Remote Kotlin jobs

You will join Tempo as a Senior AI/ML Engineer, focusing on the intersection of large language models, real-time signal processing, and enterprise decision-making. This position requires shipping production-grade AI features rather than conducting isolated research. Working alongside domain engineers, you will establish patterns for prompt design, agent architecture, and model evaluation. The goal is to create reliable AI systems that help organizations manage time, resources, and planning more effectively.

• Senior AI/ML Engineer
• Fully remote role
• Python + Kotlin/TS
• LLM & Agent focus

You will own the technical reliability of marketing integrations within Acorns' mobile applications. Working across Mobile Engineering, Data Engineering, and Marketing teams, you will implement SDKs, validate event data, and resolve attribution discrepancies to support financial wellness products.

• Senior level role
• Fully remote (US)
• iOS + Android focus
• Martech & Adtech

You will define client architecture and public APIs for native mobile SDKs, leveraging deep expertise in either iOS or Android. The team builds secure, lightweight foundations that are easy for customer engineering teams to integrate and operate. As a senior engineer, you set standards for compatibility, diagnostics, and performance. You will collaborate with product and security partners to transform security problems into dependable developer products while mentoring native mobile engineers.

• Senior Mobile SDK Engineer
• Fully remote position
• iOS Swift or Android Kotlin
• Mobile security focus

You will design and evolve high-quality Android experiences using modern frameworks like Kotlin and Jetpack Compose. The role involves owning complex features, setting technical direction, and partnering with product, design, and backend teams to deliver reliable customer value. While Android-first, the position requires practical iOS experience to collaborate on shared mobile standards. You will contribute to Swift or SwiftUI changes when needed and help improve overall mobile delivery practices through mentoring and code review.

• Senior Android Engineer
• Kotlin + Jetpack Compose
• U.S. Citizenship required
• Public Trust clearance

As a Security Architect at BJAK, you will define security architecture across products, applications, and cloud platforms. You will partner with Engineering, Product, and Compliance teams to build secure systems that meet regulatory requirements in Southeast Asia. You will lead threat modeling, design reviews, and implementation of security controls for AWS and GCP environments. Your work ensures the safety of millions of users accessing insurance and financial services through mobile-first platforms.

• Fully remote role
• Security Architecture
• AWS and GCP
• Regulatory compliance

Join BJAK, the leading mobile-first insurance platform in Southeast Asia, as an Application Security Engineer. You will secure web applications, APIs, and backend services while coordinating with mobile stakeholders to manage cross-platform risks. Your work will focus on integrating security into design, development, and release workflows. You will help redefine how people in the region plan, save, and grow their money by ensuring robust protection for financial applications.

• Fully remote (Global)
• AppSec + Pen Testing
• OWASP Top 10 Expertise
• 3+ Years Experience

Join BJAK, the leading insurance platform in Southeast Asia, as an Application Security Engineer. You will secure web applications, APIs, and backend services while coordinating with mobile stakeholders on cross-platform risks. Your work ensures security is embedded into design, development, testing, and release workflows.

• AppSec Engineer
• 3+ years experience
• English required
• Global team

As a Security Architect at BJAK, you will define security architecture across products, applications, and cloud platforms. You will partner with Engineering, Product, and Compliance teams to build secure systems that meet regulatory requirements in Southeast Asia. You will lead threat modeling, design reviews, and the implementation of security controls for AWS and GCP environments. Your work ensures that BJAK’s mobile-first insurance and financial services remain secure and compliant.

• Security Architecture
• AWS & GCP
• Regulatory Compliance
• Senior Level

Lead one of two teams within Institutional Transfers, focusing on either the foundational platform architecture or expanding product offerings for account moves. You will balance technical direction with team growth, ensuring reliable and efficient money movement for clients while partnering with Product, Design, and Operations.

• Engineering Manager
• Hybrid (North America)
• Fintech & Transfers
• Ruby on Rails stack

Actai is developing proactive, AI-native applications for daily tasks like communication and organization. Their first product is an agent-first mobile app designed to integrate intelligence into conversations and workflows with minimal prompting. As an Android Software Engineer, you own the client experience, ensuring AI interactions feel natural and performant. You will build a robust application where reliability and clarity are paramount, moving beyond simple thin-client architectures.

