The difference between a backend that hums and one that crumbles under pressure isn’t a lucky break: it’s engineering. The best solutions don’t come from you working in isolation, staring at logs, or fretting over your codebase. They come from people wrestling with real-world scaling problems, learning through failure, and designing for a future that isn’t yet written.

At Replay ‘25, those engineers will take the stage to tell you how they’re pushing workflow orchestration, Durable Execution, and modernization efforts forward. Whether you’re replacing brittle cron jobs, chasing millisecond-latency SLAs, or rethinking resilience from the ground up, this is where your next breakthrough might come from.

Here are just a few of the great talks you can look forward to, grouped by industry.

Finance and Payments: Building Systems That Can’t Afford to Fail#

These experts will put their money where their mouth is. If you’re in FinServ and looking to cut down complexity or replace cumbersome Celery tasks, we’ve got something for you.

How Vinted uses Temporal to manage complex payment flows#

Vinted is Europe’s largest online C2C platform for second-hand fashion, processing millions of payments every day across multiple currencies and banking systems. In this talk, Gytis Ramanauskas, Engineering Manager at Vinted, shares how integrating Temporal into their Ruby-based payments monolith reduced complexity, improved resilience, and changed the way their engineers design fault-tolerant workflows.

Airwallex: Tucking In Your Legacy Tech Debt With Temporal#

Airwallex, a global finance platform used in over 150 countries, had a legacy microservice architecture that served them well… until it didn’t. Mits Kikotani will share how Airwallex fixed their third-party adapter microservices without a risky full rebuild.

Check: Durable Payroll in a Modular Monolith#

Check manages payroll for thousands of businesses, processing billions in wages and tax filings. In their talk, Sam Wilson, Principal Engineer at Check, will break down how they replaced fragile cron jobs and Celery tasks with Temporal-powered orchestration, improving speed, reliability, and debugging.

Transforming Customer Onboarding at Mollie: Our Automation Journey with Temporal#

Legacy PHP. A monolith struggling under scale. Join Sonnya Dellarosa, Software Engineer at Mollie, to learn how her team rebuilt their onboarding process with Temporal Workflows, improving developer velocity and compliance automation.

Cloud Migrations and Large-Scale Transformations#

When your system needs to move, it’s rarely a simple lift-and-shift. These teams are tackling everything from monolith evacuations to fleet-wide software rollouts.

Salesforce: Migrating a Monolithic Cloud with Temporal#

Salesforce was in the middle of migrating Marketing Cloud—a massive multi-tenant application—onto Hyperforce. With over 1,000 engineers involved, this migration was enormous. Trevor Grieger and Austin Deal, Principal Software Engineers at Salesforce, will explain how Temporal powered their cross-substrate migration system, orchestrating workers across multiple environments and coordinating teams seamlessly.

Vodafone’s Use of Temporal in Our Customer Premise Equipment Management Platform#

Pushing software updates across millions of routers and home devices isn’t simple. In his talk, Vodafone’s Principal Software Manager, James Irwin, will walk through how they built a highly resilient CPE management system to handle software deployment, security patches, and fleet-wide updates.

Infrastructure and Global Systems Engineering#

Big systems demand big thinking. Whether you’re orchestrating global network automation or running self-hosted clusters at scale, these talks will keep you ahead of the curve.

Enabling Global Interconnections with Temporal Workflows in AI-Ready Data Centers at Equinix, the World’s Digital Infrastructure Company#

Equinix is the backbone of the internet. In this talk, Vaibhav Tupe, Senior Staff Software Engineer at Equinix, will go in-depth to explain how their team uses Temporal-powered automation to scale and manage Software-Defined Networking (SDN) across global data centers.

Datadog: Inside the Engine Room: Surviving the challenges of self-hosting Temporal#

Self-hosting Temporal at Datadog started with a handful of clusters and grew to dozens. Over time, the increase in scale caused tremendous growing pains. In this session, Marcos Cela and Hardy Ferentschik, Senior Engineers at Datadog, will unpack the operational challenges they faced, from scaling surprises to outages and misconfigurations.

Resilience, Reliability, and Real-Time Response#

When failure isn’t an option, resiliency becomes your architecture. These speakers will walk you through the workflows that keep their systems operational when the stakes are highest.

Controlling the Unknown: How KOHO Turned a Vendor’s Sev1 Outage Into a Non-Event#

Ali Waseem, KOHO’s Engineering Manager, will give a talk all about maintaining trust with your users. This talk centers around critical vendor integrations, real world factors, and the high-stakes decision that ultimately make the team choose Temporal.

Verkada: Engineering a Durable Alarm System for Real-World Security#

Verkada’s cloud-based alarm response system secures businesses, schools, and government buildings. The system detects threats, verifies visitors, and responds to intruders. Sai Teja Reddy Moolamalla, Engineering Lead at Verkada, will show how they built a fault-tolerant workflow engine for rapid, reliable security responses.

Engineering teams need to exceed what’s considered “good” infrastructure: they need frictionless tools that let them move fast and build with confidence. These talks show how internal platforms are using Temporal to boost developer productivity.

The Saga of Orchestrating a Seamless Developer Experience at Maersk#

With 4,500 engineers relying on Maersk’s internal platform, inefficiency is costly. Learn how Andrey Dubnik and Fatima Mookhtair, Platform Architects at Maersk, use Temporal alongside their entire team to power automation workflows, from infrastructure provisioning to deployment orchestration.

Nutanix: The Swiss Army Knife of Platform Engineering#

Platform teams face an endless backlog of operational problems. Nutanix’s Engineering Manager, Bharadwaj R Embar, shares how the team uses Temporal to automate workload orchestration, security approvals, and compliance enforcement—and how they improved developer productivity and experience across the board.

Why Replay ‘25 Matters#

You can read case studies, watch talks online, and even swap war stories on Slack, but nothing replaces being in the room with the minds who’ve already solved the problems you’re facing. Replay is where challenges get torn apart, examined, and put back together by the people building the most ambitious systems in the world.

What you’ll take away:

Firsthand lessons from teams modernizing legacy systems and scaling distributed architectures. Concrete technical deep dives—no fluff, no hand-waving. A chance to connect with engineers who’ve already tackled your toughest problems.

We’re in the final days counting down to Replay. Grab your tickets and join us in London, March 3–5!