Jobs Mobile

We’re looking for a Front-End Engineer to join our team. 

Work Location: Poland (Krakow), Slovakia (Kosice) or Czechia (Prague). 

Hybrid: 2+ days per week in the office, the rest remote.

The Mission

We are building a complex, real-time ecosystem for micromobility and logistics systems sim—where split-second logistics meet seamless user experiences. We need a Front-End powerhouse to lead the development of our Customer Mobile Web App and our high-utility Internal Admin Panels.

You’ll be the bridge between the sleek, high-performance interface our users see and the robust, scalable Python services that power the logic.

• Mobile-First Frontend: Architect and scale our React-based mobile web application, ensuring 60fps performance and offline-first capabilities.
• Operational Control Centers: Build dense, data-heavy Admin Panels that allow our operations team to monitor real-time logistics, manage users, and handle complex dispatching.
• Scalable Backend: Design and maintain performant APIs using Python (FastAPI/Django) to handle high-concurrency event streams.
• End-to-End Ownership: From database schema design to CSS transitions, you’ll own the entire feature lifecycle.

Who You Are

• The Architect: You don't just "write code"; you design systems. You understand how a change in a Python microservice ripples out to the React frontend.
• UX Enthusiast: You understand that an Admin Panel requires different UX "muscle" (efficiency and density) than a mobile app (simplicity and speed).
• Problem Solver: You’ve dealt with the "hard stuff"—real-time GPS tracking, race conditions in booking logic, or complex state management.
• Pragmatist: You balance the need for clean, tested code with the reality of shipping features in a fast-paced environment.

Will be a plus Led transformation of standalone product into scalable SaaS platform.

Why Join Us?

Work on a product with immediate, real-world impact.

A "no-red-tape" environment where your architectural decisions stick.

Layer Technology

Frontend - React Native Expo, Styled Components, Mobx/Redux, WebSockets. Experience with Firebase, Expo SDK, Expo Modules.

Backend - Python (FastAPI / Django / Flask)

Database - PostgreSQL, Redis (for real-time caching)

Infrastructure - AWS/GCP, Docker, Kubernetes

Real-time - WebSockets / Socket.io (for "Uber-style" live tracking)

Requirements & Skills - Senior Front-End Engineer

What We’re Looking For:

• 3+ years of commercial experience with React Native (Expo)
• Advanced proficiency in React Native Expo.
• Expert-level TypeScript experience with advanced types and strict configurations;
• Deep knowledge of React 18+ fundamentals: hooks, context, memoization, rendering performance.
• Strong knowledge of state management tools (Redux, MobX, Zustand, etc.);
• Experience building map-based UI: react-native-maps / MapView, markers, polylines/routes, camera control, clustering.
• Strong UI implementation skills: different screen sizes, accessibility basics.
• Hands-on experience with GPS / background location tracking
• Expertise in navigation: React Navigation (deep linking, nested navigators, modal flows).
• API integration: REST/GraphQL consumption, request caching, pagination, retries, error handling.
• Handling auth flows (JWT/OAuth), token refresh, secure storage patterns (Keychain/Keystore concepts).
   

Core responsibilities: 

• Full end-to-end ownership of the mobile app (iOS & Android)
• App maintenance, releases, production stability & incident handling
• GPS / geolocation + live tracking
• REST API + real-time event integration
• Performance, reliability, and architecture improvements
• Ability to understand business requirements and translate them into technical requirements.

Required Skills

• React Native Expo, Styled Components, Mobx/Redux, WebSockets. 
• Experience with Firebase.
• Expo SDK 52+, Expo Modules

Language Skills

English: Upper intermediate (B2)

We offer:

• Challenging and rewarding tasks with autonomy in a distributed international team
• Motivated colleagues who foster a collaborative environment
• Competitive salary based on your experience and expertise
• 20 vacation days + state holidays + your birthday off (for full-time employees)
• Sick leave coverage (5 days for full-time employees)
• Opportunities for regular business trips abroad

Solid Software continues to grow and we`re opening our doors to talents from Latin America! 
 

If you are a Middle Flutter Engineer, looking for new challenges, complex projects, and a great team, we have a place for you to grow and thrive!

We're excited to welcome a skilled engineer who wants to dive deep into complex architecture, push the boundaries of the stack, and grow as a technical leader in our team.
 

