Senior Systems Integration Engineer - Remote & Equity

Ontologize, Inc.; Greater London; Hybrid; GBP 90,000 - 135,000; Full time

Benefits offered by this job

Highly competitive package

Equity option

Remote-first, flexible work

Job summary

Nscale is hiring a Systems Integration Engineer to design, build, and maintain integrations across ERP, HRIS, CRM, ATS, ITSM, and finance systems. You’ll define patterns, build automation workflows, and ensure data flows reliably as the company scales.

You'll collaborate with external consultants, participate in architecture decisions, and drive data quality across the enterprise. You’ll work with REST APIs, webhooks, and data transformation; experience with Palantir Foundry is a plus, and

Qualifications

• 4+ years hands-on experience building enterprise integrations across finance, supply chain applications.
• Strong understanding of REST APIs, webhooks.
• Experience with at least one integration platform (Workato, Celigo, MuleSoft, Boomi, Make) or custom API development.
• Proficiency in a scripting language (Python preferred).
• Experience integrating ERP/HRIS/CRM/ATS systems (NetSuite/SAP/Workday/Salesforce etc.).
• Solid data modelling, ETL/ELT patterns, and data transformation knowledge.
• Ability to read/write SQL for data validation and troubleshooting.
• Strong troubleshooting skills with API logs, HTTP requests, and JSON payloads.

Responsibilities

• Design and build integrations between core business systems (ERP, HRIS, CRM, ATS, ITSM, finance, procurement)
• Implement API-based integrations, webhooks, scheduled data syncs, and event-driven workflows
• Collaborate with Palantir Foundry team to enable as primary integration platform
• Maintain data transformation logic, mappings, and validation rules
• Design error handling, retry logic, and monitoring for production integrations
• Architect and support integrations with upstream and downstream systems
• Lead data migration for new entities and acquisitions
• Own the systems development lifecycle including source control, testing and deployment
• Translate business requirements into documented technical solutions and partner with external consultants
• Define integration patterns and standards (REST, webhooks, batch ETL, SSO/SAML)
• Evaluate trade-offs between point-to-point, hub-and-spoke, event-driven architectures
• Create ADRs and integration documentation
• Collaborate with Enterprise Architecture to align with target state architecture
• Ensure data consistency across systems - single source of truth for users, customers, contracts, financial data
• Build data quality checks into integration pipelines
• Identify and resolve data sync issues and mapping errors
• Work with business owners to define data ownership and master data management rules
• Evaluate integration tools, platforms, and SaaS connectors
• Conduct proof-of-concept builds to validate feasibility
• Assess API capabilities, rate limits, auth methods, and webhook reliability
• Maintain awareness of integration technology landscape and patterns
• Monitor integration health, track API errors and failed syncs
• Build dashboards and alerting for pipelines
• Troubleshoot failures and implement fixes
• Document runbooks and support procedures
• Provide Level 2/3 support for integration issues

Skills

REST APIs

Webhooks

Integration platforms

Python

ERP/HRIS/CRM apps

SQL

Troubleshooting

Tools

Workato

Celigo

MuleSoft

Bo

Job description

Nscale is hiring a Systems Integration Engineer to design, build, and maintain integrations across ERP, HRIS, CRM, ATS, ITSM, and finance systems. You’ll define patterns, build automation workflows, and ensure data flows reliably as the company scales.

You'll collaborate with external consultants, participate in architecture decisions, and drive data quality across the enterprise. You’ll work with REST APIs, webhooks, and data transformation; experience with Palantir Foundry is a plus, and