We are seeking a high-achieving developer to join our Offensive Security Operations team (OSO). This role will focus on automating processes and building tools to drive down cyber security risk. You will have the opportunity to innovate, build for the future, and make a direct impact on our security landscape! 

OSO conducts internal security testing exercises and leads key initiatives to identify and mitigate cyber security risks. However, to improve our business-as-usual activities, we require additional automation and custom tooling. Your contributions will be critical in streamlining operations, automating high impact security checks, and supporting the team’s long-term success. 

Our environment is cloud-native, primarily AWS based with a mature development ecosystem and well-established standards. 

 Responsibilities  

• Gather user requirements, decipher the needs and expectations of internal and external customers, and translate them into effective solution designs. 

• Maintain regular communication with partners, providing updates and collecting feedback for continuous improvement. 

• Implement and deliver solutions within agreed timeframes. 

• Fully test services including unit tests and user acceptance tests.  

• Provide full documentation ensuring there are appropriate artefacts for maintaining, extending and using your work in your absence. 

• Ensure all services align with LSEG security standards, team quality controls, and validated approaches. 

• Collaborate with partner teams to integrate security measures into all stages of the development lifecycle and existing tooling. 

• Continuously evaluate and improve quality and security processes, policies and documentation based on lessons learned and industry developments where possible through automation. 

• Communicate sophisticated technology concepts and solutions clearly and effectively to technical and non-technical audiences through reports, presentations, and documentation. 

• Demonstrate strong active listening skills and provide constructive feedback to colleagues and partners 

Required Experience & Skills 

Required Qualification: 

• Bachelor's Degree or equivalent experience in Information Systems / Technology, Computer Science / Engineering or equivalent field of study. 

Core technical skills 

• Proven experience in crafting design documents 

• Proven experience with Python 3.7+ and VueJS 2 or 3 

• Proven experience with API Development (Flask API or any) 

• Proven experience with CLI tool development (Cleo or any) 

• Proven experience with Unit testing / Integration / Behavioral testing 

• Proven experience in maintaining complete software development lifecycle 

• Proven experience with IaC technology to maintain cloud infrastructure 

• Proven experience with setting up and managing resources in cloud hosting solutions (AWS preferred) 

• Proven experience with PowerShell and/or Bash Scripting 

• Proven experience with containerisation 

• Solid exposure to different software architectures  

• Proven experience with RDBMS databases or NoSQL, preferably with MySQL/PostgreSQL or similar 

• Proven experience with Git repository management - we use Gitlab / Git 

• Proven experience with Static analysis tooling 

• Proven experience with CI / CD 

• Any knowledge of Azure / Graph API Is a bonus 

• Good understanding of UI/UX 

Required Professional Attributes and Demeanour 

• Strong analytical and problem-solving skills with keen attention to detail (comfortable investigating issues on production) 

• Strong understanding of security vulnerabilities and common software engineering flaws.  

• Comfortable with Agile practices (Daily standups, retros, demoes) 

• A disliking for silo operations 

• Comfortable with demoes showcasing progression of work. 

• Evidence driven, methodical and incremental approach over future proofing approach 

• Proficiency with designing software and discussing with collaborators over contributing a solution to code 

• Great teammate and able to self-organise is vital 

• Proactive over reactive 

• Estimation, Planning and maintenance of the backlog 

• Comfortable exploring and adopting out of the box solutions including outside of immediate expertise. 

• Taking challenge as an opportunity 

• Able to push back over overcommitting and underdeliver 

• A kind, collaborative personality while being firm on delivering work and driving progress. 

This is a great opportunity for an experienced software engineer looking to work in a highly dynamic security-focused team. If you have a passion for automation, security, and innovative problem-solving, we would love to hear from you! 

We're proud to have been recognised as a Great Place to Work® in India ‘25

Career Stage:

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.

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