Senior Fullstack Web Developer

Lead Architecture, Impact, and Content DirectionAs a Senior Fullstack Web Developer at Divotion, you will take the initiative in addressing complex web development challenges. You will assist organizations in creating scalable and future-proof front-end solutions, directly influencing architecture, code quality, and team development. Your deep technical expe…

Join Our Team as a Fullstack Developer!About LegionellaDossierAt LegionellaDossier, we are dedicated to revolutionizing water safety for businesses. Our innovative platform empowers organizations to efficiently manage water safety, maintain compliance, and optimize workflows, ensuring the safety of individuals and the smooth operation of businesses.We are excited to embark on a transformative journey, completely overhauling our platform to adopt a modern, scalable architecture using Node.js and React Native. To achieve this vision, we are seeking a talented Fullstack Developer who is eager to contribute to the future of water safety software.Your RoleAs part of our dynamic development team, you'll play a key role in crafting the next iteration of our product, ranging from backend microservices to mobile applications. You don’t need to be a master in every technology; if you excel in Node.js or React Native and are keen to expand your skill set, we welcome your application!In this role, you will collaborate closely with product and design teams to translate ideas into functional, user-friendly features.Your MissionEnhance and expand our Node.js microservices platform.Create engaging mobile experiences utilizing React Native.Contribute to architecture and API design discussions.Produce clean, maintainable, and thoroughly tested code.Provide insights to improve performance, developer experience, and code quality.Investigate and implement AI-assisted development tools to boost productivity.

We are seeking a talented and experienced Senior Full-Stack Developer to join our dynamic team at SanaCommerce. In this role, you will be responsible for designing, developing, and maintaining innovative web applications that enhance our customers’ experiences. You will work closely with cross-functional teams to deliver high-quality software solutions that meet business needs.

Organizations are eager to innovate faster than ever before, and this is where you come in. As a Senior Mendix Developer, you will create intelligent, scalable solutions at record speed, seamlessly connecting AI, IoT, and business-critical processes. Your expertise will drive digital transformations that shape the future for clients such as Defense, LPMW, DGC, and 4Sure. Are you ready to make an impact?Your Key Role in Digital TransformationYou will work on complex enterprise-grade Mendix applications for top-tier organizations. As the expert, you will define the technical direction, develop strategies, and elevate your team to new heights. Whether it's enhancing traffic flow or monitoring water quality, your work will have a tangible impact.Your Impact in Practice:Developing enterprise Mendix applications with millions of users.Experimenting with the latest Mendix features and AI integrations.Leading complex development projects at industry-leading companies.Defining the technical direction for next-level Mendix solutions.Elevating the team with your expertise.

Contribute to a platform that truly makes a difference for our clients and the healthcare professionals who assist them.As a Senior Mendix Developer, you will play a pivotal role in the continuous development of Mijn Prescan: the digital core through which over 150,000 clients manage their personal health information, while supporting our staff in both administrative and medical processes.With your extensive technical expertise, you will translate complex business challenges into smart, user-friendly, and future-proof solutions within the Mendix ecosystem. You will actively contribute to the architecture of our entire Mendix landscape and have a clear vision for how we can continuously enhance the platform.You will naturally take a leadership role: guiding fellow developers, sharing knowledge, and elevating both the team and the platform to new heights. Collaborating with a multidisciplinary Scrum team, you will work on innovative solutions that foster a healthy, reliable, and seamless client journey.

Ready to take the next step in your career?Are you an experienced exam developer who thrives on taking charge, meticulously managing projects, and confidently leading the content? Do you want to apply your expertise to complex development projects while also mentoring fellow developers? If so, we at Examenservices, part of Innovam, are eager to meet you!Your RoleAs a Senior Exam Developer at Examenservices, you will be the guiding force for our complex development projects. You will oversee content quality and ensure that examination products with high stakes are accurate and reliable. You'll monitor quality standards, make informed decisions, and serve as the primary point of contact for colleagues, the foundation, and other stakeholders. Combining your knowledge of assessment and examination with your organizational skills, you will prioritize tasks and ensure a smooth process.You will translate our clients' annual plans—mbo examination foundations across various sectors—into clear, prioritized development assignments that are actionable for everyone involved.You will manage timelines, budgets, capacity, and risks effectively.You will provide structure, maintain oversight, and translate strategic goals into executable assignments, ensuring projects not only start well but are also completed on time.Mentoring (junior) developers will be a key aspect of your role. You will leverage your experience and expertise to help colleagues learn, take bold steps, and continually improve in their professions.Alongside other senior developers and examination advisors, you will work towards a shared vision for examination. In your discussions, you will set the course, address quality issues, and translate strategic decisions into clear directions for exam development, where your voice will carry significant weight.

