Key responsibilities

• Define the event contracts that our backend and frontend teams must produce to, and every downstream consumer will depend on. Build the ingestion edge that enforces them and adapts existing events into line.
• Own the stream-processing and low-latency state layer that turns raw events into real-time signals.
• Design and ship the rules/decisioning layer that turns those signals into actions — fast, explainable and safe.
• Define delivery guarantees, versioning, replay strategy, and privacy-by-design for the event platform, given Brazil's regulatory environment.
• Learn the business deeply enough to be able to scope the first production use case, then take it end to end — from idea, through architecture, to a live system — documenting the pattern other engineers will follow after.
• Translate business requirements from the project lead into technical design, present architecture trade-offs to non-technical stakeholders, and manage competing priorities as they come up.
• Set the initial technical standards (code, review, on-call, incident process) this effort runs on.
• Build measurement from day one: every decision logged with the facts it used, a permanent hold-back group, and the ability to replay any rule against history. The platform must be able to prove its own value, not just act.

Main Requirements

• Fluent English, with strong written and verbal communication — you'll work directly with senior leadership.
• Real-time systems architecture knowledge — non-negotiable.
• Production experience building and operating event-driven systems (Kafka or similar), including debugging and fixing real incidents.
• Experience owning schema and data contracts as long-lived interfaces other teams depend on.
• Hands-on experience with stream processing and low-latency state: out-of-order events, exactly-once delivery, cancellable timers.
• Experience building or integrating rules, decisioning, or real-time personalisation systems.
• Track record of making architecture decisions under uncertainty.
• Curiosity and a self-starter mindset.

Nice to have

• Experience in iGaming, payments, fintech, or another regulated, high-volume consumer domain.
• Experience being engineer #1 on a platform effort — knowing what to build now versus later.
• Familiarity with frontend event instrumentation and client-side telemetry.

At KTO, diversity isn't just a buzzword – it's our strength.

At KTO, diversity isn't just a buzzword – it's our strength. We're all about creating an inclusive environment where everyone feels valued and empowered. Together, we're not just working on projects – we're making a real impact in our communities. Join us in celebrating diversity and driving meaningful change!