Source Job

Europe

  • Design and implement a dynamic query engine for FHIR-based data structures using Kotlin and Spring Boot.
  • Contribute to a custom FHIR server with PostgreSQL, JSONB modeling, and comprehensive test coverage.
  • Collaborate with a small team on architecture, design decisions, and healthcare interoperability challenges.

Kotlin Spring Boot PostgreSQL FHIR JUnit

20 jobs similar to Senior Backend Developer (Kotlin/Spring Boot)

Jobs ranked by similarity.

Latin America

  • Design and implement robust backend services using Java, Spring, Spring Boot, and Spring Batch.
  • Architect scalable distributed systems and microservices, and build RESTful APIs for core financial products.
  • Mentor junior engineers and enforce best practices while collaborating with stakeholders to align technical solutions with business goals.

Clara is a leading B2B fintech for spend management in Latin America, helping over 20,000 businesses with corporate cards, bill pay, financing, and a B2B platform. It is certified as one of the world's fastest-growing companies, a Great Place to Work, and a LinkedIn Top Startup, with a high-talent-density culture and a team distributed across the Americas.

Ukraine

  • Collaborate with development team, Product Owner, and Engineering Manager on product tasks.
  • Design and implement application architecture and ensure code quality.
  • Write efficient code using Spring, microservices, and persistence frameworks.

Kyivstar.Tech is a Ukrainian hybrid IT company and a subsidiary of Kyivstar, one of Ukraine's largest telecom operators. With over 600 specialists, we drive meaningful change through innovative tech solutions in mobile, web, and high-performance systems.

Brazil

  • Design and develop robust, scalable microservices using Kotlin and Java.
  • Ensure code excellence through TDD, DDD, Clean Code, and Hexagonal Architecture.
  • Collaborate with the team and client, owning the full product lifecycle from conception to deployment and maintenance.

CI&T helps large companies turn AI potential into real business impact through AI deployment, AI-native execution, and tech-integrated solutions. With 30 years of experience, they have 8,000 employees across 25+ countries, fostering a collaborative and innovative culture.

US Unlimited PTO 12w maternity 12w paternity

  • Develop core components on an Engineering pod with a focus on scalable backend services and RESTful APIs.
  • Measure and optimize the performance, scalability, and uptime of backend services.
  • Collaborate with product management, customer success, and support to deliver the best user experience.

Branch empowers workers with financial freedom by accelerating payments and providing accessible financial services. They are a remote-first FinTech company with a collaborative culture and employees across the U.S.

Latin America

  • Build and maintain clean, efficient, and highly scalable backend services using Java ecosystems and modern frameworks.
  • Optimize big data infrastructure, assisting in the implementation of systems that process, stream, and analyze massive datasets.
  • Own quality assurance by conducting thorough testing of software structures to guarantee high performance and system resilience.

CodeRoad provides end-to-end software development services, helping businesses scale with ideal infrastructure solutions. They operate as a nearshore technology services provider, empowering businesses to thrive in an ever-evolving digital landscape.

Europe

  • Build Cloud-native, AWS-based greenfield software and invent solutions to various user, business, and technical challenges.
  • Operate a 'build it and own it' culture with a DevOps and individual contributor mindset.
  • Be a key member of a fast-growing global team, shaping the back-end building squads for scale.

Santander Auto Software is building a brand-new global software platform and product suite for international customers, focusing on creative technology solutions. The company is a 100% tech-focused, cross-border team with a leadership team of experienced tech professionals, promoting equal opportunities regardless of gender, culture, or disability.

Global

  • Design and develop backend microservices for telecom platform modules including Identity, RBAC, and billing pipelines.
  • Integrate with external carrier APIs, event-driven systems like Kafka, and workflow orchestration tools such as Temporal.io.
  • Collaborate with Frontend Engineers and Business Analysts to define API contracts and participate in CI/CD and code reviews.

Miratech is a global IT services and consulting company that helps visionaries change the world by supporting digital transformation for large enterprises. The company retains nearly 1000 full-time professionals, achieves over 99% project success rate, and has more than 30% year-over-year revenue growth.

Global

  • Implement software components according to design specifications and perform system integration and testing.
  • Perform unit testing, participate in estimating project efforts, and collaborate with stakeholders.
  • Support and optimize CI/CD processes and provide technical input into product roadmaps.

Miratech is a global IT services and consulting company that helps visionaries change the world by supporting digital transformation for large enterprises. The company retains nearly 1000 full-time professionals, operates in over 25 countries, and has a culture of Relentless Performance with a 99% project success rate.

Norway

  • Design, develop, and maintain cloud-native applications and microservices using Java and Spring Boot.
  • Build intuitive user interfaces with Angular and modern web technologies for a mission-critical platform.
  • Contribute to architectural decisions ensuring high availability, scalability, and disaster recovery.

Everbridge is a global leader in critical communications and enterprise safety solutions, helping governments and organizations protect communities during emergencies. The company employs over 1,500 people across the world, fostering a mission-driven culture focused on saving lives and keeping businesses running.

