Senior Data & Infrastructure Engineer - Freelance Opportunity

Elsenga, a family-owned company based in Hoofddorp, has built a strong reputation in electrical engineering and security since 1923. With around 50 colleagues, the team values personal connection and short lines of communication. Here, every team member contributes to reliable electrical and security solutions that have a real impact. Role overview The Project Leader in Electrical Engineering manages projects across North Holland and the Randstad region, from initial preparation through to delivery. This position carries significant responsibility and independence, with support from a collegial, professional team. The role involves coordinating all phases of electrical and security projects, ensuring high standards and efficient execution. What you will do Coordinate the design, execution, and delivery of projects Lead technicians and work preparers Monitor schedules, budgets, and quality standards Maintain contact with clients and partners Identify and document additional or reduced work Report on project progress and financial outcomes This role acts as the link between clients, technology, and project execution. Managing multiple projects at once, the Project Leader keeps a clear overview and works in a structured way. Requirements Higher professional education in electrical engineering Experience in installation technology (project leadership experience is an advantage) Strong organizational and planning abilities Clear, professional communication skills Sense of responsibility and decisiveness Living in the Hoofddorp region Technical insight, leadership, and a focus on results are essential. Reliability and a goal-oriented approach are valued in this position. Benefits Salary based on knowledge and experience Employment conditions according to the collective labor agreement and a solid pension plan 25 vacation days plus 13 ATV days (for full-time roles) High degree of independence in daily work and decision-making Opportunities for training and development Modern tools and systems for efficient work Supportive, professional team with short communication lines Access to VDKnaken benefits via the Alleo app (secondary employment conditions, benefits, and schemes) Bike leasing scheme with low additional tax Discounts on personal insurance (via Centraal Beheer) Corporate benefits with well-known brands

Concept Elektro specializes in electrical installations, security systems, and sustainable solutions for a wide range of clients in and around Hoofddorp. The team works on both new construction and renovation projects, serving businesses, municipalities, healthcare institutions, housing corporations, data centers, contractors, and private individuals. The company values collaboration and maintains a friendly, informal atmosphere. Role overview The Project Leader position carries significant responsibility and trust. This role involves organizing, directing, and monitoring technical projects from start to finish. Projects may include electrical installations and fire alarm systems in residential buildings, commercial properties, healthcare facilities, and schools. On-site work is central, with regular contact with clients, technicians, and other stakeholders to ensure agreements are met and project goals are achieved. What you will do Develop project plans and track progress throughout each phase Supervise technicians, work preparers, and subcontractors Safeguard quality, safety, and cost control measures Coordinate with clients, suppliers, and construction partners Identify and process changes in project scope (additional or reduced work) Ensure installations meet all applicable standards Deliver accurate technical documentation What we offer Competitive salary: €4,000 to €5,500 gross per month, depending on experience and education Training and development opportunities, including Project Certification 25 vacation days plus 13 ATV days (full-time) Opportunities to advance into operational roles within the organization Company phone, laptop or tablet, and car Flat organizational structure with short communication lines Informal, friendly work environment Self-directed work with variety and real responsibility Culture that values ownership and accountability Access to VDKnaken benefits via the Alleo app (secondary benefits, discounts, and arrangements) Leasing bicycle scheme with low additional tax Discounts on private insurance (via Centraal Beheer) Corporate discounts with well-known brands

Are you ready to strengthen our warehouse in Hoofddorp as a Team Leader? We are seeking an experienced Warehouse Team Leader who will take charge of our logistical operations at our Hoofddorp location!In this pivotal role, you will oversee daily warehouse processes, ensuring that our technicians can operate as efficiently as possible.You will be the central connection between the workshop, reception, and suppliers, adjusting processes as necessary to ensure smooth operations.Our ultimate goal remains paramount: customer satisfaction!You will report to the After Sales Manager and serve, along with your colleagues, as the main point of contact for all parts inquiries from the reception and workshop.Conducting progress checks and inventory counts will be a significant portion of your responsibilities.Additionally, you will be responsible for guiding and mentoring your warehouse colleagues.Other expected duties include:Identifying, documenting, and ordering parts to ensure efficient and timely delivery to the workshop;Managing the most optimal and efficient parts inventory;Overseeing the tire storage facility;Monitoring and enhancing warehouse administration and accompanying processes;Identifying opportunities for improvement in logistics and acting proactively;Assisting sales advisors in selling accessories.What do we require from you?You have completed an MBO-level education in automotive technology or a related field.

