ticketmaster.com · iOS · Android
A reactive multi-backend enrichment service joining the HOST and ARCHTICS ticketing systems, plus the Transfer and Assign endpoints behind every ticket handoff.
560M+ customers globally
São Paulo, Brazil — remote to Beverly Hills, California
Rafael DiasFerreira
Backend engineer · 5+ years · Java, Spring WebFlux, AWS, Azure
I build the services underneath products people already use — ticketing for 560 million fans at Ticketmaster, banking for 55 million customers at Santander.
- 560M+
- customers reached by the Ticketmaster systems I work on
- 55M+
- Santander customers receiving campaign offers I helped deliver
- 4.2M
- requests handled inside a fifteen-minute migration window
- 20+
- security vulnerabilities found and reported in banking products
01 — In production
The products my code runs under
Nobody sees a backend service. They see the app that loads. These are the ones mine sit behind.
Presence SDK — team apps
2024 →NFL · NBA · NHL · MLB · MLS · Premier League
Ticket segmentation built alongside the Warriors and Guardians engineering teams, and the venue-filtering fix that unblocked ten international markets.
100+ apps · 10 markets
Retail app · Internet banking · ATM
Campaign services putting the right offer in front of retail customers, engineered end to end on Apache Camel and IBM Campaign.
55M+ customers · +25% sales
Business app · Internet banking for companies
The same campaign engine serving business accounts, extended to carry offers from Santander partner companies.
+15% campaign efficiency
Santander Way
2021–25Cards app · Santander Brazil
Card customers reached by the same offer pipeline, so a campaign built once lands in every place a customer looks.
Part of the 55M+ customer base
IVR and call center
2021–25Internal · Santander Brazil
Offers surfaced to IVR menus and to the operators on the phone, on the service version that handled 4.2 million requests in fifteen minutes.
+40% transaction efficiency
C2 — Portal do Gerente
2022–25Internal · Santander Brazil
Around 60% of the backend microservices for the manager portal, on Java and Azure, changing how managers build schedules and interact with clients.
6,000+ managers nationwide
J4
2021–25Internal · Santander Brazil
Launched on Java 11 and Angular 12 over Azure with a 50% performance gain, then hardened against the vulnerabilities an ethical-hacking assessment surfaced.
+50% system performance
OnMaps
2020–21Geofusion · SaaS · Geospatial analytics
Geospatial analytics and an Elastic Stack pipeline feeding the geographic and financial dashboards clients work in every day.
+35% analytical precision
02 — Coverage
Every team app the SDK ships to
One change to the Presence SDK lands in all 116 of these apps at once. That is the part of the job that keeps me careful.
NFL
32 apps
NBA
15 apps
NHL
14 apps
MLB
8 apps
MLS
6 apps
Premier League
3 apps
AFL & rugby
6 apps
Carlton · Essendon Bombers · Fremantle Dockers · Richmond · DHL Stormers · Harlequins
College athletics
6 apps
College Football Playoffs · Dayton Flyers · Iowa State Cyclones · Missouri Tigers · Kentucky Athletics · Omaha Mavericks
Events & venues
12 apps
Australian Open · US Open Tennis · USTA · PGA Tour · WWE · Osheaga · Rogers Cup Montréal · Levi’s Stadium · Moda Center · Winnipeg Blue Bombers · Frölunda HC · Stavanger Oilers
Microflex markets
14 apps
Austria · Belgium · Czechia · Denmark · Finland · Germany · Netherlands · Norway · Poland · South Africa · Spain · Sweden · Switzerland · United Arab Emirates
Team names and crests belong to their respective clubs and leagues. They are shown to identify the apps this work reaches.
03 — Experience
Where the work happened
Five years across ticketing at global scale, banking CRM and geospatial analytics.
Ticketmaster
Software Engineer — Contractor
- Engineered a reactive multi-backend enrichment service across the HOST and ARCHTICS ticketing systems, enabling ticket segmentation for 100+ team applications serving 560M+ customers.