• Kotlin + AI integration
• 3+ years experience
• Small high-density team
• Production Android apps

You will own the Android client experience for Actai's proactive mobile application, ensuring AI interactions feel natural and performant. The work involves building a production-grade app where AI capabilities such as voice, vision, and recommendations are core to the user workflow. The team operates with high autonomy and speed, focusing on eliminating misinformation and reducing coordination costs through intelligent, minimal-prompting interfaces. You will collaborate closely with backend and ML engineers to define API contracts and optimize system behavior.

• Kotlin + AI integration
• 3+ years experience
• Small high-density team
• Production Android apps

You will own the Android client experience for Actai's proactive mobile application, ensuring AI interactions feel natural and performant. The work involves building a thick client where performance, reliability, and clarity are critical to daily user workflows. The team operates with high autonomy and collective decision-making, aiming to ship high-quality work rapidly. You will collaborate closely with backend and ML engineers to define API contracts and system behavior for AI-heavy flows.

• Android + Kotlin
• AI integration focus
• Small high-density team
• 3+ years experience

You will own the Android client experience for Actai's proactive mobile application, ensuring AI interactions feel natural and performant. The work involves building a thick client where performance, reliability, and clarity are critical to the product's success. The team aims to eliminate misinformation and reduce coordination costs by bringing intelligence to daily workflows with minimal prompting. You will collaborate closely with backend and ML engineers to define API contracts and system behavior.

• Kotlin + Android
• AI integration focus
• Small high-density team
• 3+ years experience

You will own the Android client experience for Actai's first product, an agent-first mobile communication app designed to integrate AI into daily workflows with minimal prompting. The role involves building a robust application where performance, reliability, and clarity are critical, rather than acting as a thin client for backend services. Working closely with backend and ML engineers, you will design UX patterns for AI interactions such as streaming responses and handle non-deterministic behaviors. The team values rapid execution, collective decision-making, and independent judgment to deliver a high-quality product to global users.

• Android + Kotlin
• AI-native mobile app
• 3+ years experience
• Small high-density team

You will own the Android client experience for Actai's first product, an agent-first mobile communication app designed to integrate AI into daily workflows with minimal prompting. The role involves building a robust application where performance, reliability, and clarity are critical, rather than acting as a thin client. The team operates with high talent density, making collective decisions and moving rapidly to ship high-quality work. You will collaborate closely with backend and ML engineers to define API contracts and ensure the app handles AI-heavy flows efficiently.

• Android + Kotlin
• AI-native mobile app
• Small high-impact team
• 3+ years experience

You will own the Android client experience for Actai's first product, an agent-first mobile communication app designed to integrate AI into daily workflows with minimal prompting. The role involves building a robust application where performance, reliability, and clarity are critical, rather than acting as a thin client for backend services. Working closely with backend and ML engineers, you will design UX patterns for AI interactions such as streaming responses and handle the complexities of non-deterministic behavior. The team values independent execution, collective decision-making, and rapid shipping of high-quality work.

• Kotlin + Android
• AI-native product
• 3+ years experience
• Small high-density team

You will own the Android client experience for Actai’s first product, an agent-first mobile communication app. The goal is to integrate AI into daily workflows like conversations and organization with minimal prompting. This is not a thin client role. You will build a robust application where performance, reliability, and clarity of AI behavior are critical. You will collaborate closely with backend and ML engineers to define API contracts and system behavior.

• Android + Kotlin
• AI-native mobile app
• Small high-talent team
• 3+ years experience

You will own the Android client experience for Actai's first product, an agent-first mobile communication app designed to integrate AI into daily workflows with minimal prompting. The role involves building a robust application where performance, reliability, and clarity are critical, rather than developing a thin client. The team operates with high talent density, making collective decisions and moving rapidly to ship high-quality work. You will collaborate closely with backend and ML engineers to define API contracts and ensure the app handles AI-heavy flows efficiently.

• Android + Kotlin
• AI-native mobile app
• Small high-density team
• 3+ years experience

You will own the Android client experience for Actai's proactive mobile application, ensuring AI features feel natural and performant. The work involves building robust interfaces for chat, vision, and voice capabilities while optimizing for low latency and reliability on mobile devices. The team operates with high autonomy and collective decision-making, aiming to integrate intelligence into daily workflows without complex prompting. You will collaborate closely with backend and ML engineers to define API contracts and system behaviors.

