Björn Fröhling-Senior Software Engineer
Check rate
Experience
Mobile Software Developer (Android)
Finnair
Evolved the Android app for Finnair, focusing on architecture quality, release reliability, and smooth production operations. Partnered with customer support and product stakeholders to triage incidents and deliver stable fixes. Implemented MFA and OAuth 2.0 flows to strengthen account security. Accelerated development velocity using GitHub Copilot for code generation, review assistance, and test scaffolding.
Tech & Tools: Android · Kotlin · Jetpack Compose · AndroidX · Room · DataStore · JUnit4 · AndroidX Test · Espresso · Koin · Fastlane · GitHub Actions · AWS CloudWatch · Datadog · GitHub Copilot
Mobile Software Developer (iOS)
Finnair
Developed and maintained the iOS app as part of Finnair's mobile team. Coordinated release management and facilitated daily standups. Collaborated with customer support to investigate and resolve production incidents.
Tech & Tools: Swift · SwiftUI · Combine · RxSwift · Swift Concurrency · XCTest · XCUITest · GitHub Actions · AWS CloudWatch · Datadog · GitHub Copilot
Test Automation Engineer
Finnair
Built reliable UI test suites for iOS and Android using XCTest/XCUITest, Espresso, and Python/Robot Framework. Integrated end-to-end testing workflows into CI/CD with GitHub Actions.
Tech & Tools: Swift · XCTest · XCUITest · Kotlin · JUnit4 · AndroidX Test · Espresso · Robot Framework · Fastlane · GitHub Actions
Mobile Software Developer
Hoxhunt
Built Hoxhunt's first enterprise iOS app, integrating Apple's Messages App Extension for seamless user interaction. Designed and implemented Single Sign-On (SSO) via Universal Links to streamline authentication workflows.
Tech & Tools: SwiftUI · Combine · XCTest · Universal Links · Messages App Extension
Full-Stack Developer
Iona/Alamy
Modernized Alamy.com, a British stock photography platform with 1M+ monthly visitors, as a Full-Stack Developer. Built frontend and backend features with TypeScript, Next.js, and Nest.js, and maintained Jest unit tests. Also updated a legacy iOS project to meet current App Store requirements.
Tech & Tools: Next.js · TypeScript · Nest.js · Jest · Objective-C
Mobile Software Developer
Reactor/UNIQLO
Collaborated with an international team to develop an in-house store activity planning app for UNIQLO, a leading Japanese retailer. Built the app using RxSwift, following functional programming principles to ensure scalability and maintainability. Conducted testing with XCTest, RxTest, Quick, and Nimble to ensure high-quality deliverables. Collaborated on design specifications using Figma and managed project progress through Slack, Miro, and Jira.
Tech & Tools: RxSwift · XCTest · Quick & Nimble · GitHub · Figma · Jira
Senior Software Engineer
leansolutions.io
Independent software consultancy. Embedded with client engineering teams to deliver Mobile and Full-Stack Web products. Clients include Finnair, Hoxhunt, Reaktor/UNIQLO, and Alamy.
I deliver production-ready software, lead technical decisions, and align engineering execution with business goals, working agentic-first with GitHub Copilot and LLM-assisted workflows.
Skills Swift · SwiftUI · Combine · RxSwift · Kotlin · Jetpack Compose · AndroidX · iOS · Android · React Native · Objective-C · React · Next.js · TypeScript · Node.js · Nest.js · Python · AWS · Docker · CI/CD · GitHub Actions · CloudFormation · Fastlane · XCTest · XCUITest · Espresso · Robot Framework · Jest · JUnit4 · Unity 3D · C# · Git · GitHub · GitLab · Jira · Figma · GitHub Copilot
Lead Developer | DevOps
Ystads Auktioner
Led frontend development and AWS deployment for a high-traffic auction platform. Chose the tech stack and architecture to meet budget and performance targets.
- Built a responsive React/TypeScript interface.
- Automated AWS deployment with EC2, S3, and CloudFormation; achieved 99.9% uptime, and cut deployment time from 2 hours to 15 minutes.
- Set up CloudWatch monitoring and uptime alerts; handled ongoing maintenance and production support.
