Mobile Developer

About us

Solflare is one of the fastest-growing crypto wallets in the world. With around 4 million monthly active users and over $20 billion in digital assets secured through our platform, we’re building a powerful gateway to Web3. Founded in 2021, Solflare now has a team of nearly 160 people, with offices in Zagreb, Belgrade, and Novi Sad, plus remote teams across the globe. Our vision is simple but bold: a world where everyone has full control over their assets – achieving true financial independence.

Our culture

At Solflare, we’re on a mission to empower people to truly own and thrive – starting with our own team. We take on bold challenges with curiosity, grit, and a deep sense of accountability. Here, progress means learning fast, solving smart, and showing up for each other without ego. You’ll join a team where we question the status quo, celebrate shared wins, and never settle for “just good enough.” If you’re excited by growth – yours, ours, and society’s – you’ll feel right at home.

The role

As a Senior Mobile Engineer, you will help lead the development of the mobile apps, support and mentor your teammates, and help drive technical decisions that impact performance, security, and user experience. Your expertise will be key to ensuring the app’s smooth operation, as well as its scalability across different devices and platforms.  We don't hand seniors a queue and assign tickets — we expect you to lead yourself, your tasks, your initiatives, and your projects, and to take them to the finish.

You'll work across verticals — Trading, Onramp/Offramp, Onboarding, Explore, Core, Seeker — and across boundaries with Backend, Web, QA, Product, Design, Data. You'll mentor teammates and drive technical decisions that change how performant, secure, and lovable the app feels.

Core responsibilities:

• Drive continuous improvement. Look for what can be better — in the code, the process, the product, your own workflow — and act on it without waiting for permission. An engineer who works the same way after a year as they did on day one isn't doing this job.
• Reason from first principles. Question inherited assumptions before reaching for the convenient answer. Argue ideas hard, then commit fully when another path wins on its merits.
• Own the outcome, not just the code. Watch crash reports. Read store reviews. Notice when the app feels slow on a mid-tier Android. The job ends at the user, not the merge button.
• Make pragmatic trade-offs. Decide when to over-engineer and when to ship the ugly thing. Hold opinions about tech debt without moralizing about them. Make the call, document the trade-off, move on.
• Treat the codebase as a product. Write code that other engineers — and QA automation — can read, test, and change safely. Structure, naming, and testability are part of the deliverable, not afterthoughts.
• Use AI as a force multiplier, not a crutch. Lean on AI tools for the work that doesn't need a human brain — scaffolding, refactors, test stubs, exploration. Reach for agent-style workflows when the task warrants it. Review AI output with the same rigor as a junior engineer's PR. (We already do this in production — our release reports are AI-generated and reviewed by humans.)
• Communicate in writing. Document the tricky bits in Notion. Explain decisions async. If it only lives in your head or in a Slack thread, it doesn't exist for the team.
• Stay current with the platform. Track WWDC, Google I/O, and the broader mobile ecosystem. Bring ideas back. Keep the app from aging out.

Requirements:

• 7+ years of mobile experience. You've shipped, broken things, and learned from both — and you can run your own work without needing it queued up for you.
• Deep mobile fundamentals. A strong grasp of how mobile platforms actually work — lifecycle, memory, threading, networking, storage, rendering. Frameworks come and go; these don't. You should be able to reason about a problem in Flutter, native iOS, or native Android because you understand the layer underneath all three.
• Native platform depth. Advanced expertise in either iOS or Android. This is what lets you debug the hard bugs and design integrations that don't fight the platform.
• Architectural judgment. Know how to structure a codebase so multiple engineers can move in parallel without stepping on each other. Understand the trade-offs between abstractions — when modularity pays off, and when it's just complexity in a costume.
• Performance and resilience engineering. Comfortable with profiling tools, identifying bottlenecks, and reasoning about app behavior across the long tail of devices and network conditions. Know what "good" looks like and how to measure it.
• Security awareness. Familiar with secure storage, encryption, SSL pinning, common mobile attack surfaces, and the trade-offs in handling sensitive data on-device. Self-custodial wallets have no margin for sloppy.
• AI-augmented engineering. Fluent with AI coding tools and where they help versus where they get in the way. Can build, prompt, and evaluate agent-style workflows when the task calls for it. Treats AI output as a draft, not a deliverable.
• Code review and mentorship. Give feedback that makes the codebase and the people around you better. Disagree productively. Pull others up without being precious about it.
• Written communication. Explain complex technical ideas in plain language. Write design docs and decision records that hold up six months later. If a discussion matters, it ends up in writing.

Nice to Have:

• Cryptography knowledge. Hands-on understanding of keypairs, signing, key derivation, and seed phrases — beyond calling a library. This is the layer where wallet bugs become existential.
• Hardware-backed security experience. Worked with iOS Secure Enclave, Android Keystore, or equivalent. Knows what these primitives actually guarantee and what they don't.
• Backend systems literacy. Comfortable reasoning about the services your app talks to — APIs, data flows, failure modes, where state lives. You don't need to ship backend code, but you should be able to debug across the boundary instead of stopping at the network call.
• Product builder track record. Has taken a product from idea to shipped, not just contributed features to someone else's roadmap. Understands what it takes to make something real users rely on — the unglamorous parts included.
• Shipped in a high-stakes domain. Payments, banking, healthcare, identity — anywhere a bad release isn't just an inconvenience. Self-custodial crypto qualifies, and the experience shapes how you think about testing, deployment, and risk.
• Crypto context. A solid understanding of EVM/SVM-based cryptocurrencies isn't expected, but very welcome. Most of it can be taught; a head start helps.

Personality Traits We Value

• Problem-solvers: You see roadblocks as opportunities and don’t wait around for someone else to fix things.
• Self-starters: You take initiative, follow through, and deliver with pride – no excuses, no shortcuts.
• Team players: You thrive in a “we, not me” culture, lifting others up while sharing the load.
• Adaptable minds: You embrace change, question how things are done, and constantly look for better ways.
• Ownership mindset: You own your work end-to-end, communicate openly, and learn from every challenge.

Why Solflare?

• Make an impact: Your work will directly shape how people interact with and understand crypto wallets, empowering users around the globe.
• Work with the best: Collaborate with a talented, driven team across design, engineering, and product to build innovative, user-first experiences.
• Flexibility: Remote or office – up to you. Enjoy a flexible work environment based on trust that supports your well-being and fosters creativity, as well as flexible work time – work when you are most productive, with no micromanagement.
• Perks & benefits: individual education budget, cool team buildings, private health insurance, to name a few.
• Learn about Crypto: No crypto experience? No problem! You’ll be part of a team that will teach you the ropes and help you grow into an expert.

Join us at Solflare and be part of something bigger than yourself. We’re not just reacting to trends; we’re building the future. If you’re ready to push boundaries, challenge assumptions, and make an impact, we want to hear from you.

Apply now and help us shape the future of decentralized finance.