This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Technical Account Manager & Support Engineer in Belgium. This role is designed for a technically skilled operator who thrives at the intersection of customer success, solutions engineering, and enterprise infrastructure. You will guide enterprise clients through the full integration lifecycle of complex payments and financial systems, ensuring reliable, scalable, and secure production deployments. This position blends hands-on technical troubleshooting, API and webhook management, and strategic account ownership to help organizations optimize their financial operations. You will collaborate closely with engineering, product, and support teams while building trusted relationships with senior technical stakeholders. The role offers exposure to cutting-edge financial infrastructure, cloud systems, and enterprise-scale workflows in a fast-moving, high-impact environment. Accountabilities: Lead post-sale integration for enterprise customers, including API onboarding, webhook configuration, sandbox testing, UAT, and production launch. Serve as the primary technical contact for assigned accounts, monitoring integration health, transaction activity, and platform usage. Troubleshoot complex technical issues and coordinate resolution across Support, Engineering, and Product teams. Run regular integration status meetings and maintain visibility for internal and customer stakeholders. Develop and maintain integration documentation, runbooks, and internal handoff materials to improve repeatability and knowledge sharing. Conduct quarterly business reviews and identify expansion opportunities within accounts. Support the development of knowledge bases, diagnostic workflows, and internal documentation to reduce support friction. Requirements: 5–7 years of experience in Technical Account Management, Customer Engineering, Solutions Engineering, or a similar role supporting enterprise clients. Hands-on experience with payments APIs, financial infrastructure, or embedded finance integrations involving fund flows, settlement, or reconciliation. Strong proficiency with REST APIs, webhooks, and authentication mechanisms such as OAuth, API keys, or HMAC signing. Skilled in troubleshooting API integrations, analyzing logs, and diagnosing production failures independently. Experience managing technical relationships with enterprise customers, including quarterly reviews and cross-functional issue resolution. Proficiency with developer tooling, observability platforms (e.g., Datadog), and CRM or support systems (e.g., HubSpot, Zendesk). Preferred: experience in blockchain, digital assets, onchain payment flows, or regulated financial environments. Benefits: Remote-first global work environment with flexibility and autonomy. Industry-leading medical, dental, and vision insurance programs. Company matching 401k plan (3% match for US employees). $1,500 Home Office Setup Allowance. $200 Annual Book Allowance and $75 monthly internet/phone reimbursement. Flexible Time Off and quarterly wellness Fridays. Company-issued laptop and wellness benefits, including mental health and egg freezing support. Inclusive, diverse, and supportive company culture. We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.