Cutshort logo
Full Stack Fitness Brand logo
Android Developer
Full Stack Fitness Brand
Android Developer
Full Stack Fitness Brand's logo

Android Developer

at Full Stack Fitness Brand

Agency job
via Unnati
5 - 7 yrs
₹10L - ₹12L / yr
Delhi, Gurugram, Noida
Skills
skill iconAndroid Development
skill iconKotlin
skill iconJava
Model-View-View-Model (MVVM)
MVP
skill iconFlutter
Algorithms
SQLite
Firebase
Debugging
Data Structures
Scalability
coding
Are you looking to join a team which is young, super talented & damn cool. A supportive group of professionals that believes in doing things the right way. Then the below opportunity is for you:

Our client is a full stack fitness and lifestyle brand and is Indias largest app that is making fitness affordable, accessible and enjoyable through technology, data and intelligence. Available on iOS and Android, this app allows subscribers to work out at anywhere, anytime, and chose from a variety of available workout options like: gym workouts, yoga, Zumba, Pilates, spinning, kickboxing, CrossFit, and MMA. It gives access to 3000+ top gyms and fitness studios, fitness coaching plans and personal nutrition assistance and more in Ahmedabad, Bengaluru, Delhi-NCR, Hyderabad, Jaipur, Mumbai, Pune.

Founded in 2015 by a CII member and serial entrepreneur, our client is democratizing and digitizing the Indian health & fitness ecosystem by offering workouts close to your home, office or your favorite neighborhood.

As a Android Developer, you will collaborate effectively with cross-functional teams such as Product Management, Business Development, and Operations, and use all your expertise to ensure superior solutions to match our scale of operations.

What you will do:
  • Developing apps and building exceptional products
  • Working in a cross-functional and collaborative environment using cutting edge technologies that continuously drive innovation forward
  • Being part of a team of highly skilled and passionate people across multiple time zones
  • Owning code quality and experience in writing extensive unit tests
  • Ensuring that the development is leveraging common methods and best practices.
  • Handling Code Reviews, Setup guidelines for Development.
  • Enforcing consistent development patterns and security architecture.
  • Carrying out A/B testing and be data-driven while approaching solutions to problems.
  • Creating working prototypes and proof of concepts at tech scoping stage to demonstrate the feasibility.
 

What you need to have:

  • Bachelors/ Masters degree in computer science, Engineering or a related subject
  • Minimum of 5 years of work experience in mobile application development
  • Proficiency in Problem Solving, Data Structures, and Algorithms
  • Strong knowledge of design concepts and constraints on mobile platforms
  • Proficiency in Java/ Android/ Excellent in Kotlin & Flutter language
  • Demonstrable experience building excellent mobile apps that are currently in Google PlayStore
  • MVP/ MVVM architecture
  • Firebase services
  • Local databases (SQLite, firebase DB)/ORM (Green DAO, Room)
  • Experience with a scalable architecture, while maintaining a hands-on role with code development
  • Excellent teamwork skills, flexibility, and ability to handle multiple tasks
  • Excellent analytical, problem-solving skills and Setting & following targets and timelines
  • High proficiency in Android frameworks and core components
  • Bug fixing
Read more
Users love Cutshort
Read about what our users have to say about finding their next opportunity on Cutshort.
Shubham Vishwakarma's profile image

Shubham Vishwakarma

Full Stack Developer - Averlon
I had an amazing experience. It was a delight getting interviewed via Cutshort. The entire end to end process was amazing. I would like to mention Reshika, she was just amazing wrt guiding me through the process. Thank you team.
Companies hiring on Cutshort
companies logos

Similar jobs

Loyalty Juggernaut Inc
at Loyalty Juggernaut Inc
2 recruiters
Shraddha Dhavle
Posted by Shraddha Dhavle
Hyderabad
2 - 5 yrs
₹6L - ₹15L / yr
skill iconAndroid Development
skill iconKotlin
skill iconJava
Mobile App Development
Android Sdk
+1 more

yalty Juggernaut Inc. (LJI) is a Silicon Valley-based product company, founded by industry veterans with decades of expertise in CRM, Loyalty, and Mobile AdTech. With a global footprint spanning the USA, Europe, UAE, India, and Latin America, we are trusted partners for customer centric enterprises across diverse industries including Airlines, Airport, Retail, Hospitality, Banking, F&B, Telecom, Insurance and Ecosystem.