Apply now and enjoy bringing innovation to life!

What will you do?

• Contribute to the full development cycle of Flutter & Dart apps;
• Work across a variety of projects, from scratch to ongoing support and feature development;
• Write clean, maintainable code following best practices and coding standards;
• Solve complex technical challenges and implement effective solutions;

• Continuously grow your skills and deepen your Flutter & Dart expertise alongside engineers who've been doing this since 2018.
 

Requirements:

• Knowledge of Flutter & Dart Core;

• 2+ years of commercial experience with Flutter & Dart;

• Solid background in mobile application development (Android, iOS);

• Fluent English for confident and comfortable daily communication with an international team;

• Good understanding of OOP/ SOLID/ DRY principles, CS fundamentals and Flutter & Dart core;

• Strong focus on code quality;

• A habit of asking the right questions and getting to the bottom of things;

• The ability to think independently and drive things forward without waiting to be nudged.

Would be a plus:
 

• Experience using AI;

• Understanding of server-side development in Java and web client interfaces in JavaScript;

• Understanding of security and compliance principles.

Why Solid Software?
 

• A wonderful team of enthusiasts and like-minded people;

• One of the biggest Flutter expertise in the world;

• Atmosphere of comfortable work & life balance;

• Flexible schedule and work-from-home opportunity;

• Opportunity to work on projects with different Flutter directions (web, mobile, tablet, watch, desktop);

• MacBook Pro and great tech;

• Decent compensation;

• Lack of bureaucracy;

• Compensation for professional events, English lessons, sports activities;

• Corporate online parties and fun team-buildings;

• Anniversary and birthday presents;

• Accounting services.

Professional growth:

• Onboarding and mentorship program with a dedicated onboarding Flutter guide built by our team;

• Internal Career Path program from Developer to Architect that consists of knowledge areas for IT specialists, books, training sessions, and work activities;

• Corporate library with the best programming books (+ an ability to order a particular book if we don't have it);

• Professional and constant feedback.

We truly value the unique talents and skills that each individual brings to our company. 

As we continue on our journey of growth, we eagerly anticipate the opportunity to welcome you into our team. 

Talk to you soon!

About Us

Our team consists of like-minded and motivated professionals passionate about photography, photo editing, and innovations. TouchRetouch is our most well-known app, trusted by millions of photographers worldwide.
We are passionate about innovation and excellence, and we are looking for a Strong Middle / Senior iOS Developer to join our team and help us maintain the highest standards of quality in our mobile apps.

Job Description

As a Strong Middle / Senior iOS Developer at ADVA Soft, you will take ownership of key parts of our iOS applications and actively contribute to architectural decisions, performance optimization, and feature development.
You will collaborate with designers, product managers, and developers to deliver pixel-perfect, high-performance apps that delight our users.
You’ll also have the opportunity to mentor less experienced teammates and help shape the technical direction of our projects.

Key Responsibilities

• Design and implement complex features with a focus on performance, scalability, and clean architecture.
• Participate in defining architecture and choosing the best patterns and frameworks for new and existing products.
• Collaborate with designers to translate UX/UI ideas into functional and visually appealing interfaces.
• Optimize performance and ensure high stability and reliability of existing applications.
• Conduct code reviews, mentor junior developers, and enforce best coding practices across the team.
• Participate in sprint planning and provide accurate time estimations for development tasks.
• Integrate and maintain analytics, attribution, and subscription frameworks such as RevenueCat, AppsFlyer, and Amplitude.

• Stay up-to-date with the latest iOS technologies, trends, and tools to continuously improve development processes.

   

Qualifications

• 3+ years of professional iOS development experience.
• Strong proficiency in Swift and Objective-C (including experience with mixed Swift/Obj-C projects).
• Solid understanding of UIKit.
• Deep knowledge of iOS frameworks, multithreading, memory management, and performance optimization.
• Proven experience implementing clean architectures (MVVM, VIPER, Clean Swift, etc.).
• Hands-on experience with RevenueCat, AppsFlyer, and Amplitude.
• Understanding of asynchronous programming.
• Strong understanding of UIViewController/UIView lifecycle, Auto Layout, Animations, and adaptive UI for iPhone/iPad.
• Familiarity with Gitflow and collaborative team workflows.
• Experience integrating in-app purchases, push notifications. 

