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Collective.work

Collective.work

collective.work

147 Jobs

18 Employees

About the Company

Une plateforme, deux volets : 1) un volet recruteur, la MegaSearch, pour sourcer, contacter et recruter sans commission les 500,000 freelances de Collective (vive l'IA !). => Par ici pour avoir une démo de l'interface Recruteur : https://calendly.com/juliette-collective-work/demo-collective-work-clone 2) un volet freelance pour se rendre visible et joinable des recruteurs, développer son réseau, et se professionnaliser via des outils de gestion. Faites comme 2,500 ESN, entreprises, cabinets et agences (Theodo, Artefact, Cherrypick, OnePoint, Le Hibou, Freelance.com,…) publiez - sans commission - vos besoins freelance sur Collective !

Listed Jobs

Company background Company brand
Company Name
Collective.work
Job Title
Tech Lead Java/IBM Cloud - Freelance
Job Description
Job title: Tech Lead Java/IBM Cloud Role Summary: Senior Java/IBM Cloud expert providing technical leadership, mentoring, and stakeholder engagement to drive application development, maintenance, and IT4IT project delivery across technical teams. Bridges technical and business stakeholders while ensuring architectural, security, and DevOps compliance. Expectations: Minimum 10 years software engineering experience. Mandatory IBM Cloud (dMZR), Java/J2EE proficiency. Proven leadership in technical standards adoption and prior IBM Cloud experience in a BNP entity. Fluency in English and one local language (Dutch/French). Key Responsibilities: - Design and implement technical solutions aligned with architecture, security, and infrastructure standards. - Define, document, and enforce development best practices across teams. - Mentor developers, conduct external code reviews, and provide expert guidance on Java, IBM Cloud, and DevOps. - Ensure project delivery meets quality, performance, and security goals while managing risks and dependencies. - Collaborate with architecture, infrastructure, and security stakeholder teams. - Participate in coding, design, and testing to validate guideline practicality. Required Skills: - Mandatory: IBM Cloud (dMZR), Java, J2EE; 10+ years software engineering; UML, architecture, SDLC; security-first mindset; DevOps; prior IBM Cloud experience in BNP; leadership, communication, problem-solving. - Preferred: Spring Cloud, Opentext Extstream; financial services/Personal Finance domain experience. - Languages: English mandatory, Dutch/French required. Required Education & Certifications: Not specified.
Brussels, Belgium
Hybrid
Senior
10-09-2025
Company background Company brand
Company Name
Collective.work
Job Title
Dataiku Expert / Data engineer - Freelance
Job Description
**Job title** Dataiku Expert / Data Engineer – Freelance **Role Summary** Reconstruct and optimize critical data pipelines originally built in SAS, migrating them to an AWS stack that combines Databricks for computation and Dataiku for low‑code transformations. Deliver high‑quality, cost‑effective data services while enabling knowledge transfer to internal teams. **Expectations** - Deliver fully functional, performance‑tuned pipelines. - Maintain data integrity from ingestion to availability for business users. - Enable seamless transition to autonomous operation for the client’s teams. **Key Responsibilities** 1. Design and implement complex data transformation workflows in Dataiku, prioritizing visual recipes and best‑practice node structuring. 2. Integrate Databricks clusters to accelerate processing and reduce run‑time costs. 3. Validate data at each transformation stage and ensure traceability and auditability. 4. Train technical and business stakeholders on the new tooling and processes to support ongoing maintenance. **Required Skills** - Advanced proficiency in Dataiku (visual recipes, plugin development, large‑scale workflow management). - Strong SQL expertise and solid Python programming for custom logic. - Experience with Databricks (distributed computing concepts, integration into ETL pipelines). - Background in modern data‑warehousing projects. - Excellent communication for cross‑functional collaboration. - Fluent in French or Dutch; professional English required. **Required Education & Certifications** - Bachelor or higher in Computer Science, Mathematics, Engineering, or related discipline. - Minimum 5 years experience with SQL/SAS and data projects. - Minimum 2 years hands‑on experience with Dataiku. - Dataiku Developer certification highly preferred.
Brussels, Belgium
Hybrid
11-09-2025
Company background Company brand
Company Name
Collective.work
Job Title
Blockchain Developer / Finance de marché & Tokenisation - Freelance
