Client Onboarding & Data Integration Engineer

Diesta; Greater London; Hybrid; GBP 65,000 - 90,000; Full time

Benefits offered by this job

Hybrid work model

London office (Bank/Liverpool Street)

22 days annual leave

State-of-the-art equipment

Team lunches and offsites

Job summary

Diesta is seeking an Implementation Engineer to lead client onboarding, data integration, and end-to-end delivery of our platform. This hybrid role combines consulting, data engineering, and solution design for insurers and brokers in London.

You will own onboarding projects from discovery to go-live, build ingestion and reconciliation workflows, and work cross-functionally with Product and Engineering to refine the onboarding experience.

Qualifications

• Strong analytical mindset with ability to understand complex operational workflows.
• Experience with CSV, Excel, SQL databases, and APIs.
• Proficiency in SQL (MySQL preferred) and scripting languages like Python.
• Ability to diagnose and resolve data quality, transformation, and mapping issues.
• Comfortable leading client discussions and extracting requirements from ambiguity.

Responsibilities

• Lead technical discovery sessions to map data sources, payment flows, and reconciliation processes.
• Design and implement data mappings, validation checks, and ingestion workflows.
• Architect and configure client-specific ingestion, matching, and reconciliation rules.
• Build proof-of-concept integrations to demonstrate platform value early in onboarding.
• Execute full onboarding cycles, including testing, troubleshooting, and documentation.
• Serve as the main technical point of contact throughout onboarding.
• Collaborate with Product and Engineering to enhance platform capabilities.
• Identify onboarding patterns and contribute to reusable templates and tooling.

Skills

SQL

Python

stakeholder management

Data analysis

Tools

AWS

ETL

APIs

MySQL

Job description

Diesta is seeking an Implementation Engineer to lead client onboarding, data integration, and end-to-end delivery of our platform. This hybrid role combines consulting, data engineering, and solution design for insurers and brokers in London.

You will own onboarding projects from discovery to go-live, build ingestion and reconciliation workflows, and work cross-functionally with Product and Engineering to refine the onboarding experience.