Jobs

Our mission at Geniusee is to help businesses thrive through tech partnerships and strengthen the engineering community by sharing knowledge and creating opportunities🌿
Our values are Continuous Growth, Team Synergy, Taking Responsibility, Conscious Openness and Result Driven. We offer a safe, inclusive and productive environment for all team members, and we’re always open to feedback💜 If you want to work from home or work in the offices in Kyiv or Lviv with stable electricity and Wi-Fi , great — apply right now.
 

About the project:
USA
AI document generation and signing

Requirements:

● Proficiency in Kotlin with 3+ years of hands-on experience in backend development;
● Solid understanding of OOP, functional programming, and clean architecture principles;
● Experience with Spring Boot or other Kotlin-compatible frameworks;
● Familiarity with RESTful APIs, JSON, and web service integration;
● Good knowledge of databases: both relational (e.g., PostgreSQL, MySQL) and/or NoSQL (e.g., MongoDB);
● Experience with asynchronous programming and coroutines in Kotlin;
● Basic understanding of CI/CD pipelines, Git, and version control best practices;
● Unit testing and integration testing experience using tools like JUnit, MockK, or similar;
● Experience with Quarkus, Micronaut, Event scheduling;
● Upper-Intermediate English or higher.
 

Responsibilities:

● Develop and maintain scalable, reliable, and maintainable Kotlin-based applications;
● Collaborate with product managers, designers, and other developers to deliver high-quality features;
● Write clean, testable, and efficient code following best practices and coding standards;
● Participate in code reviews, architecture discussions, and contribute to technical decision-making;
● Debug and resolve issues in production and development environments;
● Integrate third-party APIs and services;
● Contribute to the improvement of development processes, tooling, and team productivity;
● Stay up to date with Kotlin ecosystem trends and propose relevant improvements or innovations.
 

Nice to have:
● Experience with Docker, Kubernetes, or cloud platforms (AWS);
● Familiarity with GraphQL;
● Knowledge of Android development is a plus;
● Understanding of microservice architecture.
 

What will you get:
● Competitive salary and good compensation package;
● Exciting, challenging and stable startup projects with a modern stack;
● Corporate English course;
● Ability to practice English and communication skills through permanent interaction with clients from all over the world;
● Professional study compensation, online courses and certifications;
● Career development opportunity, semi-annual and annual salary review process;
● Necessary equipment to perform work tasks;
● VIP medical insurance or sports coverage;
● Informal and friendly atmosphere;
● The ability to focus on your work: a lack of bureaucracy and micromanagement;
● Flexible working hours (start your day between 8:00 and 11:30);
● Team buildings, corporate events;
● Paid vacation (18 working days) and sick leaves;
● Cozy offices in 2 cities ( Kyiv & Lviv ) with electricity and Wi-Fi ( Generator & Starlink);
● Compensation for coworking (except for employees from Kyiv and Lviv);
● Corporate lunch + soft skills clubs;
● Unlimited work from home from anywhere in the world (remote);
● Geniusee has its own charity fund.

This is a full-time remote role for a Junior/Middle Kotlin/Java Backend Engineer at Fintech project. The role involves day-to-day tasks such as analysing requirements, working on back-end development, API integrations, and mainly programming using Kotlin, Spring Frameworks, RESTful API, PostgreSQL, Apache Kafka, Redis, Git, Github, Docker.

We are looking for a remote generalist senior backend engineer with experience in Java (and preferably Kotlin) to join our early team to build our product from zero to one. Your role will include projects working with other team members including building integrations into enterprise systems, scraping, contributing to systems to allows users to use LLMs to generate sales insights at scale, and scrape, processing & deriving insights from millions of public documents.

