Cutshort logo
Travelxp India Pvt Ltd logo
dotNet Developer
Travelxp India Pvt Ltd's logo

dotNet Developer

Himanshu Rawat's profile picture
Posted by Himanshu Rawat
1 - 3 yrs
₹3L - ₹8L / yr
Mumbai, India
Skills
skill icon.NET
dotnet
DOT
skill iconC#
skill iconAmazon Web Services (AWS)
skill iconMongoDB
SQL
Web API
Microservices
Architecture
Design patterns
We are searching for an organized, ambitious .NET developer with hands-on experience in data management methods with MongoDB, SQL.

In this role, you should be able to write functional code with a sharp eye for spotting defects. You should be a team player and an excellent communicator. If you are also passionate about the .NET framework and software design/architecture, we- d like to meet you.

Your goal will be to work with internal teams to design, develop and maintain software.

Responsibilities and Duties :

- Writing clean, scalable code using .NET programming languages.

- Build high-quality scalable and predictable web applications on the .NET Technology stack and maintain internal and external facing web applications.

- Creating and integrating services and APIs using Web API 2 for various products and applications.

- Working on system architecture and databasing in MongoDB, MySQL, and NoSQL.

- Make regular modifications to existing software for error correction, adaptation to new hardware, and improving overall function and performance

- Evaluate new code for reliable architecture, stability, reusability, performance, automation, security, and metrics

- Using JSON to store and transport data.

- Working with other team members and the team lead using Project Management Tools and Version Source Control to create industry-leading technological products.

Skills required:

- 1 - 3 years of experience in MongoDB.

- Knowledge about AWS Cloud is an added advantage.

- Knowledge of .NET development and lifecycle methods in C# Language.

- Experience in making Web API 2 including routes, class components, async methods, parallel programming, authentication, and authorization, etc.

- Experience and hands-on knowledge of data management methods with MongoDB, MySQL, or NoSQL, etc.

- Should have experience and understanding of using JSON.

- Familiarity with working with .NET Framework, JavaScript, HTML. Knowledge of .NET Core is preferred.

- Knowledge and experience working with AWS Cloud and cloud computing techniques is an added advantage, but not a requirement.

- Having a BSc Degree in Computer Science is optional but should have some educational knowledge of computer science.
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

About Travelxp India Pvt Ltd

Founded :
2011
Type :
Products & Services
Size :
100-1000
Stage :
Bootstrapped

About

Travelxp, world's leading travel channel is filmed in over 60 countries with 100% exclusive content and distributed in 40+ countries reaching over 100+ million homes.
Read more

Connect with the team

Profile picture
Sujay Bane
Profile picture
Himanshu Rawat

Company social profiles

N/A

Similar jobs

BigRio
Disha Bhardwaj
Posted by Disha Bhardwaj
Remote only
5 - 12 yrs
₹35L - ₹38L / yr
skill icon.NET
skill iconC#
CI/CD
skill iconKubernetes
Terraform
+3 more

Key Responsibilities:

●    Software Development: Iteratively and incrementally design, develop, test and maintain applications and services using C# and .NET.

●    CI/CD Pipelines: Develop, maintain, and optimize continuous integration and continuous delivery pipelines using GitLab, Devtron and Kubernetes.

●    Teamwork and Pair/Mob Programming: Engage with developers, operations, and team members via pair or mob programming sessions to ensure the highest quality product delivery.

●    Containerization: Contribute to the push toward full containerization and zero-downtime deployment goals

●    DevOps Practices: Implement and maintain infrastructure as code (IaC) using tools such as bicep and Terraform.

●    Monitoring and Logging: Implement and manage monitoring, logging, and alerting solutions using tools like OpenTelemetry, Prometheus, Grafana to make our products more supportable.

●    Design and Architecture: Contribute to on-going discussion of our evolving software design and architecture.

●    Cloud Management: Assist in managing and optimizing our private cloud infrastructure (VMWare Tanzu) to ensure high availability, scalability, and efficient resource usage.

●    Security: Implement security best practices and ensure compliance with relevant regulations and standards.

●    Automation: Identify opportunities for automation to improve efficiency, reduce manual efforts and deskilling in deployment, testing and maintenance tasks.

●    Troubleshooting: Diagnose and resolve infrastructure and application issues promptly and effectively.

●    Documentation: Create and maintain comprehensive documentation for applications, infrastructure, processes, and procedures.

●    Continuous Improvement: Advocate for and implement best practices promoting a culture of continuous improvement.

