2 Application Development jobs in the United Kingdom
Senior Principal Software Engineer - Email Security
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Job Description
Principal/Senior Principal Software Engineer – Email Security
The driving force behind our award-winning Email Security Product at Mimecast
Dive into the forefront of innovation with our Email Security engineering team. Our pioneering Email Security solution pushes on the boundaries of what’s possible, leveraging the latest technologies and tooling in AWS.
Why Join Our Team?
“Join us in tackling email processing challenges at an immense scale with our innovative Email Security team! Our MTA process billions of emails from millions of users on thousands of servers each day!” – Hiring Manager
What You’ll Do?
As Principal/Senior Principal Engineer, you will play a pivotal role in leading the development of our next-generation cloud-based email product. This role involves hands-on engagement throughout the full development lifecycle, including designing, developing, testing, deploying, maintaining, monitoring, and improving our core services. You will be responsible for driving technical excellence and innovation within the team while mentoring and coaching junior engineers.
Responsibilities
- Design new features or enhancements based on high-level architectures.
- Work on a global, highly distributed infrastructure
- High availability, mission critical Java services
- Opportunity to modernize the technology stack
- Lead backlog grooming, planning, design reviews, and code reviews.
- Deliver AWS-based Java services through CI/CD and Infrastructure as Code.
- Engage with the team through collaboration, problem-solving, and teamwork.
- Continually improve team efficiency, personal skills, and team skills.
- Take ownership and create accountability within the team.
- Lead security reviews of designs and implementations.
- Act as a technical lead within the team, fostering collaboration and teamwork.
- Apply technology trends and industry innovations to our products.
- Coach and mentor team members in areas of expertise.
Experience
- 10+ years of software development experience.
- Strong object-oriented programming skills following SOLID principles.
- Proficient in Java and experienced in building REST/HTTP microservices.
- Familiarity with Jenkins CI/CD pipelines and Terraform.
- Experience with containerization technologies such as Docker and Kubernetes.
- Proficient in AWS services.
- Proven ability to build high-volume, scalable, distributed back-end services.
- Proficient in multithreaded software engineering, with expertise in designing, implementing, and troubleshooting concurrent systems to optimize performance and resource utilization
- Proficient in leveraging AI tools, such as Cursor, to enhance software engineering practices, including automated design, code generation, and testing, ensuring high-quality and efficient development workflows.
- Excellent collaboration, influencing, negotiation, coaching, mentoring, and coalition-building skills.
- Strong verbal and written communication skills.
- A great team player with demonstrable experience delivering superior software products via Agile methodologies
- Continuous learning mindset, keeping abreast of related industry technologies, tools, and standards.
What We Bring
Join our Email Security team to accelerate your career while working with cutting-edge technologies and contributing to impactful projects for our customers. You will be immersed in a dynamic environment that recognizes and celebrates your achievements.
Mimecast offers formal and on the job learning opportunities, maintains a comprehensive benefits package that helps our employees and their family members to sustain a healthy lifestyle, and importantly - working in cross functional teams to build your knowledge!
Our Hybrid Model: We provide you with the flexibility to live balanced, healthy lives through our hybrid working model that champions both collaborative teamwork and individual flexibility. Employees are expected to come to the office at least two days per week because working together in person:
- Fosters a culture of collaboration, communication, performance and learning
- Drives innovation and creativity within and between teams
- Introduces employees to priorities outside of their immediate realm
- Ensures important interpersonal relationships and connections with one another and our community!
DEI Statement
Cybersecurity is a community effort. That’s why we’re committed to building an inclusive, diverse community that celebrates and welcomes everyone – unless they’re a cybercriminal, of course.
We’re proud to be an Equal Opportunity and Affirmative Action Employer, and we’d encourage you to join us whatever your background. We particularly welcome applicants from traditionally underrepresented groups.
We consider everyone equally: your race, age, religion, sexual orientation, gender identity, ability, marital status, nationality, or any other protected characteristic won’t affect your application.
Due to certain obligations to our customers, an offer of employment will be subject to your successful completion of applicable background checks, conducted in accordance with local law.
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Senior Application Development Cyber Security Engineer

Posted 11 days ago
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Job Description
We are seeking a seasoned Cyber Security Engineer to lead the development and integration of secure architectures for critical Transmission & Distribution (T&D) systems.
As a recognized technical authority, you will define cybersecurity strategy across hardware, embedded systems, and software-defined platforms in modern electric grids-spanning protection, control, and energy management technologies for Grid Automation business unit.
You will embed Security by Design and Cyber-Informed Engineering (CIE) principles throughout the product lifecycle, operating at the intersection of operational technology (OT) and information technology (IT). Your work will help drive regulatory compliance, product security, and support both R&D teams and utility customers in securing mission-critical infrastructure.
**Job Description**
**Key Responsibilities:**
+ Act as the cybersecurity design authority for T&D products, defining end-to-end architectures across hardware, firmware, and cloud-connected systems, advising on secure protocols, cryptography, authentication, and network hardening.
+ Translate and implement global regulatory standards (IEC 62443, IEC 61850, IEC 62351, NERC CIP) into product requirements, and lead technical strategy planning, architecture reviews, and security certification efforts.
