Jobs Mobile

Location: Remote
 

About the Role

We are looking for an experienced React Native Developer to join our team and help build high-quality mobile applications. The ideal candidate has strong expertise in modern React Native development, including the New Architecture, and is passionate about delivering scalable, performant, and user-focused mobile experiences.
 

You will work in a remote-first environment, collaborating closely with product, design, and engineering teams to deliver features quickly while maintaining high standards of code quality and reliability.
 

Requirements

Experience & Expertise

• Proven experience with React Native for mobile app development, including the New Architecture (Fabric, JSI, TurboModules).
• Strong portfolio demonstrating development of complex, large-scale apps.
• In-depth understanding of client-server architectures with RESTful APIs.
• Experience with Expo and the managed/bare workflow ecosystem.
• Familiarity with multimedia processing (audio/video handling) is a plus.
   

Technical Skills

• Proficient in TypeScript and modern front-end technologies.
• Experience with state management (Redux Toolkit, Zustand, or similar) and navigation frameworks (React Navigation, Expo Router).
• Knowledge of native module integration and performance optimization, including profiling with Hermes and identifying render bottlenecks.
• Performs meaningful unit and integration tests. Experience with Jest and React Native Testing Library is a plus.
   

AI-Assisted Development

• Actively uses AI coding tools (e.g., Cursor, Claude) to accelerate development.
• Critically reviews and tests AI-generated code before committing.

Delivery Speed

• Demonstrates a bias toward shipping: breaks work into small, reviewable increments and moves features from spec to working code quickly.
• Comfortable making pragmatic tradeoffs; knows when “good enough now” beats “perfect later.”

Communication & Collaboration

• Strong written English; comfortable in async, remote-first environments.
• Proactively surfaces blockers: communicates problems clearly and early, proposes solutions or asks a specific question. Never goes silent on a problem for hours.
• Experience in agile environments; comfortable with short feedback loops and scope changes.

Additional Attributes

• Problem-solving mindset with attention to detail and code quality.
• Self-directed and organized; manages priorities without needing close supervision.
• Proficient with Git, including branching strategies and code review practices.

Project Overview:

We are looking for an iOS Developer to join our mobile engineering team and contribute to the development of high-quality iOS applications. The ideal candidate is passionate about mobile technologies, writes clean and maintainable code, and enjoys working in a collaborative environment.

Customer Overview:

Our client is a technology company transforming the moving and property services industry through Artificial Intelligence and Computer Vision. Its platform automates property surveys and inventory assessments by analyzing photos and videos, helping customers generate accurate moving estimates, property documentation, and digital inspections without the need for traditional on-site visits.
 

Responsibilities:

• Design, develop, and maintain iOS applications using Swift and UIKit/SwiftUI.
• Build responsive and adaptive user interfaces for iPhone and iPad.
• Integrate REST APIs and third-party services.
• Participate in the full software development lifecycle, from requirements analysis to deployment and maintenance.
• Implement and maintain data persistence solutions using Core Data, Realm, SQLite, Keychain, and UserDefaults.
• Collaborate with cross-functional teams including Product, Design, QA, and Backend Engineering.
• Troubleshoot, debug, and optimize application performance.
• Participate in App Store release and post-release support activities.

Skills/Requirements:

• Commercial experience in iOS development.
• Strong knowledge of Swift and iOS SDK.
• Experience with UIKit and/or SwiftUI.
• Understanding of Object-Oriented Programming (OOP) and SOLID principles.
• Experience with REST APIs and JSON.
• Knowledge of GCD, multithreading, and memory management (ARC).
• Experience with AutoLayout, Storyboards/XIBs, and Programmatic UI.
• Familiarity with Git and Agile development processes.
• Understanding of mobile application architecture patterns such as MVC, MVP, MVVM, or VIPER.

About the Project

We're building an enterprise IoT platform that transforms connected devices such as coffee machines, refrigerators, and similar hardware into secure, self-service stations with access control and usage tracking.