Are you a meticulous and organized project leader with experience in managing projects within multidisciplinary IT teams? Are you ambitious, environmentally aware, and capable of connecting teams? We are looking for a Project Manager IT to strengthen our team. Your Role: As an IT Project Manager, you will have the opportunity to make a direct impact by making informed decisions in an evolving IT landscape. You will also lead projects across various Scrum teams. Additionally, your responsibilities include: Developing plans, objectives, and timelines Guiding developers, testers, analysts, and other stakeholders to collaborate efficiently Creating and monitoring project budgets to keep costs under control and generate reports Identifying potential risks and obstacles and devising strategies to mitigate them Ensuring all project outcomes meet agreed quality standards and requirements About the Team: The Data & IT department forms the digital core of Hiltermann Lease. With a team of over 50 professionals across IT Operations, IT Data, and IT Development, we work on fine-tuning systems, data solutions, and customer-focused portals. We ensure a smoothly operating IT landscape and scalable technologies. Entrepreneurship plays a crucial role, from implementing new technologies to devising smart solutions that contribute to our growth and that of our clients. What We Seek: As an IT Project Manager, you bring structure to the team. You are the point of contact and project leader for ongoing projects in a constantly changing environment. Additionally, you have: A completed HBO or WO degree, preferably in an IT-related field

Join our innovative team at Delta Electronics as a Sales Coordinator specializing in Electric Vehicle Charging Solutions. In this on-site role based in Hoofddorp, you will play a pivotal part in supporting our sales operations, coordinating with clients, and ensuring seamless communication between departments. Your organizational skills and attention to detail will help drive our mission to provide sustainable energy solutions.

As a Project Manager specializing in Data Center Solutions, you will oversee key client projects, ensuring that all deliverables meet the defined scope and budget. This role requires direct collaboration with clients to effectively manage expectations and ensure satisfaction. You will coordinate efforts with Delta colleagues and local partners across the EMEA region to guarantee that every project aligns with client needs and industry standards.Key Responsibilities:Manage internal resources and external vendors for seamless project executionEnsure timely delivery of projects within the established scope and budgetDefine project scope and objectives while engaging relevant stakeholders to ensure technical feasibilityOversee resource availability and allocationCreate a detailed project plan to track and monitor progressManage changes to project scope, schedule, and costs using effective verification techniquesUtilize appropriate tools and techniques to measure project performanceProvide management with timely reports and escalate issues as necessaryFoster strong relationships with clients and all stakeholdersImplement risk management strategies to minimize project risksEstablish and maintain relationships with third-party vendorsGenerate and maintain comprehensive project documentationEngage with clients for detailed briefings and clarification of project requirementsMonitor project performance against short and long-term goalsAdapt project constraints based on financial analysis to meet budgetary objectivesDevelop project plans for client and staff disseminationPrepare status reports for upper managementContinuously enhance your leadership skills through training and conferencesDocument needs through spreadsheets, diagrams, and process mapsTravel for business as required by project demands

Concept Elektro delivers electrical installation services in Hoofddorp and the surrounding region. The company works with a range of clients, including municipalities, healthcare providers, housing corporations, data centers, contractors, and private individuals. Projects span both new construction and renovation, with a focus on electrical systems, security solutions, and sustainable technologies. Role overview The Electromechanical Technician position involves hands-on work across a variety of electrical and mechanical projects. Assignments may be completed independently or in collaboration with a team, depending on project needs. The work environment values teamwork and aims to create a positive atmosphere for all employees. Key responsibilities Participate in the design, installation, and maintenance of electrical systems and security solutions Work on projects for both business and individual clients, including new builds and renovations Handle fire alarm systems; training is available for those without prior experience in this area What to expect Projects are mainly based in and around Hoofddorp Opportunities to learn and develop new skills, especially related to fire alarm systems A collaborative team that values job satisfaction