You might be a fit if you:

• Are a senior developer with Enterprise B2B SaaS experience or Big data processing experience in the JVM ecosystem and ideally Kotlin.
• Are excited to roll up your sleeves and work in all parts of the backend and have experience working in small teams & startups. Ideally have experience working in a fast-growing startup.
• Ideally experience with the following stack:
  • Kotlin (BE)
  • GCP
  • Google Cloud SQL for PostgreSQL
  • Firebase
  • Python
• Have experience with some of the following (not required):
  • Natural Language Generation
  • Enterprise API integrations
  • Prompt Engineering
  • Large Scale Web Scraping & Parsing

Hi!

We are looking for a skilled and self-driven Kotlin Multiplatform Engineer to join our dynamic team and contribute to cutting-edge fintech and digital asset management platforms. In this role, you’ll be instrumental in building high-performance, cross-platform applications that serve thousands of users and scale to millions of requests.

As part of our team, you’ll collaborate with PMs, BAs, QAs, and engineers across back-end, front-end, and mobile, delivering secure, intuitive, and scalable products.

This position is available both full-time and part-time.
 

Required Skills

• 3–4+ years of experience in mobile application development (cross-platform focus)
• Strong expertise in Kotlin and Android SDK
• Proficiency with Jetpack Compose and/or XML layouts
• Solid understanding of Material Design and Android UI/UX guidelines
• Experience with REST API integrations (GraphQL a plus)
• Familiarity with CI/CD tools (Bitrise, GitHub Actions)
• Hands-on experience with Firebase (Analytics, Crashlytics, Push Notifications)
• Experience integrating third-party SDKs
• Publishing apps to Google Play
• Strong knowledge of unit testing and QA automation
• Performance optimization and profiling expertise
   

Responsibilities

• Develop and maintain Android & iOS applications using Kotlin Multiplatform
• Collaborate with the team to design, build, and ship new features
• Ensure app scalability, security, and high performance
• Implement API integrations and reusable components
• Participate in Agile ceremonies and actively contribute to product improvements
   

Nice-to-Have

• Familiarity with Kotlin Multiplatform shared logic (Android/iOS)
• Experience with Node.js, Next.js, SendGrid, HTML/CSS, web services
• Understanding of cross-platform UI/UX principles
• Background in fintech or the crypto industry
• Hands-on experience using AI tools to accelerate development
• Knowledge of security and compliance standards (PIPEDA, GDPR, CCPA)
   

Additional Pluses

• Experience with GraphQL and third-party SDK integration
• Strong proactivity and ability to work autonomously
• Ability to thrive in distributed teams
• Leveraging AI tools for faster development
   

Tech Stack

Node.js · Kotlin Multiplatform (shared logic) · Next.js · Firebase · SendGrid · HTML · CSS · Web Services

We offer:

Interesting, influential projects;
Long-term cooperation with a full-time involvement;
Flexible work schedule and Remote or hybrid cooperation;
Professional development with an individual plan of growth;
Stable salary and planned reviews;
Paid vacation and sick leave (21 vacations and 10 sick days);
Weekends on all public holidays;
Medical insurance package;
Corporate team building including trips;
Professional workshops and training;
Excellent team of dedicated professionals;
Development budget for each employee;
Corporate English;
Strong corporate culture.

About us:

Erbis is a thriving tech powerhouse where innovation meets opportunity. We specialize in building cutting-edge software solutions that drive success for businesses worldwide. At Erbis, we don’t just develop software. We create impact. And to do that, we need the best talent in the industry. That’s where you come in.

About our client:

Our client is a leading e-commerce company focused on expanding its backend capabilities to support rapid growth and deliver seamless online experiences. They are committed to innovation, scalability and building high-performing systems that power their platform.

