Customer Success Engineer

# Customer Success Engineer

> 3E · Brussels, Belgium (Hybrid) · Full-time · Posted 2026-04-03

**Workplace:** hybrid

**Department:** Customer Success

## Description

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.

## Requirements

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.

## Benefits

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).

## Apply
[Apply at 3E](https://apply.workable.com/3e/j/1A99EC3B15/apply)
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