CoreTech Security Services
Posted 4mo ago

Operational Software Engineer

CoreTech Security Services
Cheltenham, England, United Kingdom
OnsiteFull Time
Responsibilities
  • designing product
  • adding capabilities
  • prototyping solutions
Requirements
  • Full-stack software engineering with Python and languages like C/C++
  • JavaScript
  • Embedded/RT systems
  • Ability to lead projects
  • Onsite in Cheltenham
  • Security clearance preferred or sponsorship available
Technical tools mentioned
PythonCC++KotlinJavaScriptRustAndroidLinuxEmbedded SystemsMicroservicesCI/CD

Job description

Our Capability Development team develops bespoke software for our clients in the Cyber Security domain. We may be building assured software that prioritises engineering rigour and reliability, rapid cyber solutions that stitch together tooling for high‑impact results, or blended operational systems that address real-world challenges in the field. Common to all is commitment to technically led decisions, to meaningful technical challenge, and to engaging career paths where your work makes it off the shelf and into the hands of our customers. All of our roles demand strong technical expertise, meticulous attention to detail, and a commitment to delivering robust, dependable solutions that our clients can rely on when it matters most.

Our Operational Technology (OpTech) projects are typically focused on novel communications and analytics, targeting a variety of platforms from bare-metal through to large-scale Android and Linux deployments. We're looking for full-stack developers who thrive on diverse requirements, capable of jumping from front-end design to embedded platform development throughout their working week.

While much of our exsiting work uses Python, with a strong understanding of languages such as C, C++, Kotlin, JavaScript and Rust, you'll fit right in. The OpTech team focuses on user-driven applications, often involving bespoke hardware solutions. While not required, the best candidates are those with strong fundamentals in Radio Frequency (RF) communications and a desire to learn more.

We're led by engineers and empowered to optimise our (lightweight!) development processes with the knowledge gained from each project.

We are ideally looking for a candidate who holds an active Security Clearance to join our team, however, we will consider sponsoring new clearances for candidates that meet our technical requirements. 



Key Responsibilities
  • Designing a new clean-slate product with complete autonomy over its architecture.
  • Adding new capabilities to, or replacing a core component of, an existing product.
  • Throwing together a quick-and-dirty prototype to confirm the feasibility of a proposed technical approach; iterating until it meets requirements.
  • For this role you'll be hands-on in the day-to-day delivery of projects. Typically, this will see you working with one or two other colleagues at a time. In addition, you'll take an active role in unlocking the potential of junior colleagues: encouraging idiomatic code, demonstrating engineering rigour, and sharing hard-won knowledge with your peers. You’ll also help drive our engineering processes to maintain code quality while balancing realistic delivery timescales and client requirements.



    Desirable Skills
  • Experience leading a team of developers through a complete project lifecycle, engaging in requirements capture, design review, implementation, and assurance.
  • Commitment to code correctness and quality assurance through static analysis, code review, automated testing, and continuous integration.
  • Comfortable with operating under limited guidelines and requirements.
  • Candidates with hands-on experience targeting FPGA and Software-Defined Radios and knowledge of traditional Telecommunications and Satellite communications systems.
  • Demonstrable Android development (native or multiplatform).
  • Design, development and maintenance of live micro-service platforms.
  • This vacancy is for experienced software engineers and will require skills and experience in several of the areas listed as well as the ability to lead technical projects.



    Work Benefits
  • Promotions are based on technical excellence and reviewed regularly.
  • 25 days holiday per year (with bank holidays on top), option to buy up to 5 days per year.
  • Level up with an extra day of holiday per year, up to an extra 5 days, starting from 2 years' service.
  • We offer financial support to cover HMRC allowable costs of relocating if you’re moving to the area.
  • Training and development opportunities to support your career aspirations
  • O'Reilly books subscription which provides access to huge range of technical books
  • Regular events including internal technical conferences, company socials and pizza-fuelled lunchtime seminars. 
  • Free seasonal fruit, tea, coffee, milk, squash and hot chocolate.


  • Health Benefits - Private medical including access to
  • Private online GP, and a helpline to speak with various healthcare professionals.
  • Physiotherapists, osteopaths or chiropractors for muscle, bone, and joint pain.
  • Mental health - counselling, and specialist consultations and treatment with psychologists and cognitive behavioural therapists.   
  • Annual Health assessment.


  • Financial Benefits
  • A company bonus scheme so that everybody is rewarded for company success. This is an annual award that is based on the company hitting its targeted forecast. We have achieved this every year to date.
  • 8% company contribution to pension with no minimum requirement for employee contribution.
  • Death in Service cover of 4x base salary.   


  • Lifestyle Benefits
  • Enhanced maternity/paternity/adoption leave: 12 weeks maternity leave at full pay as soon as you join, further enhanced to 20 weeks full pay from 2 years’ service. 2 weeks paternity leave at full pay as soon as you join, further enhanced to 4 weeks full pay from 2 years’ service.
  • Enhanced cycle-to-work scheme including the ability to purchase a bike over £1,000 (e-bikes, specialist cycles and trikes allowed).   


  • Salary
    We are recruiting staff at all levels in this team, and are able to support market-leading salaries for every grade within our sector/location. We reward staff based on technical excellence and not years of experience, so it's important to us to speak with you to see which grade you would fit into - it's not always obvious from a CV! Your interviewer will spend time during your first interview speaking with you about how your skills and experience map against our grades, and discuss a salary band so that you know early what you can expect if you receive an offer from us. The technical interview will provide a deeper assessment of your skills against your mapped grade which ultimately determines whether you receive an offer and the exact salary.
     
