11,087 Kotlin jobs
Open roles that use Kotlin for Android and JVM backends.
Software Engineer, Mobile
Mobile engineer at crypto exchange OKX in Hong Kong building and scaling native iOS or Android apps used by millions — powering trading, payment, and growth systems. Day-to-day involves mobile architecture, performance tuning, testing, CI/CD, cross-functional collaboration, and AI-assisted development workflows.
Senior Kotlin Backend Engineer for High-Volume e-Finance
Sytac BV is hiring a Senior Kotlin Backend Engineer to architect, build, and scale backend services for high-volume financial processing on invoicing and settlement platforms in an agile SCRUM environment. The stack centers on Kotlin, REST APIs, Kafka/RabbitMQ, and modern observability.
Senior Backend Engineer, EV Charging Platform (AI‑First)
Senior Backend Engineer on Fastned's Operator team, building and evolving backend systems that run one of Europe's EV fast-charging networks, including the Revolt Admin tool and an internal operations platform. Core stack: Kotlin/Java, microservices on AWS, Docker/Kubernetes, PostgreSQL; OCPI/OCPP and AI skills are a plus.
Backend Engineer - AI-Driven Kotlin Microservices
Backend engineer at dating app The Inner Circle, helping migrate a PHP monolith to Kotlin microservices in a hybrid Amsterdam setup. Day to day: building scalable backend systems, improving matchmaking, and using AI-assisted coding tools with careful code review.
Backend Engineer
Backend engineer at Inner Circle, a screened dating app in Amsterdam (hybrid), building new Kotlin/Spring Boot/GraphQL services while gradually extracting them from a legacy PHP monolith. Works with MySQL/Aurora, Redis, OpenSearch, RabbitMQ, Kubernetes on AWS, and uses AI/agentic tools like Claude Code daily.
Java Developer (Medior/Senior) – Linkcr
Medior/senior Java developer at Nidaros in Hoogeveen (hybrid) to further develop its product Linkcr: designing, building and maintaining features and components in Java and Kotlin, collaborating on Angular front-end parts, realizing integrations with other systems and databases, and improving code quality, performance and architecture.
Backend Software Engineer
Backend Software Engineer at Kodly in Portugal (flexible/remote options) building and maintaining cloud-based microservice applications with Java or Kotlin, deploying and monitoring on GCP/AWS, and working with Docker, Kubernetes and CI tools like Jenkins in an Agile/DevOps environment.
Lead Software Engineer
Lead Software Engineer at Nox Health, a sleep-healthcare company: the role splits 50/50 between upstream architecture (turning PRDs into technical design docs) and hands-on coding embedded with a Scrum team, building scalable microservices on AWS in Java/Kotlin with PostgreSQL/MongoDB and Angular.
Java Fullstack Developer (French Speaker)
French-speaking Java fullstack developer at IT consulting group moOngy, working hybrid (2-3 days/week in office) in Portugal. Day-to-day: building features in Agile teams with Java 8/17/21, Spring Boot REST APIs, Oracle/PostgreSQL, Kafka/RabbitMQ, Docker/Kubernetes and CI/CD pipelines.
Java & kotlin developer for backend services
Sysmatch is recruiting a backend developer for a multinational technology consulting company in Portugal. Day to day: design and maintain backend services and microservices in Java and Kotlin, build and consume RESTful APIs, review pull requests, debug production issues, and write technical documentation.
Senior Backend Go Developer
Senior backend developer building a multilanguage, cloud-native loan-broker platform for fintech client Axo Group — owning Go services on AWS end-to-end (APIs, event-driven queues/jobs, PostgreSQL) in an AI-first workflow using Claude Code. Hybrid: 2 days/week from the Lisbon office.
Senior Developer Backend
Senior backend developer at a sleep-health company, designing, building, and maintaining scalable backend systems for the Nox Cloud platform in Agile teams. Core stack is Java/Kotlin with Spring, Hibernate, and SQL/NoSQL databases, plus production troubleshooting and code reviews.
Staff Java Backend Developer
Staff-level backend developer at Mindera designing and building robust, scalable backend systems in Kotlin/Java, owning the technical side of development across the full SDLC in an Agile team, including mentoring juniors. Core stack: Terraform, Kafka, Kubernetes, GraphQL Federation, Azure Cloud, Git and CI/CD, with TDD-driven testing.
Backend go developer in fintech
Senior backend engineer owning Go feature delivery end to end on AWS (Lambda, EventBridge, SQS, RDS) for a fintech: event-driven APIs, PostgreSQL tuning, ADR/HLD documentation, CI/CD, and GDPR/EU AI Act compliance. Mentors juniors and reviews AI-agent (Claude Code) output. Hybrid Lisbon: 2 office days, 3 from home.
Backend Developer (Kotlin/Java) – Remoto (Portugal)
Senior backend developer designing and building scalable Java/Kotlin services through the full development cycle, from idea to deploy, in a collaborative agile team. Requires 5+ years of Java/Kotlin backend experience plus CI/CD, Terraform, TDD and Git; Spring Boot and Agile are pluses.
Backend Developer (Java)
Backend Developer building RESTful APIs and event-driven microservices in Java (Spring, or Micronaut/Quarkus) with RabbitMQ/Kafka, MySQL/MariaDB, Git, JUnit/Mockito and Maven/Gradle in a Scrum environment, at Elevus, a recruitment and outsourcing company.