I’m a highly motivated Senior Software Engineer with 17 years of experience designing and delivering innovative technology solutions across multiple industry domains. I specialize in Java and related frameworks and have a strong knowledge of containerization and cloud platforms such as AWS and GCP. I take pride in building and leading teams, mentoring engineers, and managing stakeholder expectations effectively. Throughout my career, I’ve contributed to multiple sectors including FinTech, software, and aerospace, with experience ranging from backend development and cloud migration to team leadership and project management. I’m passionate about delivering high-quality, tested software and fostering a culture of continuous improvement and collaboration.

Martyn Cassidy

I’m a highly motivated Senior Software Engineer with 17 years of experience designing and delivering innovative technology solutions across multiple industry domains. I specialize in Java and related frameworks and have a strong knowledge of containerization and cloud platforms such as AWS and GCP. I take pride in building and leading teams, mentoring engineers, and managing stakeholder expectations effectively. Throughout my career, I’ve contributed to multiple sectors including FinTech, software, and aerospace, with experience ranging from backend development and cloud migration to team leadership and project management. I’m passionate about delivering high-quality, tested software and fostering a culture of continuous improvement and collaboration.

Available to hire

I’m a highly motivated Senior Software Engineer with 17 years of experience designing and delivering innovative technology solutions across multiple industry domains. I specialize in Java and related frameworks and have a strong knowledge of containerization and cloud platforms such as AWS and GCP. I take pride in building and leading teams, mentoring engineers, and managing stakeholder expectations effectively.

Throughout my career, I’ve contributed to multiple sectors including FinTech, software, and aerospace, with experience ranging from backend development and cloud migration to team leadership and project management. I’m passionate about delivering high-quality, tested software and fostering a culture of continuous improvement and collaboration.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
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Language