Speechify’s mission is to remove reading barriers and make learning accessible to all. Over 50 million people worldwide use our text-to-speech tools to convert content, including PDFs, books, Google Docs, news articles, and websites, into audio. This helps users read more quickly, retain information, and learn more efficiently. Our product suite spans iOS, Android, Mac, a Chrome extension, and a web app. Google named Speechify its Chrome Extension of the Year, and Apple has featured us as App of the Day. About the Team Nearly 200 people work at Speechify, all fully remote. The team includes frontend and backend engineers, AI researchers, and professionals with backgrounds at Amazon, Microsoft, and Google. We also have alumni from top PhD programs like Stanford and founders from startups such as Stripe and Vercel. Role Overview This Tech Lead position focuses on our Web Core Product and Chrome Extension in Utrecht. The role suits someone who thinks strategically, enjoys building products, and cares about delivering strong user experiences. What Makes This Role Unique Work in a flat structure where technical leadership is recognized through expertise and consistent results Shape products used by millions and recognized by industry leaders Collaborate with a diverse, talented, and remote-first team What We Value Strong work ethic and drive to achieve ambitious goals Clear, effective communication Ability to deliver high-quality results in a collaborative setting Interview Process The process includes several technical assessments and typically wraps up within one week.

Why You Should Join Cloud Republic as a Senior Java Developer:Personal Growth is essential for you. Learning something new each week invigorates your passion for development.Flexibility and Freedom are priorities for both you and us. We highly value work-life balance and are committed to accommodating your needs.Work with Amazing Clients such as Defense, Police, LeasePlan, BMW, and various ministries.As a Java Developer at Cloud Republic, you'll enjoy a diverse role that allows for daily growth. You will advise, build, and test applications for our clients in the Netherlands. You will be involved from the design phase and work on exciting, challenging projects. Utilizing technologies like Java, Spring Framework, JUnit, and other open-source tools, you’ll create applications that you can be proud of.About Cloud RepublicWe are proudly part of the Caesar Group, known for over 25 years for our IT services. We support all phases of the IT process through consultancy, projects, secondment, and management. Our work spans various technologies, including .NET, Java, and integration projects, and we have plenty of ongoing tasks with challenging assignments. Therefore, we aim to expand our team with ambitious Java colleagues. Will you grow with us?Paul Ouburg - Java Developer: “I appreciate being able to stay on one assignment for longer. This allows me to genuinely understand the business and the people. It’s challenging to achieve that when constantly switching projects. Luckily, Caesar has many long-term clients. You feel very connected to Caesar, even while in secondment. We have team days at our office, which fosters connection!”People-Oriented. Technically Strong. Free to Grow.At Cloud Republic, you’ll work on cloud solutions that genuinely make a difference. You’ll find yourself in an open, informal culture where you’re not just a number, but part of a close-knit group of professionals. We set high standards in technology and collaboration, grant you significant freedom in how you work, and expect accountability in return. Here, you will grow quickly—as a developer and as a person.Read the blog on 'building the future at Cloud Republic' or watch this video about working at Cloud Republic:

Why You Should Join Cloud Republic as a Cloud DeveloperYou prioritize personal development and thrive on learning something new every week.You enjoy collaborating with colleagues and appreciate working in teams on-site with clients.Freedom and flexibility are essential for you—whether it's recording a podcast or exploring a new technology, you're all in!Looking for social activities? We have plenty! From kicking off the weekend with beers from our in-house brewery 'Oproer' to playing in D&D sessions or game nights.At Cloud Republic, we are recognized specialists in Cloud Native Development. We embrace the latest technologies and are eager to innovate. Together, we are committed to crafting outstanding solutions for our clients. We balance hard work with enjoyment, constantly challenging each other. Are you ready to elevate our team with your expertise and craftsmanship? Become a Cloud Developer at Cloud Republic!Dennis Wirken - Cloud Developer: "Working at Cloud Republic means tackling challenging and innovative projects, abundant training opportunities, and a strong focus on personal growth. I appreciate the short lines of communication within the organization. Plus, there are many fun activities and outings."People-Oriented. Technically Proficient. Free to Grow.At Cloud Republic, you will work on cloud solutions that genuinely make a difference. You'll find yourself in an open, informal culture where you're not just a number but part of a close-knit group of professionals. We set high standards in technology and teamwork, granting you significant autonomy in your work while expecting accountability in return. Here, you will grow rapidly—both as a developer and as an individual.About UsWe work in teams to develop innovative Cloud Native solutions for clients such as NS, Rijksmuseum, and Cito. In this role, you will actively contribute your insights during the development process and leverage your skills to advance the team and our clients. Most of our projects are greenfield development, meaning no legacy code for you!Your Workweek Will Look Like This:Collaborate with colleagues like Martijn and others on exciting projects.

You are not just a code monkey.You build ecosystems.At adesso Benelux, we do not develop standalone applications; we create comprehensive Microsoft architectures that integrate .NET, Azure, Dynamics 365 CE, and the Power Platform.For us, Azure is not merely a platform; it serves as the extension layer around Dataverse, Dynamics, and complex enterprise landscapes.Do you thrive in environments where integration, security, and performance are essential? Where scalability is not just a bonus but a necessity?If so, this role is a perfect fit for you.Your ResponsibilitiesDevelop modern applications and APIs using .NET (C#) and ASP.NET Core.Create cloud-native solutions utilizing Azure App Services, Functions, Storage, and messaging.Design RESTful services within enterprise Azure environments.Implement integrations and extensions around Dynamics 365 CE and Dataverse.Develop middleware solutions connecting D365, Power Platform, and external systems.Integrate complex API landscapes within the Microsoft ecosystem.Contribute to building CI/CD pipelines using Azure DevOps or GitHub Actions.Ensure code quality through unit and integration testing.Collaborate on architecture, scalability, security, and performance considerations.You will work in multidisciplinary teams alongside solution architects, Power Platform consultants, and other senior developers.No silos.Significant impact.

Are you an experienced IT professional seeking the autonomy of a freelancer while enjoying the security of a permanent contract? Do you desire a paycheck that brings you joy each month? Furthermore, are you looking for flexibility and tailor-made solutions that align with your preferences and capabilities? If so, we encourage you to explore this vacancy and apply.About RedBlue IT ProfessionalsWe support leading organizations in the Netherlands, Germany, and Belgium with their IT projects by providing experienced specialists in SAP, Oracle, and enterprise Java.RedBlue merges the quality and commitment of senior professionals with the flexibility that organizations require to successfully execute projects and management tasks.The professionals at RedBlue are employed under a permanent contract and operate within the Midlance® model, which focuses on small-scale, personal collaboration, allowing them to share in revenue monthly.Your ColleaguesOur professionals possess a minimum of 7 to 10 years of experience in their field of expertise. Many have transitioned from larger consulting firms and contemplated independent entrepreneurship, but opted for a more personalized and intimate organization. Freelancers who miss collaboration also find a home at RedBlue.Midlance®To distinguish itself in the market, RedBlue introduced the Midlance® model in 2008, which encompasses our unique collaboration approach and compensation structure. This has since become a registered trademark of RedBlue, and any other use is a violation that misrepresents the true Midlance®.High EarningsThe Midlance® model is more than just a compensation structure; it significantly contributes to relatively high earnings for consultants. This is primarily achieved through low overhead costs and a highly efficient and experienced office team.PermanenceEmployees enjoy a permanent contract, akin to traditional consultancy firms. However, our collaboration is modern, equitable, and features a fair distribution of responsibilities and earnings.Base Salary and Monthly BonusYou will have a permanent employment agreement, where you can determine your base salary and earn a monthly bonus based on hours worked and the rate.BenefitsAlongside a relatively high monthly salary, you will enjoy many attractive fixed secondary benefits.