As pioneers in next-generation loyalty and customer engagement solutions, we are not just transforming loyalty—we are redefining it. With a passion for innovation and a commitment to excellence, LJI is reshaping the loyalty landscape, enabling enterprises to create meaningful, long-lasting relationships with their customers. We are THE JUGGERNAUTS, driving innovation and impact in the loyalty ecosystem.

At the core of our innovation is GRAVTY®, a revolutionary Digital Transformation SaaS Product that empowers multinational enterprises to build deeper customer connections. Designed for scalability and personalization, GRAVTY® delivers cutting-edge loyalty solutions that transform customer engagement across diverse markets.


Our Impact:

  • 400+ million members connected through our platform.
  • Trusted by 100+ global brands/partners, driving loyalty and brand devotion worldwide.

Proud to be a Three-Time Champion for Best Technology Innovation in Loyalty!!


Explore more about us at www.lji.io.


We are seeking an experienced and highly- skilled Android Developer to join the Mobile Apps development team at our Hyderabad Office. As a Android Developer, you will play a pivotal role in developing, implementing, and managing high-quality, robust, and scalable mobile applications on the Android platform.


What you will OWN:

  • Develop and maintain high-performance, scalable Android applications using Kotlin. Architect and implement features following MVVM/MVI architecture.
  • Ensure high performance and responsiveness of the application.
  • Follow MVVM architecture and write clean, maintainable code.
  • Debug and fix issues, improving app stability and performance.
  • Work with CI/CD tools to streamline development and deployment.
  • Stay updated with the latest Android development trends and best practices.
  • Work with Jetpack Components (ViewModel, LiveData, Room, Navigation, WorkManager, etc.).
  • Integrate and optimize RESTful APIs and GraphQL services.
  • Implement push notifications (FCM), deep linking, and in-app messaging.
  • Optimize app performance by analyzing memory usage, network calls, and UI rendering.
  • Work with CI/CD tools to streamline the release process.
  • Ensure Unit Testing & UI Testing using JUnit, Mockito, Espresso.
  • Collaborate with designers, backend engineers, and product managers to ensure smooth product delivery.
  • Stay updated with the latest Android trends and best practices.
  • Research and integrate new SDKs, APIs, and third-party services effectively without issues.



You will make a GREAT FIT if you are from Hyderabad and if you have:

  • Bachelor's degree in Computer Science, Information Technology, or related field.
  • 0-4 years of hands-on experience in Android development
  • Strong knowledge of Java/Kotlin and Android SDK.
  • Familiarity with Android Studio, Gradle, and Firebase.
  • Strong OOP and programming concepts.
  • Extensive experience with Android Frameworks such as Jetpack components and Android Architecture Components. (Navigation, WorkManager, Dependency injection with Dagger-Hilt and etc).
  • Solid understanding of Multi-threading (Coroutines/RxJava).
  • Knowledge of Material Design principles & UI/UX best practices.Optimize app performance by analyzing memory usage, network calls, and UI rendering.
  • Familiarity with Git/GitHub for version control
  • Understanding of Agile/Scrum development methodologies.
  • Strong research capability to implement and troubleshoot new SDKs or integrations efficiently.
  • Experience with RESTful APIs and third-party integrations.


Bonus Skills:

  • Experience with Jetpack Compose.
  • Knowledge of modularization & clean architecture.
  • Exposure to Firebase (Crashlytics, Analytics, Firestore, Remote Config).
  • Understanding of A/B Testing & Feature Flagging.
  • Experience with third-party SDKs & analytics tools (Amplitude, Mixpanel, Segment, etc.).
  • Knowledge of Flutter development to contribute to cross-platform apps when needed.


Why Choose US?

  • This opportunity offers a dynamic and supportive work environment where you'll have the chance to not just collaborate with talented technocrats but also work with globally recognized brands, gain exposure, and carve your own career path.
  • You will get to innovate and dabble in the future of technology -Enterprise Cloud Computing, Blockchain, Machine Learning, AI, Mobile, Digital Wallets, and much more.


Unlock this opportunity soon by applying for this position.

