Sergio Davidiants Misailidi

Java Backend Software Developer with experience in designing, developing and maintaining REST API microservices using modern Java, Spring Boot, SQL databases and enterprise backend architectures. Currently working on an ING Bank project, combining hands-on Java backend development with Azure DevOps-oriented responsibilities in a production microservices environment. The role includes microservices monitoring with Prometheus and Grafana, incident investigation, log analysis, deployment support, Azure DevOps pipelines, OpenShift/Kubernetes environments and IT Risk evidence collection for regulatory and compliance purposes.

Strong background in backend development, SQL/database work, performance analysis, code quality, production troubleshooting, observability and clean architecture principles, including event-driven architecture, hexagonal architecture and Domain-Driven Design.

Java Backend & Azure DevOps Engineer at Amaris Consulting (2025-05 – Present)

ING Bank (May 2026 - Present): The role combines hands-on Java backend development with DevOps-oriented responsibilities, including production deployments, incident investigation, microservices monitoring with Prometheus and Grafana, Azure DevOps pipelines, log analysis, and IT Risk evidence collection for regulatory and compliance purposes.

• Monitor production microservices using Prometheus and Grafana, reviewing application metrics, dashboards, alerts, logs, and operational indicators to support service stability

Java Backend Developer | MS SQL Server Performance Tuning Specialist at SGS (2023-01 – 2025-12)

• Developed and maintained LabVantage LIMS backend components and extensions using Java / JavaScript, supporting laboratory processes for SGS.
• Supported and enhanced JasperSoft / JasperReports reporting in LIMS, including JRXML templates, datasets/subreports, and report troubleshooting.
• Tuned and refactored SQL for high-volume LIMS/BI reporting workloads (OLTP/OLAP), improving query efficiency and runtime stability.
• Designed and optimised stored procedures (T-SQL) and supporting database objects; aligned DB output with JRXML/report requirements.
• Performed performance diagnostics across DEV/UAT/PROD (Query Store, DMVs, waits/locks, XEvents) and recommended indexing/statistics improvements.

Software Engineer at Capgemini (2023-01 – 2025-12)

RESTful microservices development with Java 8/Java EE (SOAP) and Spring Boot framework for the Ministry of Economic Affairs and Digital Transformation (MINECO).

Java Backend Developer at AUDIFILM GRUPOAL SOFTWARE S.L. (2022-01 – 2023-12)

Development of REST web services with Java 8 and Spring Boot framework, and backend applications with Java EE and SOAP.

Java Backend Developer at GantaBI, S.L. (2021-01 – 2022-12)

Designed and deployed RESTful microservices using Java 17 and Vert.x, leveraging AWS services including Lambda, S3, EKS, API Gateway, and Load Balancer; implemented CI/CD pipelines for automated deployment and scalability.

• Developed the server using the Rest API, OpenAPI 3.0 and Swagger, Apache Kafka, Postgres, Redis, Google Cloud, Kubernetes, Flyway, Liquidbase.

Java Backend Developer at Barcelona's City Hall Open Data Service - Open Data BCN (2020-01 – 2021-12)

Java Backend Development with Spring Framework, developing the virtual assistant, research tools and mountains of tips that help achieve effective planning with the support of experts in success management.

System Engineer / Sys.admin. at Tecollo Auto Parts, S.L. (2019-01 – 2020-12)

Design, implementation and administration of the CRM / ERP Odoo (Inventory, Purchases, Sales, Billing / Accounting, Barcodes, Point of Sale / Logistics) + eCommerce with PrestaShop, WordPress, WooCommerce + the catalog of car parts integrated into PrestasShop with more than a million of articles.

Information Technology Programmer at Skin Tech Pharma Group (2018-01 – 2019-12)

eCommerce development with WooCommerce + SEO optimization

Fiber optic technician at Girona Fibra, S.L. (2018-01 – 2018-12)

Fiber optic installation, fusion, WAN/LAN installation and configuration

System Administrator at Construcciones Stan Lloret, S.L. (2013-01 – 2018-12)

Web design + content management with Wordpress, Joomla, real estate CRM administration + SEO optimization + SEM/SMO

System and network administrator at Acerko Telecom (2011-01 – 2013-12)

Design, installation and implementation of wired and wireless networks for short distances (up to 20 km) + web development + SEO

IT technician at LA Service (2009-01 – 2011-12)

Computer repair + mobile phone unlock service

Software tester at Konica Minolta (2005-01 – 2006-12)

Drivers + software testing of the personal and industrial printers in the engineering department of the Central European headquarter of Konica Minolta

Bootcamp in Backend Java Developer with Spring Framework, SQL databases and NoSQL databases – IT Academy (2022-01 – 2022-12)

CFGS in Web Application Development – School (2020-01 – 2022-12)

Course in Frontend Development – School (2019-01 – 2020-12)

Course in PHP 7, Laravel and MySQL Web Development, 600h, Level 3 – School (2019-01 – 2019-12)

Course in C# and.NET Framework, MS SQL Server, Desktop Application Development – School (2018-01 – 2018-12)

Faculty of Information Technology – Open University of the Netherlands (2014-01 – 2016-12)

Computer Systems and Network Administration – Vocational Education and Training (2002-01 – 2005-12)