UK

  • Design, develop, and optimize scalable shared backend services using Java and serverless technologies (AWS Lambda).
  • Design and implement RESTful APIs and event-driven systems, contributing to frontend components as needed.
  • Collaborate with cross-functional teams, mentor junior developers, and maintain CI/CD pipelines for high-quality software delivery.

Turnitin is a recognized innovator in global education, partnering with educators and institutions for over 25 years to develop learning integrity solutions. With over 16,000 academic institutions and team members in 35+ countries, the company fosters a remote-first culture focused on purpose, accountability, and well-being.

Serbia

  • Lead the design and development of scalable backend APIs and services integrating with cloud services, focusing on IBM Cloud.
  • Collaborate with product, infrastructure, and partner teams to design intuitive and maintainable interfaces.
  • Influence long-term architecture and technical direction for Sysdig's integrations with IBM Cloud.

Sysdig creates cloud security tools, including the open-source Falco project for threat detection. It is trusted by over 60% of the Fortune 500 and recognized as a Best Place to Work and one of Deloitte's fastest-growing companies for the past 5 years.

India

  • Design, implement, and maintain microservices using Python, Go, and Java.
  • Build and scale cloud-based software products, online services, and data pipelines for millions of transactions.
  • Collaborate on security, reliability, and automation while supporting testing and troubleshooting.

Ocrolus helps lenders automate workflows with an AI platform that processes nearly one million credit applications monthly with over 99% accuracy. Trusted by 400+ customers including Better Mortgage and SoFi, it is a fast-growing, remote-first team of builders and problem solvers.

Netherlands Europe

  • Develop and optimize backend services for core product features related to app ratings, reviews, and performance analytics.
  • Design systems for automating user interactions with customer reviews and build data processing pipelines for large-scale user feedback.
  • Contribute to AI-powered capabilities including semantic analysis, text summarization, and intelligent automation features.

This position is listed on behalf of a partner company that builds a global SaaS platform for app performance, user feedback, and marketplace analytics. They are a fast-growing company with an international engineering culture focused on knowledge sharing and continuous improvement.

Spain

  • Own the Java client and JDBC driver end-to-end: roadmap, API design, performance, release engineering, and partner-facing support.
  • Drive throughput and latency improvements across the client and ClickHouse server.
  • Engage directly with external partners on interoperability, regressions, and roadmap alignment.

ClickHouse is a real-time analytics database company recognized on the 2025 Forbes Cloud 100 list. With over 3,000 customers and 250% year-over-year ARR growth, it is a fast-growing private cloud company on a mission to transform how companies use data.

Brazil

  • Build and expand a large-scale healthcare data platform and member management solution.
  • Design, develop, and maintain high-performance backend services and APIs.
  • Mentor junior and mid-level engineers through technical guidance and code reviews.

Ubiminds is a GPTW-certified, people-first company that partners with American software product companies to scale their development teams. They connect Brazil’s top 5% talent with innovative U.S. companies through staff augmentation and employer-of-record services.

US

  • Drive system design and architecture decisions for scalability, performance, and maintainability.
  • Design and develop applications across backend (Java, Spring Boot, APIs), frontend (React/Angular), and database (PostgreSQL).
  • Conduct regular code reviews and enforce standards to ensure performance, security, and maintainability.

Mind Computing is a technology company that provides software solutions and support for government projects, including the Department of Veterans Affairs. They seek a full-time, 100% remote Senior Full Stack Java Developer to join their team in an Agile environment.

Canada

  • Design and build shared persistence and storage abstraction layers for a large-scale cloud platform.
  • Develop event-driven pipelines and database tooling to standardize data storage and access.
  • Optimize system performance, data integrity, and platform efficiency at scale.

Jobgether is an AI-powered job matching platform that connects candidates with hiring companies. They process applications fairly using technology and support a remote-first work environment.

Hungary

  • Maintain and evolve a massive Ruby on Rails monolith while integrating new features in Kotlin, Spring Boot, and TypeScript.
  • Solve complex problems with an analytical mindset across a polyglot tech stack including Java, Ruby, and Postgres.
  • Thrive in a direct, opinionated engineering culture that values honest feedback and constructive friction.

They create Bridge, a software for learning and career development, helping organizations build cultures where people thrive. The global team of engineers, product managers, and designers operates with an async, trust-based culture emphasizing autonomy and results.

Romania Poland

  • Design, develop, and maintain backend services for the Aggregation Platform, enabling seamless integrations between game providers and operators.
  • Build and enhance API-first solutions that support scalable, high-performance, and business-critical systems.
  • Develop secure, maintainable, and high-quality code while following engineering best practices.

Software Mind develops solutions that make an impact for companies around the globe. Our culture embraces openness, acts with respect, shows grit & guts and combines employment with enjoyment.

Global 16w maternity 16w paternity

  • Complex and meaningful challenges enabling people and businesses to operate globally with ease.
  • Significant impact on business growth with freedom to organize work and life around your needs.
  • Competitive salary, stock options, flexible paid time off, and a supportive, kind work environment.

Remote is a global employment platform that helps businesses hire, pay, and manage international teams compliantly. With a fully remote workforce across 6 continents and a culture focused on innovation and automation, the company supports asynchronous work and provides a supportive environment.