• Intermediate+ English for effective communication and documentation.

   

   

Would Be a Plus

• Experience working with C++ classes to exchange data with the core part of the application (bridging between C++ and Swift/Objective-C layers).
• Experience with Combine or Swift Concurrency (async/await).
• Familiarity with Agile/Scrum methodologies.
• Understanding of UI/UX principles and ability to collaborate closely with designers.
• Bachelor’s degree in Computer Science, Information Technology, or related field.

• Previous experience mentoring or leading small teams.

   

What We Offer

• Flexible working hours and remote work options.
• Comfortable, fully equipped office in Lviv, Ukraine.
• Opportunity to work on high-impact, globally recognized products like TouchRetouch.
• Collaborative and inclusive team culture focused on innovation and quality.
• Paid medical leaves and 28 paid vacation days per year.
• Continuous professional growth through code reviews, internal knowledge sharing, and collaboration with experienced engineers.

About the Role

We are looking for a Senior Frontend Developer who will be responsible for building modern, scalable, and high-performance web applications. In this role, you will work closely with design, product, and backend engineering teams to deliver seamless user experiences while also contributing to cloud infrastructure, deployment, and DevOps practices.

The ideal candidate combines strong frontend engineering expertise with solid knowledge of AWS and modern DevOps tooling.

Key Responsibilities

Frontend Development

• Develop modern web applications using ReactJS and TypeScript.
• Design and implement reusable UI components and scalable frontend architecture.
• Build and maintain state management solutions and API integrations.
• Create responsive, accessible, and user-friendly interfaces across devices and browsers.
• Collaborate with designers and product teams to translate requirements into intuitive user experiences.
• Ensure high standards of performance, maintainability, and code quality in frontend applications.

Cloud & DevOps

• Deploy, configure, and manage applications on AWS (EC2, ECS/EKS, Lambda, S3, RDS, CloudWatch, IAM, and related services).
• Design and maintain CI/CD pipelines for automated testing and deployments.
• Work with Docker and Kubernetes for containerization and orchestration of services.
• Implement observability practices, including logging, monitoring, and distributed tracing.
• Support infrastructure provisioning and environment automation.

Required Skills

Frontend Engineering

• Strong experience with ReactJS and TypeScript.
• Solid understanding of frontend architecture and component-based design.
• Experience with state management solutions (e.g., Redux, Zustand, MobX, or similar).
• Experience integrating RESTful APIs and working with backend services.
• Strong focus on performance optimization and responsive design.
• Understanding of web accessibility (WCAG principles) and frontend best practices.

Cloud & DevOps

• Hands-on experience with AWS cloud services, including:
  • EC2
  • ECS / EKS
  • Lambda
  • S3
  • RDS
  • CloudWatch
  • IAM
• Experience implementing CI/CD pipelines and automated deployment workflows.
• Experience with Docker and Kubernetes in production environments.
• Understanding of system observability (logging, metrics, tracing).

Nice to Have

• Experience working in distributed or microservices-based architectures.
• Familiarity with backend systems and API design.
• Knowledge of Infrastructure as Code (Terraform or CloudFormation).
• Experience with performance monitoring and frontend profiling tools.
• Exposure to Agile/Scrum environments.
• Experience working in high-load or large-scale systems.

We are seeking a highly skilled Senior iOS Developer proficient in Swift to join our dynamic team. As a Senior iOS Developer, you will be responsible for designing and implementing advanced applications for our utility suite on iOS devices. Your expertise will play a crucial role in enhancing our product functionality, performance, and overall user experience.

This is a project-based engagement (up to 3 months) with flexible working hours

Responsibilities:

• Design and build advanced applications for the iOS platform using Swift from a scratch
• Collaborate with cross-functional teams to define, design, and ship new features.
• Unit-test code for robustness, including edge cases, usability, and reliability.
• Continuously discover, evaluate, and implement new technologies to maximize development efficiency.
• Ensure the performance, quality, and responsiveness of applications.
• Mentor junior developers and assist in their professional growth.