- Delivered 118 features and critical fixes, including 5 P1 incidents, with zero-downtime feature-flagged rollouts and under 200ms P95 latency impact.
- Led the migration of 12 Transfer and Assign endpoints off the deprecated public gateway to the internal Marketplace API, coordinating with the Post Purchase and Platform teams.
- Replaced Microflex venue codes with canonical Discovery API IDs, fixing multi-market filtering for 40+ team apps across Belgium, the Netherlands, Spain and the UAE with no customer-facing downtime.
- Rebuilt cache invalidation with Project Reactor, eliminating 30–60 second ticket visibility delays and cutting P2 support escalations by 40%.
Santander Bank
Senior Software Engineer — CRM
- Delivered about 60% of the backend microservices for C2, the new manager portal, changing how managers build schedules and interact with clients.
- Extended the Campaign Management service so 6,000+ managers nationwide could put the right offer in front of more than 55 million customers.
- Led the remediation of the vulnerabilities found in the J4 portal during an ethical-hacking assessment.
- Reported 20+ security vulnerabilities across Santander products, hardening them against data exposure attacks.
- Ran the technology research that raised project efficiency by 60% and improved failure and incident tracking by 40%.
Santander Bank
Software Engineer — CRM
- Coordinated five engineers deploying Java 11 and Angular 12 microservices on Azure, launching the J4 portal with a 50% performance gain.
- Engineered end-to-end campaign delivery on Apache Camel and IBM Campaign, driving a 25% increase in sales and 40% more customer engagement.
- Integrated Santander partner companies into a new Java 17 application for specialised bank campaigns, improving campaign efficiency by 15%.
- Acted as SME for the channel migration that processed 4.2 million requests in fifteen minutes across every Santander application in Brazil.
- Reworked service delivery across ATMs, IVR, mobile, internet banking, the manager portal and call centers — 40% more transaction efficiency and 25% higher satisfaction.
Geofusion
Junior Software Engineer
- Built an Elastic Stack data transfer system feeding geographic and financial client dashboards, improving analytical precision and timeliness by 35%.
- Added geospatial analytics to the OnMaps SaaS platform, lifting customer satisfaction by 35% and growing the customer base 15% in six months.
04 — Stack
What I build with
Reactive Java on the backend, two clouds, and the observability tooling that keeps both honest.
- Languages
- JavaPythonNode.jsSwiftKotlinPowerShellLua
- Frameworks
- Spring Boot 3Spring WebFluxSpring SecurityProject ReactorJPAHibernateApache Camel
- Testing
- JUnit 4JUnit 5MockitoCucumberStepVerifierWebTestClient
- Data
- PostgreSQLMySQLCosmos DBDynamoDBRedis
- Messaging
- KafkaRabbitMQ
- Cloud & infra
- AWS S3SQSSNSLambdaAzure Event HubBlob StorageKey VaultDockerKubernetes
- Observability
- SplunkGrafanaDynatraceElasticsearchLogstashKibana
- CI/CD
- GitLab CIJenkinsCloudBeesGitHub Actions
- Security & quality
- SonarQubeFortify
- Front-end
- ReactAngularHTMLCSS
05 — Education
Education
2020 — 2024
Faculdade Metropolitana Unidas (FMU)
Bachelor in Computer Science — external transfer from UFMA
São Paulo, SP
2020
Digital House Brasil
Full-stack web development — Node and React
São Paulo, SP
2013 — 2019
Universidade Federal do Maranhão (UFMA)
Bachelor in Computer Science
Maranhão, MA
06 — Contact
Let's talk
Open to senior backend and platform roles, remote or based in São Paulo. Fastest reply is on LinkedIn.
LinkedIn rafael-dias-ferreira GitHub FaelDi Email dev.rafael.dias.ferreira@gmail.com Resume PDF, English
© 2026 Rafael Dias Ferreira Built with Astro · São Paulo, Brazil