Lead Software Engineer

We are seeking an experienced LEAD SOFTWARE ENGINEER to take ownership of the design, development, and delivery of advanced engineering software solutions. This is a hands-on leadership role, combining technical expertise with team leadership responsibilities, guiding developers through the full software development lifecycle while contributing directly to software architecture and implementation.

The successful candidate will have a strong background in Python development within complex engineering or scientific environments, experience working within Agile Scrum teams, and the ability to collaborate with technical stakeholders to define and deliver high-quality software products.

Key Responsibilities

• Lead and mentor a team of software engineers, fostering technical excellence and best engineering practices.
• Remain actively involved in the hands-on design, development, testing, and deployment of engineering software applications.
• Work closely with stakeholders to understand requirements and translate them into technical solutions.
• Support Agile Scrum delivery processes, including sprint planning, backlog refinement, reviews, and retrospectives.
• Contribute to product roadmap discussions and help prioritise development activities.
• Design and implement scalable, maintainable, and robust software architectures.
• Ensure software quality through code reviews, automated testing, and continuous improvement initiatives.
• Produce and maintain technical documentation including system designs, architecture documentation, user guides, and development standards.
• Collaborate with multidisciplinary engineering teams to deliver integrated technical solutions.
• Drive continuous improvement in software engineering methodologies, tools, and development practices.

Experience Required

• Strong Python development skills.
• Experience leading software development teams and technical projects.
• Strong understanding of Agile Scrum methodologies.
• Experience working closely with Product Owners, or acting in a Product Owner capacity.
• Knowledge of software architecture, design patterns, and modern development practices.
• Experience with MongoDB or similar NoSQL database technologies.
• Strong technical documentation and communication skills.
• Experience with version control systems such as Git.
• Knowledge of testing frameworks and software quality assurance practices.

With five strategic offices in Belfast, Chester, Farnborough, London and Oxford, we work in partnership with our customers UK-wide to deliver high-impact engineering solutions.

SII UK is a trusted Aerospace and Defence engineering partner, supporting the delivery of complex, mission-critical programmes while helping to shape the future of innovation across next-generation systems and technologies.

Our teams contribute daily to creating a fulfilling, stimulating and career development focused work environment.

True to our human-centred values, we are committed to making SII UK a Great Place To Work®, having been certified 5 years running.

Joining SII UK means being part of our collective goals, guided by our mission “Let’s Tech Together,” and helping to build a digital future that is sustainable, at the heart of an environment that values learning & collaboration.

Who are we?

With five strategic offices in Belfast, Chester, Farnborough, London and Oxford, we work in partnership with our customers UK-wide to deliver high-impact engineering solutions.

SII UK is a trusted Aerospace and Defence engineering partner, supporting the delivery of complex, mission-critical programmes while helping to shape the future of innovation across next-generation systems and technologies.

Our teams contribute daily to creating a fulfilling, stimulating and career development focused work environment.

True to our human-centred values, we are committed to making SII UK a Great Place To Work®, having been certified 5 years running.

Joining SII UK means being part of our collective goals, guided by our mission “Let’s Tech Together,” and helping to build a digital future that is sustainable, at the heart of an environment that values learning & collaboration.