Tadej Slamic, Software Developer in Oslo, Norway
Tadej Slamic

Software Developer in Oslo, Norway

Member since July 10, 2019
With over a decade in the software industry, Tadej has helped startups launch their first product, assisted FTSE 100 enterprises with digital transformation, been a part of the fintech boom, and helped particle accelerators cool down. He loves creating scalable back ends and is an expert in crafting modern and performant mobile, web, and desktop apps.
Tadej is now available for hire


  • Enfunc
    Go, Java, JavaScript, TypeScript, Python, GraphQL, Android, iOS, React...
  • Shortcut
    Team Management, Technical Leadership, Leadership, Tech Sales, Public Speaking
  • Shortcut
    Python, Node.js, React, TypeScript, Swift, Kotlin, Java, Docker, Kubernetes...



Oslo, Norway



Preferred Environment

Unix, JetBrains, Git

The most amazing...

...project I've worked on went from zero to millions of users in a span of a year and won an internationally acclaimed award for the best app in its genre.


  • Principal Consultant

    2020 - PRESENT
    • Helped a fintech startup deliver an MVP, leading to a successful series A round and winning the award for the non-bank lender of the year.
    • Assisted a multinational pharmaceutical and biotechnology corporation with software streamlining the delivery of the COVID-19 vaccine.
    • Deployed numerous smart contracts to the Ethereum blockchain for a well-funded crypto startup with a current market cap of $7M and more than 50,000 transactions.
    Technologies: Go, Java, JavaScript, TypeScript, Python, GraphQL, Android, iOS, React, React Native, PostgreSQL, Firebase, Kubernetes, Terraform, Amazon Web Services (AWS), Google Cloud, Experian, Amazon Cognito, Node.js, Plaid, Stripe, fiserv, Ethereum, Web3.js
  • Chief Technology Officer

    2019 - 2022
    • Oversaw the engineering efforts and delivery, aligning tech strategy with company OKRs, ensuring modern practices, processes and tools were in place. Assisted leaders in other offices (Sweden, Denmark, Romania, Ukraine) adopt a similar MO.
    • Managed the technical hiring. Conducted 150+ technical interviews since joining.
    • Assisted with acquisitions, technical due diligence, and sales, resulting in an increase in monthly revenue and hourly rates across the engineering team.
    Technologies: Team Management, Technical Leadership, Leadership, Tech Sales, Public Speaking
  • Technical Lead

    2018 - 2019
    • Helped architect and develop an identity provider (IDP) for a multinational supermarket chain. We reduced the running cost, eliminated all legacy issues, and improved latency, crash reporting, and metrics. Used by 2 million people regularly.
    • Led the development of the app (Android and iOS) and back end for Scandinavia's largest haircut provider. Consolidating multiple services onto a single platform with a fluid API and scale. This helped the company expand across Europe with ease.
    • Held accountable for the technical output of teams working on Norway's most popular apps.
    Technologies: Python, Node.js, React, TypeScript, Swift, Kotlin, Java, Docker, Kubernetes, Google Cloud Platform (GCP), gRPC, Go, Technical Leadership, Technical Hiring, Leadership, Team Leadership, Team Management, Interviews, Interviewing, Mobile, Mobile APIs, Mobile Apps, Cloud, Google, Amazon Web Services (AWS), Heroku, Code Review, Open Source, Source Code Review, Presentations, Tech Sales, CTO
  • Engineering Lead

    2017 - 2018
    Lloyds Banking Group
    • Led a team of 10+ people responsible for the platinum journeys around payments and statements on the #1 UK banking app three years in a row.
    • Governed the adaption of a recent mobile acquisition onto our tech stack.
    • Engaged in technical debt burning, architecture, refactoring, and performance tuning of an app used by millions.
    • Performed code reviews across the whole mobile floor.
    Technologies: Jenkins, Gerrit, Behavior-driven Development (BDD), JavaScript, iOS, Android, Kotlin, Java, Interviews, Technical Hiring, Interviewing, Code Review, Open Source, Source Code Review, Team Management, Distributed Team Management, Offshore Team Management, Cucumber, Leadership, Agile, Mobile Banking, Online Banking, Fintech, Architecture, Web Architecture
  • Senior Software Consultant

    2016 - 2017
    • Acted as a technical architect for a major health care client to investigate how their web product can be transferred onto mobile platforms. Following my report, the client implemented the proposed solution.
    • Worked as the Android lead for the UK's largest postal service—leading the development of an app providing insight into employee operations, environment, and patterns that improved delivery predictions.
    • Reviewed an Android app of the largest UK-owned airport operator—resolving many memory/performance issues and bugs.
    Technologies: Xamarin, C#, JavaScript, iOS, Android, Kotlin, Code Review, Web, Interviews, Agile, Amazon Web Services (AWS), Python, Team Management
  • Senior Software Engineer

    2013 - 2016
    Full Tilt Poker / PokerStars
    • Spearheaded the full development lifecycle of the Full Tilt Poker Android app. Over a million downloads across multiple distribution systems in less than a year.
    • Achieved the IGA gaming app award for the Best Poker App of 2014.
    • Built parts of the app 2-20x faster. Introduced form-factor independent UI components with a notable increase in tablet use afterward.
    Technologies: C, C++, JavaScript, iOS, Android, Leadership
  • Software Engineer

    2013 - 2013
    Simplifydigital (now part of Currys)
    • Collaborated with the team creating the UK's first-ever energy switching app.
    • Helped decide the tech stack, design, coding guidelines, and CI/CD.
    • Involved in the API and database design and creation.
    Technologies: C#, Android, Agile
  • Software Engineer

