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Senior Software Developer (C++)

LSEG • Romania, Cluj - 21 Decembrie 1989 Boulevard, Bucharest, Romania

No Relocation

Posted: May 19, 2026

Job Description

About Us:

LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services – and our open-access model – we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity.

LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ 25,000 people globally, more than half located in Asia Pacific.

Role Summary:

This position is for a Senior Software Engineer who will be accountable for the design and development of a Real-Time SDK as well as deployment of surrounding server side infrastructure with expertise in infrastructure as code, deployment automation, management and monitoring to facilitate contributing to or consuming real time financial content.

You will work with local/remote development team(s) to define software requirements, do technical design and implement software solutions. In this role, you should be able to work independently with little supervision. Your overall goal will be to develop high-quality software that is aligned with user needs and business goals.

What You’ll Be Doing:

Creating product design for features using high level requirements and documenting design.
Producing, testing and debugging code based on design of Real-Time library features in C and C++
Fixing issues raised by customers
Design and develop high-quality software and associated documentation
Provide time & complexity estimates for given software feature implementation
Build unit tests for your code for best coverage and review QA test plans which exercise the changes
Identify, prioritize and complete tasks in a timely manner
Develop and maintain tools and applications by producing clean, efficient code that follows open sourcing standards
Automate tasks through appropriate tools and scripting
Review and debug code
Perform validation and verification testing
Collaborate with internal teams and vendors to fix and improve products
Collaborate with support to isolate issues in product and make fixes
Document development phases and monitor systems
Ensure software is up to date with the latest technologies and standards
Deploy containerized products into Azure or AWS or other cloud environment

What You’ll Bring:

Must have

Bachelor’s Degree in Computer Science, Computer Engineering or equivalent degree. MS in Computer Science/related degree is a plus
Proven experience as a Senior Software Engineer with extensive experience in software development.
Strong knowledge of selected programming languages: C, C++
Knowledge of web socket and JSON frameworks
Knowledge of TCP/IP and UDP multicast network protocols
Knowledge of GitLab or GitHub or other source control system
Knowledge of Jira
Knowledge of Agile methodology
Experience with various operating systems (Linux, Windows) and cross platform development.
Excellent organizational skills
Analytical mind with problem-solving skill

Nice to have

Familiarity with large scale deployments: Kubernetes, Docker, Terraform
Familiarity with CI/CD pipelines and associated scripting
Knowledge in other programming languages like Java, C#, Ruby, R, Go, Node.js, and Perl is a plus.
Knowledge of CMake is a plus
Exposure to AI to optimize development tasks is a plus

Benefits:

We are looking for intellectually curious people, passionate about the bigger picture of how technology industry is evolving, ready to ask difficult questions and deal with complicated scenarios! If you are creative and a problem solver, this is the place to be as will be supporting you to fast-forward your career!

We maximise each employee’s potential through personal development through a wide range of learning tools both formal and informal. We believe in remunerating our people with competitive salaries and a range of attractive benefits such as:

25 days’ holiday per year
1 additional day off for your Birthday
Annual wellness allowance
Share Purchase Plan
Medical Health Insurance
Medical Subscription (preventive medical services)
Life insurance
Pillar 3 Private Pension
Meal Vouchers
Flexible Benefits
Bookster
Volunteering Events
All LSEG colleagues with at least one year’s continuous service, who become parents, are now entitled to at least 26 weeks’ paid leave, and the option to return to work on a phased basis, in relation with specific company’s policy and guidelines

Career Stage:

Senior Associate

London Stock Exchange Group (LSEG) Information:

Join us and be part of a team that values innovation, quality, and continuous improvement. If you're ready to take your career to the next level and make a significant impact, we'd love to hear from you.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject.

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.

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