Systems Integration Engineer

The Ideal Candidate

The ideal candidate is a technical integration specialist with a strong background in API and SDK-based solutioning, and a proven ability to own the end-to-end technical integration of complex SaaS products in a fintech environment. They bring a design-first mindset, combining technical rigor with clear communication. They are equally comfortable working through integration architecture with a customer’s technical team and translating approved designs into precise, testable implementations.

The Role

We are looking for a Systems Integration Engineer to join our Technical Delivery team, reporting to the Senior Director of Technical Delivery. As a Systems Integration Engineer, you will own the technical integration between Entersekt’s SaaS products and customer environments. Responsible for integration design quality, API and SDK guidance, technical testing and fault diagnosis through to go-live, tracking and managing activity through agreed systems and processes.

You will work closely with Implementation Managers, who coordinate onboarding and manage change requests, and with Implementation Engineers, who own platform configuration and execution. Your focus is on the technical integration layer, ensuring designs are correct, risks are identified and managed, and integrations are delivered to the highest standard.

You will engage directly with customer technical teams, providing expert guidance and ensuring alignment between Entersekt’s integration standards and the customer’s technical environment. You will also be in a unique position to help make recommendations regarding the next generation of product and integration standards and will partner with the product team as part of this continuing evolution.

Key Responsibilities

Integration Design & Solutioning

• Own the technical integration design for new and existing customer onboarding, ensuring correctness and alignment with Entersekt’s platform standards
• Provide API and SDK integration guidance to customer technical teams, translating Entersekt’s product capabilities into clear, implementable integration designs
• Define integration specifications, data flows and authentication configurations in support of approved solution designs
• Identify and communicate integration risks early, applying sound technical judgement to prioritise and mitigate issues
• Ensure network integration requirements, including connectivity, firewall rules and certificate exchange are correctly defined and coordinated

Technical Testing & Fault Diagnostics

• Lead technical testing activities across pre-production and production environments, validating integration correctness prior to go-live
• Perform structured fault diagnosis for integration issues, identifying root causes and driving resolution in collaboration with internal and customer teams
• Define and execute integration test plans, ensuring coverage of key flows, edge cases and security requirements
• Support go-live readiness reviews, providing technical sign-off on integration quality and stability

Customer Technical Engagement

• Engage directly with customer technical teams as the primary technical integration contact during onboarding
• Communicate integration designs, requirements and readiness status clearly and confidently to technical and semi-technical stakeholders
• Manage technical dependencies and integration milestones in coordination with the Implementation Manager
• Provide post-go-live technical handover to Customer Success or Support teams, including integration documentation and known considerations

Collaboration & Delivery

• Work closely with Implementation Engineers to ensure configuration activities accurately reflect approved integration designs
• Collaborate with Solutions Architects, Product and Hosting teams to resolve complex integration challenges and feed back integration learnings
• Adhere to Entersekt’s change management, release and integration governance processes including activity tracking and reporting
• Maintain accurate and thorough integration documentation, including design records, test outcomes and handover artefacts
• Contribute to the continuous improvement and scalability of integration delivery processes, standards and tooling

Skills & Experience

Must-Have Qualifications & Experience

• Bachelor’s degree in Engineering, Computer Science, Information Systems or a related field
• 7+ years’ experience in technical integration, solution engineering or systems integration within a SaaS or fintech environment
• Strong hands-on experience with REST/SOAP APIs, SDK integration and web services architecture
• Solid understanding of security concepts including PKI, TLS/SSL, certificates and key management
• Proven ability to own technical integration design from initial solutioning through to go-live
• Experience engaging directly with customer technical teams in a delivery or pre-sales engineering context
• Familiarity with ticketing and delivery tools (e.g., Jira, Zendesk)

Nice to Have

• Fintech domain experience, including EMV 3DS and Secure Customer Authentication (SCA)
• Scripting or automation experience supporting integration testing or deployment activities
• Familiarity with mobile SDK integration (Android / iOS)
• Experience working in formal change and release-controlled environments

Personality Attributes

• Technically Rigorous: Applies depth and precision to integration design, testing and fault diagnosis
• Design-Led: Approaches integration challenges with a structured, solution-oriented mindset
• Risk-Aware: Identifies and communicates technical risks clearly, with a focus on control and prioritisation
• Collaborative: Works effectively with Implementation Managers, Implementation Engineers and customer technical teams
• Clear Communicator: Translates complex technical concepts into clear guidance for both technical and non-technical audiences
• Accountable: Takes ownership of integration quality and correctness from design through to go-live