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I'm Erik da Silva Santos, a seasoned Mainframe and Web Developer based in Lisbon, Portugal. I bring over 25 years of experience delivering reliable mainframe solutions (COBOL, CICS, IMS, Natural, JCL, Rexx, and more) and modern web applications using HTML/CSS/JS, Node.js, and databases. I thrive in cross-functional teams, translating business needs into robust software, writing clear technical and non-technical documentation, and ensuring a smooth path from backlog to production. I’m passionate about continuous delivery, DevOps, Agile practices, automated testing, and mentoring teammates. I enjoy solving critical issues, optimizing legacy systems, and exploring new technologies to improve performance and user experience. I’m open to opportunities in Portugal or abroad and welcome collaboration with product owners and developers to drive impactful outcomes.…I'm Erik da Silva Santos, a seasoned Mainframe and Web Developer based in Lisbon, Portugal. I bring over 25 years of experience delivering reliable mainframe solutions (COBOL, CICS, IMS, Natural, JCL, Rexx, and more) and modern web applications using HTML/CSS/JS, Node.js, and databases. I thrive in cross-functional teams, translating business needs into robust software, writing clear technical and non-technical documentation, and ensuring a smooth path from backlog to production. I’m passionate about continuous delivery, DevOps, Agile practices, automated testing, and mentoring teammates. I enjoy solving critical issues, optimizing legacy systems, and exploring new technologies to improve performance and user experience. I’m open to opportunities in Portugal or abroad and welcome collaboration with product owners and developers to drive impactful outcomes.

Erik da Silva Santos

Web Developer, Programmer, Full Stack Developer, +2

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I'm Erik da Silva Santos, a seasoned Mainframe and Web Developer based in Lisbon, Portugal. I bring over 25 years of experience delivering reliable mainframe solutions (COBOL, CICS, IMS, Natural, JCL, Rexx, and more) and modern web applications using HTML/CSS/JS, Node.js, and databases. I thrive in cross-functional teams, translating business needs into robust software, writing clear technical and non-technical documentation, and ensuring a smooth path from backlog to production. I’m passionate about continuous delivery, DevOps, Agile practices, automated testing, and mentoring teammates. I enjoy solving critical issues, optimizing legacy systems, and exploring new technologies to improve performance and user experience. I’m open to opportunities in Portugal or abroad and welcome collaboration with product owners and developers to drive impactful outcomes.…I'm Erik da Silva Santos, a seasoned Mainframe and Web Developer based in Lisbon, Portugal. I bring over 25 years of experience delivering reliable mainframe solutions (COBOL, CICS, IMS, Natural, JCL, Rexx, and more) and modern web applications using HTML/CSS/JS, Node.js, and databases. I thrive in cross-functional teams, translating business needs into robust software, writing clear technical and non-technical documentation, and ensuring a smooth path from backlog to production. I’m passionate about continuous delivery, DevOps, Agile practices, automated testing, and mentoring teammates. I enjoy solving critical issues, optimizing legacy systems, and exploring new technologies to improve performance and user experience. I’m open to opportunities in Portugal or abroad and welcome collaboration with product owners and developers to drive impactful outcomes.

Available to hire

I’m Erik da Silva Santos, a seasoned Mainframe and Web Developer based in Lisbon, Portugal. I bring over 25 years of experience delivering reliable mainframe solutions (COBOL, CICS, IMS, Natural, JCL, Rexx, and more) and modern web applications using HTML/CSS/JS, Node.js, and databases. I thrive in cross-functional teams, translating business needs into robust software, writing clear technical and non-technical documentation, and ensuring a smooth path from backlog to production.

I’m passionate about continuous delivery, DevOps, Agile practices, automated testing, and mentoring teammates. I enjoy solving critical issues, optimizing legacy systems, and exploring new technologies to improve performance and user experience. I’m open to opportunities in Portugal or abroad and welcome collaboration with product owners and developers to drive impactful outcomes.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Portuguese

Fluent

English

Fluent

Work Experience

Specialist Mainframe Developer at CA CEIS/Klx – MDS Sell Team

March 1, 2023 - Present

Take backlog tasks with the business analyst, work on the solution and provide technical and non-technical documents describing the solution, including impact analysis and required test scenarios. Once approved by the customer, code and implement in quality and then production environments. Also contribute recommendations to optimize the current processes where possible.

Specialist Mainframe Developer at Bank Leumi/Credit System

February 1, 2022 - March 1, 2023

Analyze different types of requirements and implement changes in Natural/Adabas, COBOL, CICS, JCL, and SORT; perform Db2 database changes as necessary; focus on optimization, improvements and solving production issues reported by the Tech Leader in Tel Aviv.

Specialist Mainframe Developer at BPI/Dataware house team

June 1, 2020 - January 1, 2022

Analyze requirements; code in COBOL, JCL, SORT; update Db2 as needed; optimize and reprocess routines. Main project: Reprocessing 10 years of data for the SIOPEIA client to feed the database; join 10 production routines into a single process and parameterize file entry; survey files and adapt to formatting changes.

MVS Support Analyst at BNP Paribas

June 1, 2019 - June 1, 2020

Data analysis and decision-support for application optimization; create, schedule, and optimize JCL flows via TWC/OPC; system interventions via SDSF and batch monitoring. Main project included revision/adjustment of COBOL programs from older versions for a new compiler VI (approximately 200 programs).

Web Developer at RIA Works

April 1, 2018 - January 1, 2019

GetModal project: developed a Windows interface to print package labels using Visual C# with WPF; capable of retrieving data by invoice number, capturing weight, and printing a label for delivery. Also reviewed and adjusted GetModal API endpoints before production.

Senior IT Specialist at IBM

December 1, 2005 - March 1, 2018

Global Logistics – North America Exports: supported backlog management with the Business Analyst, elaborated user stories and tasks with sufficient sprint granularity; practiced collaborative, self-organized agile methods; used Rational Functional Tester for automated testing. Intercompany – CIAS System: developed and supported CIAS; promoted Agile concepts with whiteboard/Mural; contributed to API module development for Java applications in the MCS/2 system.

System Analyst at EDS (Actual HP)

February 1, 2001 - November 1, 2005

Supported ABN Amro Real Bank (now Santander): provided support, development, tuning and maintenance of the credit card system; wrote technical requirements for programmers and translated business requirements into product owner tasks.

Mainframe Programmer at Bank Itaú

June 1, 1998 - January 1, 2001

Mainframe programmer responsible for COBOL, IMS DB/DC or CICS enhancements; supported multiple systems including Leasing, Rural credit analysis and pension plans.