Senior Software Engineer

AtkinsRéalis; Cardiff; Hybrid; GBP 125,000 - 150,000; Full time

Job summary

A leading engineering consultancy in Wales is seeking a Senior Software Engineer to take technical ownership of projects and lead teams in delivering advanced digital solutions. The ideal candidate will demonstrate strong programming capabilities in C#, Python, and JavaScript, as well as experience with Agile and DevOps practices. This role offers opportunities for hybrid working and a commitment to professional development and diversity.

Benefits

Competitive salaries

Employee rewards

Training and professional development

Flexible holiday allowances

Hybrid working culture

Qualifications

• Significant professional experience in the engineering sector.
• Proven leadership in technical delivery on complex projects.
• Proficiency in modern web application development.

Responsibilities

• Lead technical delivery and coordinate interfaces.
• Define secure architectures for projects.
• Drive integration strategies to enhance automation.

Skills

C#

Python

JavaScript/HTML/CSS

Angular

React

Blazor

SQL

Azure

Agile

DevOps

CI/CD

API Integration

Microsoft Power Platform

Communication

Job description

Senior Software Engineer

As a Senior Software Engineer, you will take technical ownership of projects and lead teams to deliver advanced digital solutions for engineering and transportation projects. You'll define architecture, drive integration of software and data platforms, embed "safe by design" principles, and coach engineers to raise delivery quality.

Your responsibilities will include:

• Leading technical delivery and coordinating interfaces across multiple disciplines.
• Defining secure, scalable architectures and setting assurance approaches for projects.
• Driving integration strategies that improve automation, reporting, and decision-making.
• Championing Agile and DevOps practices; fostering continuous improvement and delivery quality.
• Coaching and mentoring engineers; contributing technical narratives and pricing input to bids.
• Presenting complex technical solutions to clients and stakeholders with clarity and confidence.

This role offers the opportunity to influence technical strategy and collaborate across the UK and internationally to deliver integrated, future-ready solutions.

Qualifications

We are seeking a professional Senior Software Engineer who combines advanced technical expertise with leadership capability. The ideal candidate will:

• Take ownership of technical outcomes and lead teams within their discipline.
• Communicate complex concepts clearly to clients and stakeholders, building trusted relationships.
• Instill good engineering practices, including security, quality, and "safe by design" principles.
• Show resilience, adaptability, and a proactive approach to problem-solving and continuous improvement.
• Mentor engineers and contribute to technical strategy and innovation.

Essential skills (There may be many, not all required):

• Significant professional experience, ideally within the engineering sector, with a track record of leading technical delivery on complex projects.
• Strong programming capability (e.g., C#, Python, JavaScript/HTML/CSS) and proficiency in modern web application development (e.g., Angular, React, or Blazor).
• Advanced competence in SQL/database architecture and integration with cloud platforms (Azure preferred).
• Practical knowledge of Agile, DevOps, and CI/CD with emphasis on engineering quality and traceability.
• Ability to automate workflows and integrate applications through APIs (e.g., Python, PowerShell).
• Proficient at designing secure, scalable architectures, technical assurance, and system integration.
• Experience leveraging Microsoft Power Platform (e.g., Power BI, PowerApp, Power Automate) to accelerate reporting and automation.
• Experience reviewing and assuring technical deliverables against standards and compliance.
• Excellent communication and presentation skills for client and team leadership including mentoring engineers.

Desirable skills:

• Chartered or Incorporated status with a recognised institution (e.g., IET, ICE, BCS) or demonstrable equivalent professional standing would be advantageous.
• Certifications in cloud technologies (e.g. Azure), Agile, or Scrum.
• Experience managing technical interfaces across multiple disciplines, following governance processes, and delivering technical training.
• Knowledge of transportation or engineering-related applications and experience developing plugins / working with APIs for geometry-based solutions within CAD software.

About AtkinsRéalis

AtkinsRéalis' UK Transportation business brings together the expertise of our Highways, Rail, and Local Transport teams into a single, collaborative network of over 3,000 talented engineers, planners, and consultants. With our unique breadth of services and global scale, we are recognised as one of the leading transportation infrastructure consultancies in the UK and internationally. We are passionate about shaping the future of mobility—combining engineering excellence with digital innovation to deliver sustainable, cutting‑edge solutions for our clients.

We also nurture a culture of diversity and inclusion. At AtkinsRéalis, we seek to hire individuals with diverse characteristics, backgrounds and perspectives. We strongly believe that world‑class talent makes no distinctions based on gender, ethnicity or national origin, sexual identity and orientation, age, religion or disability, yet enriches itself through these differences.

Equal Employment Opportunity

We are committed to providing equal employment opportunity for all employees and applicants. The company is an equal opportunity employer.

Benefits and Rewards

Explore the rewards and benefits that help you thrive at every stage of your life and career. Enjoy competitive salaries, employee rewards, and a brilliant range of benefits you can tailor to suit your own health, wellbeing, financial and lifestyle choices. Take advantage of opportunities for training and professional development to grow your skills and expertise. Experience hybrid working culture and flexible holiday allowances to balance a great job and fulfilling personal life.