Concept Elektro, based in Hoofddorp, delivers electrical installation services for businesses and private clients. The team designs, installs, and maintains electrical systems, security solutions, and sustainable technologies. Projects range from new construction to renovations and often involve working closely with municipalities, healthcare providers, housing corporations, data centers, contractors, and individual customers. Collaboration, clear communication, and a positive work culture are central to daily operations. What you will do Maintain and repair technical installations for a variety of clients Coordinate execution teams and communicate with subcontractors Create and monitor schedules, project plans, and budgets Keep clients informed about progress and the quality of work Serve as a technical resource for complex security systems Independently resolve technical issues and malfunctions Work with significant autonomy and enjoy a varied workday What you bring Background in electrical engineering or strong technical experience Motivation to learn and tackle new challenges Flexible, customer-focused, and skilled at problem-solving Valid driver's license B and living in the Hoofddorp region Willingness to participate in on-call rotations VCA diploma is an advantage Ability to work independently and manage multiple projects Benefits Competitive salary with 25 vacation days and 13 ATV days Company vehicle equipped with professional tools Mobile phone, tablet, and/or laptop for personal use Flat organizational structure with short communication lines Opportunities for further training and career growth, including roles in project preparation Diverse tasks and a high degree of independence Access to perks via the VDKnaken app, bicycle lease scheme, insurance discounts, and other corporate benefits Friday afternoon gatherings, pool and ping pong tables, and an annual family event hosted by VDK

Concept Elektro, based in Hoofddorp, delivers electrical installation services for both business and private clients. The team handles the design, installation, and maintenance of electrical systems, security solutions, and sustainable technologies. Clients include companies, municipalities, healthcare institutions, housing corporations, data centers, contractors, and individuals. Projects range from new construction to renovations, with a strong emphasis on teamwork and enjoying the work process. Role overview The Service Coordinator plays a central role in connecting clients, technicians, and colleagues. This position ensures that service and maintenance activities are well organized and that communication flows smoothly between all parties. The work is primarily office-based in Hoofddorp, with daily interaction with technicians, clients, suppliers, and occasionally certifying bodies. The focus is on maintaining structure, clarity, and high client satisfaction. What you will do Schedule and direct service technicians Receive, register, and follow up on service requests Monitor maintenance, inspections, and certification timelines Review work orders and handle administrative processes Communicate with clients about scheduling, testing, and progress updates Apply relevant standards such as NEN1010, NEN3140, NEN2535, NEN2575, and CCV Manage documentation, logs, and test reports within the systems What we offer A key role linking clients, technicians, and internal teams Competitive salary: €3,500 to €5,500 gross per month, depending on experience and education Extensive training options, including Projecting Specialist qualifications and process management diplomas Opportunities to grow into team leader or specialized contract management positions Regular team outings and Friday afternoon gatherings at the renovated Hoofddorp office 25 vacation days plus 13 ATV (additional leave) days for full-time staff Company phone, laptop or tablet, and vehicle as needed Access to VDKnaken benefits via the Alleo app, including secondary employment benefits, discounts on private insurance through Centraal Beheer, and offers from well-known brands

Join Delta Electronics as a Technical Product Specialist focused on our innovative Busway solutions. In this pivotal role, you will be responsible for providing exceptional technical support and expertise to our clients, ensuring that they receive the highest quality service. Your insights will be vital in influencing product development and enhancement, directly contributing to our mission of delivering cutting-edge solutions to the market.

Cloud Infrastructure EngineerAs a Cloud Infrastructure Engineer at Hiltermann Lease, you will play a pivotal role in designing, building, and evolving a sustainable cloud environment. Your focus extends beyond just Azure; you will ensure that our infrastructure remains scalable, secure, and flexible. If you're looking to work in a rapidly growing fintech organization where you have the freedom to make an impact, we would love to welcome you to Hiltermann Lease!What Will You Do?In your role as Cloud Infrastructure Engineer, you will take the lead in managing and enhancing our cloud infrastructure. You will not only work within Azure but will also explore broader strategies to minimize dependencies and future-proof our platforms. Your responsibilities will encompass both the current environment and its evolution towards modern standards. A critical aspect of your role will involve standardizing monitoring and observability, creating reusable templates, and facilitating migrations from legacy systems to cloud-native solutions. You will collaborate closely with development teams, IT Operations, and the IT Security Officer, serving as the technical point of contact for complex issues and incidents. Your key responsibilities include:Designing and developing the cloud architectureManaging and optimizing the Azure infrastructure (Azure Next)Implementing and managing Infrastructure as Code (Bicep and Terraform)Setting up and enhancing monitoring, logging, and observability (including Elastic Cloud, Kibana, and OpenTelemetry)Automating deployments via CI/CD pipelines (Azure DevOps and Azure DevOps Pipelines)Supporting migrations and modernization of legacy environmentsWhat Are We Looking For?You are an experienced and independent engineer with a strong DevOps mindset. You take ownership and feel responsible for the stability and future of the infrastructure. You think in solutions, work methodically, and are able to simplify complex technical challenges into practical implementations. You communicate easily with various stakeholders and actively contribute to improvements within the platform. Additionally, you bring the following:A minimum of HBO work and thinking level and approximately 7+ years of experience in a cloud or infrastructure roleProven experience with Azure and Infrastructure as Code (Bicep and/or Terraform)Experience with CI/CD and pipelines within Azure DevOps and working with Git/version control

