Customer Success Engineer

3E· SynaptiQ Operations
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📍 Brussels, Brussels, BelgiumFull time

About this role

As a Customer Success Engineer, you will play a pivotal role in managing the end-to-end customer journey. Your responsibilities will range from overseeing the onboarding of new clients to managing the ongoing success of mature accounts. This role demands a proactive approach to account management, issue detection, and continuous platform and service improvement.

Your responsibilities will be:

1. Account Management:

  • Manage 5 to 15 mature customer accounts simultaneously, monitoring their KPIs and periodically evaluating their success and value from SynaptiQ.
  • Maintain and build long-term relationships with customers, ensuring their ongoing satisfaction and aligning services with their business goals.
  • Identify opportunities for upselling and cross-selling, enhancing customer engagement and value.
  • Define and report on success metrics for each account, including customer satisfaction scores, retention rates, and revenue generated from upselling.

2. Issue and Opportunity Detection:

  • Continuously monitor the health metrics of our customer base to identify critical patterns.
  • Proactively address potential issues and identify opportunities for further engagement and improvement.

3. Client Onboarding:

  • Manage 1 to 3 onboarding projects at a time, tailoring the process to meet each client's unique needs and guiding them towards becoming a mature customer.
  • Ensure a seamless and effective integration of new clients onto the SynaptiQ platform.

4. Training and Webinars:

  • Conduct comprehensive training sessions and webinars for clients to ensure proficient use of the SynaptiQ platform.
  • Develop user guides and training materials tailored to client needs.
  • Foster customer advocacy by creating case studies, testimonials, and facilitating customer references that highlight the success and value of our platform.

5. Collaboration and Continuous Improvement:

  • Work collaboratively within the Customer Success team and with other teams, including Presales, Support, and Development.
  • Contribute to the ongoing growth and improvement of the platform and services.

To successfully fill this role, we are looking for someone with:

  • A Master's degree in Engineering, or a related field.
  • Minimum 2 years of experience in a customer-facing role, ideally in a high-growth environment.
  • Proven track record of managing customer relationships and ensuring customer success.
  • Strong analytical skills with a focus on KPIs and customer metrics.
  • Full professional proficiency in English, with additional languages such as Dutch or French being a bonus.
  • A commercial mindset, balanced with the ability to manage hands-on work and strategic projects.
  • A proactive, results-driven attitude with a strong "get things done" mentality.
  • Exceptional personal attributes, including empathy, patience, excellent listening skills, and the ability to remain calm under pressure.

Bonus points for:

  • Experience in the energy industry (particularly solar, wind, or storage).
  • Proficiency in CRM or customer success software such as Salesforce, HubSpot, Gainsight, etc.

Our offices are hidden in the centre of Brussels with a view on a pond, with ducks and a heron bringing a regular visit. In addition to a stimulating atmosphere in a highly motivated group of people, 3E offers a unique opportunity to further develop yourself in a company/team with an ambitious growth plan, delivering innovative services.

Furthermore:

  • Training on the job by our experts so you get to know our solution and work in and out.
  • Flexibility in our open-minded company.
  • Home working (2 days per week).
  • An international environment: projects in over 100 countries worldwide, colleagues of over 30 nationalities.
  • Investment in your growth with many soft & hard skills training opportunities.
  • A salary package including hospitalisation insurance, pension saving, €9 meal voucher/day, flexible income plan, 20 legal days off + 12 compensation days (per full year worked), sustainable transport subscription or bike allowance (€0.36/km).

Frequently Asked Questions

Is the salary disclosed for the Customer Success Engineer position at 3E?
The salary for this Customer Success Engineer role at 3E is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the Customer Success Engineer position at 3E located?
This Customer Success Engineer role at 3E is based in Brussels, Brussels, Belgium. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Customer Success Engineer role at 3E full-time or part-time?
This is listed as a Full time position. It is posted as a Customer Success Engineer role in the SynaptiQ Operations department at 3E.
Which team or department does the Customer Success Engineer at 3E belong to?
This Customer Success Engineer position is part of the SynaptiQ Operations department at 3E. See the full job description for more information about the team structure and responsibilities.
How do I apply for the Customer Success Engineer position at 3E?
Click the "Apply Now" button on this page. You will be redirected to 3E's official application portal hosted on workable where you can submit your application directly.
When was the Customer Success Engineer job at 3E posted?
This Customer Success Engineer position at 3E was posted on Apr 3, 2026. Apply as soon as possible — early applications are often reviewed first.
Customer Success Engineer
3E
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