Elevate complex React environments to new heights.As a Senior Front-end Developer at Divotion, you will play a crucial role in guiding React projects. You will assist organizations with intricate front-end challenges, enhancing architecture, scalability, and code quality to meet enterprise standards.You will blend deep technical expertise with advisory skills, taking ownership in client environments where performance, maintainability, and long-term development are paramount.Your Responsibilities:Engage in strategic React projects for clients where scalability, performance, and stability are essential. You will serve as a technical sparring partner for both developers and stakeholders.Specifically, you will:Design and implement enterprise-grade React architectures.Establish and maintain front-end standards and design systems.Implement scalable state management solutions (Redux, Zustand, etc.).Advise on tooling, CI/CD, testing strategies, and performance optimization.Review code and mentor fellow developers.Collaborate with backend, UX, and DevOps at the architectural level.Actively contribute to knowledge sharing within Divotion (knowledge sessions, events).Qualifications:HBO+/WO work and thinking level.A minimum of 6 years of experience as a React Front-end Developer in complex environments.In-depth expertise in React (hooks, performance, architecture).Strong experience with TypeScript and component-based development.Familiarity with modern frameworks such as Next.js (preferred).Experience with testing frameworks (e.g., Jest, React Testing Library, Playwright, Vitest, Cypress).Experience with modern build and deployment pipelines.Affinity for cloud environments.Excellent communication skills and persuasive advisory capabilities.Fluent in Dutch.Benefits:Challenging React assignments with visible impact.Significant autonomy and influence over technical direction.Opportunities for deepening knowledge, coaching, and sharing.Personal soft-skills program with external guidance.Flexible employment terms (salary, mobility, leasing, tooling).A supportive community focused on craftsmanship.About DivotionDivotion is a specialized IT consultancy where dedicated professionals work passionately on solutions that truly function. We combine technical excellence with a human-centered approach, collaboratively building sustainable software and careers.Join DivotionWe welcome talent from diverse backgrounds and encourage everyone to apply, regardless of gender, background, or other characteristics.

Are you passionate about working as a Senior Java Developer in an environment that prioritizes growth, trust, and enjoyment? At Conflux, we invest not only in your career but also in you as an individual. You will have the freedom, trust, and ample opportunities to develop yourself through training, coaching, and engaging projects with leading clients.We believe in collaborative learning, sharing knowledge, and uplifting one another. You will become part of a close-knit, diverse community of specialists who thrive on teamwork, brainstorming, and mutual support. Conflux is a place where your ideas matter, where you can make your voice heard, and where you can grow in your unique way.At Conflux, sustainable growth is our focus: technically, personally, and at your own pace. You will work on impactful Java projects, sharpen your technical knowledge, and develop within a robust community that actively participates in national and international events and conferences.

Join us as a Mid-Level Front-End Developer at Garansys and embark on an exciting journey! Engage in Dynamic Projects: Every client and application is unique, ensuring that no two days are alike! Continuous Learning and Growth: Enhance your front-end skills, explore back-end development, or delve into the (Azure) cloud. Become Part of a Skilled Team: Collaborate, learn together, and assist others in their growth.As a Mid-Level Front-End Developer at Garansys, you will leverage your extensive experience with contemporary web technologies and your passion for continuous self-improvement. You will collaborate with other full-stack developers on a diverse range of products for various clients.You have innovative ideas for optimizing the front-end of our applications and can anticipate user needs. You are well-versed in selecting the appropriate tools and frameworks for new assignments and possess a solid understanding of modern front-end architectures. The best solution is never a one-size-fits-all; it depends on the client's specific needs and requirements.You excel in both the visual aspects of your role and the development of interfaces with external systems and their corresponding back-ends. You create applications that are visually appealing and accessible to everyone, with performance always in mind.If you have the ambition, there is ample opportunity for you to develop both horizontally and vertically. You can explore new front-end frameworks or enhance your skills in back-end development or (Azure) Cloud technologies.Maarten Botter - Application Developer & Azure Team Lead: Discussions with the client team are crucial for ensuring we build the best solution. Sometimes I ask the questions; other times, I provide answers. This keeps us sharp.What We Value:As an experienced front-end developer, you should have a minimum of three years of experience with HTML5, CSS3, JavaScript/TypeScript, and Angular. Additionally, you should hold a completed HBO degree in Computer Science, Open ICT, Software Development, or a related field. You are a true team player who enjoys sharing knowledge with junior staff. Staying updated with the latest advancements in the field excites you, and you aspire to develop expertise in other frameworks such as React or Blazor. Opportunities for advancement to a senior or architect position are available. We also appreciate experience with:

Strix is an international company with a diverse team of over 250 specialists based in Poland, Germany, and the Netherlands. Our organization offers the stability of a well-established company combined with the freedom to influence technological decisions and project directions.At Strix, we develop enterprise-level e-commerce solutions, creating fast, scalable, and innovative platforms that cater to millions of users each month. As a Platinum Shopware Partner and trusted collaborator of Magento and Shopify, we assist global brands in developing solutions that set new market standards.Your Role:Transform design models into pixel-perfect templates, implementing UI designs using HTML, CSS, and JavaScript.Create components and interactive elements utilizing Vue.js, Twig, and Bootstrap (or similar).Experience with e-commerce platforms like Magento and Shopware is a plus.Employ preprocessors such as LESS or SASS for styling.Propose improvements to UX/UI and optimize template performance.Participate in project planning, coordinate with clients, and attend meetings to understand requirements.Guide projects from inception to completion: setup → implementation → testing → deployment.

Join us as a Senior Backend Developer!Are you a skilled backend developer eager to make a significant impact in a rapidly growing and innovative organization? FinancialLease.nl is seeking a passionate Senior Backend Developer to strengthen our Digital Innovations team and contribute to building robust and scalable solutions!About UsAt FinancialLease.nl, we go beyond leasing; we create intelligent digital solutions that simplify complexity. Our Digital Innovations team plays a central role in developing scalable, secure, and user-friendly systems that support the entire organization. We work with a modern tech stack, including C#, ASP.NET Core, TypeScript, React, React Native, and Next.js.We believe in choosing the right tools for the right challenges and prioritize clean, maintainable, and scalable code over quick, temporary fixes. Our engineers are valued partners within the business, directly contributing to the success of our services.Your RoleAs a Senior Backend Developer, you will be responsible for the development and maintenance of our backend systems and APIs. You will collaborate closely with the engineering team to build new features, enhance performance, and ensure the quality of our codebase. This is a hands-on role where you will work across the entire backend stack and actively influence technical decisions.You will join a team that prioritizes quality and structure, striving for sustainable solutions that are well-founded from the ground up.

Join Learned, where we empower organizations to cultivate their workforce effectively. Our advanced HR platform revolutionizes traditional HR practices, placing performance, development, and feedback at the forefront. Trusted by hundreds of companies, from dynamic startups to established enterprises, our software is critical to their growth. As we continue to expand rapidly, we're on the lookout for a passionate Senior Full Stack Developer. If you aspire to grow into a lead role, this could be the perfect opportunity for you!Note: Applicants must already reside in the Netherlands and be able to work in our Utrecht office three days a week.Your Role – Making an ImpactAs a Senior Full Stack Developer, you will lead the design, development, and maintenance of our SaaS platform. Engage with the entire technology stack, creating user-friendly interfaces with React and robust APIs and back-end services using Node.js. Collaborate with product managers, UX designers, and fellow engineers to deliver features that delight our customers.In an average week, you will:Collaborate with product and design teams to define and craft new features that enhance user experience.Participate in four weekly sprints with your team.Write clean, scalable, and maintainable code using modern TypeScript, React, Node.js, and MongoDB.Design and implement efficient and secure REST APIs to power our platform.Lead technical design discussions and contribute to architectural decisions.Review code, mentor junior developers, and uphold high engineering standards.Enhance developer workflows, CI/CD processes, and automated testing.Own projects from planning through deployment, ensuring timely and high-quality delivery.

