Senior Backend Developer – Kotlin, Spring Boot

HumanIT Digital Consulting

Senior Backend Developer for a Dutch healthtech company building a custom FHIR server. Involves high-abstraction backend work with Kotlin and Spring Boot, remote team collaboration.

Posted 6/18/2026full-timeRemote • 🇳🇱 NetherlandsSeniorWebsite

Tech Stack

Tools & technologies

JUnitKotlinPostgresSpringSpring BootSpringBoot

About the role

Key responsibilities & impact

Help build a custom FHIR server from the ground up
Implement a dynamic query engine that operates on flexible parameters and FHIR structure definitions at runtime
Work closely with a team of 3 internal developers, aligning on design decisions, task division, and progress
Join to implement the remaining components, with a focus on the query engine

Requirements

What you’ll need

Demonstrable experience building abstract backend implementations — query engines, rule engines, dynamic data processing systems, or comparable high-abstraction work
Strong ability to work at a high level of abstraction — the query engine operates on dynamic parameters and FHIR structure definitions, not a fixed set of operations
Solid experience with Kotlin and/or JVM-based backend development; Spring Boot experience strongly preferred
Experience with PostgreSQL, including JSONB storage patterns and complex relational query design
Ability to implement and maintain a comprehensive JUnit test suite alongside production code
Strong communication and collaboration skills — you'll be working closely with the internal team on a shared task breakdown, not independently
Comfortable aligning on design decisions, surfacing blockers, and adapting approach based on team feedback
English B2 or above — required for daily collaboration with an international team
Based in Europe (Portugal preferred), available to work fully remote