Requirements:

• Proven experience in Kotlin development
• Strong experience with RESTful APIs and microservices architecture
• Proficiency in Spring Boot or Ktor frameworks
• Experience working with relational databases

Nice-to-haves:

• Background in the e-commerce or logistics industries

Responsibilities: 

• Design, develop, and maintain backend services using Kotlin and Spring Boot
• Implement APIs and microservices to support the company’s e-commerce platform
• Collaborate closely with product managers, designers, and developers to align on new features and functionality
• Ensure backend systems are scalable, secure, and high-performing
• Contribute to the improvement of development practices and overall system architecture

About the project & role:
You will be joining a high-impact, cross-functional team responsible for building and maintaining a modern, high-performance mobile e-commerce platform. The application serves millions of active users, providing a seamless shopping experience, personalized content, and efficient checkout flows. The project involves developing shared business logic using Kotlin Multiplatform, as well as contributing to Android and iOS native layers, ensuring feature parity and high code quality across both platforms. You will work on new feature development, performance optimization, and complex integrations, collaborating closely with backend, product, and design teams. The ideal candidate is passionate about mobile technology, code quality, and cross-platform architecture, and is ready to take ownership in a fast-moving, product-oriented environment.

What We Need From Candidate:

• 4+ years of experience with Android development using Kotlin. Experience with modern Android libraries and patterns such as Jetpack Compose for UI and AndroidX libraries.
• English level — Upper-Intermediate (B2)
• Solid knowledge of modern Android libraries and architecture (e.g., AndroidX, Jetpack Compose, MVVM/MVI patterns).
• Quality & Best Practices: Ability to write high-quality, secure, and maintainable code. Experience implementing thorough testing (unit and integration tests) for mobile apps. Familiarity with secure coding guidelines and tools to detect and remediate vulnerabilities in mobile applications.
• CI/CD & Deployment: Comfortable with mobile CI/CD pipelines and app distribution processes. For example, configuring automated builds, tests, and deployments to the App Store and Google Play. Knowledge of managing provisioning profiles, certificates, signing, and Play Console release tracks.
• API Integration: Solid understanding of RESTful API integration and network security in mobile apps. While this role is mobile-focused, you should be adept at working with backend services (authentication APIs, cloud sync endpoints) and handling data serialization, encryption, and synchronization with cloud systems.
• Team Collaboration: Excellent communication and teamwork skills. Proven ability to work closely with designers, product managers, and backend engineers to shape feature requirements and deliver end-to-end functionality. Comfortable in an agile development environment, giving and receiving feedback on code and design.
   

Nice to have:

• Cross-Platform Planning: Experience coordinating feature parity between iOS and Android platforms. You understand how to design solutions that play to each platform’s strengths while delivering a consistent user experience across both.
• Experience with Kotlin Multiplatform Mobile (KMM/KMP) — building shared modules for Android and iOS.
• Good understanding of iOS development principles; experience with Swift is a plus.
• Experience with large-scale e-commerce or retail mobile applications.
• Performance Optimization: Knowledge of optimizing cryptographic operations and biometric interactions on mobile devices for a smooth user experience. Experience diagnosing and improving app performance, battery usage, and security-related performance (e.g. encryption overhead).
• Education: A Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field is preferred (or equivalent real-world experience).
   

What We Offer:

• Opportunity to implement your ideas, tools, and approaches. We are open to changes and suggestions aimed at improvement
• Work on a strategic, large-scale international project with high visibility.
• Remote-friendly culture with strong team collaboration.

Role description

The Market-wide Half-Hourly Settlement (MHHS) Program is a key initiative shaping the future of the UK energy market. The system enables the measurement and processing of electricity consumption data every half hour — providing a more accurate view of real energy usage. This drives fairer tariffs, supports renewable integration, and fosters a more efficient, data-driven energy ecosystem.

As a Backend Engineer, you will play a central role in building and maintaining the core data processing flows of the MHHS system, ensuring scalability, reliability, and accuracy of large-scale data operations. You’ll work within the IOps pod, collaborating with cross-functional teams to design, develop, and evolve high-performance backend services running on the JVM stack.

We’re looking for an engineer who thrives in complex data-driven environments, learns new frameworks quickly, and contributes to the continuous improvement of our architecture and delivery practices.