We are seeking an experienced Senior Color Development Chemist with a robust background in formulating and developing hair dyes, bleaches, and professional hair care products. In this pivotal role, you will lead projects, foster innovation, and collaborate with diverse teams to produce outstanding products.Key ResponsibilitiesDesign and refine formulations for hair dyes, bleaches, and professional hair care products to ensure optimal performance, safety, and compliance with industry standards.Oversee and direct color development projects from initial concept through to commercialization, ensuring high product quality and effectiveness.Investigate and evaluate new ingredients, technologies, and trends in hair color science to support innovation.Perform comprehensive patent searches to ensure freedom to operate and encourage formulation development innovation.Employ instrumental measurements and analytical techniques to assess and confirm product performance.Work collaboratively with cross-functional teams to align product development initiatives with organizational objectives.Provide technical guidance and mentorship to junior and mid-level team members, fostering their professional growth.Actively contribute to departmental success by proposing creative ideas and improvements.QualificationsMaster's degree in Chemistry, Cosmetic Science, or a related discipline.5-7 years of experience in formulating and developing hair dyes; experience with bleaches and technical products is advantageous.Demonstrated success in launching cosmetic products into the market.Strong leadership, communication, and project management abilities.Excellent verbal and written communication skills to effectively convey complex technical information to non-technical audiences.Strategic thinking and a proactive approach to driving product development innovation.

Building with clarity, results, and a healthy dose of realismAt CLB, we are seeking a Senior Project Manager for Real Estate Development who not only oversees projects but also realizes them with an eye for detail and the bigger picture. Our real estate division manages acquisition, realization, and management of new construction projects. You will focus on the realization phase—from the purchase agreement to delivery and the startup of the operational phase. This involves collaborating with developers and builders, managing time and budget, while ensuring quality. You are proficient in Dutch as our communication primarily occurs in this language.Key Responsibilities:You will begin your work after being briefed by the acquisition team about the project, ensuring you are well-acquainted with all the details of your project.Utilizing your negotiation skills, you will create solid purchase and contracting agreements that will be referenced in the future.Cost control and planning are not mere administrative tasks for you; they are essential management tools. You will maintain focused coordination with builders, developers, and internal colleagues on these matters.Together with the internal property manager, you will seek the optimal balance between return and relevance while not shying away from substantive discussions.During the realization phase, you will ensure a well-coordinated handover to Merel Vastgoedbeheer, enabling them to hit the ground running and efficiently serve tenants from day one.You will actively follow developments in real estate, construction, society, and regulations—not because you must, but because you want to understand them (even between the lines).

Are you an experienced IT professional looking for the freedom of an independent contractor, paired with the security of a permanent position? Do you want a paycheck that brings you joy every month? Are you seeking flexibility and tailored solutions that align with your needs and opportunities? If so, this vacancy is worth exploring.About RedBlue IT ProfessionalsWe support leading organizations in the Netherlands, Germany, and Belgium with their IT projects, providing skilled SAP, Oracle, and enterprise Java specialists.RedBlue combines the quality and commitment of our senior professionals with the flexibility that organizations need to successfully execute projects and management tasks.Our professionals are employed full-time and operate under the Midlance® model, which emphasizes small-scale, personalized collaboration while sharing in the revenue each month.Who Are Your Colleagues?Our professionals have a minimum of 7 to 10 years of experience in their fields. Many have previously worked at larger consulting firms and considered entrepreneurship but preferred a more intimate and personal organization. Freelancers who miss collaboration also find a home at RedBlue.Midlance®To differentiate itself in the market, RedBlue introduced its unique collaboration and compensation model, branded as Midlance® in 2008. This is now a registered trademark of RedBlue, and others using this name are infringing and misrepresenting the true Midlance® model.High EarningsMidlance® is more than just a compensation model; it significantly contributes to relatively high earnings for consultants, facilitated by low overhead costs and a highly efficient, experienced office team.Permanent EmploymentEmployees enjoy a permanent contract, similar to traditional consulting firms. However, our collaboration is more modern, equitable, and offers a fairer distribution of responsibilities and earnings.Base Salary and Monthly BonusYou will have a permanent contract and can choose your base salary, in addition to earning a monthly bonus based on hours worked and your rate.Additional BenefitsIn addition to a relatively high monthly salary, you will enjoy many attractive fixed secondary benefits.