Requirements:

• Proven experience as an iOS Developer, with at least 5 years of experience in Swift  and launching iOS applications from scratch, including architecture design, implementation, testing, and App Store deployment.
• Solid understanding of the full mobile development life cycle.
• Experience with Core Data for local data storage and offline support.
• Experience with Vision framework for image analysis and processing.
• Experience with third-party libraries and APIs.
• Strong knowledge of iOS UI design principles, patterns, and best practices.
• Experience working with remote data via REST and JSON.
• Excellent problem-solving skills and analytical thinking.
• Ability to work independently and as part of a team in a fast-paced environment.
• Familiarity with PhotoKit and Image I/O is a plus.

Preferred Qualifications:

• Experience with Agile development methodologies.
• Familiarity with cloud message APIs and push notifications.
• Published applications on the App Store.
• Contributions to open-source projects.

Smartist seeks a talented and motivated Middle iOS developer to join our team and help build and maintain our mobile app. As a Middle iOS developer at Smartist, you will work closely with our senior engineers and product team to develop and deliver high-quality code.

In this role, you will:

• Develop and maintain iOS apps using Swift and the iOS SDK

• Collaborate with marketing, design, and ship new features

• Help maintain code quality, organization, and automation

• Participate in code and design reviews

To be successful in this role, you will need the following:

• At least 2 years of experience developing iOS apps using Swift and the iOS SDK

• Working with UIKit, Core Graphics, Autolayout, GCD

• Experience with Git and version control systems

• Experience with agile development methodologies

• Experience with Alamofire or URLSession

• Hands-on experience with Core Data or Realm

• Strong problem-solving and communication skills

Will be a plus:

• Experience with SpriteKit or SceneKit

• Experience with Core Animation

• Experience with Analytics

• Familiarity with: AWS S3, CloudKit

We are a fast-paced and dynamic company, so we are looking for someone adaptable and eager to learn. If you are a team player with a passion for mobile development, we want to hear from you! Please include a resume and any relevant work samples when applying for this position.

Dataforest is a hard-working and tight-knit team with strong expertise in full-cycle development of data-driven solutions and digital products for international clients.
We value ownership, technical excellence, and transparent collaboration.

We are looking for a React Native Developer to join our highly talented and motivated team and help us build a modern, scalable live streaming platform from scratch.

Requirements:

• 3+ years of experience in mobile software development
• Strong proficiency in React Native and clean code practices
• Solid experience with JavaScript and React.js
• Experience building projects from scratch
• Good understanding of mobile app architecture and software design principles
• Experience working in Agile environments
• Knowledge of application security best practices
• English level: Intermediate or higher

• Еxperience developing project from scratch and independence developing project required

   

Nice to Have:

• AR SDK experience (DeepAR, Banuba, Snap Camera)
• Lottie / SVGA animation systems
• Video feeds (TikTok style)
• Gamification systems
• Push notification platforms
• Analytics integrations

• Experience with creator economy products

   

Responsibilities:

• Develop and maintain mobile applications using React Native
• Participate in all stages of the development lifecycle: analysis, design, implementation, testing
• Build new applications and features from scratch
• Collaborate closely with cross-functional teams
• Contribute to project planning and scheduling

• Identify, troubleshoot, and fix bugs and performance issues

   

We Offer:

• Collaboration with international clients and challenging projects
• Opportunity to build products from scratch using modern technologies
• Personal and professional growth opportunities
• Competitive salary in USD
• Paid vacation and sick leave
• Flexible working schedule
• Friendly team environment with minimal hierarchy
• Team-building activities and corporate events

At A-Players, we are looking for a Senior React Native Engineer to become the first core mobile engineer of a new AI-powered product and help build the foundation of our mobile direction.

This is not a role for someone who wants to focus only on feature implementation. We are looking for an engineer who enjoys ownership, can make architectural decisions, and is excited about building production-ready mobile products from the ground up.

You will work on a new AI-powered self-learning product available across iOS, Android, and Web, while helping establish reusable mobile infrastructure and engineering standards that can later support multiple products across the company.

You will join a fast-moving product environment where speed matters, but quality matters just as much.