Benefits

Comp & perks

🌐 Worldwide ❌ Jobs You've Hidden ⭐️ Saved Jobs ✅ Applied Jobs ✉️ Email Alerts 👤 Account HumanIT Digital Consulting Website LinkedIn All Job Openings 51 - 200 employees Founded 2020 🤝 B2B 🎯 Recruiter B2B
Recruitment HumanIT Digital Consulting is a human-centered digital consulting and talent services firm that helps organizations find, onboard and grow people while delivering digital transformation and IT-related consulting. The company emphasizes people-first values and offers services to both jobseekers and hiring companies across offices in Portugal and Switzerland. HumanIT positions itself as a partner for businesses seeking human talent and for professionals seeking career opportunities in digital and IT roles. Senior Backend Developer – Kotlin, Spring Boot Job not on LinkedIn 🔥 25 minutes ago 🇳🇱 Netherlands – Remote ⏰ Full Time 🟠 Senior 🔙 Backend Engineer JUnit Kotlin Postgres Spring Spring Boot SpringBoot Apply Now Find Hiring Managers Customize resume + cover letter Report problem ☆ Save ☑️ Mark as applied ❌ Hide 📋 Description
Help build a custom FHIR server from the ground up
Implement a dynamic query engine that operates on flexible parameters and FHIR structure definitions at runtime
Work closely with a team of 3 internal developers, aligning on design decisions, task division, and progress
Join to implement the remaining components, with a focus on the query engine 🎯 Requirements
Demonstrable experience building abstract backend implementations — query engines, rule engines, dynamic data processing systems, or comparable high-abstraction work
Strong ability to work at a high level of abstraction — the query engine operates on dynamic parameters and FHIR structure definitions, not a fixed set of operations
Solid experience with Kotlin and/or JVM-based backend development; Spring Boot experience strongly preferred
Experience with PostgreSQL, including JSONB storage patterns and complex relational query design
Ability to implement and maintain a comprehensive JUnit test suite alongside production code
Strong communication and collaboration skills — you'll be working closely with the internal team on a shared task breakdown, not independently
Comfortable aligning on design decisions, surfacing blockers, and adapting approach based on team feedback
English B2 or above — required for daily collaboration with an international team
Based in Europe (Portugal preferred), available to work fully remote Apply Now 📊 Check your resume score for this job Improve your chances of getting an interview by checking your resume score before you apply. Check Resume Score Similar Jobs AI Technical Lead – C++ Ecosystem 🔥 23 hours ago JetBrains 1001 - 5000 🤝 B2B ☁️ SaaS 🤖 Artificial Intelligence Website LinkedIn All Job Openings AI Technical Lead at JetBrains focused on designing AI integrations for C++ developer tools. Building and validating workflows, collaborating across teams to shape AI strategy. 🇳🇱 Netherlands – Remote ⏰ Full Time 🟠 Senior 🔙 Backend Engineer Java Kotlin Senior Backend Software Engineer, Observability 🕒 Yesterday Nebius Group 1001 - 5000 🏢 Enterprise ☁️ SaaS Website LinkedIn All Job Openings Senior Backend Software Engineer developing observability services for AI cloud platform. Building scalable core services and facilitating enhanced operational data insights. 🇳🇱 Netherlands – Remote ⏰ Full Time 🟠 Senior 🔙 Backend Engineer Go Senior Backend Engineer, Elixir 🕒 2 days ago Remote 501 - 1000 👥 HR Tech ☁️ SaaS 🏢 Enterprise Website LinkedIn All Job Openings Senior Backend Engineer developing Elixir APIs and integrations for remote employment solutions. Collaborating with engineers across various teams to build impactful tools and systems. 🇳🇱 Netherlands – Remote 💵 $53.3k - $119.8k / year ⏰ Full Time 🟠 Senior 🔙 Backend Engineer Angular AWS Docker Jenkins Kubernetes Next.js Postgres React Vue.js Back End Engineer 🕒 6 days ago Codekeeper 11 - 50 ☁️ SaaS 🔐 Security 📋 Compliance Website LinkedIn All Job Openings Back End Engineer developing scalable applications using Ruby on Rails and React stack at Codekeeper. Collaborating on new feature development in a remote-first environment and agile culture. 🇳🇱 Netherlands – Remote ⏰ Full Time 🟡 Mid-level 🟠 Senior 🔙 Backend Engineer AWS JavaScript Node.js Python React Ruby Ruby on Rails Full Stack Developer, Javascript 🕒 June 11 Codekeeper 11 - 50 ☁️ SaaS 🔐 Security 📋 Compliance Website LinkedIn All Job Openings Full-Stack Developer creating impactful software in the software escrow industry. Building scalable and efficient applications while collaborating with a dynamic team. 🇳🇱 Netherlands – Remote ⏰ Full Time 🟡 Mid-level 🟠 Senior 🔙 Backend Engineer Apollo Cypress GraphQL JavaScript Jest MySQL Next.js Postgres React TypeScript View More Backend Engineer Jobs 🌐 Worldwide Built by Lior Neu-ner. I'd love to hear your feedback — Get in touch via DM or support@remoterocketship.com Search Search Jobs by country Search jobs by city Search jobs by job title Search entry-level jobs Search junior-level jobs Search senior-level jobs Search jobs by tech stack Search jobs by contract type Search remote internships Search remote part-time jobs Remote jobs Anywhere in the World Companies Hiring Anywhere in the World Companies Hiring Sales People Anywhere in the World Companies Hiring Software Engineers Anywhere in the World Resources Advice Tips for finding remote jobs Interview questions and answers Resume examples Cover letter examples Post a job Affiliates Privacy policy Terms of service Job board SEO course AI Apply Copilot OpenClaw job finder Jobs by Country Remote jobs anywhere in the world (Worldwide remote jobs) Remote jobs United States Remote jobs Australia Remote jobs Brazil Remote jobs Canada Remote jobs France Remote jobs Ireland Remote jobs Germany Remote jobs Netherlands Remote jobs Spain Remote jobs UK Popular Jobs Remote data analyst jobs Remote customer support jobs Remote executive assistant jobs Remote marketing jobs Remote product designer jobs Remote product manager jobs Remote project manager jobs Remote recruiter jobs Remote sales jobs Remote software engineer jobs Jobs by Type Remote full-time jobs Remote part-time jobs Remote contract jobs Remote internship jobs Remote entry-level jobs Remote jobs with no experience required Remote junior jobs (1-3 years of experience) Digital nomad jobs Remote jobs with no degree required Freelance remote jobs Temporary remote jobs Remote jobs hiring now Stay at home mom jobs

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Hard Skills & Tools

KotlinJVM-based backend developmentSpring BootPostgreSQLJSONB storage patternscomplex relational query designJUnitdynamic query engineabstract backend implementationsdynamic data processing systems

Soft Skills

strong communication skillscollaboration skillsability to align on design decisionsadaptabilityproblem-solvingtask divisionprogress trackingteam feedbackhigh level of abstractionsurfacing blockers