iOS Engineering
Deep expertise in native iOS from low-level integration to modern declarative UI, applied consistently in production at scale.
- Swift
- SwiftUI
- Combine
- watchOS
- MVVM-C
- VIPER
- Modular Architecture
- Clean Architecture
- SOLID
- REST API Design
Engineering Leader
Growing engineering teams, raising the architecture bar, and delivering at scale.
Engineering Leader with 10+ years in iOS development and 7+ years in technical leadership and architecture roles. Proven track record leading distributed teams across Spain, UK, and India — defining mobile strategy, delivering enterprise-grade apps in highly regulated environments, and crafting architectures that are maintainable, testable, and built to last.
- 10+ Years in iOS development
- 7+ Years in technical leadership & architecture
- 13 Engineers led across distributed teams
- 40+ Markets reached with InControl Remote
- 3 Languages — Spanish, English, Portuguese
Capabilities
What I bring to the table
From native iOS engineering to delivery pipelines and team leadership — skills built and tested in production.
Delivery & DevOps
End-to-end ownership of the delivery workflows and pipelines, from architecture decisions through to release automation and enterprise security.
- GitHub Actions
- Jenkins
- GitLab
- Fastlane
- TDD / BDD / ATDD
- Scrum
- Kanban
- SAFe
- Spotify Model
- MDM / MAM / Intune
Leadership & Strategy
Building and scaling engineering teams, establishing technical communities, and aligning mobile capability with business goals.
- Chapter Lead
- People Management
- Mentoring
- Career Development
- Mobile Strategy
- Cross-functional Alignment
- Architecture Reviews
Selected work
Featured work
A selection of roles where I owned both the architecture and the outcome.
Inditex — iOS Chapter Lead & Architect
Led iOS capability across the SPAI region (Spain, Portugal, Italy) at Cognizant, mentoring 12 senior engineers while simultaneously leading a 5-engineer team at Inditex, delivering a new app from scratch.
Designed a modular MVVM-C architecture in SwiftUI and Combine that improved development velocity through reusable patterns and reduced onboarding time via structured documentation and architecture decision records.
- SwiftUI
- Combine
- MVVM-C
- Modular Architecture
- GitHub Actions
- API-first Design
- Azure DevOps
HSBC — iOS Architect, Mobile Centre of Excellence
Joined the Enterprise Mobile CoE at HSBC as the iOS Subject Matter Expert (SME), responsible for architecture governance across multiple teams in a highly regulated banking environment.
Designed the enterprise iOS template architecture adopted across teams, eliminating boilerplate and standardising development. Defined mobile security patterns integrated with Intune, Zimperium, and BlackBerry UEM.
- MVVM-C
- Clean Architecture
- SOLID
- Intune
- BlackBerry UEM
- Zimperium
- UML
Jaguar Land Rover — InControl Remote Apps
Led the redevelopment of the Land Rover and Jaguar InControl Remote apps from scratch as iOS Technical Leader, managing a distributed team of 8-13 engineers across the United Kingdom, Belarus, and India.
Delivered a scalable architecture supporting multi-country releases across 40+ markets. Built CI/CD pipelines, introduced BDD and ATDD practices, and owned end-to-end feature delivery including backend and app integration.
- Swift
- Objective-C
- Jenkins
- GitLab
- Fastlane
- Firebase
- WebSockets
- SAFe
- BDD
Soft skills
How I work
The behaviours and practices that shape how I lead teams and make technical decisions.
Technical Leadership
Led distributed teams of up to 13 engineers across multiple time zones at JLR, and defined the iOS chapter strategy for an entire region at Cognizant — balancing hands-on architecture work with people growth and delivery accountability.
Cross-functional Alignment
Consistently bridged mobile, backend, product, and security disciplines. At HSBC, partnered with the Android architect to ensure parity. At Inditex, facilitated 3 Amigos and Example Mapping sessions to align business and engineering before a line of code was written.
Mentoring & Team Growth
Built structured onboarding processes at JLR, HSBC, Cognizant, and Inditex, defined career paths and growth plans at Cognizant, and established internal iOS communities with technical workshops, knowledge sharing, and architecture reviews.
Recommendations
Selected endorsements from colleagues and collaborators on LinkedIn.
LinkedIn recommendations
View profile“Working with Juanjo over these years has been an absolute pleasure, he is one of those professionals who truly leaves a mark on everyone they work with. What sets Juanjo apart is the combination of deep technical expertise and outstanding ... soft skills. He doesn't just get the job done; he takes full ownership of everything he touches, anticipates challenges before they arise, and brings the kind of calm, reliable energy that makes teams better around him. If Juanjo is part of a project, success is not a goal, it's a guarantee. I couldn't recommend him more highly. ”
“I had the pleasure of working with Juan at HSBC Company, collaborating on project teams. His expertise in IOS development and architect made things smooth in delivering. I was particularly impressed by Juan's ability to handle even the ... toughest issues effortlessly. That skill often takes years, but it seemed to come perfectly naturally to him. Juan would be an asset to any team. ”
“Very good iOS skills and architecture skills, along with experience in Android, allowed him to lead the team as an Architect and a mentor. Juan is very easy to get along with, resolves conflicts swiftly, while also being good at ... communicating, either giving praise or raising issues according to situation. I highly recommend Juan, it was a great pleasure to be able to work together. ”
“I had a brief pleasure working with Juan. He is an enthusiastic and detail-oriented tech leader, with great people skills and strong technical expertise in iOS development. He is a true SOLID engineer, always advocating for clean ... architecture, testing, quality, and ready to go the extra mile to automate it. He is very approachable and a good team player. Definitely recommended working with him. ”
“Juan Rebollo is a senior iOS developer, who holds the role of iOS Platform Technical Lead for the development of Jaguar and Land Rover InControl Remote mobile apps. His in-depth knowledge of our products and his comprehensive understanding ... of the iOS platform has made him an invaluable asset to the organisation. Juan has an extreme eye for detail and is very data-driven in his approach. He has excellent verbal and written communication skills and can communicate effectively at all levels, including senior management. Juan has a true can-do approach which is both inspiring and infectious. Any organisation would benefit from somebody of Juan's calibre. He always delivers, is totally customer focused, and very dependable. ”
Contact
Let's talk
Whether you're scaling a mobile team, raising the architecture bar, or need someone to own delivery end-to-end — I'd be glad to connect.
Open to Head of Mobile, Solutions Architect, Technical Lead, and Principal Engineer roles. Based in Spain — open to remote and hybrid arrangements in Europe and the UK.
jj.rebollo.barranco@gmail.comFind me on