‍

Responsibilities:

• Develop and maintain a cross-platform application using React Native for iOS, Android, and Web
• Take ownership of the full mobile development lifecycle, from implementation to production support
• Design and evolve scalable mobile architecture and engineering practices
• Integrate backend APIs, analytics, subscriptions, and payment flows
• Build and maintain event tracking and mobile analytics systems
• Manage App Store and Google Play release processes
• Monitor application performance, crashes, and production stability
• Improve user experience, performance, and overall product quality
• Collaborate closely with Product Managers, Designers, Backend Engineers, QA, and Growth teams

What we look for:

• 4+ years of commercial experience with React Native
• Solid understanding of both iOS and Android platforms
• Experience owning mobile applications beyond feature development
• Strong knowledge of TypeScript
• Experience integrating REST APIs
• Experience with state management solutions
• Understanding of mobile architecture patterns and scalable application design
• Experience with subscriptions, in-app purchases, analytics, and event tracking
• Experience debugging production issues and optimizing application performance
• Upper-Intermediate English or higher

Nice to Have

• Experience with Expo
• Experience with Firebase ecosystem
• Experience building CI/CD pipelines for mobile applications
• Understanding of native mobile modules
• Experience working on subscription-based products
• Active use of AI tools in daily development workflows

‍

We offer:

• Opportunity to become the first core mobile engineer in a growing product ecosystem
• Ability to shape mobile architecture from the very beginning
• Fast decision-making processes with minimal bureaucracy
• Career growth path toward Lead Mobile Engineer
• A supportive atmosphere — we’re all for creativity and providing opportunities for self-fulfillment.
• Working on inspiring products in a team of supportive professionals.
• A competitive salary package based on your unique expertise, skillset, and impact on the product.
• Reimbursement of professional courses and trainings.In-office, and hybrid/remote work opportunities.
• Flexible working hours.
• Professional equipment and access to the necessary programs.
• Paid vacations, sick days, and other benefits.
• Medical insurance.
• Free lunches in the office.
• A variety of corporate events and team-building activities.

About Us

Our team consists of like-minded and motivated professionals passionate about photography, photo editing, and innovations. We are passionate about innovation and excellence, and we are looking for a Strong Middle+ iOS Developer to join our team and help us maintain the highest standards of quality in our mobile apps.

Job Description

As a Strong Middle+ iOS Developer, you will take ownership of key parts of our iOS applications and actively contribute to architectural decisions, performance optimization, and feature development. You will collaborate with designers, product managers, and developers to deliver pixel-perfect, high-performance apps that delight our users. You’ll also have the opportunity to mentor less experienced teammates and help shape the technical direction of our projects.

Key Responsibilities

• Design and implement complex features with a focus on performance, scalability, and clean architecture.
• Participate in defining architecture and choosing the best patterns and frameworks for new and existing products.
• Collaborate with designers to translate UX/UI ideas into functional and visually appealing interfaces.
• Optimize performance and ensure high stability and reliability of existing applications.
• Conduct code reviews, mentor junior developers, and enforce best coding practices across the team.
• Participate in sprint planning and provide accurate time estimations for development tasks.
• Integrate and maintain analytics, attribution, and subscription frameworks such as RevenueCat, AppsFlyer, and Amplitude.

• Stay up-to-date with the latest iOS technologies, trends, and tools to continuously improve development processes.

   

Qualifications

• 3+ years of professional iOS development experience.
• Strong proficiency in Swift and Objective-C (including experience with mixed Swift/Obj-C projects).
• Solid understanding of UIKit.
• Deep knowledge of iOS frameworks, multithreading, memory management, and performance optimization.
• Proven experience implementing clean architectures (MVVM, VIPER, Clean Swift, etc.).
• Hands-on experience with RevenueCat, AppsFlyer, and Amplitude.
• Understanding of asynchronous programming.
• Strong understanding of UIViewController/UIView lifecycle, Auto Layout, Animations, and adaptive UI for iPhone/iPad.
• Familiarity with Gitflow and collaborative team workflows.
• Experience integrating in-app purchases, push notifications. 

• Intermediate+ English for effective communication and documentation.

   

Would Be a Plus

• Experience working with C++ classes to exchange data with the core part of the application (bridging between C++ and Swift/Objective-C layers).
• Experience with Combine or Swift Concurrency (async/await).
• Familiarity with Agile/Scrum methodologies.
• Understanding of UI/UX principles and ability to collaborate closely with designers.
• Bachelor’s degree in Computer Science, Information Technology, or related field.