Qualifications:

Minimum of 5 years of experience in software development, particularly with C# and .NET.

Must have skills:

●    Strong knowledge of C# programming language and .NET stack

●    Familiarity with CI/CD tools and practices, including TDD.

●    Understanding of DevOps principles

●    Strong collaboration and communication skills.

Nice to have skills

●    Familiarity with containerization and orchestration tools like Docker and Kubernetes is a plus.

●    Knowledge of infrastructure as code (IaC).

●    Experience in scripting languages such as Python, Bash, or PowerShell is a bonus.

●    Excellent problem-solving skills and attention to detail.

●    Experience with pair/mob programming.

●    Understanding of networking concepts and security best practices.

Read more
Foto Owl AI
Pune
1 - 3 yrs
₹5L - ₹6L / yr
SQL
skill iconPython
skill iconDocker
RESTful APIs
FastAPI
+2 more

🚀 We’re Hiring: Senior Python Backend Developer 🚀


📍 Location: Baner, Pune (Work from Office)

💰 Compensation: ₹6 LPA

🕑 Experience Required: Minimum 2 years as a Python Backend Developer



About Us

Foto Owl AI is a fast-growing product-based company headquartered in Baner, Pune.


We specialize in:

⚡ Hyper-personalized fan engagement

🤖 AI-powered real-time photo sharing

📸 Advanced media asset management



What You’ll Do


As a Senior Python Backend Developer, you’ll play a key role in designing, building, and deploying scalable backend systems that power our cutting-edge platforms.


Architect and develop complex, secure, and scalable backend services

Build and maintain APIs & data pipelines for web, mobile, and AI-driven platforms

Optimize SQL & NoSQL databases for high performance

Manage AWS infrastructure (EC2, S3, RDS, Lambda, CloudWatch, etc.)

Implement observability, monitoring, and security best practices

Collaborate cross-functionally with product & AI teams

Mentor junior developers and conduct code reviews

Troubleshoot and resolve production issues with efficiency



What We’re Looking For


✅ Strong expertise in Python backend development

✅ Solid knowledge of Data Structures & Algorithms

✅ Hands-on experience with SQL (PostgreSQL/MySQL) and NoSQL (MongoDB, Redis, etc.)

✅ Proficiency in RESTful APIs & Microservice design

✅ Knowledge of Docker, Kubernetes, and cloud-native systems

✅ Experience managing AWS-based deployments



Why Join Us?


At Foto Owl AI, you’ll be part of a passionate team building world-class media tech products used in sports, events, and fan engagement platforms. If you love scalable backend systems, real-time challenges, and AI-driven products, this is the place for you.

Read more
Molecular Connections
at Molecular Connections
4 recruiters
Molecular Connections
Posted by Molecular Connections
Remote, Bengaluru (Bangalore), Mumbai
5 - 10 yrs
₹7L - ₹15L / yr
skill iconGo Programming (Golang)
skill iconRuby on Rails (ROR)
skill iconRuby
skill iconPython
skill iconJava
+8 more

Responsibilities:

- Design, develop, and implement robust and efficient backend services using microservices architecture principles.

-  Write clean, maintainable, and well-documented code using C# and the .NET framework.

-  Develop and implement data access layers using Entity Framework.

-  Utilize Azure DevOps for version control, continuous integration, and continuous delivery (CI/CD) pipelines.

-  Design and manage databases on Azure SQL.

-  Perform code reviews and participate in pair programming to ensure code quality.

-  Troubleshoot and debug complex backend issues.

-  Optimize backend performance and scalability to ensure a smooth user experience.

-  Stay up-to-date with the latest advancements in backend technologies and cloud platforms.

-  Collaborate effectively with frontend developers, product managers, and other stakeholders.

-  Clearly communicate technical concepts to both technical and non-technical audiences.

Qualifications:

-  Strong understanding of microservices architecture principles and best practices.

-  In-depth knowledge of C# programming language and the .NET framework (ASP.NET MVC/Core, Web API).

-  Experience working with Entity Framework for data access.

-  Proficiency with Azure DevOps for CI/CD pipelines and version control (Git).

-  Experience with Azure SQL for database design and management.

-  Experience with unit testing and integration testing methodologies.

-  Excellent problem-solving and analytical skills.

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

-   Strong written and verbal communication skills.

-   A passion for building high-quality, scalable, and secure software applications.