Responsibilities

• Design, build, and maintain core backend components and data processing flows for the MHHS platform 
• Implement reliable, efficient, and scalable services using Kotlin and Java (JVM) 
• Work with frameworks such as Quarkus and Spring (DI) to develop and integrate backend services 
• Apply ORM and persistence best practices using Hibernate 
• Collaborate closely with other engineers, data specialists, and DevOps to ensure smooth system integration
• Contribute to the CI/CD pipeline and modern software delivery practices 
• Ensure observability, fault tolerance, and performance optimization of backend services 
• Participate in code reviews, architectural discussions, and continuous improvement of engineering practices 
• Support Agile delivery through estimation, planning, and iterative value delivery 

• Promote clean code principles, testing culture, and high engineering standards

   

Requirements

• 5+ years of experience in backend development using Java and/or Kotlin 
• Proficiency with Hibernate and relational databases (SQL, PostgreSQL) 
• Hands-on experience with Spring Boot or Quarkus frameworks 
• Experience with CI/CD pipelines, version control (Git), and Agile delivery practices
• Experience with Docker and cloud environments (AWS and/or GCP)
• Knowledge of Kafka, message queues
• Understanding of event-driven architecture and RESTful APIs
• Experience building reliable, scalable backend systems with a strong observability and security focus 
• Excellent problem-solving and analytical skills 
• Upper-intermediate English and effective communication in distributed teams
  
   

Nice to have:

• TypeScript skills — ability to understand or contribute to backend code when needed 
• Understanding of energy sector data flows 

N-iX is a global software development service company that helps businesses across the globe create next-generation software products. Founded in 2002, we unite 2,400+ tech-savvy professionals across 40+ countries, working on impactful projects for industry leaders and Fortune 500 companies. Our expertise spans cloud, data, AI/ML, embedded software, IoT, and more, driving digital transformation across finance, manufacturing, telecom, healthcare, and other industries. 

Join N-iX and become part of a team where your ideas make a real impact.

About the Client

Our customer is a leading provider of onboard retail technology and mobile solutions for the travel and retail industries. The company designs and builds digital products that transform how airlines, trains, and retailers manage in-motion sales, inventory, and customer experiences. We are forming a dedicated Kotlin Multiplatform (KMP) team to build a new cross-platform mobile application from the ground up - one codebase, two native experiences: iOS and Android.

You’ll lead a small, highly capable Scrum team (engineers, QA, designer), collaborate closely with backend and product teams, and establish technical excellence in the mobile domain.

Responsibilities

• Own the architecture and technical roadmap for a new Kotlin Multiplatform (KMP) mobile product that powers both iOS and Android.
• Estimate MVP development and other product phases. 
• Define clean, modular architecture using modern patterns (Clean Architecture / MVI / MVVM / modularization).
• Lead and mentor a small cross-functional mobile team; perform code reviews and ensure adherence to best practices.
• Design and implement shared business logic and platform-specific layers, ensuring native UX and optimal performance.
• Make key technical decisions on frameworks, libraries, CI/CD tools, and delivery processes.
• Drive cross-platform UI strategy (Compose Multiplatform, Jetpack Compose, SwiftUI integration).
• Collaborate with backend engineers to define efficient API contracts (REST / GraphQL).
• Establish and maintain automated build, testing, and release pipelines for Android and iOS.
• Ensure robust app security, observability, and performance monitoring across both platforms.
• Promote engineering excellence: documentation, testing culture, DevOps alignment, and continuous improvement.

• Act as a technical liaison between product management and engineering, translating business goals into scalable mobile solutions.

