Junior Software Engineer (C++ Middleware & Interfaces)

About Capgemini

Capgemini is an AI-powered global business and technology transformation partner, delivering tangible business value. We imagine the future of organizations and make it real with AI, technology and people. With our strong heritage of nearly 60 years, we are a responsible and diverse group of over 420,000 team members in more than 50 countries. We deliver end-to-end services and solutions with our deep industry expertise and strong partner ecosystem, leveraging our capabilities across strategy, technology, design, engineering and business operations. The Group reported 2025 global revenues of €22.5 billion.

About the Role

Support the development, testing, integration, and maintenance of a customised C++ middleware solution and its associated software interfaces. The role provides hands-on implementation capability within a supervised engineering environment, with opportunities to develop expertise in C++, system integration, communications protocols, testing, and software configuration management.

Responsibilities

• Develop and maintain C++ software modules under the guidance of the Senior Software Engineer / Technical Lead.
• Implement middleware functions, software adapters, protocol handlers, message parsers, data-conversion logic, configuration functions, and diagnostic features.
• Support the integration of software interfaces between the middleware solution and customer, third-party, or internal systems.
• Write clean, maintainable, and well-documented C++ code in accordance with project coding standards and software-development processes.
• Develop unit tests and support integration, system, and acceptance testing activities.
• Investigate software defects, analyse logs and diagnostic data, reproduce reported issues, and support corrective actions.
• Prepare and maintain technical artefacts such as source-code documentation, test records, configuration files, software release notes, and installation instructions.
• Participate in code reviews and incorporate feedback from the Senior Software Engineer and project team.
• Use Git and approved configuration-management processes to manage source code, branches, baselines, and software releases.
• Support build, deployment, and test-environment setup activities, including Linux-based development and integration environments.
• Assist with customer demonstrations, factory acceptance testing, site integration, commissioning, and troubleshooting when required.
• Participate in technical discussions with system engineers and other disciplines to understand interface requirements, expected data flows, and integration constraints.
• Maintain awareness of software quality, cybersecurity, and configuration-control requirements relevant to the project.

Requirements

• Degree or diploma in Computer Science, Computer Engineering, Electrical/Electronic Engineering, or a related discipline.
• 2 to 3 years of relevant software-development experience
• Good foundation in C++ programming, including object-oriented design, memory management, debugging, and standard data structures.
• Basic understanding of software-development lifecycle practices, including requirements, implementation, testing, defect tracking, and version control.
• Familiarity with Git or another source-control system.
• Familiarity with Linux or willingness to develop competence in a Linux-based software-development environment.
• Ability to read technical specifications, follow structured development tasks, and document work clearly.
• Strong analytical, problem-solving, and troubleshooting skills.
• Good teamwork and communication skills.

Preferred Qualifications and Experience:

• Experience in C++, Linux, embedded systems, networking, middleware, or systems integration.
• Familiarity with TCP/IP networking, sockets, REST APIs, serial communications, or basic client-server architectures.
• Exposure to JSON, XML, YAML, CSV, or other structured data formats.
• Exposure to CMake, Makefiles, automated tests, CI/CD, Docker, or scripting using Python or Bash.
• Familiarity with unit-test frameworks for C++.
• Interest in communications systems, industrial automation, maritime systems, defence systems, IoT, robotics, or real-time software environments.

Let's talk about what's in it for you!

Passionate people are Capgemini's Ace of Spades - join us to discover a career that will challenge, support and inspire you. Working at Capgemini you'll find the rewards are more than just financial. You will work alongside some very smart and inspiring people on exciting projects and you will also enjoy incredible benefits. We offer flexible work practices and 40 hours of self-development every year with a huge selection of learning opportunities to choose from.

As 'Architects of Positive Futures', Capgemini actively supports the community in 3 ways:

Diversity and Inclusion - we believe diversity of thought fuels excellence and innovation, which is why we positively encourage applications from suitably qualified candidates regardless of their gender identity, ethnicity, sexual orientation, religion, ability, intersex status or age. To support our commitment to diversity and inclusion, we celebrate special events and days of significance that are important to our employees such as Diwali, Bastille Day, Pride, IDAHOBIT, IWD and International day of people with Disabilities. Our Employee Resource Groups Women Capgemini and OutFront support the grassroots passion of employees to drive our diversity agenda and effect change.

Digital inclusion - at Capgemini we are using our skills to drive social impact initiatives focusing on helping society address the impact of the digital and automation revolution. We also provide employees with opportunities to give back to the community through charity projects and volunteer days.

Environmental Sustainability - Capgemini joined the CDP's (Carbon Disclosure Project) prestigious 'A list' for its commitment to the Net-Zero economy. We are focusing on helping our clients transform towards more sustainable business models and committing to reduce our own carbon emissions (GHG) by 20% per employee by 2020.

Recognized by Ethisphere as one of the World's Most Ethical Companies for the last 8 years in a row, ethics and values are at the heart of Capgemini's corporate culture and business. Embedded in our DNA, our seven values - Honesty, Boldness, Trust, Team Spirit, Freedom, Fun and Modesty - have remained the same since company inception in 1967. To see how we bring these values to life, click here to listen to some of our employee’s stories.

Come join us, bring your whole self to work, create new possibilities for you, your customers and your community and help us to be Architects of Positive Futures.