We are looking for a 5 Senior Java Backend Developers / Integration Engineers to strengthen the team working in pharma sector, a strategic integration platform in the healthcare ecosystem. This role is ideal for someone who enjoys building reliable backend services, secure APIs, event-driven integrations, and cloud-connected data flows in a modern Java environment.

Mission
You will join a team responsible for the evolution of the solution, a multi-module platform built around integration, interoperability, security, and data exchange.

Your work will include:

• Designing and implementing backend features in a modern Java stack
• Building and maintaining secure APIs and gateway flows
• Developing integrations with external systems and healthcare partners
• Working on event-driven communication and asynchronous processing
• Contributing to data persistence, migration, and operational reliability
• Supporting cloud-based data exchange patterns and AWS-connected services
• Ensuring code quality through unit and integration testing
• Collaborating closely with analysts, architects, and product stakeholders

Tech Environment
The current stack includes:

• Java 25
• Spring Boot 4
• Spring Cloud Gateway
• Spring WebFlux
• Spring Security
• Spring Data JPA
• MariaDB
• Flyway
• Apache Kafka / Spring Kafka
• Redis
• JWT / OAuth2 Resource Server
• AWS SDK with S3, Glue, Athena
• OpenAPI / Springdoc
• Jackson
• Parquet / Hadoop
• Maven
• JUnit 5 / Mockito

Your Profile
We are looking for someone with:

• Strong experience in backend development with Java and Spring
• Solid knowledge of API design, security, and system integration
• Experience with relational databases such as MariaDB or MySQL
• Experience with messaging platforms such as Kafka
• Familiarity with cloud environments, ideally AWS
• Good understanding of authentication and authorization mechanisms such as JWT and OAuth2
• A quality-driven mindset with attention to testing, maintainability, and production reliability
• The ability to work autonomously while collaborating effectively with a broader team

Nice to Have

• Experience with Spring Cloud Gateway or API gateway patterns
• Experience with Redis
• Exposure to healthcare, interoperability, or regulated environments
• Experience with data pipelines or analytical storage flows using S3 / Athena / Glue
• Familiarity with hexagonal architecture or domain-driven design principles

Why Join

• Strategic project with real business and integration impact
• Modern Java and Spring ecosystem
• Combination of backend engineering, integration, security, and cloud topics
• Collaborative team environment
• Opportunity to contribute to a platform used in a sensitive and meaningful domain

Practical Information

• Start date: ASAP
• Location: Belgium / hybrid possible
• Engagement: freelance or employee, depending on profile
• Duration: long-term reinforcement for the team

Call to Action
Interested in joining the team ?
Let’s connect and discuss the role, context, and expectations.

FREELANCE WANTED FOR MISSIONS

Within a public sector organization, you will join a team of 10 developers to analyze and build a strategic application that integrates contributions from more than 15 partners.

DESCRIPTION & RESPONSIBILITY

You will work within the client’s ICT department, contributing to the company’s digital transformation by helping to build applications for citizens and customers.

As Technical Team Member, we except the following skills: 

• ● Ansible
  ● Tomcat / SpringBoot
  ● Jenkins
  ● Kafka
  ● Alfresco
  ● Openshift
  ● H2
  ● Docker
  ● WSO2
  ● HA Proxy
  ● Service Registry (Eureka)
  ● Istio (Routing)
  ● Postgres17 + Version Spatiale
  ● Hibernate 5
  ● Drools Rules
  ● Liquibase
  ● Maven
  ● SAML
  ● Activiti (bpmn, workflow)
  ● Spring 5/6 (CORE, TX, MVC, JPA, Mvc, Feign, AOP, RS, IOC, Boot, Cloud Suite, Scheduler)
  ● Lombok
  ● Openlayers (maps)
  ● Slf4j (Logstash)
  ● Mockito
  ● Dozer
  ● Junit5
  ● JSF2
  ● Angular (most recent version)
  ● Primefaces 11 <
  ● Selenium
  ● Webservices: REST and SOAP
  ● Microservices: Graphql
  ● Javascript
  ● TypeScript
  ● Java 25
  ● JSON
  ● XML
  ● YAML
  ● CQRS
  ● Patterns: Strategy, Facade…
  ● ServiceNow
  ● Sonarcube
  ● Jira
  ● Confluence
  ● Git
• You have fluent knowledge of  (French or Dutch) and English.