    2012 - 2013
    Comtrade Group
    • Converted a hybrid app to a native Android app resulting in a noticeably improved performance, robustness, and look and feel.
    • Efficiently collaborated with teams across various geographic locations.
    Technologies: JavaScript, Cordova, PhoneGap, iOS, Objective-C, Android, Java
  • Software Engineer

    2011 - 2012
    THT NG
    • Implemented APIs and server-side features for various websites and portals.
    • Created a Facebook clone for an Italian poker community.
    • Developed an app displaying sports betting information across TV screens.
    Technologies: PHP, MooTools, Kohana, jQuery, Swing, Java, Django, Python
  • Intern

    2010 - 2010
    Deutsches Elektronen-Synchrotron (DESY)
    • Worked as a member of the Cryogenic Control Lab.
    • Helped develop a plugin for a particle accelerator control system responsible for monitoring the temperature and cooling procedures.
    Technologies: Eclipse RCP, Eclipse, SWT, Java


  • Learn Kotlin/Native

    Learn Kotlin/Native is a set of tutorials I created after many talks and presentations I did around the topic. Designed to get your feet wet, it helps you get started and finishes with an example of how to write code running on both Android and iOS.

  • Open Source Projects

    I’ve created many useful (and less useful) open-source projects across multiple technologies, ranging from gRPC, Go, golden files, dependency injection, cross-platform tools, tutorials, scripts, and more.

  • Lloyds Bank Mobile Banking

    Lloyds Bank mobile app is used by over 8 million people daily. It was the #1 UK banking app for three years in a row, according to Forrester. I was leading a team of 10+ people creating platinum journeys involving payments and statements.

  • Technical Writing

    I've written a series of blog posts about building and securing an imaginary API for a restaurant. The blogs showcase established practices in authentication and authorization, using Java, Spring Boot, and Auth0.


  • Languages

    Java, Go, Kotlin, Python, TypeScript, JavaScript, C#, HTML5, SQL, Swift, Objective-C, HTML, CSS, XML, YAML, Solidity, Ruby, Embedded C, C, C++, PHP, Bash, GraphQL
  • Frameworks

    Spring Boot, Spring, OAuth 2, JSON Web Tokens (JWT), Flask, Flutter, Express.js, gRPC, Swagger, .NET, Ruby on Rails (RoR), Angular, Bootstrap, Kohana, PhoneGap, Django, Swing, React Native, Storm, Hadoop, Spark
  • Libraries/APIs

    Experian, Yodlee API Interface, REST APIs, Node.js, API Development, Slack API, Stripe, RxJava 2, OpenID, MooTools, SWT, jQuery, React, Eclipse SWT, Stripe API, Facebook API, GitHub API, Twitter API, Google Places API, Google Play API, Web3.js
  • Tools

    Firebase Cloud Messaging (FCM), Git, Make, IntelliJ, GitHub, Auth0, Google Analytics, Gradle, Maven, Fastlane, Terraform, IntelliJ IDEA, Android Studio, Xcode, Gerrit, JetBrains, Shell, Jenkins, Sonar, Eclipse RCP, Cucumber, Jira, Visual Studio App Center, Amazon Cognito, Plaid
  • Paradigms

    Automation, App Development, RESTful Development, REST, Clean Architecture, Scalable Application, Dependency Injection, Agile, Functional Programming, Microservices, Reactive Programming, Continuous Delivery (CD), Continuous Integration (CI), Event-driven Architecture, Test-driven Development (TDD), Unit Testing, Web Architecture, Web Application Architecture, Serverless Architecture, Continuous Deployment, Behavior-driven Development (BDD), Cross-platform, Testing, MapReduce, DevOps
  • Platforms

    AWS Lambda, Mobile, Android, Firebase, Google Cloud Platform (GCP), Twilio, iOS, Xamarin, Docker, Amazon Web Services (AWS), Ethereum, Azure, Kubernetes, Eclipse, Apache Kafka, Unix, Blockchain, Heroku, Web
  • Storage

    JSON, PostgreSQL, Memcached, Databases, NoSQL, Redis, Realm, MySQL, Cloud Firestore, Google Cloud, Elasticsearch, PL/SQL, MongoDB
  • Industry Expertise

    Banking & Finance
  • Other

    Software Development, Blockchain Development, Back-end, APIs, Authentication, Technology, Technical Leadership, SOAP, Minimum Viable Product (MVP), Mobile Architecture, Middleware, Software as a Service (SaaS), CTO, Fintech, Mobile Apps, Mobile APIs, Containerization, Containers, Software Architecture, Writing & Editing, Stripe Payments, Planning, Back-end Development, Firebase Cloud Functions, Data Scraping, Payment APIs, SOLID Principles, Open Source, Communication, Leadership, Architecture, Web Scraping, Mentorship & Coaching, Native Mobile Apps, Web Development, Full-stack, Team Management, Distributed Team Management, Technical Hiring, Interviews, Interviewing, Code Review, Source Code Review, Push Notifications, Scripting, SaaS, API Integration, Integration Testing, System Integration Testing (SIT), OAuth, CI/CD Pipelines, System Architecture, Progressive Web Applications (PWA), Cloud Services, Consul, Financial Services, WebSockets, FindBugs, Google Cloud Functions, Cloud, Serverless, Protocol Buffers, Algorithms, Data Structures, Analytics, User Experience (UX), Concurrency, Trading, Mathematics, Software, Cordova, Kotlin/Native, Mobile Banking, Machine Learning, Big Data, Offshore Team Management, Online Banking, Team Leadership, Google, Presentations, Tech Sales, Public Speaking, Technical Writing, fiserv


  • Completed Credits towards a Bachelor's Degree in Mathematics and Computer Science
    2007 - 2010
    University of Ljubljana - Ljubljana, Slovenia

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