Read more
IGLOBAL IMPACT ITES PVT. LTD.
Durgapur, West Bengal
2.5 - 4 yrs
₹3L - ₹5.5L / yr
Mobile applications
DART
skill iconFlutter
Software Development
RESTful APIs
+1 more

Flutter JD:

Key Responsibilities: Collaborate with project managers and designers to understand project requirements and translate them into technical specifications.

Develop, test, and maintain Flutter-based mobile applications that are responsive, performant, and reliable.

Write clean, maintainable, and well-documented code.

Troubleshoot and debug application issues, ensuring smooth and efficient performance.

Continuously research and stay up-to-date with the latest trends and best practices in mobile application development.

Collaborate with cross-functional teams to define and implement new features and improvements.

Participate in code reviews and provide constructive feedback to peers.

Ensure the security and data privacy of the applications you develop.

Requirements:

Proven experience as a mobile app developer, with a strong portfolio of Flutter-based applications.

Proficiency in the Dart programming language.

Experience with the Flutter framework and its ecosystem, including state management and third-party libraries.

Knowledge of mobile app architecture patterns (e.g., MVC, MVVM, Redux).

Familiarity with RESTful APIs and integration of third-party services.

Strong problem-solving and debugging skills.

Excellent communication and collaboration skills.

Ability to work both independently and as part of a team.

Knowledge of version control systems (e.g., Git) is a plus.

Read more
RS Consultants
at RS Consultants
2 candid answers
2 recruiters
Biswadeep RS
Posted by Biswadeep RS
Bengaluru (Bangalore)
2 - 4 yrs
₹10L - ₹15L / yr
skill iconAndroid Development
RxJava
skill iconKotlin
skill iconJava
Model-View-View-Model (MVVM)
+1 more

Position: Android Developer – SD II

Organization:  A Funded global healthcare platform connecting doctors, thereby enabling exchange of information on a quick and real time basis, founded in the year 2013.Currently there are 3 lakh doctors using this platform and everyday there are 400 new doctors joining it.A Funded global healthcare platform connecting doctors, thereby enabling exchange of information on a quick and real time basis, founded in the year 2013.Currently there are 3 lakh doctors using this platform and everyday there are 400 new doctors joining it.

The platform promotes exchange of viewpoints, ideas, and information on various medical practices amongst healthcare professionals. This saves both time and money as solutions to several health issues can be accessed on a real time basis. There are 1.3 million registered doctors and 400+ daily publications on its platform and they operate across 16+countries.

 

Location: Bangalore (Currently Remote, Later you need to relocate)

 

Roles & Responsibilities

You’re Awesome At -

  • Native Android App development (Preferably for a B2C Product)
  • Proficiency in various algorithms and data structures.
  • Proficiency in Kotlin with at least 1 year of experience in Kotlin.
  • Good knowledge of Coroutines, RxJava and JetPack components. JetPack Compose is a bonus.
  • Strong experience with REST APIs (Retrofit), storage databases, multi-threading, performance, and memory tuning.
  • Deep understanding of android architecture such as MVP and MVVM

 

Your Academic Qualifications -

BE / BTech in Computer Science preferred. However, if you have good hands-on knowledge of building Android apps, that’s what we are looking for!

You’ll Be Improving & Responsible For –

  • A team that is building products used by 300k + doctors every single day.
  • Work on Petabyte Scale Streaming Systems - more than 500 million hours of video has been streamed.
  • Lead high volume VOD streaming (think of systems as sophisticated as Netflix and Amazon prime).
  • Challenge oneself on Security, Scalability and Stability
  • Maintain code and write automated tests to ensure the product is of the highest quality.
  • Reach out to the open-source community to encourage and help implement mission-critical software fixes

 

Your Experience Across the Years in the Roles You’ve Played -

2-4 years

Good to have:

  • Experience in a test-driven environment
  • Application built using Jetpack Components.
  • In depth knowledge of handling database and db migration.
  • Passion for product quality and attention to details.
Read more
Daotless
at Daotless
1 recruiter
Arko C
Posted by Arko C
Kolkata
0 - 7 yrs
₹5L - ₹20L / yr
skill iconSwift
skill iconObjective C
skill iconiOS App Development
Xcode
Model-View-View-Model (MVVM)
+1 more
  • Excellent working knowledge of OOPs, SOLID principles and different design patterns.
  • Solid hands on experience and deep understanding of different architectures.
  • Solid working knowledge of Objective C and Swift, iOS application development and iOS fundamentals.
  • Proficient with general swift language features, collections, protocol oriented programming, etc.
  • Hands on experience of implementing architecture patterns and designing/implementing unit test cases using XCTest & other third party libraries.
  • Solid working experience of debugging, profiling tools, developer portal and App Store release process.
  • Excellent analytical and problem solving skills.
Read more
Fyp
at Fyp
7 recruiters
Yagyarth Srivastava
Posted by Yagyarth Srivastava
Gurugram
3 - 5 yrs
₹7L - ₹9L / yr
skill iconiOS App Development
skill iconObjective C
skill iconSwift
Xcode
Model-View-View-Model (MVVM)
+2 more

Responsibilities: 

  • Work with an open-source iOS ecosystem and the libraries available for common tasks. 
  • Work directly with developers and product managers to conceptualize, build, test and realize products.  
  • Build reusable iOS software components for the platform.  
  • Unit-test code for robustness, including edge cases, usability, and general reliability.   
  • Work on bug fixing to improve application performance and shipping new features as required 
     

  Requirements:  

  • Experience with iOS Design patterns, memory management, REST web-services and JSON Parsing. Designing and building advanced applications for the iOS platform 
  •  Collaborating with cross-functional teams to define, design, and ship new features 
  • Design and build advanced applications for the iOS platform  
  • Work on bug fixing and improving application performance  
  • Can integrate apps with backend and 3rd party API’s. 
  • Good programming skills in Objective-C/Swift and extensive knowledge of Apples SDKs and frameworks like Core Data, Core Graphics, Foundation, UIKit, etc.  
  • Have published one or more applications in an iOS App Store. 
  • Knowledge of iOS App Store deployment process. 
Read more
FrontRow
FrontRow
Agency job
via Asvatthah by Surendhar D
Bengaluru (Bangalore)
2 - 4 yrs
₹5L - ₹20L / yr
skill iconFlutter
skill iconJava
skill iconKotlin
skill iconAndroid Development
What you can look forward to:
● We provide a platform for you to grow exponentially along with the organisation.
● Grow with a team having strong foundations in software engineering practices.
● First-hand experience with a wide range of technologies that work at scale.
● Your role is not just subjected to coding , you will be involved in the end to end product phase from ideation to the product going live.
● Our focus is not from which tier 1 college you come from rather it is the skills/competencies you have and the progression you have shown in your career graph.
● Learn in an environment passionate about knowledge-sharing.
● Have a pivotal role in the transformation of our engineering culture.

Responsibilities:

● Work closely with our product and design teams to customize the user experience.
● Design components by translating product requirements, break down projects into tasks and provide accurate estimates. Build scalable and reliable technology solutions at a rapid pace.
● Prototype new and redesign features.
● A focus on UI design principles and making apps work intuitively.
● Strong coding abilities and experience with Dart.
● Actively participate in design and code reviews to build robust applications and prototypes.
● A willingness to dive deep, experiment rapidly and get things done.
● Understanding of object-oriented software development.
● Prior experience in working with social apps is a plus.
● Experience in working with machine learning applications, hardware features is a plus.
● Prior product building experience or from a startup background would be a plus.
Read more
upGrad
at upGrad
1 video
19 recruiters
Priyanka Muralidharan
Posted by Priyanka Muralidharan
Bengaluru (Bangalore), Mumbai
6 - 9 yrs
₹26L - ₹36L / yr
skill iconKotlin
skill iconAndroid Development
skill iconJava
Model-View-View-Model (MVVM)
Data Structures

About the Role

As an Android Developer, you will own the Android app and strive to deliver the best learning experience out there to our learners that upGrad is known for. You will be responsible for developing features, taking those features to production and maintaining the existing code. Innovative nature and pro-active involvement in the product is taken very seriously at upGrad, therefore, a major part of your role would involve thinking about new features and new ways to deliver quality learning experience to our learners

Skills/Experience

  1. Minimum 6+ years of hands-on Android development experience.
  2. Strong Java and object-oriented concepts.
  3. Solid understanding of Android architectural patterns especially MVVM and their importance in scalable software development process.
  4. Strong understanding of Android fundamentals.
  5. Experience in Android UI creation.
  6. Experience of Android Live Data, Kotlin and Constraint layout would be a huge plus point.