• Kotlin + Android
• AI-native product
• Small elite team
• 3+ years exp

Lead the architecture and scaling of large, customer-facing React Native applications. You will coordinate development teams, build mobile libraries, and implement shared business logic using Kotlin Multiplatform for iOS and Android targets.

• Fully remote (Spain)
• React Native + KMP
• Up to €80k/year
• Tech Lead level

Join the Consumer Mobile team at Kraken to build a new application tailored for users in Asia. You will leverage React Native to deliver fast, trustworthy trading and financial tools while navigating regional design expectations and connectivity challenges. This position demands strong product judgment and end-to-end feature ownership. You will collaborate closely with Product and Design teams to solve ambiguous client problems and improve user experience through data-driven iteration.

• Senior React Native role
• Focus on Asian markets
• Fully remote position
• Crypto fintech domain

Join the Consumer Mobile team at Kraken to build a new application specifically designed for users in Asia. You will leverage React Native to deliver fast and trustworthy financial interfaces, addressing unique regional UX expectations and connectivity challenges. This role requires end-to-end ownership of features, from problem definition to launch. You will collaborate closely with Product and Design teams to shape solutions that improve client journeys in trading and product discovery.

• Senior React Native role
• Focus on Asian markets
• Fully remote position
• Crypto fintech product

You will serve as the primary technical escalation point for database issues, blending support skills with hands-on coding. The team works on Airbyte’s open-source data movement platform, ensuring reliable data access for AI agents and enterprise systems.

• Fully remote (Canada)
• Java + Kotlin
• Database connectors
• Senior level

You will serve as the primary technical escalation point for database issues, debugging complex replication bugs and query problems. Beyond support, you will write code in Java and Kotlin to fix bugs in Airbyte’s open-source database connectors and improve the Bulk CDK. The team focuses on enabling AI agents and enterprises to move mission-critical data across various sources and destinations. You will collaborate closely with engineering and product teams to root-cause issues and enhance platform reliability.

• Fully remote (US)
• Java + Kotlin
• Database connectors
• Open-source contributions

Join XBOW to develop tools that autonomously discover and validate vulnerabilities using AI. You will work on end-to-end features, connecting TypeScript APIs and React interfaces with robust backend systems in Kotlin and Go deployed on AWS.

• Full-time position
• TypeScript + Go + Kotlin
• AWS cloud infrastructure
• Early-stage startup

Lead the Experiences team responsible for member happiness and retention through incremental improvements and new features. You will manage six engineers directly while collaborating with Product, Design, Data Science, and Content teams to deliver high-quality consumer-facing experiences.

• Senior Engineering Manager
• Manage 6 engineers
• Consumer-facing product
• AI-assisted tools

Join Voize as a Senior Fullstack Engineer to co-own the development of their internal ML App. This platform handles data annotation, exploration, and model evaluation while managing sensitive health data flows. Your work will replace third-party vendor tools and enable HIPAA-compliant training on US customer data.

• Senior Fullstack Engineer
• Freelance contract
• Hybrid in Germany
• React + Kotlin

Join Voize as a Senior Freelance Android Engineer to develop tools that reduce administrative burdens for frontline healthcare workers. You will own the technical implementation of Android features, working from concept to launch to improve daily workflows for nurses and medical staff.

• Senior Freelance Role
• Kotlin & Jetpack Compose
• Remote (FR/DE/UK)
• Min. 3-month contract

You will own the long-term evolution of the Moonshot Flutter application, defining architecture and engineering practices. Working closely with Design and Product, you will build a scalable design system and deliver interactive trading features like live charts and order management. This position requires driving mobile performance, reliability, and testing standards while mentoring the team. You will collaborate with backend engineers on API design and participate in on-call rotations to ensure app stability.

• Staff level role
• Flutter, iOS, Android
• Remote (North America)
• NYC preferred

Voize builds AI companions that handle digital workflows for frontline workers, allowing them to focus on people rather than busywork. Backed by significant Series A funding, the team serves over 200,000 users across thousands of facilities. As a Senior Android Engineer, you will own the technical implementation of Android applications. You will collaborate with product and engineering teams to deliver features from concept to launch, ensuring intuitive user experiences.