Job Description
**Job Title** Blockchain Developer – Market Finance & Tokenisation (Freelance) **Role Summary** Design, develop and maintain blockchain solutions for market finance and asset tokenisation, including smart contracts for bonds, debt instruments, structured products, and institutional stablecoins. Collaborate across product, IT, and compliance teams to ensure regulatory compliance, cross‑chain interoperability, and robust security. **Expectations** - Deliver high‑quality, secure smart contracts in Solidity, Rust, or Go. - Participate in the architecture and deployment of institutional stablecoins (EURSV, EURCV, Circle). - Lead security audits, testing, and technical documentation. - Work effectively within a regulated banking environment, meeting strict compliance and audit requirements. - Provide clear communication with stakeholders across market, IT, and compliance functions. **Key Responsibilities** - Develop, test, and deploy smart contracts for financial assets (bonds, debt securities, structured products). - Design and implement cross‑chain bridges and interoperability solutions. - Integrate stablecoin solutions (EURSV, EURCV, Circle) into existing infrastructure. - Perform security audits, unit and integration testing, and produce detailed technical documentation. - Collaborate with market teams, IT, and compliance to ensure product robustness and regulatory alignment. - Stay current on blockchain standards (ERC‑20, ERC‑1400, ERC‑4626) and best practices. **Required Skills** - 5+ years of software development experience, including 2–3 years in blockchain. - Proficiency in Solidity (Hardhat/Foundry) and Rust or Go. - Deep understanding of ERC protocols (ERC‑20, ERC‑1400, ERC‑4626). - Experience with institutional stablecoins and tokenisation of financial assets. - Knowledge of cross‑chain bridge architectures and secure integration patterns. - Strong analytical, detail‑oriented mindset and ability to operate in regulated environments. - Excellent communication skills in English; French is a plus. **Required Education & Certifications** - Bachelor’s degree (or higher) in Computer Science, Finance, or related field. - Relevant certifications (e.g., Certified Blockchain Developer, SEC‑related finance qualifications) are a plus but not mandatory.
France
Remote
18-09-2025
Company background Company brand
Company Name
Collective.work
Job Title
Senior Developer Back-end NestJS - Freelance
Job Description
Job title: Senior Back‑End Developer (NestJS) – Freelance Role Summary: Design, implement, and maintain scalable, high‑performance backend APIs with NestJS in a cloud‑native environment. Drive architecture decisions, oversee AWS infrastructure, and collaborate closely with product teams to translate business requirements into robust technical solutions. Expectations: 3–6 month freelance assignment with potential transition to permanent role; hybrid or remote work. Key Responsibilities: • Architect and develop RESTful/GraphQL APIs using NestJS, TypeScript, and SOLID principles. • Build and manage scalable, cloud‑based infrastructure on AWS; optimize performance and handle scaling. • Collaborate with Product Managers and Designers to translate functional specifications into technical designs. • Mentor junior developers, disseminate best practices, and uphold code quality through automated tests and continuous integration. • Implement monitoring, logging, and alerting; analyze metrics to optimize response times and reliability. • Ensure security compliance: authentication, authorization, and secure coding practices. • Produce and maintain technical documentation, API specs, and deployment guides. • Conduct ongoing research on NestJS, Node.js, and AWS services to recommend innovations and process improvements. Required Skills: • Advanced NestJS and TypeScript proficiency. • Extensive experience with Node.js frameworks and modern development practices. • Deep understanding of AWS services (EC2, Lambda, API Gateway, RDS, DynamoDB, ECS/EKS). • Expertise in relational (PostgreSQL, MySQL) and NoSQL (MongoDB, DynamoDB) databases. • Proven ability to design microservices and scalable architectures. • Strong knowledge of SOLID, design patterns, automated testing, CI/CD, and DevOps tooling. • Excellent communication, product orientation, problem‑solving, autonomy, and teamwork. • Continuous learning mindset and technology scouting. Required Education & Certifications: • Bachelor’s degree in Computer Science, Software Engineering, or related field. • Minimum 5 years of professional back‑end development experience, including 2+ years with NestJS and AWS.
France
Remote
Senior
26-09-2025