Senior Software Developer - Python

Government Recruitment Service; Belfast City District; On-site; GBP 69,000 - 88,000; Full time

Benefits offered by this job

Disability Confident employer scheme

Job summary

Government Recruitment Service in Belfast is seeking a Senior Software Developer to design, build and run robust software across the full development lifecycle. You will work with agile teams to translate user needs into high-quality digital solutions for government services.

You will contribute to the engineering culture by reviewing code, sharing knowledge and championing maintainable code, modern practices and resilient services in production.

Qualifications

• Design, build, test and maintain high-quality software according to architecture and coding standards.
• Develop and maintain REST APIs, web applications and microservices.
• Collaborate with multidisciplinary teams to translate user needs into practical software solutions.
• Contribute to continuous improvement of engineering practices and robust services.

Responsibilities

• Design, build, test and maintain high-quality software, delivering new functionality and improving existing services in line with 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
• Work closely with Technical Architects and other developers to make informed technical decisions and identify solutions to complex problems
• Develop and maintain REST APIs, web applications, microservices and containerised applications
• Build understanding of dependencies and data interactions to improve reliability and resolve issues
• Investigate and resolve live service incidents and implement improvements
• Build and maintain CI/CD pipelines for reliable delivery
• Review code and share knowledge to improve quality
• Contribute to continuous improvement of engineering practices

Skills

Python

REST APIs

Microservices

CI/CD

Docker

Tools

Docker

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: Belfast Job type: Permanent Posting date: 23 Oct 2026 Closing date: 9 Nov 2026

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.