• Previous experience mentoring or leading small teams.

   

What We Offer

• Flexible working hours and remote work options.
• Comfortable, fully equipped office in Lviv, Ukraine.
• Opportunity to work on high-impact, globally recognized products like TouchRetouch.
• Collaborative and inclusive team culture focused on innovation and quality.
• Paid medical leaves and 28 paid vacation days per year.
• Continuous professional growth through code reviews, internal knowledge sharing, and collaboration with experienced engineers.

We are looking for a highly skilled Senior Android Developer to join a short-term project with an approximate duration of 3 months. The client is a Cambridge-based medical technology company that specializes in advanced solutions for diabetes management.

The Job

A migration project. This is a hands-on engineering role requiring someone who can quickly become productive, perform code migration, implement comprehensive unit testing, and validate the successful operation of the migrated functionality.

Key Responsibilities

• Migrate Android codebases from AWS Android SDK to AWS Kotlin SDK
• Perform Java-to-Kotlin migration where required
• Develop and maintain high-quality, maintainable Android application code
• Create and execute comprehensive unit tests to validate migrated functionality
• Ensure application stability, performance, and reliability throughout the migration process
• Follow best practices for CI/CD, automated testing, and code quality
• Contribute to technical discussions and architectural decisions where appropriate

Required Qualifications

Must-have:

• 5+ years of professional Android development experience
• Strong experience with Android application development using Java and Kotlin
• Experience with AWS Android SDK and/or AWS Kotlin SDK
• Proven experience migrating or modernizing Android codebases
• Strong understanding of writing clean, maintainable, and testable code
• Experience with unit testing and automated testing practices
• Experience with mobile CI/CD tooling, including build and test automation
• Strong communication skills and ability to work independently in a remote environment

Nice to Have:

• Experience in healthcare or medical technology environments
• Experience developing Software as a Medical Device (SaMD)
• Experience working on safety-critical or regulated applications

What Success Looks Like

By the end of the engagement, you will have:

• Successfully migrated targeted functionality from AWS Android SDK to AWS Kotlin SDK
• Completed required Java-to-Kotlin modernization work
• Delivered comprehensive unit test coverage
• Demonstrated successful operation and stability of migrated components
• Left the codebase in a maintainable, well-documented state

Interview Process

1. Pre-screen with Recruitment Manager (45 minutes)
2. Client Interview with Director of Technical Development (60 minutes)
3. Client Technical Screening with Senior Developer (90 minutes)
4. Final Interview with Client Stakeholder (30 minutes)

Job Description

Role Overview:
 

The Senior Full-Stack Developer position at Vertical Television involves acting as a technical pillar and the ultimate “go-to” person within the app development team. The role demands a highly independent professional with a strong frontend orientation, responsible for driving the architecture of a high-scale mobile app and operational web platforms. The developer will contribute to building the future of Vertical Television by combining cinematic storytelling with interactive, vertical-first technology, focusing on scalable application design and performance optimization.

Key Responsibilities:

• System & App Architecture: Architect, plan, and lead the development of the mobile app built with React Native and web platforms using React, ensuring a holistic and scalable system design.
• Vertical Video Feed & Playback: Own the core viewing experience featuring an infinite vertical video feed with instant time-to-first-frame, video preload/prefetch, player-instance recycling, and disciplined memory management across multiple concurrent video players.
• Technical Leadership & Mentorship: Serve as the technical expert and mentor for mid-level developers by providing guidance, conducting code reviews, and elevating engineering standards within the team.
• Standards & Reusability: adherence to coding standards, best practices, and promote a reusability-first mindset to maintain a clean, maintainable, and highly scalable codebase.
• Deep App Performance: Address complex performance challenges including app state management, native bridging, and video rendering optimizations such as player tuning, reducing frame drops, minimizing jank on scroll, and improving cold-start times.
• Monetization: Design and integrate in-app purchases, subscriptions, deep links, attribution, and user-behavior tracking end-to-end, including client SDK implementation and server-side receipt validation.
• Cross-Functional Collaboration: Work closely with Product, Design, and Backend engineering teams to deliver fast iterations of complex features in a dynamic startup environment.