   

Must-Have Skills

• 7+ years of experience in mobile app development, with at least 3 years in Kotlin Multiplatform (KMP) 
• Experience in high-level product estimation and roadmap development.
• Proven record of delivering production-grade mobile applications for both iOS and Android using KMP.
• Deep understanding of Kotlin (coroutines, flows, multiplatform libraries, shared data models, serialization).
• Expertise in Android (Jetpack Compose) and iOS (Swift/SwiftUI) with a strong grasp of platform internals and performance tuning.
• Experience with device-to-device communication protocols, especially Bluetooth/BLE.
• Strong architectural mindset — experienced in designing scalable, testable, modular architectures.
• Proficiency with Ktor Client, SQLDelight, or similar for data and networking layers.
• Experience in offline-first architectures, synchronization logic, and push notifications.
• Hands-on experience building CI/CD pipelines (GitHub Actions, Bitrise, Fastlane, Jenkins) and managing app releases (Play Store, App Store).
• Solid understanding of security, performance, and offline-first mobile patterns.
• Demonstrated ability to lead teams, perform technical reviews, and mentor developers.
• Excellent communication and collaboration skills; comfortable working with international teams.
• Knowledge of observability stacks (Crashlytics, Firebase, Sentry).

• Professional fluency in English.

   

Would be a plus

• Experience of mesh networking protocols and device-to-device communication.

   

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers

Senior Kotlin Developer

Proficiency in Kotlin with 3+ years of hands-on experience in backend development;
● Experience with Quarkus, Micronaut, Event scheduling;
● Solid understanding of OOP, functional programming, and clean architecture principles;
● Experience with Spring Boot or other Kotlin-compatible frameworks;
● Familiarity with RESTful APIs, JSON, and web service integration;
● Good knowledge of databases: both relational (e.g., PostgreSQL, MySQL) and/or NoSQL (e.g., MongoDB);
● Experience with asynchronous programming and coroutines in Kotlin;
● Basic understanding of CI/CD pipelines, Git, and version control best practices;
● Unit testing and integration testing experience using tools like JUnit, MockK, or similar;
● Experience with Quarkus, Micronaut, Event scheduling;
● Upper-Intermediate English or higher.

Responsibilities:

● Develop and maintain scalable, reliable, and maintainable Kotlin-based applications;
● Collaborate with product managers, designers, and other developers to deliver high-quality features;
● Write clean, testable, and efficient code following best practices and coding standards;
● Participate in code reviews, architecture discussions, and contribute to technical decision-making;
● Debug and resolve issues in production and development environments;
● Integrate third-party APIs and services;
● Contribute to the improvement of development processes, tooling, and team productivity;
● Stay up to date with Kotlin ecosystem trends and propose relevant improvements or innovations.

Nice to have:
● Experience with Docker, Kubernetes, or cloud platforms (AWS);
● Familiarity with GraphQL;
● Knowledge of Android development is a plus;
● Understanding of microservice architecture;

LetyShops — це продуктова тех-компанія, яка створює один із топових кешбек-сервісів у світі. Засновані в Україні ще у 2014 році, ми пройшли шлях від локального стартапу до бренду, якому довіряють 36 мільйонів користувачів у 35+ країнах. І ми не зупиняємось!

Зараз ми шукаємо Middle Backend Engineer, який_а доєднається до команди нашого нового продукту, що зашейпить майбутнє мобільного шопінгу! Це можливість масштабувати новий мобільний продукт, який вже протестували перші 1000 користувачів. Можливість перетворити світовий мобільний шопінг на щось дійсно нове пліч-о-пліч з талановитою командою.

Твої суперсили:

• Маєш 3+ роки досвіду комерційної бекенд розробки
• Володієш однією з мов програмування [Kotlin, Python, TypeScript] і готовий/а заглиблюватись у нові
• Працював_ла з базами даних (PostgreSQL, MongoDB) і добре розумієш принципи зберігання та доступу до даних.
• Маєш досвід роботи з асинхронними чергами (Kafka) та комунікаціями між сервісами (gRPC)
• Комфортно почуваєшся у хмарному середовищі (AWS) і розумієш принципи контейнеризації (Docker, Kubernetes)
• Ти проактивний/а, не боїшся «закатати рукави» та працювати у швидкому середовищі з великою кількістю нетривіальних задачок

