Lead Software Engineer

Addition; Bath; Hybrid; GBP 70,000 - 90,000; Full time

Benefits offered by this job

Annual performance bonus

26 days holiday + bank holidays + birthday off

£1,000 annual learning and development budget

Opportunity to work abroad for up to 4 weeks each year

Job summary

Addition is seeking a hands-on leader in Bath to oversee software engineering projects, drive AI-enabled solutions, and develop scalable software.

This role requires expertise in Python, SQL, and cloud environments, while offering an annual performance bonus, 26 days holiday, and flexible hybrid working.

Qualifications

• Strong experience leading software engineering projects through full delivery lifecycles.
• Advanced Python expertise including OOP, concurrency, recursion, and decorators.
• Experience working within cloud environments such as AWS or Azure.

Responsibilities

• Lead the end-to-end delivery of complex software engineering projects.
• Oversee design, development, testing, and release of scalable solutions.
• Mentor and support engineers, helping to grow technical capability.

Skills

Leading software engineering projects

Advanced Python expertise

Building backend services and APIs

Strong SQL skills

Experience in cloud environments (AWS/Azure)

Understanding of Docker and Linux

Implementing CI/CD pipelines

Strong communication skills

Problem-solving abilities

Education

DV clearance or eligibility

Tools

PostgreSQL

SQL Server

GitHub Actions

Azure DevOps

Job description

Join a fast-growing technology business delivering impactful data and AI solutions across complex defence environments. This is a hands‑on leadership role where you’ll shape technical direction, lead delivery teams, and build scalable software that makes a real‑world difference.

Role Overview

• Location: Bath area (3 days on‑site per week)
• Package: Competitive salary + annual bonus + extensive benefits package
• Industry: Data, AI & Software Engineering

What You’ll Be Doing

• Lead the end‑to‑end delivery of complex software engineering projects from concept through to deployment
• Oversee the design, development, testing, and release of scalable, production‑ready solutions
• Build and maintain strong relationships with clients and key stakeholders
• Develop and optimise data pipelines using Python and SQL
• Deliver AI‑enabled solutions, including systems leveraging Large Language Models
• Champion engineering best practices across version control, CI/CD, cloud deployment, and containerisation
• Mentor and support engineers, helping to grow technical capability across the team
• Coordinate project delivery across multiple workstreams, ensuring quality and accountability
• Translate business challenges into practical technical solutions and delivery strategies
• Contribute to proposals, bids, and identifying new technical opportunities
• Drive continuous improvement across engineering standards, tooling, and processes
• Provide technical leadership across both client projects and internal initiatives

Main Skills Needed

• Strong experience leading software engineering projects through full delivery lifecycles
• Advanced Python expertise, including OOP, concurrency, recursion, and decorators
• Solid experience building backend services, APIs, and data engineering pipelines
• Strong SQL skills and experience working with databases such as PostgreSQL or SQL Server
• Experience working within cloud environments such as AWS or Azure
• Strong understanding of Docker, containerisation, and Linux‑based environments
• Experience implementing CI/CD pipelines using tools such as GitHub Actions or Azure DevOps
• Confident working within Git‑based development workflows and code review processes
• Proven ability to lead technical teams and manage delivery across multiple projects
• Strong communication and stakeholder management skills
• Excellent problem‑solving, organisational, and decision‑making abilities
• Experience with C++ or Fortran would be beneficial but isn’t essential
• DV clearance or eligibility to obtain it is required

What’s in It for You

• Annual performance bonus
• 26 days holiday + bank holidays + your birthday off
• Enhanced family leave policies
• £1,000 annual learning and development budget
• Hybrid working flexibility
• Opportunity to work abroad for up to 4 weeks each year
• Choice of MacBook or high‑spec Windows laptop
• Collaborative, supportive, and entrepreneurial culture
• Exposure to varied projects, industries, and modern technologies
• Regular socials, office perks, and a genuinely close‑knit team environment

Interview Process

• 20‑minute introductory video call
• 45‑minute live coding assessment
• Final‑stage in‑person interview in London

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.