Lead Software Engineer

LSEG; Gdynia; On-site; PLN 265,000 - 419,000; Full time

Job summary

London Stock Exchange Group (LSEG) is building a brand-new Data as a Service team. As a Lead Software Engineer, you will define the technical direction, solve complex distributed systems challenges, and mentor engineers while delivering scalable data platform components.

You’ll work with Azure, containers, AKS, and Microsoft Fabric, drive CI/CD pipelines, and collaborate on API design to support reliable, secure, and observable services across LSEG’s global platforms.

Qualifications

• Proven ability to design and implement complex, distributed systems at scale.
• Strong programming with OO and functional patterns.
• Good understanding of relational databases and SQL (Spark SQL).
• Experience with cloud environments and modern infrastructure tooling.
• Knowledge of Data Lake concepts and change data capture techniques.
• Familiarity with AKS and Microsoft Fabric guiding architecture decisions.

Responsibilities

• Design, develop, and deploy applications across all software lifecycle phases.
• Architect and evolve distributed systems with resilience and observability.
• Build and maintain CI/CD pipelines for automated delivery and high-quality releases.
• Collaborate on API development and service-to-service communication.
• Work with Azure, containers, IaC to enable reliable deployments.
• Provide hands-on leadership through code reviews and design walkthroughs.
• Raise engineering quality by promoting reusable patterns and reducing duplication.

Skills

Distributed systems

OO & FP programming

Relational databases

SQL / Spark SQL

System design

Data Lake / Change Data Feed

AKS / Microsoft Fabric

Cloud architectures

Tools

Azure

Containers

Dev containers

IaC

CI/CD pipelines

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.

About the Role

We are building a brand-new team responsible for delivering key components to the next step in Data as a Service (DaaS) – a strategic Data Platform that will enable London Stock Exchange Group (LSEG) to unify, manage, and distribute data in a consistent and scalable way. As a Lead Software Engineer, you will define and drive the technical direction within a focused product or platform area. You will solve complex engineering challenges, guide others through code, design and architecture, and raise engineering standards across the team and organization. This role blends deep hands‑on technical delivery with technical leadership, mentoring, and shaping the long‑term quality and resilience of our systems.

What You’ll Be Doing

• Design, develop, and deploy applications across all phases of the software lifecycle, ensuring high performance, security, and scalability.
• Architect and evolve distributed systems operating in cloud environments, with a focus on resilience, observability, and efficient operations.
• Build and maintain CI/CD pipelines, ensuring smooth, automated delivery and high‑quality releases.
• Collaborate on API development, integration patterns, and service‑to‑service communication.
• Work with modern infrastructure tooling (Azure, containers, dev containers, IaC) to support fast, reliable deployments.
• Apply expertise in Data Lake, Change Data Feed, AKS and Microsoft Fabric to guide solution architecture and delivery.
• Provide hands‑on leadership, supporting engineers through code reviews, design walkthroughs, and architectural discussions.
• Raise engineering quality by influencing standard methodologies, improving reusability, and reducing duplication across the platform.

What You’ll Bring

Technical Excellence

• Proven ability to design and implement complex, distributed systems operating at scale.
• Strong programming expertise with the ability to work comfortably with object oriented and functional patterns.
• Good understanding of relational databases.
• Hands on capability with SQL, Spark SQL and core data engineering patterns.
• Strong understanding of system design, integration patterns, and secure communication between services.
• Ability to apply domain knowledge to guide team level technical decisions, improve architecture, and drive consistency.

Leadership & Mentorship

• Own delivery of critical platform capabilities and provide clear technical direction.
• Guide and mentor peers, helping them grow in coding quality, architectural thinking, and engineering standard methodologies.
• Influence technical decisions through hands on leadership, not hierarchy.
• Foster an environment of collaboration, learning, accountability, and continuous improvement.

Customer Focus

• Design solutions with an understanding of how systems behave in real world customer use.
• Take ownership of operational issues, respond quickly to incidents, and use data and feedback to enhance system reliability.

Risk Management

• Advocate for secure, safe delivery across software, infrastructure, and platform layers.
• Dive deep into trade offs, resolve blockers, and build resilience into team systems and practices from the start.

Analytical Approach

• Use data, metrics, and experimentation to validate assumptions and influence design choices.
• Encourage data driven decision making within the team to drive innovation and improvement.

Adaptability

• Promote new engineering methods, challenge outdated practices, and inspire change across teams.
• Invest in ongoing development — of your craft and the team’s capabilities — through coaching, feedback, and technical guidance.

Communication

• Tailor communication to both technical and non technical audiences.
• Explain design decisions clearly and build a shared understanding that accelerates delivery.

Why Join Us

You’ll influence the architecture and direction of key systems powering LSEG’s global platforms. You’ll work with modern technological stacks, collaborate with dedicated engineers, and contribute to solutions with real customer impact, all in an inclusive, growth focused environment.

Career Stage

Manager

Compensation Information

LSEG is committed to offering competitive Compensation and Benefits. The anticipated annual gross base salary for this position is between 265,000 zł - 419,000 zł. Please be aware base salary ranges may vary by geographic location. In addition to our offered base salary, this role is eligible for our Annual Bonus Plan (”bonus plan”). Target Bonus % will be commensurate with role level and posted career stage. Individual salary will be reflective of job-related knowledge, skills and equivalent experience.

Benefits Information

LSEG roles (excluding internships) are typically eligible for inclusion in our LSEG Benefits program. To view the benefits available for the role you're applying for, please click here. This document provides a list of benefits by country. Simply click on the country where the role is based to view the relevant details. If you have specific questions or would like further details, these can be discussed during your interview.

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.