Contract - Senior Full Stack Developer (Expert) - Belfast
Confirmed on the employer's own hiring board on Oct 10, 2026. First seen by Alion on Oct 9, 2026. Deloitte scores B on the Alion truth index.
Job Title: Senior Full Stack Developer - Expert (contract)
Location: Belfast. Travel to the Belfast office 3 days a week
Duration: 11 months
Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer
Day Rate: Competitive (Inside IR35)
Deloitte
Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.
The Role
We are looking for Senior Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position requires a solid understanding of Development and SDLC as per the tech listed below, preferably with Financial Services experience.
Your professional experience
- Minimum of 10 years Full Stack Development experience (preferably within Financial Services)
- Developer experience across multiple languages - Java, Python, Go, Kotlin etc.
- Experience of engineering Cloud platforms at scale in AWS and GCP
- Led engineering across CICD / SDLC and IAC pipelines (e.g. Terraform and Harness)
- Technical expert of cloud services, such as Mongo Atlas, Aurora, EKS, Lambda, Networking, landing zones, VPCs, Storage, Messaging, APIs, Event driven architecture
- Extensive application engineering / software development background
- Extensive experience with Java Spring Boot frameworks and microservices design patterns.
- Solid understanding of relational (SQL) and document-oriented (NoSQL) database technologies.
- Experience building secure, scalable REST APIs and integrating with cloud-native platforms.
- Passion for engineering excellence: clean code, automated testing, and observability practices.
- Experience with containerization (Docker/Kubernetes) and cloud-based deployment models.
- Platform engineering background leading teams and managing platforms at scale
- Extensive experience in engineering services and platforms to meet security and risk controls
- Cloud security expertise, definition of controls, OPA / Sentinel / Wiz
- Excellent communicator, mentor and execution driven
- Expert with Test driven development, automation, Vault and secrets management
- Extensive experience with Identity and Access management, Security Control Policies etc
Deliverables: Responsibilities but not limited to:
- Develop and implement robust software codebases across specified programming languages (e.g., Java, Python, Go, Kotlin).
- Engineer, deploy, and maintain scalable cloud platforms and applications on AWS and GCP.
- Establish and configure Identity and Access Management (IAM) solutions and security control policies.
IR35
As a means of managing tax, commercial and reputational risks, Deloitte prohibits the use of Associates through Personal Service Companies (‘PSCs’). All Associates must contract under PAYE arrangements through a Deloitte approved ‘Employment Company’ (aka ‘umbrella company.’)