Read more
BlackLight Studio Works Pvt Ltd
Julli Sharma
Posted by Julli Sharma
Delhi, Gurugram, Noida, Ghaziabad, Faridabad
3 - 7 yrs
₹6L - ₹12L / yr
skill iconNodeJS (Node.js)
skill iconMongoDB
Mongoose
skill iconExpress

About Us:

We are BlackLight Games; we bring culturally relevant synchronous multiplayer games experience to mobile. Our games have been rocking the Play Stores since launch. We have built cutting-edge back-end technology; we take pride that our games are played by more than 1 million players daily. Our flagship game, Ludo SuperStar has been downloaded more than 100 million times. Other titles include – CallBreak, Carrom, Solitaire, Spider Solitaire and Word games.

Website link- https://blacklightsw.com/

 

Position: Backend Developer

Location: Noida

Educational Qualification: B.Tech/ MCA / M.Tech / M.Sc  or relevant professional experience; preferably in Computer Science.

Skills :

  • Backend: NodeJS
  • Databases: MySQL/ MongoDB.

Job Summary:

What You Bring To The Team

  • More than 3+ years of experience developing serverless applications using public cloud like Google Cloud/ AWS
  • Knowledge of Node. js and frameworks available for it.
  • Strong proficiency with JavaScript
  • Understanding the nature of asynchronous programming and its quirks and workarounds.
  • Distributed system development with an understanding of latency, scalability, scheduling, asynchronous programming, and reliability
  • Understanding fundamental design principles behind a scalable application
  • Experience with services common to serverless architectures, like: AWS Lambda, DynamoDB, IAM, Firebase Real Time Database, Google Cloud SQL, Cloud Tasks. It’s a bonus if you have worked on Google Cloud Project and Firebase.
  • Solid Experience with NoSQL and SQL databases is required with proven experience of creating database schemas that represent and support business processes.
  • Integration of multiple data sources and databases into one system.
  • Experience with deploying, maintaining, debugging live systems, and end-to-end testing and analysis
  • Experienced in creating micro-services based architectures, reusable components
  • Experience building REST APIs and other common application architectures on the above services
  • Experience building data processing pipelines
  • Solid understanding of code, design, and development practices
  • General comfort in exploring, assessing, and learning new frameworks
  • High levels of integrity and professionalism, and an ability to channel maximum amounts of energy into the role delivering premium customer service at all times
  • Adhere to different Project Management methodologies (Agile etc) and leverage different CI/CD tools

Extra Gems For

  • Google, AWS and/or Industry certifications.
  • Familiarity with object storage such as AWS S3, Firebase Storage, in-memory caches such as Redis
  • Demonstrated performance of threat modeling, risk assessment techniques, code reviews in the context of DevSecOps security
  • Knowledge of Application Monitoring using tools like Google Stackdriver
  • Broad familiarity with other languages like J2EE, Python as we write some code in these as well.
  • Experience with Github and advanced Github features.
  • Experience of working in Product industry
  • Open source contributions, interesting hobby projects.

Why Us?

  • High Growth Startup environment 
  • Company sponsored courses and education material
  • Lots of learning opportunities 
  • Work with a super-talented team of professionals
  • Informal work-culture, Casual Dress Code, multiple outings and trips
  • Performance Based Bonus
  • Competitive Salary
  • Medical Insurance for you and your family 
  • Subsidies Lunch and Unlimited Snacks, Tea & Coffee in the house at all times


Read more
Eitacies Inc
at Eitacies Inc
2 candid answers
Deepu Reddy
Posted by Deepu Reddy
Hyderabad
4 - 10 yrs
Best in industry
skill iconNodeJS (Node.js)
skill iconMongoDB
skill iconExpress
skill iconAmazon Web Services (AWS)
Agile/Scrum
  • Design, implement, and maintain API-based applications and REST services.
  • Proficiency with Node JS.
  • Must have experience in cloud services Azure Cloud/AWS.
  • Familiarity with database technology such as MySQL, PostgreSQL, and MongoDB.
  • Develop high-quality, efficient, and scalable code.
  • Understanding of Agile methodologies and SCRUM framework Strong debugging, analytical and problem-solving skills.
  • Provide technical support during implementation efforts, working with technical team members and with business users as required to provide troubleshooting and solutions to technical issues.
Read more
company logo
Agency job
via Recro by Jisha Emmanuel
Bengaluru (Bangalore), Pune
3 - 6 yrs
₹10L - ₹20L / yr
skill iconJava
Microservices
skill iconSpring Boot
Spring MVC

