Senior Software Developer - Python

Government Recruitment Service; Greater London; On-site; GBP 69,000 - 88,000; Full time

Job summary

The Department for Business, Innovation, Science and Trade (BIST) and its DDaT directorate recruit for a Senior Software Developer (Python) role based in London. Company: Government Recruitment Service. Salary: £68,732 to £88,423 per year. Hours: Full-time.

Posting 23 Oct 2026, closing 9 Nov 2026. Join a diverse, inclusive team delivering modern digital services for UK citizens. You’ll design, build and run software end-to-end, collaborating with architects and engineers to deliver reliable,

Qualifications

• Experience designing and building high-quality software.
• Ability to work across the full software development lifecycle.
• Strong collaboration with architects and developers.

Responsibilities

• Design, build, test and maintain high-quality software, delivering new functionality and improving existing services in line with agreed architecture and coding standards
• Work across the full software development lifecycle, including development, testing, deployment, monitoring and production support
• Collaborate with multidisciplinary colleagues to translate user needs and designs into working software, iterating services based on evidence and feedback
• Work closely with Technical Architects and other developers to make informed technical decisions and identify appropriate solutions to complex problems
• Develop and maintain REST APIs, web applications, microservices and containerised applications
• Build a strong understanding of the wider service, including dependencies, data and system interactions, to improve reliability and resolve underlying technical issues
• Investigate and resolve live service incidents, identifying root causes and implementing sustainable improvements
• Build and maintain continuous integration and deployment pipelines that support reliable software delivery
• Review code, share technical knowledge and support colleagues to improve quality and consistency across the team
• Contribute to continuous improvement of engineering practices, including exploring and prototyping potential solutions where appropriate

Skills

Python

REST APIs

Microservices

Containerised apps

CI/CD

Testing

Job description

The Department for Business, Innovation, Science and Trade (BIST) helps businesses invest, innovate, export and grow across the UK. The Digital, Data and Technology (DDaT) directorate helps to deliver this by designing, building and running the services, platforms and technology that businesses and colleagues rely on every day.

Our teams work on a wide range of services and technologies, including:

• digital services that help businesses access government support, guidance and opportunities
• data and AI products that support decision making and enable innovation
• internal tools and services that help colleagues work more effectively
• secure technology and platforms that support critical government services
• cyber security services that protect systems, data and users

By joining DDaT, you'll work on services used by businesses, colleagues and citizens across the UK. You'll be part of multidisciplinary teams focused on improving services, solving complex problems and delivering better outcomes for users.

We are committed to creating an inclusive and supportive workplace. In recognition of this, we were named Best Public Sector Employer at the Women in Tech Employer Awards 2025!

As a Senior Software Developer, you will play a key role in designing, building and running robust, maintainable software that meets the needs of our users. You will work across the full software development lifecycle, from understanding requirements and shaping technical solutions through to development, deployment and supporting services in production.

Working as part of a multidisciplinary agile team, you will develop a strong understanding of the wider service and use this to solve complex technical problems, improve system reliability and make informed technical decisions. You will work closely with developers, technical architects, designers, user researchers and analysts to turn user needs into practical, high-quality digital solutions.

You will also contribute to our wider engineering culture by reviewing code, sharing knowledge and supporting colleagues. You will help us continually improve how we build and operate software, championing maintainable code, modern development practices and resilient services.

Main responsibilities

You will:

• Design, build, test and maintain high-quality software, delivering new functionality and improving existing services in line with agreed architecture and coding standards
• Work across the full software development lifecycle, including development, testing, deployment, monitoring and production support
• Collaborate with multidisciplinary colleagues to translate user needs and designs into working software, iterating services based on evidence and feedback
• Work closely with Technical Architects and other developers to make informed technical decisions and identify appropriate solutions to complex problems
• Develop and maintain REST APIs, web applications, microservices and containerised applications
• Build a strong understanding of the wider service, including dependencies, data and system interactions, to improve reliability and resolve underlying technical issues
• Investigate and resolve live service incidents, identifying root causes and implementing sustainable improvements
• Build and maintain continuous integration and deployment pipelines that support reliable software delivery
• Review code, share technical knowledge and support colleagues to improve quality and consistency across the team
• Contribute to continuous improvement of engineering practices, including exploring and prototyping potential solutions where appropriate

Proud member of the Disability Confident employer scheme

Senior Software Developer - Python

Company: Government Recruitment Service

Salary: £68,732 to £88,423 a year

Hours: Full-time

Location: London

Job type: Permanent

Posting date: 23 Oct 2026

Closing date: 9 Nov 2026

Summary

The Department for Business, Innovation, Science and Trade (BIST) helps businesses invest, innovate, export and grow across the UK. The Digital, Data and Technology (DDaT) directorate helps to deliver this by designing, building and running the services, platforms and technology that businesses and colleagues rely on every day.

Our teams work on a wide range of services and technologies, including:

• digital services that help businesses access government support, guidance and opportunities
• data and AI products that support decision making and enable innovation
• internal tools and services that help colleagues work more effectively
• secure technology and platforms that support critical government services
• cyber security services that protect systems, data and users

By joining DDaT, you'll work on services used by businesses, colleagues and citizens across the UK. You'll be part of multidisciplinary teams focused on improving services, solving complex problems and delivering better outcomes for users.

We are committed to creating an inclusive and supportive workplace. In recognition of this, we were named Best Public Sector Employer at the Women in Tech Employer Awards 2025!

As a Senior Software Developer, you will play a key role in designing, building and running robust, maintainable software that meets the needs of our users. You will work across the full software development lifecycle, from understanding requirements and shaping technical solutions through to development, deployment and supporting services in production.

Working as part of a multidisciplinary agile team, you will develop a strong understanding of the wider service and use this to solve complex technical problems, improve system reliability and make informed technical decisions. You will work closely with developers, technical architects, designers, user researchers and analysts to turn user needs into practical, high-quality digital solutions.

You will also contribute to our wider engineering culture by reviewing code, sharing knowledge and supporting colleagues. You will help us continually improve how we build and operate software, championing maintainable code, modern development practices and resilient services.

Main responsibilities

You will:

• Design, build, test and maintain high-quality software, delivering new functionality and improving existing services in line with agreed architecture and coding standards
• Work across the full software development lifecycle, including development, testing, deployment, monitoring and production support
• Collaborate with multidisciplinary colleagues to translate user needs and designs into working software, iterating services based on evidence and feedback
• Work closely with Technical Architects and other developers to make informed technical decisions and identify appropriate solutions to complex problems
• Develop and maintain REST APIs, web applications, microservices and containerised applications
• Build a strong understanding of the wider service, including dependencies, data and system interactions, to improve reliability and resolve underlying technical issues
• Investigate and resolve live service incidents, identifying root causes and implementing sustainable improvements
• Build and maintain continuous integration and deployment pipelines that support reliable software delivery
• Review code, share technical knowledge and support colleagues to improve quality and consistency across the team
• Contribute to continuous improvement of engineering practices, including exploring and prototyping potential solutions where appropriate

Proud member of the Disability Confident employer scheme

About Disability Confident

Disability Confident is a government scheme. It encourages employers to recruit and retain disabled people and those with long term health conditions.