Senior iOS Developer

Finom; Germany (OH); On-site; USD 130,000 - 180,000; Full time

Benefits offered by this job

Health insurance

Job summary

Finom is seeking a Senior iOS Engineer to design and build features for our iOS app used by European business owners. You will own end-to-end delivery, shape architecture, and mentor peers in a cross-functional team including Backend, ML/AI, QA, Design, and Product.

We value Swift/SwiftUI/UIKit mastery, VIPER and Coordinator patterns, and strong testing and CI/CD discipline. Finom emphasizes product impact and high-quality engineering in a fintech context.

Qualifications

• Proven track record shipping iOS apps with Swift and SwiftUI.
• Hands-on experience with VIPER and Coordinator patterns.
• Strong understanding of UIKit and modern iOS architectures.
• Experience in fintech or highly secure domains preferred.
• Excellent written and verbal English communication.

Responsibilities

• Design and build features for a multi-account iOS app used by European business owners.
• Shape architecture, raise engineering quality, and mentor peers.
• Own end-to-end delivery including testing, reviews, and CI/CD.
• Collaborate with Backend, QA, Design, and Product to ship impactful products.
• Ensure performance, security, and robust UX across devices.

Skills

Swift

UIKit

SwiftUI

VIPER

Coordinator pattern

Git/GitLab

CI/CD

Unit testing

UI testing

Performance profiling

English communication

AI tooling exposure

Security best practices

Tools

Xcode

Instruments

GitLab CI/CD

Job description

• We're looking for a Senior iOS Engineer who thinks like a product builder — someone who cares deeply about the \"why\" behind what they're building, not just the tickets in the backlog
• You'll be embedded in a cross-functional domain team (Backend, Mobile, ML/AI, QA, Design, and Product) and own the end-to-end development of features that genuinely matter: company accounts and cash flows, banking transactions, card issuance and management, and AI-enabled accounting. You'll help shape architecture decisions, raise the bar on engineering quality, and mentor the engineers around you
• If you're energized by working at the intersection of great mobile engineering and real product impact — this is the role
• Design and build new features for our iOS application, used daily by business owners across Europe
• Architect and implement reliable, intuitive solutions for:
• Multi-account cash flow management
• Banking transactions and payments
• Physical and virtual card issuance, activation, and control
• AI-powered accounting automation
• Build polished, responsive UIs using UIKit and SwiftUI
• Take ownership of code quality, performance, and stability — automated testing and thorough code reviews are non-negotiable
• Collaborate closely with Backend, QA, Design, and Product — you'll be shaping solutions end-to-end, not just implementing specs
• Drive technical decisions within your domain, challenge assumptions when needed, and proactively identify opportunities to build better
• Contribute to CI/CD pipelines, tooling, and mobile best practices across the team

You're pragmatic and have a proven track record of shipping products that matter. You communicate clearly across disciplines and thrive in a cross-functional environment where everyone is solving the same customer problem togetherExperience with layout development in code, particularly using SnapKit or similar toolsConfidence with Git / GitLab, including the ability to set up and use GitLab CI/CDStrong knowledge of the Swift language and at least 3 years of commercial iOS developmentPractical experience using the VIPER architectural pattern and the Coordinator navigation patternA builder's mentality — you care about the product, the users, and the outcomes, not just the codeDeep understanding of OOP, SOLID principles, and design patternsExcellent knowledge of UIKit and experience (or a strong desire to develop skills) with SwiftUIAbility to write unit and UI testsBackground in fintech or experience with financial products — you understand the stakesClear, concise communication in English across technical and non-technical audiencesSolid grasp of mobile security best practices (especially critical in our domain)Experience profiling and optimizing UI performance — reducing rendering bottlenecks and achieving smooth 60/120fps on iOSHands-on work with performance tooling: Instruments, XCTest, or similarPublished apps on the App Store you're proud ofAn active GitHub profile with code you're happy to shareHands-on experience with AI agents and LLM tools (Claude, Cursor, Copilot, etc.) — setting up agent environments, writing prompts, skills, and behavioral rulesUnderstanding of model capabilities and limitations — knowing which model fits which task and how to manage the context window effectiveExperience with AI-powered IDE tools (Cursor, Windsurf, GitHub Copilot, Claude Code, etc.) — including agent mode, rules files configuration, and integrating AI into the daily development workflowAbility to evaluate and verify AI-generated output — using automated tests, linters, and critical review to catch hallucinations and errorsAwareness of AI security risks — prompt injection, data leakage, and safe handling of untrusted inputs in agentic workflows