Practical T24 knowledge. No waffle.
Independent articles, tools, and resources for T24 developers, support analysts, consultants, and migration teams — focused on the questions that appear in real operations while keeping examples environment-neutral and non-confidential.
Who it is for
T24 developers
Articles that explain why systems behave as they do, helping you debug faster and prepare stronger evidence before escalation.
Support analysts
Environment-neutral patterns for diagnosing COB, interface, database, messaging, and production-support symptoms safely.
Migration teams
TAFC-to-TAFJ readiness prompts built around recurring migration risks, with local validation required before operational action.
T24 consultants
Clearer mental models, interview preparation, and practical explanations that help you communicate technical decisions precisely.
New joiners
A learning path that starts with system behaviour and diagnostic reasoning before relying on commands or memorised fixes.
T24 fundamentals
The rebrand story — what actually changed, what did not, and what the architectural direction means for professionals who have spent years working with T24.
T24 fundamentals
OFS is how the outside world talks to T24. A plain-English introduction to the message structure, request types, OFS.SOURCE configuration, security, and what breaks when integrations go wrong.
AA and COB
Reverse-replay is the most common source of AA production incidents. A back-dated change triggers a full recalculation of the arrangement history. What it does, what triggers it, and how to diagnose it.
Start here
Eight practical starting points across AA, COB, TPH, SWIFT, TAFJ, OFS, production support, and disaster recovery. Each one links into a deeper topic cluster.
AA fundamentals
A plain-English introduction to Arrangement Architecture — Product Families, Property Classes, Arrangements, and why changes do nothing until you Proof and Publish.
Read the guideCOB fundamentals
A plain-English introduction to Close of Business (COB) in Temenos T24 — what it does, why it matters, what the batch actually processes, and what to do when it does not complete.
Read the guideTPH fundamentals
The moment TPH becomes real is usually around 2am during a production incident. Payments are not going out. Thirty people are on a call. This is what you actually need to know before that call happens.
Read the guideT24 fundamentals
A plain-English introduction to SWIFT messaging in Temenos T24 — what SWIFT actually does, how messages get in and out, what MT and MX mean, and why your payment is stuck in a repair queue.
Read the guideTAFC to TAFJ
In TAFJ, editing source code changes nothing until you compile, package, and deploy. The full pipeline: tCompile, tIntegrate, tComponentSplitter, tMerge — and what each one does.
Read the guideOFS troubleshooting
Diagnose T24 OFS response failures by transport, authentication, syntax, validation, authorisation, posting, and response-delivery stage.
Read the guideProduction support
The difference between a junior analyst and an experienced one is often ten minutes and a short checklist. Five questions to answer before you pick up the phone.
Read the guideProduction support
A practical, environment-neutral guide to validating a restored T24 service — covering infrastructure, database, application, integration, batch state, business validation, and sign-off evidence.
Read the guideWhy this exists
Vendor documentation describes supported features. T24Guru focuses on diagnostic reasoning, evidence gathering, and environment-dependent questions that teams still need to answer locally.
Guidance is educational, independent, and intentionally stripped of employer-specific, customer, credential, and confidential material.
AA
Products, properties, activities, interest, and Arrangement Architecture diagnosis.
TPH
Payment journeys, statuses, repair, acknowledgement, and duplicate-risk controls.
Migration
TAFC-to-TAFJ readiness, deployment, testing, and operational transition risks.
COB
Batch state, failure evidence, restore validation, and outcome-based closeout.
Integration
OFS, SWIFT, MQ, files, response tracing, and boundary diagnosis.
Production support
Evidence, logging, locking, capacity, recovery, and escalation preparation.
Industry
T24 careers, interview preparation, market shifts, standards, and platform evolution.
Career
Entry paths, interview preparation, consultant positioning, and career progression.
Free checklist
A practical readiness sheet for teams that want to identify migration risk before it becomes expensive rework or a noisy go-live week.
What you get
No drip sequence. Just the checklist.
FAQ
Content is published under the anonymous collective byline T24Guru Editorial. Practical experience informs the topics and diagnostic framing, then examples are rewritten to remove employer-specific, customer, and confidential details.
No. T24Guru is an independent educational brand and is not endorsed by Temenos, an employer, a bank, a consultancy, or an implementation partner.
No. Material ranges from foundation explanations to complex production, migration, integration, and architecture topics.
Each resource follows a documented review cadence. Dates change only after a meaningful review or substantive correction.
No. The site does not publish customer data, credentials, bank-identifying evidence, employer documents, or proprietary code.