English
Fluent

Work Experience

Senior Developer at Scalable
August 31, 2025 - August 26, 2025
Contributed to the development of a high throughput User Experience data collection and analysis tool. Played a key role in architecture utilizing Java and AWS to transition legacy functionality into an AWS cloud-based offering. Served as lead developer for API Gateway, CloudFormation, and AWS secret management. Collaborated closely with QA and PM teams to triage and resolve customer issues rapidly. Managed stakeholder communications from design through deployment while mentoring other developers.
Senior Java Developer at Send Technology Solutions
November 30, 2024 - August 26, 2025
Led backend development of a real-time analytics solution leveraging Java, Spring, MySQL, and AI to supply underwriters with rapid risk insight. Refined third-party API interactions to enhance audit capabilities and accuracy. Supported project management with refining requirements, task prioritization, and estimation. Participated in customer meetings to provide technical overviews and ensured API contract consistency with frontend developers for rapid data access.
Senior Kotlin Developer at Zencargo
January 31, 2023 - August 26, 2025
Designed and developed a Zanzibar-based authorization micro-service using Kotlin and GraphQL. Created and refined Auth0 rule packages for the authorisation framework. Designed and implemented APIs to integrate legacy systems with the new micro-service ensuring smooth data flow. Utilized leadership skills to mentor junior developers and led knowledge sharing sessions.
Senior Software Engineer at Auguration Tech (formerly Hidden Depth AI)
April 30, 2022 - August 26, 2025
Coordinated with the CEO to recruit and build an engineering team. Led architecture and development of a machine learning quantitative framework for sports betting covering full SDLC from design to deployment. Designed and managed MySQL and PostgreSQL databases. Developed high concurrency data ingest pipelines from APIs and local storage. Established company coding standards and introduced CI/CD. Managed tooling and infrastructure. Mentored team and managed a team of 4 engineers conducting regular 1-to-1s and career development.
Senior Backend Engineer at Appsbroker
June 30, 2018 - August 26, 2025
Built scalable internal base projects using Java, Spring, Docker, and Kubernetes for bespoke external client solutions. Transitioned to technical lead, making architectural decisions and working with stakeholders on roadmap for a FinTech financial workflow and audit system. Demonstrated leadership and mentoring by onboarding and upskilling team members. Worked with project managers, scrum masters, and clients to meet sprint goals.
Senior Software Engineer / Scrum Master at Raytheon
April 30, 2017 - August 26, 2025
Worked as a full-stack developer in fast-paced agile environment developing new software features. Refactored legacy Java and C++ data processing applications improving processing times by 20% and output quality. Utilized Scrum Master certification to optimize workflows achieving 100% sprint acceptance on internal products. Led team of ~20 engineers providing guidance and resolving pastoral/technical issues. Facilitated Scrum ceremonies and sprint planning.
Analyst Programmer at Target Group
September 30, 2015 - August 26, 2025
Contributed to development of new insurance products using Java, JSF, Hibernate, and MySQL on core and bespoke client projects. Resolved customer issues promptly and developed strong problem-solving and communication skills through direct interaction. Provided on-call release support making rapid decisions during deployment.
Software Engineer at Goodrich ISR Systems
June 30, 2012 - August 26, 2025
Used core Java skills contributing to information cataloguing software. Adapted quickly to new languages including Python, C++, and Perl. Worked collaboratively in teams adhering to global standards such as STANAG 4559. Maintained detailed logs for documentation and knowledge sharing.
Senior Developer at Scalable
August 1, 2025 - August 26, 2025
Contributed to the development of a high throughput User Experience data collection and analysis tool. Played key role in architecture team migrating legacy functionalities to AWS cloud platform utilizing Java and AWS technologies. Served as lead developer for API Gateway, CloudFormation, parameter and secret management in AWS. Collaborated closely with QA and project management to quickly triage and resolve customer issues. Managed stakeholder communications and mentored developers to ensure quality delivery.
Senior Java Developer at Send Technology Solutions
November 1, 2024 - August 26, 2025
Led backend development of a real-time analytics solution using Java, Spring, MySQL, and AI to provide underwriters with key risk insights. Improved integration with third-party APIs enhancing auditing and result confidence. Assisted Project Manager with requirement refinement, task estimation and prioritization. Attended customer meetings to provide technical guidance. Coordinated with frontend developers to ensure API contracts and rapid data access.
Senior Kotlin Developer at Zencargo
January 1, 2023 - August 26, 2025
Designed and developed a Zanzibar-based authorization micro-service using Kotlin and GraphQL. Created and refined Auth0 rules for granular authorization control. Implemented APIs for legacy system integration ensuring smooth data flow. Mentored junior developers and facilitated knowledge sharing sessions to build team strength.
Senior Software Engineer at Auguration Tech (formerly Hidden Depth AI)
April 1, 2022 - August 26, 2025
Collaborated with CEO to recruit and build an engineering team. Created and managed product roadmap. Led architecture and full SDLC development of a machine learning quantitative framework for sports betting. Designed and maintained MySQL and PostgreSQL databases. Leveraged concurrency for efficient data ingestion from APIs and storage. Established coding standards and introduced CI/CD. Oversaw tooling, hardware, DevOps and mentoring, fostering quality and continuous improvement. Managed a team of 4 engineers, conducting 1-to-1s and growth planning.
Senior Backend Engineer at Appsbroker
June 1, 2018 - August 26, 2025
Built scalable internal base projects using Java, Spring, Docker, and Kubernetes that served as foundations for bespoke client solutions. Transitioned to technical lead, making architectural decisions and collaborating with stakeholders to drive product roadmap development for a financial workflow auditing package in FinTech. Mentored and onboarded team members to ensure smooth project delivery and knowledge transfer. Worked closely with project managers, scrum masters, and clients to manage sprint goals and expectations.
Senior Software Engineer / Scrum Master at Raytheon
April 1, 2017 - August 26, 2025
Worked as a full-stack developer in an agile environment contributing to the full software lifecycle. Refactored legacy Java and C++ data processing application to reduce processing time by 20% and enhance output usability. Supported and mentored junior team members. Leveraged Scrum Master certification to optimize team workflows, achieving 100% sprint acceptance rate. Facilitated Scrum ceremonies and effectively managed a team of about 20 engineers, resolving pastoral, technical, and logistical issues.
Analyst Programmer at Target Group
September 1, 2015 - August 26, 2025
Supported development of new insurance system with Java, JSF, Hibernate, and MySQL. Worked on core and bespoke client codebases. Resolved customer issues promptly, developed new features, and provided on-call out of hours release support. Engaged in direct customer communication for rapid deployment decisions and issue resolution.
Software Engineer at Goodrich ISR Systems
June 1, 2012 - August 26, 2025
Contributed core Java development to a key information cataloguing application. Adapted quickly to different programming languages such as Python, C++, and Perl. Worked within a team using global standards like STANAG 4559 to translate requirements into code. Maintained detailed logs for documentation and knowledge sharing.
Senior Developer at Scalable
August 1, 2025 - August 26, 2025
Contributed to the development of a high throughput User Experience data collection and analysis tool. Served as a key member of the architecture team transitioning legacy systems to an AWS cloud-based platform. Led development on API Gateway, CloudFormation, and parameter and secret management in AWS. Collaborated with QA and product management to resolve customer issues rapidly. Mentored developers and liaised with stakeholders to implement new features from design through deployment.
Senior Java Developer at Send Technology Solutions
November 1, 2024 - August 26, 2025
Led backend development of a real-time analytics solution using Java, Spring, MySQL and AI to provide underwriters with key risk indicators. Improved third-party API interactions to boost auditing confidence. Supported project management in refining requirements and task prioritization. Attended customer meetings to provide technical insight and worked with frontend developers to ensure API contract consistency and rapid data access.
Senior Kotlin Developer at Zencargo
January 1, 2023 - August 26, 2025
Designed and developed a Zanzibar-based authorization microservice with Kotlin and GraphQL. Created and refined Auth0 rules packages for Zanzibar authorization. Implemented communication APIs between legacy applications and the new microservice ensuring smooth data flow. Mentored junior developers and facilitated knowledge sharing sessions.
Senior Software Engineer at Auguration Tech (formerly Hidden Depth AI)
April 1, 2022 - August 26, 2025
Worked closely with the CEO to build and lead an engineering team, managing recruitment and creating the product roadmap. Led the architecture and development of a machine learning quantitative framework for sports betting, covering the full SDLC. Designed and maintained MySQL and PostgreSQL databases and implemented data ingestion pipelines using concurrency. Introduced company-wide coding standards and CI/CD practices. Evaluated and managed tooling and infrastructure. Mentored team members on SDLC, technology stack, and DevOps. Managed a team of 4 engineers with regular 1-to-1s and career goal setting.
Senior Backend Engineer at Appsbroker
June 1, 2018 - August 26, 2025
Developed scalable internal base projects using Java, Spring, Docker, and Kubernetes as foundations for bespoke client solutions. Transitioned into a technical lead role, responsible for architectural decisions and product roadmap development for a financial workflow and algorithm release auditing system in FinTech. Mentored junior and apprentice developers ensuring effective onboarding and team skill development. Collaborated with stakeholders and clients to meet sprint goals and manage expectations.
Senior Software Engineer / Scrum Master at Raytheon
April 1, 2017 - August 26, 2025
Contributed as a full-stack developer enhancing legacy data processing software using Java and C++, achieving a 20% reduction in processing time and improving output usability. Supported and mentored junior developers and collaborated closely with technical and business stakeholders. Utilized Scrum Master certification to improve team processes and achieve a 100% sprint acceptance rate. Facilitated Scrum ceremonies and managed a team of approximately 20 engineers, addressing pastoral, technical and logistical challenges.
Analyst Programmer at Target Group
September 1, 2015 - August 26, 2025
Developed a new insurance platform using Java, JSF, Hibernate, and MySQL, working on core code and bespoke client customizations. Delivered prompt issue resolutions and new feature development. Developed customer interaction skills through direct support and on-call release responsibilities including rapid decisions on deployment stability and rollback.
Software Engineer at Goodrich ISR Systems
June 1, 2012 - August 26, 2025
Applied core Java skills in development and maintenance of key information cataloguing applications. Adapted quickly to multiple programming languages including Python, C++, and Perl. Worked collaboratively adhering to global standards like STANAG 4559 ensuring accurate requirements implementation and thorough documentation for knowledge sharing.