Additional Expertise and Advantages:

• Experience with mobile CI/CD and release operations one of EAS, Fastlane, store submission, OTA updates (CodePush, EAS Update), and end-to-end testing.
• Background in high-growth startups or mobile entertainment products, with familiarity in vertical/short-form feed products similar to TikTok, Reels, or Shorts.
• Understanding of ad-tech and SSAI (AdMob, Google IMA) and subscription monetization modeling.
• Knowledge of DRM technologies (Widevine, FairPlay), offline downloads, and transcoding pipelines (Mux, AWS MediaConvert, AWS IVS) as beneficial skills.

Ideal Candidate Profile includes experience in the following areas: 

Streaming & vertical feed (the differentiator):

• Protocols/players shipped: HLS, LL-HLS (low-latency is the point for "TV"), DASH; react-native-video, Bitmovin, JW Player, ExoPlayer/AVPlayer, Mux, Video.js (web side).
• Vertical-feed mechanics: preload/prefetch strategy, player-instance pooling/recycling, FlashList/recycler usage, memory profiling, time-to-first-frame optimization.
• DRM (Widevine/FairPlay), ABR tuning, thumbnails/scrubbing, offline/download, CDN (CloudFront/Cloudflare/Fastly), transcoding (Mux/AWS MediaConvert/IVS).

RN architecture & performance:

• New Architecture (Fabric, TurboModules, JSI), Hermes; bare RN/CLI vs Expo (and EAS) — get their stance and why.
• Native modules written themselves (Swift/Kotlin/ObjC) — ask for a concrete bridge they built.
• State at scale (Redux Toolkit / Zustand / Jotai), Reanimated + Gesture Handler for the scroll/gesture layer, list virtualization (FlashList).

Monetization & growth plumbing:

• IAP/subscriptions: StoreKit 2, Google Play Billing, RevenueCat, server-side receipt validation.
• Ad-tech if relevant: AdMob, Google IMA, SSAI.
• Deep links/attribution: Branch, AppsFlyer/Adjust, Universal/App Links.

Analytics, quality, release:

• Product analytics: Amplitude/Mixpanel/Firebase; crash/perf: Sentry + Crashlytics, Firebase Performance.
• Testing: Jest, RN Testing Library, Detox or Maestro E2E; mobile CI/CD: EAS / Fastlane; store release management, OTA (CodePush/EAS Update).
• Auth: Cognito/Firebase Auth/Auth0, OAuth (Apple/Google), federated + biometric.

Backend/infra (scope it as secondary if FE-led):

• Node/NestJS or similar; MongoDB/Firebase as named; WebSockets/real-time for comments/live; AWS or GCP IaC (Terraform).

Ajax Systems, an international tech company and the largest manufacturer of security systems in Europe.

We are looking for a new team member to join our System devisions as a Senior Android Developer.

The System Division is responsible for building and developing the Ajax software ecosystem. The team develops and maintains OS Malevich and the Video Management System, builds scalable cloud infrastructure, and creates client applications for multiple platforms, ensuring that all system components work together as a unified ecosystem.

The division works with Java, Kotlin, Swift, C, C++, and Python. It includes embedded, cloud, mobile, and desktop engineers who ensure the stable operation of Ajax as a single digital platform.

Required skills:

• 5+ years of experience in Android development;
• a strong familiarity with Java and Kotlin;
• good understanding of the Android ecosystem;
• familiarity with Android SDK: basic concepts like layouts and views, activities and fragments and their lifecycle, storing data;
• practical experience with Kotlin Coroutines;
• proficiency in Jetpack Compose for modern UI development;
• experience with ORM frameworks and Android Jetpack Components;
• strong understanding of code versioning tools (Git) and experience with Gradle;
• strong understanding of the full mobile development life cycle, OOP principles, design patterns;

• passion for software engineering, learning and continuous improvement.

   

Would be a plus:

• gradle knowledge, custom plugin development, build optimization, CI/CD pipelines, and release management;
• writing unit tests;
• practical experience with video streams;
• experience with MVVM/MVI patterns;
• experience with github actions;

• experience with third-party libraries, APIs (Firebase) and custom frameworks.

   

Tasks and responsibilities:

• follow high standards of software quality established in the team;
• design, build, and maintain high performance, reusable, and reliable code;
• suggest technical and functional improvements to add value to the product;

• collaborate with cross-functional teams to define, design, and ship new application features.