• Senior Android Engineer
• Kotlin & Jetpack Compose
• Fully remote (Poland)
• English C1 required

Join Hims & Hers as a Sr. Staff Engineer to shape the long-term technical landscape of a leading public health and wellness company. You will define architectural vision, drive cross-functional alignment, and ensure system resilience while supporting personalized patient care at scale. This position operates at an organizational level, requiring you to establish design patterns, remove blockers, and translate business goals into scalable technical solutions. You will mentor other technical leaders and foster a culture of engineering rigor and continuous learning.

• Sr. Staff Level
• Fully Remote (US)
• Kotlin, Java, or Go
• AWS & Kubernetes

Emergence is building an R&D Center of Excellence in Cairo to elevate engineering standards across its portfolio of B2B software companies. As the founding leader, you will build and manage a team of engineers who are embedded into portfolio companies in healthcare, automotive, and infrastructure sectors. This role combines organizational leadership with technical depth. You will define hiring standards, oversee deployment models, and drive cross-cutting capabilities like AI and automation. You report directly to the co-founder and work closely with CEOs and CTOs of portfolio companies.

• Fully remote (Egypt)
• Founding leadership role
• Paid in USD
• Senior/Lead level

Join the team behind Canada’s first zero-commission brokerage to own critical frontend projects. You will build and improve client-facing surfaces for order execution, options trading, and real-time market data. The work demands high standards for performance, reliability, and correctness given the financial stakes.

• Senior Front End Engineer
• React + TypeScript
• Hybrid (North America)
• Trading & Investing

Join the Web Dependability Engineering team to ensure seamless browsing experiences across DuckDuckGo's desktop and mobile applications. You will act as the resident expert on web compatibility, diagnosing why sites break and implementing durable fixes. Recent initiatives include reverse-engineering site detection of privacy protections, shimming browser APIs, and developing LLM agent pipelines to automate issue triage. You will take full ownership of projects from scoping to execution in a culture that values trust and empowered project management.

• Senior level role
• Fully remote worldwide
• JavaScript + Web Standards
• €157k base salary (EU)

Uberall's GEO team builds products that help multi-location brands improve their visibility in AI-powered search engines like ChatGPT and Gemini. As Backend Engineering Lead, you will combine people leadership with active coding to shape the architecture behind these AI-search products. You will guide the team in navigating the technical ambiguities of generative AI while ensuring reliable, scalable backend solutions. This role requires staying close to the work, contributing to design and code reviews, and translating customer needs into maintainable systems.

• Lead Backend Engineer
• Kotlin + Spring Boot
• People management + coding
• AI/LLM integration focus

As a Solutions Architect at Atomic, you will bridge the gap between customer development teams and internal engineering. You will guide partners through onboarding, resolve technical integration challenges, and ensure successful implementation of payroll and financial data connectivity solutions. The team works with major financial institutions and neobanks to improve consumer financial management. You will provide expert guidance, create technical resources, and drive product improvements based on direct customer feedback.

• Fully remote role
• Solutions Architect
• JavaScript, Kotlin, Swift
• Fintech industry

Join BJAK as an Android Engineer to develop the native experience for their AI Neobank application. You will focus on creating clean user flows, ensuring fast performance, and shipping reliable features for real customers across Southeast Asia. The team values product quality and collaboration with design, backend, and AI engineers. You will take ownership of app stability, performance, and user experience from concept to production.

• Fully remote (Thailand)
• Kotlin + Jetpack
• AI Neobank App
• Senior level expected

You will develop the native Android experience for BJAK, focusing on insurance, payments, and financial services. The team prioritizes clean user flows, fast performance, and reliable feature delivery for real customers across Southeast Asia. Working with product and design, you will simplify complex user journeys and ensure app stability. The role requires strong ownership of code quality, performance metrics, and seamless API integration.

• Fully remote (Thailand)
• Kotlin + Jetpack Compose
• Senior level role
• English required

You will develop the native Android experience for BJAK, focusing on insurance, payments, and financial services. The team aims to simplify complex user journeys while ensuring high performance, stability, and security for real customers.

• Remote (Singapore only)
• Kotlin + Jetpack Compose
• 3+ years experience
• English required

Join BJAK, a leading mobile-first insurance platform in Southeast Asia, as an Android Software Engineer. You will build native Android features using Kotlin, focusing on clean user flows, performance, and reliability for insurance, payments, and financial services. The team works globally with a strong emphasis on product quality and fast execution. This position is remote-friendly but strictly limited to candidates currently residing in Korea to serve the local market.

