Senior Software Engineer - GB

OpSec Security, Inc.; Gateshead; Hybrid; GBP 65,000 - 90,000; Full time

Benefits offered by this job

Health Insurance

Life Insurance

Modern offices

Job summary

Crane Authentication, part of Crane NXT, is seeking a Senior Full Stack Software Engineer in Gateshead. You will contribute across the full development lifecycle, designing, building, testing, deploying, and supporting high-quality software solutions.

You should be comfortable with backend technologies (.NET or Java/Spring) and modern frontend frameworks, mentoring others, driving technical discussions, and delivering scalable systems. CI/CD and deployment processes are also part of the role.

Qualifications

• 5+ years developing commercial software.
• Experience with Git and team collaboration tools (Slack, Teams, Jira).
• Strong problem-solving and architectural thinking.
• Excellent communication and collaboration skills.
• Mentoring and supporting a high-performing team.

Responsibilities

• Work closely with Product Owners, Tech Leads and other engineers to understand product goals, explore ideas, and shape technical solutions.
• Contribute to architectural discussions, code reviews, and design sessions.
• Mentor and support engineers at all levels, helping the team develop skills and discipline.
• Participate in Agile ceremonies as part of a cross-functional Scrum team.

Skills

APIs & backend

Java/Spring

C#/NET

SQL databases

Git & collaboration

Mentoring

Architecture thinking

Communication

Tools

Git

Slack

Teams

Jira

Job description

Job Category: Software Development and Engineering

Requisition Number: SENIO001890

• Posted : October 8, 2026
• Full-Time
• Hybrid

Locations

Showing 1 location

Gateshead, NE83AE, GBR

Description

As a partner to businesses and governments, Crane Authentication offers expertise and cutting-edge innovations that protect and enhance products, secure identities, safeguard revenues and enforce compliance. Customers from different business sectors and levels of government trust our team of 1,250 people for their expertise in R&D, security design, engineering and data-driven insights. We are an integral part of Crane NXT, a $2 billion dollar business with over 5,000 associates

Position Summary

We are looking for a collaborative, engaged, and technically strongSenior Full Stack Software Engineer to join our team. You will contribute across the entire development lifecycle, designing, building, testing, deploying, and supporting high-quality software solutions.

You should be comfortable working withboth backend technologies (.NET or Java/Spring) and modern frontend frameworks, even if your primary expertise is stronger in one area. As a senior engineer, you will mentor others, drive technical discussions, and help the team deliver scalable, maintainable systems.

This role also includes contributing todeployment processes, including CI/CD pipelines and environment configuration.

Key Responsibilities

• Work closely with Product Owners, Tech Leads and other engineers to understand product goals, explore ideas, and shape technical solutions.
• Contribute thoughtfully to architectural discussions, code reviews, and design sessions.
• Mentor and support engineers at all levels, helping the team develop skills, confidence, and engineering discipline.
• Participate fully in Agile ceremonies (refinement, planning, retrospectives) as part of a cross-functional Scrum team.

Software Engineering

• Design and build backend services and APIs using both.NET (C#) and Java/Spring Boot.
• Collaborate on the design and development of microservices and distributed systems.
• Write automated tests to ensure reliability and maintainability.
• Review and improve existing systems to address bugs, performance issues, and new product requirements.
• Maintain strong code quality through pairing, reviews, automated testing, and shared engineering standards.
• Contribute to deployments using CI/CD pipelines and Octopus.
• Work with infrastructure components such as messaging systems, databases, caches, and monitoring tools.
• Help ensure services are observable, resilient, and ready for scale.

Technical Ownership

• Investigate and resolve technical issues, supporting the team through escalations when needed.
• Advocate for continuous improvement in processes, tools, architecture, and engineering practices.
• Champion maintainable, scalable solutions with a long-term perspective.

Essential Technical Skills

• Strong experience of developing APIs and backend services which use relational databases such as SQL Server or Postgres in one of the following, with a willingness to work in both:

Java / Spring: Java 8+ with Spring

C# / .NET: C# .Net Core 5+

Education & Experience

• 5+ years developing commercial software
• Experience with Git and team collaboration tools (Slack, Teams, Jira)

Knowledge, Skills & Abilities

• Proven ability to deliver enterprise-grade software with high reliability
• Strong understanding of modern engineering practices
• Excellent communication and collaboration skills
• Strong problem-solving and architectural thinking
• Passion for mentoring, knowledge sharing, and supporting a high-performing team

WHAT’S IN IT FOR YOU?

• Work for a market leading, established product company.
• Nice modern offices with great facilities.
• Health Insurance.
• Life Insurance.

Crane Authentication is part of Crane NXT

Crane NXT is a premier industrial technology company that provides proprietary and trusted technology solutions to secure, detect, and authenticate what matters most to its customers. Crane NXT has approximately 5,000 employees with global operations and manufacturing facilities in the United States, the United Kingdom, Mexico, Japan, Switzerland, Germany, Sweden, and Malta. For more information, visit www.cranenxt.com.

We value diversity at our company. Everyone that applies with the qualifications will receive consideration for employment without regard to: age, colour, national origin, citizenship status, physical or mental disability, race, religion, creed, gender, sex, sexual orientation, gender identity and/or expression, genetic information, marital status, status with regard to public assistance, veteran status, or any other characteristic protected by law.

We receive a high number of applications, so apologies if we are unable to provide specific feedback. If we feel you are a fit for the role, we’ll be in contact.