   

We offer:

• the opportunity to suggest and implement your own ideas that directly influence the product and its mass production;
• aplace in a fast-growing company with a motivated and professional team;competitive salary;
• medical insurance;
• corporate English classes;
• the opportunity to participate in Ajax’s internal beta-testing program for security systems;
• discounts from partner companies;

• discounts on Ajax products.

   

Ajax Systems is a Ukrainian success story that has grown into a global product. Ajax devices are trusted by more than 4.5 million end users and 330,000 PRO users in over 180 countries. The company provides comprehensive solutions to protect residential and commercial properties of all sizes. Today, Ajax portfolio includes 280 devices for intrusion protection, video surveillance, fire safety, and comfort and automation.

Senior Mobile / Flutter Developer

We are looking for a Senior Flutter Developer to build a mobile application for sales teams, integrated with CRM/ERP systems.

Responsibilities:

• Develop and maintain the mobile app using Flutter.
• Implement offline-first logic, local data storage, and synchronization.
• Integrate the app with CRM/ERP systems and backend APIs.
• Work with SQL storage and understand when NoSQL is appropriate.
• Implement logging, error handling, and secure data handling.
• Participate in architecture and technical decisions.

Requirements:

• 8+ years of mobile development experience.
• Strong experience with Flutter and Dart.
• Good understanding of offline-first architecture and data sync.
• Experience with SQL databases and local storage.
• Understanding of mobile app security principles.
• Experience with API integrations.
• Ability to design scalable and maintainable mobile architecture.
• Understanding of multi-tenant application logic.

Nice to have:

• Experience with CRM/ERP integrations.
• Experience with enterprise, sales, logistics, or field-service apps.
• Experience with sync conflicts and background synchronization.

Work conditions:

Remote, part-time. Candidates from Europe or Ukraine preferred.

We’re looking for a Senior/Principal iOS & macOS Engineer to join a product team building AI-native applications.

This role is for someone who is equally comfortable building polished Apple platform apps and working with modern AI technologies. You should have strong Swift experience and hands-on experience creating products powered by LLMs, AI agents, tools, and autonomous workflows.

You’ll work directly with the client’s team, helping shape architecture, make technical decisions, and deliver production-ready features from idea to release. We’re looking for a self-sufficient engineer who enjoys solving complex problems and doesn’t need a lot of oversight to move things forward.

What we’re looking for:

• Strong commercial experience with iOS and macOS development
• Deep knowledge of Swift and Apple ecosystem technologies
• Practical experience building AI-powered products using LLMs, agents, tool calling, RAG, or similar approaches
• Ability to design scalable architectures and make sound technical decisions
• Experience taking products from prototype to production
• Strong communication skills and ability to collaborate directly with stakeholders

• English sufficient for daily communication with the client team

   

What you’ll do:

• Design and build AI-native applications for iOS and macOS
• Integrate LLMs, agents, external tools, and automated workflows into real-world products
• Work closely with the client’s engineering and product teams
• Own technical solutions and drive implementation end-to-end
• Ensure reliability, performance, and maintainability of delivered solutions

This is a hands-on senior role. We’re looking for someone who can start quickly, take ownership, and make an impact from day one.

🔑  Ideal candidate:

• 7–10 years in iOS engineering / consulting, with senior-level ownership of complex mobile products

• 5+ years of hands-on Swift experience, including production work with SwiftUI

• Experience with SQLite, GraphQL and/or REST APIs, RxSwift, and Swift Package Manager in real delivery environments

• Experience with architectural patterns such as RIBs or MVI, plus strong practical use of dependency injection

• Solid engineering fundamentals, including memory management, retain cycles, concurrency, threading, Git, and Apple design principles

• Experience publishing iOS apps to the App Store and working with CI/CD pipelines

• Ability to solve complex engineering problems, contribute to technical direction, and mentor others

• Nice to have: enterprise environment experience, strong code review culture, automated testing, cross-functional collaboration with back end and UX/UI, and experience in Scrum / SAFe or long-term consulting setups

🔹 Client - Enterprise Banking Client in the Baltics

• Format: Hybrid (onboarding and occasional in-person meetings in Tallinn, Riga, or Vilnius)