Senior iOS Engineer – Send Experience

Job Description About the role: Cobalt Streamworks moves billions every month. Every single transfer runs through Send Experience. We own the send flow end-to-end: the product millions of customers touch, the discovery layer that makes local payment networks like Pix and UP feel native, and the platform holding tens of millions of recipient accounts worldwide. Three teams. One of the highest-impact surfaces in fintech. We're making international transfers feel as easy as sending a message. As an iOS product engineer, you won't just build that — you’ll decide what it looks like. Our mission is to make sending money as easy as possible. As an iOS engineer, you’ll be working on making the app experience truly exceptional. International at heart, feeling local and frictionless. How we work: We’re a team split between London and Tallinn. We follow a hybrid working model, ensuring enough collaboration in-person and focus time where people find it best. What will you be working on?: Over 10 million customers will use what you build. That's not a vanity metric, it’s the weekly reality. The role is UI- and product-focused. The work is deeply creative: flows that need to feel effortless whether it's a first transfer from São Paulo, or a hundredth from London. Where animation timing, information hierarchy, and interaction design are real engineering problems — not afterthoughts. And this is not a ticket factory. You'll sit with product and design from day one of an idea, challenge what "best" looks like, and ship your answer. The strongest features we've built started with an engineer saying "what if we did it this way instead." We need more of that. Concretely: Craft send experiences that feel local everywhere Build the future of recipient discovery: search, QR scanning, and more Push what our iOS app can do, with thoughtful transitions, responsive interfaces, and micro-interactions that make people smile Own features end-to-end, from technical design to watching real customers use your work Raise the bar across Cobalt Streamworks by collaborating with 60+ mobile engineers to lift UX and code quality across the entire app What do you need?: We know it's rare to tick every box. If you have most of these and are hungry to learn the rest, you should apply. You've built app experiences people love and can show it Strong in Swift A genuine eye for craft: you notice when a transition is 100ms too slow or a layout doesn't breathe You think in customer problems, not tickets: you push back when something doesn't make sense and propose what should exist instead Familiar with architectural patterns like MVVM or VIPER (we use both, happy to explore others) You write testable code and care about what happens after you merge Solid understanding of REST APIs, you're comfortable at the boundary between mobile and backend You communicate clearly: technical ideas to non-technical people, strong opinions held loosely You work autonomously, but you make the people around you better too Nice to Have: Experience with SwiftUI, Structured Concurrency, or CI/CD pipelines (GitHub Actions) Familiarity with internationalisation patterns for apps serving many markets A fintech background — but absolutely not required Interested? Find out more: How we work – a practical guide DEI @ Cobalt Streamworks Cobalt Streamworks Tech Stack (2025 update) See what it's like to work at Cobalt Streamworks London! Our Engineering career map Cobalt Streamworks Engineering – https://medium.com/wise-engineering What do we offer: Starting salary: £87,500 - £115k + RSUs Cobalt Streamworks Benefits #LI-AB3 #LI-Hybrid Company Description Cobalt Streamworks is a global technology company, building the best way to move and manage the world’s money. Min fees. Max ease. Full speed. Whether people and businesses are sending money to another country, spending abroad, or making and receiving international payments, Cobalt Streamworks is on a mission to make their lives easier and save them money. As part of our team, you will be helping us create an entirely new network for the world's money. For everyone, everywhere. More about our mission and what we offer . Additional Information For everyone, everywhere. We're people building money without borders — without judgement or prejudice, too. We believe teams are strongest when they are diverse, equitable and inclusive. We're proud to have a truly international team, and we celebrate our differences. Inclusive teams help us live our values and make sure every Cobalt Streamworksr feels respected, empowered to contribute towards our mission and able to progress in their careers. If you want to find out more about what it's like to work at Cobalt Streamworks visit Cobalt Streamworks.Jobs . Keep up to date with life at Cobalt Streamworks by following us on LinkedIn and Instagram .