T24 Senior Software Engineer

Stott and May; London; On-site; GBP 200,000 +; Full time

Job summary

A leading company is seeking a highly experienced Senior Software Engineer specializing in Temenos Transact (T24). Your role will involve designing and delivering impactful software solutions, mentoring the team, and promoting best practices in a fast-paced agile environment. If you possess deep expertise in T24 and thrive on collaboration, we want to hear from you.

Qualifications

• Deep hands-on experience with T24 including L3 code development.
• Demonstrated success across the full software development lifecycle.
• Strong background in agile methodologies (Scrum, Kanban).

Responsibilities

• Design, develop, and deliver high-quality software solutions using T24 technologies.
• Guide and support the team throughout the development lifecycle.
• Conduct peer reviews and offer constructive feedback on code.

Skills

Temenos Transact (T24) Expertise

InfoBasic

TAFJ componentised code

OFS processing

APIs

SWIFT

Securities Trading

Agile methodologies

DevOps practices

Job description

T24 Senior Software Engineer

*outside IR35*

Start: ASAP
Duration: 6 months+
Location: Central London 3 days per week
Pay: outside IR35, up to £550 p/day

We are seeking a highly experienced and capable Senior Software Engineer with deep core knowledge of Temenos Transact (T24). You will play a key role in the design and delivery of robust software solutions that directly influence business outcomes and shape the ongoing evolution of the T24 technology strategy.

This is a hands-on engineering role, ideal for someone who is technically strong, collaborative by nature, and passionate about clean, extensible, and supportable code. If you thrive in an agile, fast-paced environment and enjoy working on systems that have real impact, we’d love to hear from you.

Key Responsibilities
- Design, develop, and deliver high-quality software solutions using T24 technologies
- Guide and support the team throughout the development lifecycle
- Promote continuous delivery practices including iterative development, test automation, and frequent releases
- Provide mentorship and technical leadership across the team
- Write clean, efficient code with appropriate documentation and unit testing
- Conduct peer reviews and offer constructive feedback on code and technical designs
- Champion engineering excellence and help shape team culture and best practices

Essential Skills & Experience
- Temenos Transact (T24) Expertise
- Deep hands-on experience with T24 including L3 code development
- Proficient with InfoBasic, TAFJ componentised code, and OFS processing
- Experienced with version APIs, enquiry APIs, Core API hooks, and multi-thread routines
- Strong knowledge of T24 customisation, data model, and Oracle storage
- Solid understanding of SWIFT, delivery advice workflows, and corporate actions
- Working knowledge of Securities Trading, administration and related modules

Engineering & Delivery
- Demonstrated success across the full software development lifecycle
- Strong background in agile methodologies (Scrum, Kanban), story writing and backlog grooming
- Advocate for testability and modern testing approaches including shift-left principles
- Experience with CI/CD tools and DevOps practices
- Strong understanding of system integration patterns and related technologies

Desirable Experience
- Familiarity with Temenos Integration Framework, IRIS, JBoss
- Understanding of channel interface configurations: BROWSER, IB, DFE, Data Warehouse
- Experience with Core Java
- Oracle Database administration or tuning knowledge