Role

• Application Architect

Technical Skills

• Angular
• CI/CD automation (GIT, Jenkins)
• JEE
• JMS
• JPA
• Keycloak
• OAuth 2.0
• REST
• Springboot
• Hexagonal Architecture

Who you are

• You already have several years of experience in an IT position, preferably as a fullstack developer
• You have a technical background and are willing to learn the technical set-up of cleanroom production equipment automation.
• You can work independently and in a team. With your no-nonsense attitude, you coordinate with the team to get the job done.
• Your strong analytic and problem-solving skills enable you to interpret customer requirements and issues.
• You have strong communication skills, allowing you to build good relationships with stakeholders from different business units and the development partner.
• You are persistent and take initiative when needed.
• You have fluent knowledge of both (Dutch or French) and English.
• You feel comfortable in a complex and demanding environment.

Rate

• Market Price

Duration

• 12 months (renewable)

Request description

RESPONSIBILITY

You will be working in the client’s ICT department in the MES team.

You will participate in the automation trajectory and in installing software solutions for the MES application.

As MES Functional Analyst:

• You will Focus on analyzing new features for our MES application
• You will be involved during onboarding new cleanroom equipment and integration with MES
• You will translate the business requirements into valuable user stories in Azure DevOps.
• You will build up a network with the business and our development partner.
• You will prepare and coordinate tests together with the development partner and the owners from the Fab business unit.
• You will report the progress and results of deliverables & suggest appropriate actions in report out meetings with the business.
• You will support change management actions (communication, training, go live support).
• You will work in an Agile way which means deliver quickly through different iterations (sprints) and increments.
• You will work in a cross-functional team that effectively works together towards a solution, bringing in all the expertise needed from all stakeholders: MES team, Fab business unit, tool suppliers, ICT network team, development partner.

Who you are

• You already have several years of experience in an IT position, preferably as a functional analyst, system architect, business analyst or a similar position in a production environment, preferably (semiconductor) MES implementations. Your background allows you to quickly familiarize yourself with this business and IT processes.
• You have a technical background and are willing to learn the technical set-up of cleanroom production equipment automation.
• You can work independently and in a team. With your no-nonsense attitude, you coordinate with the team to get the job done.
• Your strong analytic and problem-solving skills enable you to interpret customer requirements and issues.
• You have strong communication skills, allowing you to build good relationships with stakeholders from different business units and the development partner.
• You are persistent and take initiative when needed.
• You have fluent knowledge of both Dutch and English.
• You feel comfortable in a complex and demanding environment.

Rate

• Market Price

Duration

• 12 months (renewable)

FREELANCE AI ENGINEER WANTED FOR MISSIONS

You will develop and implement AI solutions. You will be responsible for designing, developing, and deploying AI models/agents, as well as conducting impact analysis and documenting AI architectures.

DESCRIPTION & RESPONSIBILITY

You will be working in the client’s ICT department. You will participate in the digitalization of the company, supporting the build of citizen or customer AI applications. As an AI Engineer:

• Develop and implement AI models.
• Conduct impact analysis of AI solution integrations.
• Document AI architectures.
• Collaborate with cross-functional teams to ensure the successful implementation of AI solutions.

SKILLS & EXPERIENCE REQUIRED

• More than 12 years of experience in an IT position, preferably as an AI engineer, data scientist, or similar role. (Data Management)
• Strong technical background in artificial intelligence, machine learning, and data processing.
• Experience with AI frameworks such as TensorFlow, PyTorch, or Keras (+AI Agent)
• Ability to work independently or in a team.
• Strong analytic and problem-solving skills.
• Excellent communication skills.
• Persistent and proactive.
• Fluent in English and (Dutch or French).

Request description

RATE => Market Price

DURATION => 12 months (renewable)

MISSION

Our client performs world-leading research in nano-electronics. They leverage its scientific knowledge with the innovative power of its global partnerships in ICT, healthcare, and energy. Imec delivers industry-relevant technology solutions. In a unique high-tech environment, its international top talent is committed to providing the building blocks for a better life in a sustainable society. Imec is headquartered in Leuven (Belgium) and has offices in the Netherlands, Taiwan, US, China, Japan and India. Its staff of more than 5000 people from over 95 nationalities includes over 750 industrial residents and guest researchers.

RESPONSIBILITY

You will be working in the client’s ICT department in the MES team.

You will participate in the automation trajectory and in installing software solutions for the MES application.