• Маєш англійську на рівні B2+

   

Чим ти будеш займатися:

• Підключати магазини до платформи: працювати з парсингом товарів, інтеграцією даних та трекінгом
• Обробляти великі обсяги різних даних — від збору й збереження до обробки й оптимізації
• Робити свій внесок у побудову бекенд-архітектуру для масштабованих і надійних систем
• Співпрацювати з крос-функціональною командою для пошуку оптимальних підходів та покращення продукту і якості системи

Круті бонуси від LetyShops:

• Ми завжди поруч: зберігаємо повну зарплату і місце за мобілізованими колегами, закриваємо половину суми зборів для твоїх близьких та підтримуємо Сили оборони України власними ініціативами.
• Офіційне працевлаштування, щедра відпустка (20 днів відпочинку + лікарняні), медичне страхування
• Комфортна дистанційка + гнучкий графік
• Компенсація навчання: хочеш вчитися? Ми оплатимо половину!
• Ну і, звісно, кешбек — роби покупки та отримуй ще більше вигоди з кешбеком Х2 на letyshops.com 🙂

Наш хайрінг процес:

[знайомство з рекрутеркою → інтро-кол з майбутнім менеджером → технічна співбесіда → співбесіда з VP of Engineering → співбесіда з СЕО → офер 💛]

Mirko Solutions — міжнародна IT-компанія, що спеціалізується на веб та мобільній розробці для клієнтів із США, Канади, ЄС та Австралії. Ми швидко ростемо і зараз шукаємо 1–2 Senior Web Kotlin Developer для інноваційного Insurtech-проєкту.

Проєкт

Компанія, яка створює платформу для страхових компаній (P&C insurers, reinsurers, MGAs) з метою:

• підвищення точності прийняття рішень у ціноутворенні та андеррайтингу;
• використання decision intelligence, predictive modelling, AI/ML та аналітики;
• автоматизації процесів, зменшення ручної роботи та покращення точності loss ratios / pricing;
• пришвидшення робочих потоків у страхуванні.

Вимоги:

• 3+ років досвіду у веб-розробці;
• глибокі знання Kotlin;
• досвід роботи з Ktor та Spring Boot;
• впевнене володіння Hibernate / Spring;
• досвід проєктування та оптимізації складних систем;
• рівень англійської — B2.

Умови:

• Старт: ASAP
• Зайнятість: повна

• Локація: (remote)

   

 Шукаємо Kotlin-розробника, який готовий долучитися до створення нових продуктів із нуля.

Обов’язкові вимоги:

• Впевнене знання Kotlin (курси, pet- або навчальні проєкти).
• Розуміння ООП, патернів проєктування, основ архітектури застосунків.
• Базові знання Android SDK або Kotlin backend-фреймворків (Spring Boot, Ktor).
• Уміння працювати з REST API, JSON.
• Навички роботи з Git.
• Наявність MacBook для роботи.
• Готовність навчатися, адаптуватися та розвиватися в команді.

Буде плюсом:

• Досвід участі в pet-проєктах або хакатонах.
• Знання Coroutines, Flow, RxJava.
• Розуміння принципів тестування та досвід написання юнiт-тестів.
• Досвід роботи з базами даних (Room, SQLite, PostgreSQL).
• Знайомство з CI/CD.
• Досвід публікації застосунків або розгортання серверних сервісів.

Особисті якості:

• Відповідальність і увага до деталей.
• Уміння швидко навчатися та працювати за інструкціями.
• Командність, комунікабельність.

Умови:

• Гнучкий графік роботи (приблизно 8 годин на день).
• Оплата двічі на місяць.
• Підтримка команди та наставництво.
• Тестове завдання перед стартом співпраці.

Якщо ти шукаєш проєкт, де можна рости як розробник і впливати на кінцевий результат — приєднуйся до нас!