- Since 2019
- Curitiba · remote
- EN · PT
Custom software, from product to deploy
Websites, web systems, apps and AI solutions for companies that need technology done right, with direct access to the people who build it.
- JeanPSF in business since
- 2019
- years of software engineering
- 8+
const jeanpsf = {
delivers: [
"Websites and landing pages",
"Custom web systems",
"Mobile apps",
"AI and automation",
"Legacy system integration",
"Technical leadership on demand"
],
contact: "direct",
}; Services
From first prototype to production system.
Scope, stack and timeline shaped around your problem, not a one-size-fits-all package.
-
Websites and landing pages
Fast, accessible corporate websites and conversion pages, ready for Google, with technical SEO and edge hosting.
-
Custom web systems
Portals, admin dashboards and internal systems that organize processes and replace spreadsheets.
-
Mobile apps
Cross-platform Android and iOS apps from a single codebase.
-
AI and automation
Customer service and triage chats, agents that query your company data, and automations that remove repetitive work.
-
Legacy system integration
Modern systems that talk to the infrastructure you already have, unlocking new features without stopping operations.
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Technical leadership on demand
Architecture, code review, CI/CD and development processes for teams that need more pace and quality.
Work
A track record in projects.
Systems and products the founder of JeanPSF has architected, led or built since 2018.
-
2025
Insper
Tech lead and software architect
Management system for open and custom courses, covering the full workflow from course planning to class delivery.
- Over 500 courses and 2,000 classes managed
- Clients, rooms, lessons and staff managed in a single system
- Schedule conflict detection and notification system
-
2025
OAB Paraná (Brazilian Bar Association)
Tech lead and software architect
Systems that improved internal processes at the Paraná chapter of the Brazilian Bar Association.
- Court-appointed lawyer payments: turnaround cut from 90 to 30 days, impacting 23,000 lawyers
- Lawyer registration (principal, trainee, supplemental and transfer): from 30 to 3 days
- Ethics and Disciplinary Tribunal: Agenda Manager and Decision Signing Manager, in a project aimed at cutting processing time by up to 50%
- Protection against targeted attacks on systems with over 10,000 daily accesses
-
2022 – 2024
PUCPR
Tech lead and software architect
School management system serving multiple schools and school groups, from elementary to high school.
- Aligned with the Maker Space methodology
- LGPD-compliant: consent terms, privacy policy and data mapping
-
2022 – 2025
REDX
Full-stack engineer · US
App for real estate agents to manage their contacts, integrated with lead management and sales systems.
- Supports the daily work of over 120,000 agents
-
2022 – 2025
Storyy
Full-stack engineer · US
Personal brand creation and management app, integrated with media, video and editing systems.
- Connects digital media production teams with hundreds of social influencers
-
2018 – 2022
Unimed Paraná
Software engineer
Unimed Cliente PR app: find doctors and hospitals, book appointments, contact support and manage the health plan.
- Used daily by over 5 million members
- QUER app: health tracking for people on ongoing medication or with recurring conditions, helping over 10,000 people
How we work
A clear process, visible progress.
- 01
First conversation
We understand the problem, the audience and what needs to be ready first.
- 02
Proposal
Scope, stack, milestones and timeline in writing, before any code is written.
- 03
Iterative development
Short deliveries you follow and approve, adjusting along the way.
- 04
Launch and evolution
Deployment, monitoring and continuous improvement once the project is live.
Direct contact
You talk to the people who design and write the code, no middlemen.
Security and privacy
Security best practices and data protection (LGPD) from day one.
Performance as a requirement
Speed and accessibility that are measured, not promised.
Leadership
Engineering backed by product and team experience.
Jean Paulo dos Santos Filho
Founder and CTO · JeanPSF
Portuguese (native) · English (fluent)
Software engineer since 2018, with a Computer Science degree from PUCPR. Has worked as a full-stack developer, software architect and tech lead on web and mobile products in Brazil and the United States.
Full background on LinkedInOperations and infrastructure today
Availability, health, performance and maintenance of production services for multiple clients.
- client VMs
- 10+
- services in production
- 50+
- databases (PostgreSQL, MongoDB, MySQL and Firebase)
- 100+
- endpoints
- 5,000+
Technologies
- Front-end
- ReactNext.jsAngularAstroTypeScriptJavaScriptReduxTailwind CSSViteZod
- Mobile
- FlutterDartReact NativeIonicMobXHiveRiverpodOffline First
- Back-end
- Node.jsNestJSExpress.jsPrismaTypeORMJavaREST APIsSwagger / OpenAPIJWTMCPFirebaseFirestore
- Data
- PostgreSQLMongoDBMySQLOracleSupabaseCloudflare D1
- Infra & DevOps
- CI/CDGitLab CI/CDGitHub ActionsGitHubGitLabDokployDockerNGINXLinuxVPS / VMsCloudflare WorkersGit
- Operations & reliability
- MonitoringHigh availabilityPerformance tuningIncident responseServer administrationDatabase administration
- AI & tools
- LLMs (Claude)ChatGPTGeminiAI agentsCursorLovable
Contact
Let’s talk about your project?
Tell us what you need. The answer comes from the people who will build it.