Are you skilled at juggling multiple tasks at once, enjoy coaching and guiding colleagues, and are not afraid to roll up your sleeves? If so, we are looking for you! Your primary focus will be to deliver outstanding performance for our customers while thinking in terms of solutions. You will maintain clear and concise communication with your team and regional manager. As our organization continues to grow, you will grow with us.A Day in the Life of a Store ManagerYou start your day early, brewing coffee as your team members arrive. Together, you discuss the day's agenda. You handle various administrative tasks and create an effective daily plan. You ensure your colleague conducts a quick check to ensure the store is tidy before you open the doors with a smile. When new shipments arrive, the team works together for swift processing. As the driving force of the team, you motivate and ensure efficient planning throughout the day. Once the shelves are stocked and appealing, you focus on the development of your team members, manage administrative tasks, select candidates for interviews, and welcome the regional manager to discuss various challenges in the store. Your motivation leads you to present several improvement suggestions so that together, you can maximize the potential of this beautiful store.

Are you a quality-focused professional with a passion for delivering robust and reliable solutions? Do you thrive in a dynamic environment where attention to detail and continuous improvement are paramount? At Hiltermann Lease, we are seeking a Quality Assurance Engineer to join our cross-functional Agile team and ensure the quality of our Salesforce-based CRM platform.Your Role:As a QA Engineer, you will play a vital role in guaranteeing the quality of our software solutions. You will be responsible for planning, designing, and executing manual tests, with a strong emphasis on CRM-related functionalities. Collaborating closely with developers, product owners, and business stakeholders, you will identify issues early and ensure a smooth, reliable user experience.What We Are Looking For:As a QA Engineer, you ensure that quality is never an afterthought. You know how to thoroughly test software, identify issues early, and contribute to a reliable and user-friendly solution. You combine knowledge of testing methodologies and CRM environments with a keen eye for detail and a structured working style. Additionally, you possess:Demonstrable experience with manual testing, preferably in Salesforce or similar CRM systems.Practical knowledge of API testing (Postman, Swagger) and frontend testing principles.Analytical skills and a meticulous approach to work.Strong communication skills and the ability to collaborate within an Agile team.Fluency in Dutch, both spoken and written.Nice-to-haves include knowledge of test automation (e.g., Playwright), CI/CD pipelines (Azure DevOps), and programming languages like C#.

At devleaps, a premier boutique consulting firm, we specialize in driving transformative change through Data, AI, and Technology. Our mission is to empower organizations to harness the full potential of their data by crafting and deploying state-of-the-art data platforms, sophisticated analytics solutions, and AI-enhanced capabilities, all while ensuring robust Data Governance.Our dedicated team collaborates closely with clients to tackle intricate data challenges, construct scalable architectures, and foster data-driven decision-making. By marrying deep engineering expertise with keen business insight, we deliver tangible and impactful solutions.The RoleAs a Senior Data Engineer, you will be instrumental in designing and developing cutting-edge data platforms and analytics infrastructures for our clients. Collaborating with data platform engineers, analytics specialists, and infrastructure experts, you will create scalable data pipelines, reliable data models, and high-quality data products.You will not be confined to a ticket queue; instead, you will have the opportunity to influence architectural decisions, advise clients on platform strategies, and convert ambiguous business requirements into precise technical solutions.

Concept Elektro delivers electrical installations, security solutions, and sustainable systems for a wide range of clients in Hoofddorp and the surrounding area. Projects cover both new construction and renovations for corporations, municipalities, healthcare providers, housing associations, data centers, contractors, and private homeowners. The team values collaboration and a positive work atmosphere. Role overview The Fire Alarm Systems Technician manages projects independently from start to finish. This role involves working directly with clients such as businesses, healthcare facilities, municipalities, housing corporations, and contractors throughout the Haarlemmermeer region. What you will do Oversee the design, installation, and maintenance of fire alarm systems for various types of properties Work independently on assigned projects, ensuring timely and thorough completion Collaborate with clients and colleagues to deliver effective solutions Gain experience with related security technologies, including camera systems and access control Work environment Concept Elektro emphasizes teamwork and a supportive workplace, encouraging collaboration across all project stages.