Education

BEng Computer Hardware and Software Engineering at Coventry University
September 1, 2005 - June 30, 2008
AVCE Information & Communication Technology; 2 A-Levels (Electronics, Law) at King Edward VI College (Nuneaton)
September 1, 2003 - June 30, 2005
AS-Level History at King Edward VI College (Nuneaton)
September 1, 2003 - June 30, 2004
9 GCSEs and 1 GNVQ at St. Thomas More R.C. School (Nuneaton)
September 1, 1998 - June 30, 2003
BEng Computer Hardware and Software Engineering (1st class Hons) at Coventry University
January 1, 2005 - January 1, 2008
AVCE Information & Communication Technology, 2 A-Levels (Electronics, Law) at King Edward VI College (Nuneaton)
January 1, 2003 - January 1, 2005
AS-Level History at King Edward VI College (Nuneaton)
January 1, 2003 - January 1, 2004
BEng Computer Hardware and Software Engineering at Coventry University
January 1, 2005 - January 1, 2008
AVCE Information & Communication Technology at King Edward VI College (Nuneaton)
January 1, 2003 - January 1, 2005
A-Level Electronics at King Edward VI College (Nuneaton)
January 1, 2003 - January 1, 2005
A-Level Law at King Edward VI College (Nuneaton)
January 1, 2003 - January 1, 2005
AS-Level History at King Edward VI College (Nuneaton)
January 1, 2003 - January 1, 2004

Qualifications

Certified Professional Scrum Master Level 1 (Scrum.org)
January 11, 2030 - August 26, 2025
Certified Professional Scrum Master Level 1
January 11, 2030 - August 26, 2025
Certified Professional Scrum Master Level 1
January 11, 2030 - August 26, 2025

Industry Experience

Software & Internet, Financial Services, Professional Services, Government, Transportation & Logistics, Other