Cristian Poncela Pérez

Led delivery of a .NET / Blazor Server healthcare-sector application as Team Lead — owning technical coordination, architecture alignment, planning, and stakeholder communication throughout.

Worked closely with the architect and development team on key technical decisions, including the design of a dedicated .NET migration application for go-live data migration from SQL Server and IBM DB2 into the main system database. The migration application handled extraction, transformation, deduplication, harmonisation, and loading across heterogeneous sources, executed via Azure Pipelines. A deduplication step combined rule-based matching with an LLM-assisted classification component to resolve ambiguous cases — entities that were syntactically similar or semantically equivalent but expressed differently across systems.

Defined engineering standards and reviewed code to ensure quality and maintainability. Managed requirements, sprint planning, and client communication throughout.

Identified and resolved critical security vulnerabilities across backend services and APIs, remediating over 10 compromised services and one critical API. Maintained ISO 27001 compliance through proactive security practices.

Owned Sev1 incident management end-to-end, reducing mean resolution time by up to 90% through structured technical resolution and preventive measures. Built internal automation tools (Java, Python, Jira Automation, Power BI) improving operational efficiency by up to 25%.

Remained deeply hands-on in the Java/Spring Boot codebase, contributing backend features, fixes, and performance improvements across the platform.

Contributed to architecture discussions with senior stakeholders and the CTO, influencing platform direction and system evolution.

Led a fully remote, multicultural team of 10 engineers across Asia, Europe, and the Americas through two regional Team Leads. Defined OKRs, conducted performance reviews and 1:1s.

Improved release reliability and deployment frequency by up to 80% through engineering and process improvements.

Increased release quality by up to 140% through improvements in code review practices and delivery workflows.

Stayed deeply involved in backend development, delivering features, fixes, and ERP integrations in a Java/Spring Boot distributed SaaS platform — contributing directly to a 15% NPS improvement.

Built and coordinated a cross-regional engineering team spanning Europe, Asia, and the Americas, enabling 20/5 operational coverage.

Ensured reliable production delivery through ownership of deployments and release coordination.

Improved backend and database performance, achieving up to 20× improvements through query optimisation and backend refactoring.

Built REST APIs and backend modules using Java, Spring, Hibernate, JDBC, and PostgreSQL. Designed a hybrid relational/document data model (PostgreSQL + JSONB) to support flexible multi-tenant configurations.

Delivered full lifecycle enterprise implementations, including SAP integration and localisation for major clients.

Supported Agile delivery processes as the team scaled.

Maintained three enterprise Oracle FMW applications for FCC; assumed full project responsibility within four months. Managed client requirements, change verification, and delivery sign-off. Trained and supervised a junior developer.