Years of Exp –  Minimum 6-8 

Read more
upGrad
at upGrad
1 video
19 recruiters
Priyanka Muralidharan
Posted by Priyanka Muralidharan
Bengaluru (Bangalore), Mumbai
4 - 7 yrs
₹16L - ₹26L / yr
skill iconiOS App Development
skill iconSwift
skill iconObjective C
Model-View-View-Model (MVVM)
Xcode
+1 more

About the Role

We, at upGrad, believe in giving ownership and responsibility to each one of the team members. As an iOS Developer, you will be a part of the iOS app development team and strive to deliver the best learning experience out there to our learners that upGrad is known for. You will be responsible for developing features, taking those features to production and maintaining the existing code.

Innovative nature and pro-active involvement in the product is taken very seriously at upGrad, therefore, a major part of your role would involve thinking about new features and new ways to deliver quality learning experience to our learners.

Roles & Responsibilities

  • Own end to end development and operations of high-performance software development team.
  • Design the architecture and deliver clean, testable, and scalable code 
  • Participate in requirement gathering and display a strong sense of ownership and delivery 
  • Maintain high standards of software quality within the team by
  • Participating in regular peer-reviews of solution designs and related code 
  • Provide technical leadership to teammates through coaching and mentorship.

Skills Required

  • Minimum 6 years of strong iOS development experience with at least 2 Apps Published on App Store of Enterprise Platform.
  • Strong Swift concepts along with OOPS, Computer Science fundamentals, Memory Management, App Profiling experience.
  • In depth understanding of frameworks like UIKit, Foundation classes, AutoLayout, Core Data, Networking, Collections, GCD, ARC.
  • Solid understanding to write modular code, template based programming which is Unit testable (Critical Requirement)
  • Solid understanding of iOS architectural patterns especially VIPER (and MVVM) and their importance in scalable software development process.
  • Prior understanding of Git (must have), JIRA, Trello, Confluence, etc
  • Experience in iOS UI creation using Storyboards, XIB and Code.
  • Experience with standard libraries like RxSwift, Swinject, Alamofire, etc.
  • Good written and verbal communication.
  • Ability to collaborate with multiple teams to work on different phases of the project.
  • Knowledge about App Store, publishing an app and the common rejection reasons.

 

Read more
Zapit
at Zapit
1 recruiter
Romit G
Posted by Romit G
Remote only
1.5 - 3 yrs
₹9L - ₹12L / yr
skill iconFlutter
DART
Payments
Wallet (Blockchain)
Mobile App Development
+3 more

About us:

Zapit aims to be a multi-platform single app solution for universal payments using blockchain technology. Our goal is to spread economic freedom by pushing the boundaries of p2p payments by introducing non-custodial decentralised financial services.

 

We are looking to build smart contracts that can be deployed for real world use cases such as insurances, loans and other useful decentralised financial products. We are also working towards building an economy where concepts like company shares, gift cards, discount coupons, loyalty points and more can be tokenised including NFTs in the form of art, music, gaming items, event tickets, design concepts and more.

 

Responsibilities:

  • Collaborate with designers to develop a visually appealing, responsive & optimised app for mobile, web & desktop platforms.
  • Use Flutter framework to develop great user experiences with effective workflows.
  • Build reusable code and robust libraries of UI components.
  • Write clean, maintainable and documented code with solid test coverage.
  • Participate in the product roadmap discussions.
  • Design, develop, test, deploy, maintain, scale and improve code base.
  • Implement methods to understand user interaction and engagement on the product through metrics.

 

Requirements:

  • Minimum experience of 1.5 years in Dart/Flutter development with a good knowledge of native Android & iOS development.
  • Good understanding of Data Structures and Algorithms.
  • Passionate and opinionated about beautiful design with an eye for detail.
  • Should be updated with latest front end technologies and trends.
  • Proficient knowledge of cross-browser compatibility issues and handle graceful degradation.
  • Should have delivered multiple products.
  • Interest in building things from scratch.
  • Willingness and affinity to learn.
  • Excellent communication skills.
  • Self-motivated, work well independently or as part of the team.

 

Our Stack:

We tend to work with Javascript, Typescript, Dart, Flutter, gRPC, Express.js, Heroku, NodeJS, MongoDB, AWS, Solidity, Bitcoin Script.