Tech & Tools: React · AWS · CloudFormation · GitHub Actions
Senior Prototype Developer
Wärtsilä
Contributed to Wärtsilä's mission of transforming traditional marine R&D into an agile, customer-facing process. Built prototypes and internal tools using Rust, Unity3D, and Azure. Containerized services and built CI/CD pipelines.
Project Highlights: iOS Mobile Enterprise App: Developed an app for displaying and tracking maritime operational data, such as speed over ground, trim, list, high winds, and weather forecasts. Implemented near real-time mobile notifications to enhance operational awareness. Unity3D Virtual Reality Application: Created a VR application to assist in the design process of nautical bridge layouts, improving spatial planning and decision-making. Vessel Remote-Control Center: Participated in the development of a remote-control center for vessels, utilizing Rust, React, and Linux to ensure secure, efficient, and modern operational control.
Tech & Tools: iOS · React.js · Rust · AWS · C# · Docker · Unity3D · Python · Node.js · TypeScript · Microsoft Azure
Software Engineering Consultant
Qvik
On-site mobile consultant delivering iOS, Android, and React Native apps for clients across Finland. Translated business requirements into architecture recommendations and guided platform selection.
Project Highlights:
- Slush iOS Mobile app for browsing the event program and creating a schedule for the Slush Startup event.
- St1 Way fueling React Native app with Apple Pay and Mastercard integration, shipped to production in Finland and Sweden.
- Visma Severa work time tracker app built with Xamarin.
Tech & Tools: Swift · Objective-C · React Native · Android · Python · C#
Mobile Software Developer/Product Owner
Mobi Lab
Mobile Software Developer / Product Owner Developed custom iPhone and iPad applications to client specifications. Managed end-to-end product lifecycle activities, defined requirements with clients, and facilitated story mapping and retrospectives. Tech & Tools: iOS · Objective-C · Software Product Management · Android Project Highlights:
- Built Touchnote postcard app, which reached international markets across multiple App Store regions.
- HMA Pro VPN, iOS and Android VPN client.
- MarkIT, mobile app for retail inventory management.
- AirPatrole, iOS app for remotely controlling an air heating pump.
Industry Experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Energy, Manufacturing, Retail, Tourism, and Aerospace and Defense.
Business Area Experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, Research and Development, Project Management, Customer Service, and Quality Assurance.
Summary
Senior Software Engineer and Consultant with 15+ years of experience across Mobile and Full-Stack Web. I deliver production-ready software, lead technical decisions, and align engineering execution with business goals, working agentic-first with GitHub Copilot and LLM-assisted workflows.
Skills
- Ios (Swift, Swiftui)
- Android (Kotlin)
- React
- React Native
- Next.J
- Node.Js
- Python
- Unity 3d
- C#
- Aws
Languages
Education
Kristianstad University
Bachelor of Computer Science · Computer Science · Kristianstad, Sweden
Certifications & licenses
Professional Scrum Master (PSM I)
AWS Certified Cloud Practitioner
AWS
SAFe 4 Certified Agilist
Statistics
Experience
Global Experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
Similar Freelancers
Discover other experts with similar qualifications and experience
Christian Golecki
Jan Lüders
Manuel Reinfurt
Hüseyin Korkut
Adam Richter
Martin Wilhelmi
Ilker Baltaci
Jürgen Fey
Thomas Stägemann
Steven Mohr
Experts recently working on similar projects
Freelancers with hands-on experience in comparable project as a Mobile Software Developer (Android)
Steven Mohr
James Cullimore
Matthias Eymers
Yodgorbek Komilov
Ilker Baltaci
Ahmet Cavus
Adam Richter
Stefan Baust
Wolfram Rittmeyer
Ulrich Cech
Nearby freelancers
Professionals working in or nearby Tallinn, Estonia
Patrick Gerber
Kirill Kabatski
Joan Moreau
Burak Gücer
Carl Edvard Roland Tiik
Artjom Jegorov
Alexandre Plavinski
Jefferson Silva
Elisabeth Sau
Anna Boitsova
Most recent projects
FRATCH works with many companies and recruitment agencies. Here you will find our recently posted projects and opportunities.
