead continuous technical improvement and re-architecting activities.
- Assist in updating software design artefacts.
- Interfacing with COTS vendors for technical support.
- Provide technical support (covering the entire software lifecycle) to Raytheon programmes delivering new capability.
Candidate Requirements:
Essential:
- Relevant years' active, hands-on software development experience, working in a Team environment
- Relevant years’ experience with C/C++/C# language
- Experience in the use of UML in software design and other methodologies
- Real-Time Embedded SW programming experience
- RTOS knowledge
- Knowledge of low-level communication protocols, Ethernet, Serial, PCI Bridge
- Hands on fault investigation experience in embedded code environment
- Use of tools in software configuration management, requirements definition, high-level and detailed design, defect reporting
Desirable:
- Min 2:1 degree in a computer science or related subject
- Experience Working in an Agile/SCRUM/DevOps delivery model.
- Knowledge of Radar systems.
- Hands-on experience in reverse engineering a mature system to take advantage of a modern technology development in hardware, software and firmware.
- Competency with design patterns and their application to solve complex problems.
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.
Senior Software Engineer ATMS in Harlow employer: RTX
Raytheon UK is an exceptional employer located in Glenrothes, Fife, offering a collaborative work culture that prioritises innovation and employee growth. With a comprehensive benefits package including generous holiday allowances, a strong pension contribution, and enhanced family-friendly policies, we are committed to nurturing talent and providing meaningful career development opportunities. Join us to be part of a community dedicated to advancing technology for national security while enjoying a fulfilling and supportive work environment.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Software Engineer ATMS in Harlow
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at RTX or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to RTX.
✨Tap into Online Developer Communities
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✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like RTX that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Senior Software Engineer ATMS in Harlow
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at RTX.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at RTX and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at RTX
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If RTX uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