As MES Functional Analyst:

• You will Focus on analyzing new features for our MES application
• You will be involved during onboarding new cleanroom equipment and integration with MES
• You will translate the business requirements into valuable user stories in Azure DevOps.
• You will build up a network with the business and our development partner.
• You will prepare and coordinate tests together with the development partner and the owners from the Fab business unit.
• You will report the progress and results of deliverables & suggest appropriate actions in report out meetings with the business.
• You will support change management actions (communication, training, go live support).
• You will work in an Agile way which means deliver quickly through different iterations (sprints) and increments.
• You will work in a cross-functional team that effectively works together towards a solution, bringing in all the expertise needed from all stakeholders: MES team, Fab business unit, tool suppliers, ICT network team, development partner.

Who you are

• You already have several years of experience in an IT position, preferably as a functional analyst, system architect, business analyst or a similar position in a production environment, preferably (semiconductor) MES implementations. Your background allows you to quickly familiarize yourself with this business and IT processes.
• You have a technical background and are willing to learn the technical set-up of cleanroom production equipment automation.
• You can work independently and in a team. With your no-nonsense attitude, you coordinate with the team to get the job done.
• Your strong analytic and problem-solving skills enable you to interpret customer requirements and issues.
• You have strong communication skills, allowing you to build good relationships with stakeholders from different imec business units and the development partner.
• You are persistent and take initiative when needed.
• You have fluent knowledge of both Dutch and English.
• You feel comfortable in a complex and demanding environment.

Mission : Evolution of existing application to new IA technologies (cvweaver.com) + Move Spring Thymeleaf to Angular or React

Context :

• Location : Full Remote
• Apply : job@hive-x.com
• Startdate : 01/03/2025 (3 months + 3 months extension)

Mission : Development of a Backend integrated to LAOS WEB3 Blockchain

Context :

• Location : Full Remote
• Apply : job@hive-x.com
• Startdate : 01/03/2025 (3 months + 3 months extension)

Request description

RATE => 530

DURATION => 12 months (renewable)

MISSION

Our client is a world leader in precision guided rocket system for helicopters and jet aircraft. In order to meet its ambitious production and product development roadmap, The client wants to reinforce its technical team and is looking for an engineer who wants to develop himself as an embedded software engineer. As an Embedded Software Engineer, you will integrate a multidisciplinary team of development within the Engineering department. You will be required, in the context of on firing systems or smart ammunitions, to specify, design, develop, validate and test embedded software. You will have the opportunity to work with innovated systems and tools in a high-tech environment. You will be expected to support multiple projects and as such will require planning and organizing skills.

RESPONSIBILITY

• Based on upper system specifications, define a software solution: GUI, back-end and tools.

• Write low- and high-level software requirements using dedicated tools and ensure traceability between requirements

• Develop software in Python or C/C++ on microprocessor, bare metal or Linux RTOS architecture

• Understand and solve the constraints of real-time applications, low/high level communications, multithread management, memory concurrency, etc.

• Collaborate with hardware engineer to develop abstraction layer of the hardware

• Use configuration managements tools (GIT, BitBucket, Jenkins, SonarQube)

• Ensure code quality by checking code coverage and verify the software using unit testing procedure

•Debug low level software using oscilloscopes

• Collaborate with V&V and DevOps team to setup a continuous integration system

• Write Software Description Documents to capitalize knowledges

• Participate to internal project reviews within the company, and external reviews with the customers

PROFILE

• You graduated with a Master’s Degree in Software or Electronic Engineer with 3 to 10 years of experience

• You are developer GUI and back-end in Python language, C/C++ languages as a plus

• You understand the challenges of embedding real time solution in micro-controllers.

• You have an experience in development of GUI, multiprocessor applications and communication systems (CAN, UART, SPI, I2C, Ethernet TCP-IP and Phy, MIL-STD-1553/1760, ARINC429 …)

•You have practical experience with following libraries/framework: pip, tkinter, pyserial, pillow, crcmod, matplotlib, openpyxl, numpy, fonttools, … • You are a good communicator, you can show pedagogy to support other developers • You are self-motivated and like to take initiatives • You are able to work with Agile culture

• You like following the latest trends in innovation

• An experience in aeronautical, spatial, defense or automotive industry, as well as a knowledge of the standards DO-178, ARP4754 or ISO26262, is a plus.

• English and French (spoken and written)