    Location 
    We are based in the centre of Cheltenham in a stunning new build contemporary office, 5 minutes walk from the local shops and cafes.
     
    Additional Details 
    Our interview process is quick and to the point: if you look like a good fit for the role, we'll schedule a brief call to discuss it in more detail and answer any questions you may have. If that goes well, we'll arrange a technical interview to understand your level of experience. We aim to get back to you with an answer within a couple of days of the technical interview.
     
    If you’re looking for a challenging role where you can make a real impact in the world, in a friendly environment and with all the support to advance your career, click apply.

    About CoreTech Security Services

    Develops specialized cyber security research and bespoke software solutions.

    Year founded
    2020
    Employees
    70
    Organization type
    Private
    Latest investment
    Funding Round (2020)
    Headquarters
    GB

    Similar jobs

    Software Engineer roles near Cheltenham, England
    1d
    Save
    Mark Applied
    Hide
    Software Engineer - Intent Translation
    Oxford, England, United Kingdom
    HybridFull Time
    Ellison Institute of Technology
    Ellison Institute of Technology: Developing advanced technological solutions for health and climate challenges
    Professional Python experience, software engineering judgment, testing, version control, code review, experimental design, scientific data handling, reproducible analysis, and communication across scientific and engineering teams.
    Python, CLI, LIMS, ELN, Claude Code, Cursor, CI
    1d
    Save
    Mark Applied
    Hide
    Lead Software Engineer
    Cheltenham, England, United Kingdom
    £58k-£86k/yr HybridFull Time
    Northrop Grumman
    Northrop GrummanNYSE: NOC: Designs and manufactures advanced aerospace and defense systems.
    Software development experience with Java/Spring Boot/Maven or React/npm, scalable systems design, CI/CD, containers, cloud technologies, and current highest-level UK Government security clearance.
    Java, Spring Boot, Maven, React, npm, Jenkins, Kubernetes, Docker, AWS
    1d
    Save
    Mark Applied
    Hide
    Lead Software Engineer
    Cheltenham, England, United Kingdom
    £58k-£86k/yr HybridFull Time
    Northrop Grumman
    Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.
    Experience in software development, Java or frontend development, scalable systems, CI/CD, containers, deployment, cloud platforms, agile collaboration, and current highest-level UK Government security clearance.
    Java, Spring Boot, Maven, React, npm, Jenkins, Kubernetes, Docker, AWS
    2d
    Save
    Mark Applied
    Hide
    Lead Software Engineer
    Warwick, England, United Kingdom
    £75k-£90k/yr HybridFull Time
    National Grid
    National GridLondon Stock Exchange: NG: Operates electricity and natural gas transmission and distribution networks.
    Experience designing scalable software and shaping secure architecture, including microservices and event-driven systems. Programming experience in Python, Ruby, C++, or Java, plus distributed systems, automation, CI/CD, security, and team leadership.
    Python, Ruby, C++, Java, CI/CD
    3d
    Save
    Mark Applied
    Hide
    Senior Software Engineer - GammaLabs
    Newbury, England, United Kingdom
    HybridFull Time
    Gamma Communications
    Gamma CommunicationsLondon Stock Exchange: GAMA: Provider of business communication and collaboration solutions.
    Strong Java 8+ and object-oriented programming experience; RESTful APIs, SQL, database design, Git, automated testing, CI/CD, Agile, and Jira. AWS, Docker, and Kubernetes are desirable.
    Java, RESTful APIs, SQL, Git, JUnit, Cucumber, Selenium, Jira, AWS, Docker, Kubernetes
    5d
    Save
    Mark Applied
    Hide
    Risk - Software Engineer - Analyst - Birmingham
    Birmingham, West Midlands, England, United Kingdom
    OnsiteFull Time
    Goldman Sachs
    Goldman SachsNYSE: GS: Global investment banking, securities, and investment management firm.
    2+ YOEBachelor's or master's degree in a quantitative discipline, Python and SQL experience, data analysis and ETL skills, financial markets knowledge, and 2–5 years of experience.
    Python, SQL, R, Java, C++, Tableau, Alteryx, Power BI
    6d
    Save
    Mark Applied
    Hide
    Risk - Software Engineer - Analyst - Birmingham
    Birmingham, England, United Kingdom
    OnsiteFull Time
    Goldman Sachs
    Goldman SachsNYSE: GS: Provides investment banking, securities, and wealth management services globally.
    2+ YOEBachelor's or master's degree in a quantitative discipline, Python and SQL ETL and data analysis experience, financial markets knowledge, and 2–5 years of experience preferred.
    Python, SQL, R, Java, C++, Tableau, Alteryx, Microsoft Power BI
    6d
    Save
    Mark Applied
    Hide
    Associate Software Engineer
    Warwick, England, United Kingdom
    £35k/yr HybridFull Time
    MSX International
    MSX International: Provides outsourced business services and technology to automotive manufacturers.
    1+ YOEBachelor’s degree or related experience; 1–3 years in software engineering, application development, business intelligence, or related roles; Java or .NET (C#), Power BI, SQL, and relational database skills.
    Java, .NET (C#), Microsoft Power BI, SQL, Microsoft Azure, REST APIs, CI/CD