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Senior Software Engineer; C​/C++

Job in Stevenage, Hertfordshire, SG1, England, UK
Listing for: iO Associates
Full Time position
Listed on 2026-07-21
Job specializations:
  • Software Development
    Software Engineer, Senior Developer
Salary/Wage Range or Industry Benchmark: 80000 - 110000 GBP Yearly GBP 80000.00 110000.00 YEAR
Job Description & How to Apply Below
Position: Senior Software Engineer (C/C++)

Senior Software Engineer (C/C++) Organisation Overview

Our Client is a pioneering technology company specialising in advanced test and measurement solutions for network performance and network-dependent applications. Operating within the innovative tech industry, they are renowned for their cutting-edge products that help clients validate and optimise their network operations. The company fosters a dynamic and collaborative environment that values innovation, professional growth, and employee wellbeing. Known for a strong commitment to engineering excellence and customer satisfaction, it is a great place to build a rewarding career in high-performance software development.

Role

Summary

Due to strategic growth, Our Client is seeking an experienced Senior Software Engineer to join their Research & Development team. This key role focuses on developing and enhancing their flagship network emulation product family. It offers a fantastic opportunity to work on impactful, high-performance software solutions with a talented team of engineers. The position plays a strategic role in ensuring the products remain at the forefront of technology, supporting ongoing innovation and customer success.

Responsibilities
  • Lead the design, implementation, and maintenance of complex backend solutions for new product features, taking full ownership from concept to deployment.
  • Collaborate closely with product owners to translate high-level requirements into functional technical deliverables.
  • Contribute to system architecture, ensuring solutions are scalable, flexible, and maintainable as requirements evolve.
  • Estimate development timelines based on functional specifications and deliver high-quality, timely software releases.
  • Support quality assurance activities, including code reviews, testing, and documentation to deliver robust solutions aligned with customer needs.
Qualifications
  • Bachelor’s degree or higher in Computer Science, Software Engineering, or a related field.
  • A minimum of 5 years’ professional experience in software development, with a focus on performance-critical systems.
  • At least 2 years’ expertise working within a Linux environment, utilising GNU toolsets such as gcc and gdb.
  • Proven experience in mentoring and supporting fellow software engineers.
  • Strong proficiency in C++, with a solid understanding of object-oriented programming principles.
  • Practical knowledge of network programming, multithreading, and concurrency.
  • Experience in Python programming for scripting and automation.
  • Excellent logical, analytical, and problem-solving abilities.
  • Ability to decompose complex problems and deliver practical solutions within tight deadlines.
  • Effective communicator with strong written and verbal skills.
  • Hands‑on experience designing automated CI/CD pipelines using tools like Jenkins and Git Hub Actions.
  • Knowledge of high-performance or real-time systems development.
  • Familiarity with Data Plane Development Kit (DPDK) programming.
  • Experience with containerisation technologies such as Docker and orchestration platforms.
  • Knowledge of Terraform and AWS cloud services.
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Position Requirements
10+ Years work experience
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