At DEVLEAPS, we empower teams to deliver superior software solutions with minimal friction. We are on the lookout for a Technical Lead – Engineering Excellence who excels at the convergence of hands-on technical leadership and strategic consultancy. This individual should be adept at making architectural decisions, collaborating with engineers, and engaging with Product Managers to synthesize complex information effectively.Key Responsibilities:Guide Technical Direction: Take ownership of architectural decisions, establish engineering standards, and ensure robust solutions across Kubernetes/AKS, event streaming, CI/CD, security, and AI/ML platforms.Act as a Trusted Advisor: Engage with clients to challenge assumptions, shape development roadmaps, and assist senior stakeholders in understanding trade-offs without overwhelming them with technical jargon.Technical Mentorship: Embed within client teams to guide engineers through design and implementation, elevate the quality of work through code reviews, pairing, and structured feedback.Drive Modernization Efforts: Lead migrations from on-premises, monolithic, and ESB architectures to microservices and event-driven models with a clear implementation plan.Own the Technical Narrative: Facilitate architecture reviews, conduct engineering workshops, and distill complex system challenges into actionable insights.Identify and Eliminate Bottlenecks: Recognize systemic issues within tooling, processes, or architecture, and collaborate with client leadership to mitigate these challenges.

What Will You DoAre you a Technical Specialist with the ability to diagnose and resolve complex issues? At a-point, as a Technical Specialist / High Voltage Expert, you are the essential link ensuring that our vehicles are road-ready. Your focus will be on our Volkswagen Commercial Vehicles, playing a pivotal role in the maintenance and repair of both traditional and electric vehicles.In your role as Technical Specialist / HVE, you will engage in a variety of challenging tasks where your expertise is vital. This includes:Conducting maintenance, particularly on electric vehicles;Investigating and resolving complex electronic issues;Coordinating with the importer and colleagues on appropriate repair methods;Accurately documenting completed work; At a-point, you will work in a modern workshop and be part of a team of dedicated professionals. Together, you will contribute to innovative vehicles and stay updated on the latest advancements in automotive technology, especially in electric mobility. Your knowledge of cutting-edge technologies and attention to detail will ensure that every vehicle is perfectly prepared for the road. What We Expect From YouYou are a passionate automotive technician with a keen interest in cars and technology. Electric vehicles particularly pique your interest, and you keep abreast of all developments in the field. You possess a flexible mindset and are a team player who collaborates effectively to achieve the best results. Furthermore, you have:A completed education as a first automotive technician;A started or completed education as a Technical Specialist and/or High Voltage Expert (HVE);A valid driver's license B;Proficient command of the Dutch language;If you have an APK license, it is definitely an advantage. What We OfferAt a-point, hard work is rewarded. Therefore, as a Technical Specialist and/or HVE, based on a 38-hour workweek, you will receive:A competitive gross monthly salary based on your experience and education;ADV allowance for a 40-hour workweek;8% holiday pay;Good secondary employment conditions;192 vacation hours based on full-time employment, with the option to purchase extra days;Extensive training and growth opportunities;

Join our dynamic team as a Field Application Engineer in our Hoofddorp office, specializing in cutting-edge liquid-cooling solutions. Your role will be pivotal in ensuring customer-facing technical success, guiding our innovative products from initial qualification to large-scale deployment. You will take the lead in design-in processes, validation, and provide on-site support while collaborating closely with Sales, Engineering, Quality, Operations, and Manufacturing teams.Key Responsibilities:Project Leadership: Strategically plan and track milestones, manage risks, and drive cross-functional execution from design-in to production.Customer Technical Engagement: Gather requirements, navigate trade-offs, ensure specifications are met, and provide architectural support.Validation & Quality Assurance: Develop and execute comprehensive test plans (pressure, leak, flow, thermal, vibration); document findings and resolve issues.On-site Technical Support: Prioritize and optimize performance at customer data centers and facilities.RMA Management: Provide initial response, conduct on-site fault isolation, coordinate failure analysis with the factory, and implement corrective actions.Manufacturing and Process Collaboration: Possess a solid understanding of liquid-cooling manufacturing processes (brazing, welding, testing) and work hand-in-hand with the manufacturing team to maintain quality and output.Market & Roadmap Input: Transform customer insights and market trends into product requirements and quality objectives.