+ Guide engineering teams through threat modeling, secure coding, SDLC best practices, and CIE adoption to mitigate cyber-physical risks affecting safety, reliability, or operations.
+ Define and support embedded and software-based security features using C/C++, Python, and modern toolchains, while collaborating on penetration testing, fuzz testing, code reviews, and security simulations.
+ Lead cross-functional initiatives with PSL, product management, compliance, field operations, and R&D to align cybersecurity objectives and ensure systems meet resilience and compliance expectations.
+ Monitor cybersecurity trends, ICS/OT threat landscapes, and emerging technologies, recommending tools and methods to enhance product security posture.
+ Partner with PSL, incident response and product security teams to support vulnerability remediation, post-incident analysis, and contribute to the creation of security documentation, including architecture specs, procedures, and training materials.
+ Represent the company in industry forums, standards bodies, and technical panels, and contribute to white papers, patents, and technical publications supporting innovation and thought leadership for Grid Automation.
**Required Qualifications:**
+ Bachelor's degree in engineering, Computer Science, Cybersecurity, or a related field.
+ Minimum of 8 years of engineering experience, with 5 years focused on cybersecurity for embedded or software-defined systems.
**Desired Characteristics:**
+ Professional certifications such as CISSP, GIAC (GPEN/GXPN), CEH, or ISA/IEC 62443 preferred.
+ Proven ability to secure OT/ICS environments, preferably within the energy or utilities sector.
+ Deep familiarity with industrial protocols (e.g., IEC 61850, DNP3, Modbus, IEEE 2030.5) and relevant cybersecurity standards.
+ Experience in embedded system development (C/C++, RTOS), as well as Linux/Windows platforms.
+ Strong hands-on background in PKI, identity management, network security appliances, and security monitoring.
+ Proficient in threat modeling, risk/vulnerability assessment, and using forensic/security analysis tools.
+ Excellent communication and stakeholder engagement skills, able to translate technical content for non-technical audiences.
+ Exposure to quality improvement methodologies (e.g., Lean, Six Sigma) is a plus.
+ Recognized as a thought leader through publications, patents, or industry involvement.
+ Willingness to travel for customer engagements, conferences, and global collaboration.
**For US Based Candidates -
The base pay range for this position is 152,400.00 - 190,000.00 USD Annual. The specific pay offered may be influenced by a variety of factors, including the candidate's experience, education, and skill set. This position is also eligible for a 15% variable incentive bonus annually. This posting is expected to close on _9/29/25._
*The Company pays a geographic differential of 110%, 120% or 130% of salary in certain areas.
Healthcare benefits include medical, dental, vision, and prescription drug coverage; access to a Health Coach, a 24/7 nurse-based resource; and access to the Employee Assistance Program, providing 24/7 confidential assessment, counseling and referral services. Retirement benefits include the GE Retirement Savings Plan, a tax-advantaged 401(k) savings opportunity with company matching contributions and company retirement contributions, as well as access to Fidelity resources and planning consultants. Other benefits include tuition assistance, adoption assistance, paid parental leave, disability insurance, life insurance, and paid time-off for vacation or illness.
General Electric Company, Ropcor, Inc., their successors, and in some cases their affiliates, each sponsor certain employee benefit plans or programs (i.e., is a "Sponsor"). Each Sponsor reserves the right to terminate, amend, suspend, replace, or modify its benefit plans and programs at any time and for any reason, in its sole discretion. No individual has a vested right to any benefit under a Sponsor's welfare benefit plan or program. This document does not create a contract of employment with any individual.
**Additional Information**
**Relocation Assistance Provided:** No
#LI-Remote - This is a remote position
GE Vernova is an Equal Opportunity Employer. Employment decisions are made without regard to race, color, religion, national or ethnic origin, sex, sexual orientation, gender identity or expression, age, disability, protected veteran status or other characteristics protected by law.
Senior Mobile Automation Engineer (Android + iOS mobile application development )
Posted 6 days ago
Job Viewed
Job Description
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Location: Toronto, Canada (5 Days Onsite)
Duration: Long Term
br>
Note: Candidate should have a strong Mobile automation experience from Finance/Banking project background rather than doing a Mobile testing role. Also, look for resource with in depth experience in API Testing experience for this role.
br>
Qualifications and Skills:
8 years of software testing experience in native iOS and Android mobile applications. br> + years of experience in functional testing of web applications.
Strong grasp of testing methodologies for all types of testing - Functional, Regression, Sanity, Smoke, White box, and Black box testing.
Experience with Atlassian products like JIRA, Xray, and Confluence.
Experience with Postman and API Testing.
Proficiency in BDD Gherkin scripting language.
Experience working closely with software development and product teams in an agile environment.
Excellent time management skills, ability to meet deadlines, and function in a fast-paced and flexible environment.
Experience in release cycle management in an agile environment.
Ability to work both independently and collaboratively in a team-oriented environment.
Strong analytical and problem-solving skills, including the ability to handle complex or ambiguous situations.
Experience managing multiple projects simultaneously in a fast-paced environment.
Good understanding of Source Code management and Version Control systems like GitHub and SourceTree.
Knowledge of Android Studio and Xcode.
Nice to have:
Experience and knowledge in the Fintech industry.
Experience using SauceLabs.
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