As part of the mobile team, you'll develop and maintain two white-label applications used by end users and operators. The mobile layer is built with React Native and Expo, consuming strongly typed backend APIs delivered by the platform team.

The project follows an AI-assisted development approach, supported by a well-defined architecture and engineering standards. You'll work closely with an experienced software architect who oversees the overall system design and code quality. This is a dedicated mobile development role with no backend responsibilities and no direct client communication.

Technology Stack

Mobile

• React Native
• Expo (mandatory)
• TypeScript
• NativeWind
• Tailwind CSS

State Management & Data

• TanStack Query

Testing

• Detox
• Maestro

Development Tools

• Claude Code
• Codex
• GitHub
• Linear
• CodeRabbit

CI/CD & Distribution

• EAS Build
• EAS Submit
• OTA Updates
• App Store & Google Play release pipelines

Responsibilities

• Develop and maintain consumer and operator mobile applications within a shared React Native codebase
• Implement features such as QR/NFC-based access, transaction history, notifications, device monitoring, restocking workflows, issue reporting, and device onboarding
• Build and maintain a scalable white-label architecture supporting multiple brands through configuration-driven theming and feature management
• Integrate with typed backend APIs and ensure robust handling of authentication, loading states, errors, offline scenarios, and synchronization
• Manage the complete mobile release lifecycle, including builds, store submissions, OTA updates, signing certificates, and deployment processes
• Create accessible, responsive, and RTL-compatible user interfaces that meet modern usability standards
• Develop and maintain automated tests, including component, integration, and end-to-end test coverage
• Leverage AI-powered development tools effectively while maintaining strong engineering judgment and ownership of delivered code
• Participate in daily asynchronous communication and weekly project review sessions

Requirements

• 3+ years of professional experience building and shipping React Native applications
• Proven experience with the Expo ecosystem, including EAS Build, EAS Submit, OTA updates, and mobile release management
• At least one production application published on the App Store and/or Google Play (portfolio, store link, or demo required)
• Strong TypeScript and modern React skills, including hooks, component composition, and scalable state management patterns
• Hands-on experience with NativeWind and Tailwind CSS
• Experience building reusable UI components and working with design systems
• Experience implementing white-label or multi-tenant mobile applications is highly desirable
• Solid understanding of mobile API integration patterns, authentication flows, caching, retries, and offline-first considerations
• Experience using AI-assisted coding tools such as Claude Code, Codex, Cursor, or similar solutions in a professional workflow
• Strong written and verbal English communication skills
• Ability to work independently in a remote-first environment

Nice to Have

• Experience with React web applications and the TanStack ecosystem
• Push notification implementation using Expo Notifications, FCM, and APNs
• Experience building custom native modules or Expo config plugins
• Familiarity with Reanimated and Gesture Handler for advanced mobile interactions
• Previous experience delivering white-label, multi-brand, or enterprise mobile products
• Experience working in IoT, connected-device, or hardware-integrated environments

React / Next.js Developer

📍 Remote / Flexible Engagement (Full-time or Part-time)

We are looking for a React / Next.js Developer to join a product-focused team building a modern operations platform in the logistics and e-commerce domain.

This is an opportunity to work on a business-critical application that supports order visibility, delivery tracking, operational workflows, and integrations across multiple systems. The platform is evolving from existing operational tools into a scalable cloud-based solution designed to streamline daily business processes and improve operational efficiency.

Responsibilities

• Develop new frontend features using React, Next.js, and TypeScript.
• Build intuitive interfaces for internal operational workflows.
• Integrate frontend applications with APIs and backend services.
• Create dashboards and management screens for orders, deliveries, statuses, and operational data.
• Implement responsive and mobile-friendly user experiences.
• Translate Figma designs into high-quality production-ready components.
• Collaborate closely with backend engineers, QA, designers, and stakeholders.
• Support real-time or near real-time data updates where required.

• Write clean, maintainable, and scalable code.