• Fully remote (Korea only)
• Kotlin + Jetpack Compose
• Senior level role
• English required

You will develop the native Android experience for BJAK, focusing on insurance, payments, and financial services. The team aims to simplify complex user journeys while ensuring high performance, stability, and security for real customers. Working with product and design teams, you will ship reliable mobile features and optimize app metrics such as crash rates and memory usage. The role requires strong ownership and a focus on delivering quality products in a fast-paced environment.

• Fully remote (Vietnam)
• Kotlin + Jetpack Compose
• 3+ years experience
• English required

Join BJAK, a leading mobile-first insurance platform in Southeast Asia, as an Android Software Engineer. You will build and ship native Android features using Kotlin, focusing on clean user flows for insurance, payments, and financial services. The team values fast execution, product quality, and reliable mobile experiences. You will collaborate with product and design teams to simplify complex user journeys and integrate backend APIs while ensuring app stability and performance.

• Fully remote (Sweden)
• Kotlin + Jetpack Compose
• Senior level role
• English required

Join BJAK, a leading mobile-first insurance platform in Southeast Asia, as an Android Software Engineer. You will build and ship native Android features using Kotlin, focusing on clean user flows for insurance, payments, and financial services. The team values fast execution, product quality, and reliable mobile experiences. You will collaborate with product and design teams to simplify complex user journeys and integrate backend APIs securely.

• Fully remote (Spain)
• Kotlin + Jetpack Compose
• Senior level role
• English required

Join BJAK, a leading mobile-first insurance platform in Southeast Asia, as an Android Software Engineer. You will build and ship native Android features using Kotlin, focusing on clean user flows for insurance, payments, and financial services. The team values product quality, fast performance, and reliable mobile experiences for real customers.

• Fully remote (Ireland)
• Kotlin + Jetpack Compose
• Senior level role
• Fast hiring process

Join BJAK, a leading mobile-first insurance platform in Southeast Asia, as an Android Software Engineer. You will build and ship native Android features using Kotlin, focusing on clean user flows for insurance, payments, and financial services. The team values fast execution, product quality, and reliable mobile experiences. You will collaborate with product and design teams to simplify complex user journeys and integrate backend APIs securely.

• Fully remote (Portugal)
• Kotlin + Jetpack Compose
• Senior level role
• English required

Join BJAK as an Android Engineer to develop the native experience for their AI Neobank application. You will transform complex financial processes into simple, high-performance mobile features used by real customers across Southeast Asia. The team values clean user flows, product quality, and reliable shipping. You will collaborate with product, design, backend, and AI engineers to take features from concept to production while maintaining high standards for app stability and performance.

• Fully remote (Indonesia)
• Kotlin + Jetpack
• AI Neobank App
• Senior level expected

You will engineer the native Android experience for BJAK's AI Neobank App, handling features like onboarding, payments, and AI-assisted journeys. The team prioritizes clean user flows, fast performance, and product quality, working closely with design, backend, and AI engineers to ship reliable features used by real customers.

• Fully remote (Singapore)
• Kotlin + Jetpack
• AI Neobank App
• Senior level expected

Join BJAK as an Android Engineer to develop the native experience for their AI-powered Neobank application. You will collaborate with product and design teams to simplify complex financial journeys, including insurance, payments, and investing, ensuring high performance and reliability for users across Southeast Asia.

• Fully remote (Indonesia)
• Kotlin + Jetpack Compose
• AI Finance Agent
• Senior level

Join BJAK as an Android Engineer to develop the native experience for their AI-powered Neobank application. You will collaborate with product and design teams to simplify complex financial journeys, ensuring high performance and reliability for users across Southeast Asia. The team values fast execution and ownership, looking for builders who prioritize user experience and code quality. You will work on features related to insurance, payments, and savings, leveraging modern Android architecture and on-device AI inference.

• Fully remote (Thailand)
• Kotlin + Jetpack Compose
• AI Finance Agent
• Senior level

Join BJAK, a leading insurance and financial platform in Southeast Asia, as an Android Engineer. You will develop the native Android experience for the company's AI Neobank App, focusing on clean user flows and high performance. The team works globally to help users manage spending, saving, and investing. You will collaborate with product, design, and backend teams to ship reliable mobile features used by real customers.

• Fully remote (Vietnam)
• Kotlin + Jetpack
• AI Neobank App
• Senior level expected