 

Good-to-Have:

  • Open Source contributions.
  • Interest in Cryptocurrency/Payments space.
  • Familiar with Git and GitHub/GitLab

 

Incentives:

  • Equity in the company
  • Get to work in a distributed team.
  • Handsome pay. (Competitive)
  • Fast opportunities for personal and professional learning and growth, tons of autonomy and responsibility, results-driven environment, international team, exposure to a wide array of ecosystems and trailblazing technology, flexible work hours.

Please include something beautiful you’ve implemented in the past if possible!

If you have examples of a project where you iterated after learning new things from potential users, please talk about that!

Read more
Indus OS
at Indus OS
1 video
2 recruiters
Gunjan Rastogi
Posted by Gunjan Rastogi
Noida, NCR (Delhi | Gurgaon | Noida)
2 - 5 yrs
₹10L - ₹18L / yr
skill iconAndroid Development
Android Developer
skill iconJava
android
skill iconKotlin

Roles & Responsibilities

  • You’ll be actively involved with and monitor the development of OS stack and firmware.
  • You’ll be architecting and implementing best-in-class ‘real-time’ OS to power mobile phones in the market.
  • You’ll be responsible for designing, implementation & maintenance of various embedded components and applications for mobile platforms.
  • Communicate often & effectively about the status of new & ongoing development efforts within the company.
  • Represent the OS engineering team at high-level meetings.
  • Motivate, mentor and lead other team members by rolling up your sleeves and offering technical and project management insights and tips.
  • Work closely with the design team to create exciting mobile user experiences as per the modern standard.
  • You’ll be continuously keeping an eye on the latest cutting-edge Android technologies and leveraging these in one’s own and the team’s work as necessary.

Desired Candidates Profile:

  • Experience in Android and OS firmware-based development for commercial consumer mobile phones.
  • Embedded system programming and board bring up.
  • System programming & OS internal skills.
  • Strong Command over Java, C/C++
  • Strong problem-solving skills.
  • Strong knowledge of the Android build system.
  • Android internal frameworks and device driver development expertise.
  • Experience of working with core Android libraries like bionic, stagefright, etc.
  • Cares about design & Very strong command of efficient layouts, including optimization for various mobile environments.
  • Knowledgeable about caching mechanisms & tools like In-Memory cache.
  • Experience of working with version control, bug tracking, continuous integration and other productivity enhancements software like Git, SVN, Bugzilla, Jira, etc.
  • Passionate about software development & modern-day Android OS technologies like:
  • Latest chipsets, GPUs, etc
  • Latest releases from chipset companies like Spreadtrum, Mediatek, Qualcomm
  • Android Lollipop
  • Phonebloks
  • LTE
  • The ability to effectively manage technical people (internal & external development resources) and projects.
  • Taking responsibility and ownership in the team’s work.
  • 1+ years of work experience.

Additional Requirements:

  • B.Tech/BS/BE/BS/MS/M.Tech/MS in Electronics or Computer Science from a premier institute in India (IITs, BITS, NITs, etc) or abroad.
Read more
Why apply to jobs via Cutshort
people_solving_puzzle
Personalized job matches
Stop wasting time. Get matched with jobs that meet your skills, aspirations and preferences.
people_verifying_people
Verified hiring teams
See actual hiring teams, find common social connections or connect with them directly. No 3rd party agencies here.
ai_chip
Move faster with AI
We use AI to get you faster responses, recommendations and unmatched user experience.
21,01,133
Matches delivered
37,12,187
Network size
15,000
Companies hiring
Did not find a job you were looking for?
icon
Search for relevant jobs from 10000+ companies such as Google, Amazon & Uber actively hiring on Cutshort.
companies logo
companies logo
companies logo
companies logo
companies logo
Get to hear about interesting companies hiring right now
Company logo
Company logo
Company logo
Company logo
Company logo
Linkedin iconFollow Cutshort
Users love Cutshort
Read about what our users have to say about finding their next opportunity on Cutshort.
Shubham Vishwakarma's profile image

Shubham Vishwakarma

Full Stack Developer - Averlon
I had an amazing experience. It was a delight getting interviewed via Cutshort. The entire end to end process was amazing. I would like to mention Reshika, she was just amazing wrt guiding me through the process. Thank you team.
Companies hiring on Cutshort
companies logos