   

Requirements

• Strong commercial experience with React.
• Strong experience with Next.js.
• Solid TypeScript skills.
• Experience building business applications, admin panels, dashboards, or internal tools.
• Good understanding of REST APIs and frontend-backend integrations.
• Experience working with asynchronous data, loading states, and error handling.
• Experience implementing designs from Figma.
• Strong understanding of component architecture and reusable UI patterns.
• Ability to work in a fast-moving environment with evolving requirements.

• Good communication and collaboration skills.

   

Nice to Have

• Experience in logistics, transportation, supply chain, e-commerce, or related domains.
• Experience building mobile-friendly web applications.
• Experience with file or photo upload workflows.
• Experience with location-based features, maps, or tracking systems.
• Familiarity with AWS-based environments.
• Experience working on integration-heavy products involving multiple third-party systems.

• Experience with operational dashboards and workflow management platforms.

   

What We Offer

• What’s In It for You?
• Career Growth — Opportunities to develop and advance.
• Performance Reviews — Regular feedback and support.
• Work Anniversaries — Special gifts to celebrate milestones.
• Flexible Work — Hybrid or remote (Lviv office available).
• Mentorship — Guidance from experienced professionals.
• Accounting Support — We handle the paperwork.
• Paid Time Off — 18 vacation days + 5 sick days per year.
• Extra Leave — 10 additional days off annually.
• Free Office Lunches — Enjoy meals on us.
• Team Events — Gatherings, gifts, and a welcoming atmosphere.

Senior .NET / Mobile Developer (Warsaw)

Location: Warsaw, Poland
Employment Type: Full-time, In-House — On-Site Only
Salary: Up to $6,500/month equivalent, depending on experience, plus performance-based bonuses

Communication (Not stricted): English or Polish.

About the Role

One of the largest logistics and storage companies in the region is building a modern technology platform to replace dependency on legacy operational software.

We are looking for a Senior .NET / Mobile Developer to work closely with the CEO and leadership team and help build the platform foundation, integrations, and mobile application.

This is a hands-on senior role for someone who can take ownership of delivery, work independently, and build reliable business-critical software across mobile, APIs, and operational systems.

The platform will connect customer-facing and operational services, including the website, customer portal, mobile app, access control systems, payments, reporting, and notifications through a modern API-driven architecture.

Responsibilities

• Build and maintain backend services using .NET / C#
• Develop and support the mobile application
• Design and implement APIs between business-critical systems
• Work on mobile features including:
  • Secure authentication
  • Biometrics
  • Device-level security
  • Push notifications
  • Bluetooth Low Energy (BLE) integrations
• Build integrations with customer portals, access control systems, payments, reporting, and notifications
• Contribute to technical decisions, documentation, and development standards
• Work directly with senior stakeholders to understand business needs and deliver practical solutions
• Evaluate suitable technologies, platforms, and integrations when required

Requirements

• Strong commercial experience with .NET and C#
• Commercial experience delivering mobile applications
• Hands-on knowledge of mobile security, biometrics, permissions, push notifications, and BLE
• Experience designing and integrating APIs
• Experience building business-critical software platforms
• Understanding of CRM, CMS, ERP, or operational systems
• Recent experience with CMS/CRM-style platforms, preferably Umbraco
• Strong knowledge of databases and cloud infrastructure
• Ability to work independently and take ownership of delivery
• Comfortable working directly with senior stakeholders

What We Offer

• Modern office environment in Warsaw
• Direct access to decision-makers
• Long-term strategic project with visible business impact
• Opportunity to help build a major internal technology platform from the ground up
• Performance-based bonuses
• Potential residency and visa/work permit sponsorship for Ukrainian and other international candidates.

We are looking for flutter developer for our music software

( work in Lviv or Kyiv,

remote work possibility ):

www.MusConv.com

About the project:

MusConv is b2c music software which helps people synchronize their music between music services: Spotify, Apple Music, YouTube Music, Amazon Music, Tidal and others.

We offer:

Challenging interesting project

Professional growth and development program

Flexible schedule

Team of highly talented individuals

Access to developer courses like https://www.pluralsight.com

Mentor: code reviews, studying

We are looking for flutter developer to implement new features

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 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.

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.

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.

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.

🔑  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)