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Role description

AgileEngine is an Inc. 5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards.

WHY JOIN US
If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you!

About The Role
We are looking for a
Senior Mobile Engineer
to maintain and optimize native iOS and Android voice and messaging applications, with a strong focus on Swift (70%) and Kotlin (30%), while leading Proof of Concept work to evaluate migration toward React Native. You will implement and optimize Real-Time Communication capabilities including WebRTC, SIP, and VoIP push notifications, solve complex voice, network latency, and socket reliability challenges, and collaborate directly with client stakeholders on mobile architecture and feature decisions.

What You Will Do

Maintain, enhance, and optimize existing native Android (Kotlin) and iOS (Swift) mobile applications.
Design and build Proofs of Concept (PoCs) to evaluate and execute the transition of native apps to React Native.
Implement and optimize Real-Time Communication (RTC) capabilities, including WebRTC, SIP, and in-app chat features.
Solve complex mobile voice issues related to VoIP/voice-enabled push notifications, socket connections, and network latency.
Collaborate directly with key stakeholders to refine mobile architecture and feature specifications.
Conduct code reviews, establish best practices for mobile stability, and drive continuous performance improvements.
Operate in an Agile delivery workflow with regular sprint planning and technical iterations.

MUST HAVES

3+ years of hands-on professional mobile development experience across both iOS and Android platforms.
Strong, direct experience writing native mobile applications in Swift (iOS) and Kotlin (Android). (Role will be 70% oriented in Swift and 30% oriented in Kotlin.)
Exposure or knowledge of React Native.
Solid domain experience with Real-Time Communication (RTC), specifically WebRTC, SIP, or VoIP architecture.
Proven experience implementing voice-enabled push notifications (e.g., PushKit, CXProvider, VoIP background modes) and handling network latency in voice/chat apps.
Strong technical problem-solving ability with a senior-level mindset for app stability and connection reliability.
Based in LATAM or Ukraine with at least 4 hours of EST time zone overlap.
Excellent written and spoken English communication skills for client-facing collaboration.

NICE TO HAVES

Direct experience migrating native mobile applications (Swift/Kotlin) to React Native.
Deep understanding of socket connections, audio packet management, and mobile bandwidth optimization.
Background in developing specialized VoIP or real-time communication consumer applications.
Experience working in high-growth startup or dedicated remote agency environments.

Perks And Benefits

Growth without limits: build your skills through mentorship, internal TechTalks, challenging projects, and a dedicated annual learning budget
Competitive compensation: get recognition that reflects your skills and impact, with regular performance and compensation reviews
Flexibility: work 100% remotely with flexible hours that support focus, autonomy, and a healthy work rhythm
Meaningful, modern projects: build impactful products using modern technologies alongside global teams and leading brands
Collaborative culture: join a supportive environment with zero micromanagement where ideas are welcomed and contributions are recognized
Well-being & support: access local well-being programs and people-focused support tailored to your location

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Mobile Developer

Senior iOS Developer

Immoweb

Remotefulltime

Apply on the employer's site

Role description

Build the platform where Belgium feels at home.
For over 30 years, Immoweb has been more than just a platform; we are the digital heartbeat of the Belgian real estate market. From first apartments to forever homes, we bridge the gap between dreams and reality for millions of users every month.

Our mission: to inspire, guide and close every home move in Belgium. We make real estate fast, transparent, and stress-free through world-class technology and human-centric support. We are dedicated to connecting people with their property goals, ensuring that at Immoweb, your work has an immediate, nationwide impact from day one.

Your Mission
Who we are
Immoweb is Belgium's leading real estate portal, part of AVIV Group, Europe's largest network of digital real estate marketplaces. Every month, hundreds of thousands of people use our iOS app to search, save, and get alerted about the properties that matter to them. We're currently modernising our native codebase — moving from an older UIKit/MVVM stack to a leaner, more testable Swift 6 architecture — while keeping the app running reliably for our existing user base.

The Seeker squad
You'll join Seeker, a full-stack squad (iOS, Android, Web, Backend, Design) that owns the end-to-end property search and discovery experience: search, filters, saved searches and alerts, and the property detail page. We work in close collaboration with product and design, ship through CI/CD, and care about shipping quality features that scale to hundreds of thousands of daily users.

What You'll Do

Design and build native iOS features for the Immoweb app, working closely with our Android, Web, Backend, and Design counterparts on shared feature sets.
Contribute to our ongoing migration from UIKit/legacy patterns to SwiftUI, @Observable, and Point-Free's modular architecture libraries.
Write clean, testable code (XCTest / Swift Testing) and review your teammates' work.
Continuously improve app quality, performance, and stability for a large, active user base.
Ship through our CI/CD pipeline in close collaboration with product managers.
Be a driving force behind new features — search relevance, alerts, personalisation — and technical improvements alike.
Share knowledge with the team and help raise the bar on iOS engineering practices across Immoweb.

What You Bring

Solid, hands-on experience building production iOS apps in Swift, ideally including Swift 6 and iOS 18.
Strong SwiftUI experience; comfort with @Observable and modern state management patterns.
Good understanding of Swift Concurrency (async/await); exposure to RxSwift is a plus, as parts of our codebase are mid-migration.
Familiarity with, or willingness to adopt, Point-Free's à la carte libraries (swift-dependencies, swift-sharing, swift-navigation, swift-case-paths).
Experience consuming RESTful APIs; familiarity with Moya is a plus.
A solid grasp of software architecture and Clean Architecture principles.
Basic knowledge of unit and UI testing (XCTest / Swift Testing).
Comfort working with Git and collaborative workflows (GitHub).
Excellent communication skills; you're a team player who shares knowledge openly.
English is mandatory; French or Dutch are strong assets given our Belgian market.

Nice to have

Experience with Swift Package Manager.
Familiarity with the Composable Architecture (TCA) or similar unidirectional architectures.
Experience with A/B testing and product analytics/tracking.
Experience with Bitrise or similar CI/CD tooling.
Knowledge of accessibility best practices.
Experience contributing to or consuming a design system.
Familiarity with Jira and Confluence; experience working in Scrum.

What We Offer

A friendly, quality-first engineering culture where you'll help modernise a widely-used app.
Real ownership over features used by hundreds of thousands of people every day.
Hybrid working, with the option to be based in Brussels or Bucharest.
Opportunities for growth — training, conferences, and mentorship within a full-stack squad.
The autonomy to work in the way that makes you most productive, and a say in the tools you use.

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.