B.Tech./ BE - Computer, IT, Electronics only

Required Skills:

 

  • 3+ year of experience in Development in JAVA technology and springboot
  • Strong Java Basics
  • SpringBoot or Spring MVC
  • Hands on experience on Relational Databases (SQL query or Hibernate) + Mongo (JSON parsing)
  • Proficient in REST API development
  • Messaging Queue (RabitMQ or Kafka
  • Any Caching Mechanism
  • Good at problem solving

 

Good to Have Skills:

 

  • 3+ years of experience in using Java/J2EE tech stacks
  • Good understanding of data structures and algorithms.
  • Excellent analytical and problem solving skills.
  • Ability to work in a fast paced internet start-up environment.
  • Experience in technical mentorship/coaching is highly desirable.
  • Understanding of AI/ML algorithms is a plus.
Read more
Tetherfi
Tetherfi
Agency job
via Michigan Tag by Shambhavi Srivastava
Remote, Bengaluru (Bangalore)
1 - 7 yrs
₹5L - ₹10L / yr
skill icon.NET
ASP.NET
skill iconC#

The Right Individual:

The ideal candidate will have a passion for technology and software building. Attention to detail and an analytical mind are essential qualities in this role. You will have to works on both technical and design aspects of software projects. A proactive approach to problem-solving as well as a detailed understanding of coding is essential. If finding issues and fixing them with beautiful, meticulous code are among the talents that make you tick, we’d like to hear from you.

Required Functional Skill:

  • Experience in Microsoft .NET technologies such as .NET Framework, .NET CORE, .NET 5, ASP.NET, ASP.NET CORE, .NET Standard.
  • Experience in Designing, Modelling and Development of Database using SQL Server, MySQL, MariaDB, PostgreSQL.
  • Working experience of TSQL, SPs, functions, Optimization techniques, Indexes etc.,
  • Hand on experience on Creating RIA (Rich Internet Application) with HTML5, CSS, Java script, jQuery, AJAX and Telerik tool kit.
  • Strong knowledge of Object-Oriented Design Methodologies and design patterns.
  • Deep knowledge in WPF, WCF, LINQ, Multithreading, WebSocket, Asynchronous, Parallel Programming
  • Knowledge on Cloud Architecture, Azure, AWS Services, containerization strategy micro services.
  • Knowledge on SVN, GIT, markdown, latex is must.
  • Hands on experience in Linux or Unix is an added advantage.
  • Good to have knowledge on Go, Angular, React.
  • Good to have knowledge on CI/CD/CT environment with unit test automation, pipeline-based code deployments etc

Roles & Responsibilities:

  • Extensive knowledge of Software Development Life Cycle (SDLC) and have worked using Waterfall and Agile methodologies.
  • Effective in working independently and collaboratively in teams with excellent written and verbal communication skills.
  • Describe and document technical design, specifications of software product features
  • Ability to represent ideas in conceptual block diagram and converting the same into final schematics and project completion capabilities.
  • Responsible and interfacing with Client/Project Manager, Development, Architecture, QA teams to collect and execute the requirements.
  • Ensure architecture design and development best practices are in place and followed, as well as change management and other process guidelines.

Required Professional & Interpersonal Qualities:

  • Bachelor’s Degree in appropriate field of study or equivalent work experience
  • Experienced with all ancillary technologies necessary for Internet applications: HTTP, TCP/IP, POP/SMTP, etc
  • Ability to perform under pressure.
  • Very Good technical & communication skills to be exhibited in all the roles to be performed
  • Candidates are expected to be creative and innovative in providing complex enterprise integration solutions to large financial institutions across the Globe.
  • Ability to adapt quickly and manage difficult situations while remaining upbeat and positive always.
  • Hands-on experience in revamping any existing software into new business effective and user-friendly applications by solving complex technical problems / known issues with new systems.
  • Must have functional experience in designing applications to develop integrated solutions for voice & multi-media related applications.
Read more
Zycus
at Zycus
10 recruiters
madhavi JR
Posted by madhavi JR
Bengaluru (Bangalore)
8 - 20 yrs
₹15L - ₹25L / yr
Design patterns
skill iconJava
Hibernate (Java)
skill iconSpring Boot
Microservices
+3 more

ABOUT ZYCUS:

Headquartered in Princeton, U.S. in 1998, Zycus has grown every day to be established as an organization which now is a leading global provider of complete Source-to-Pay suite of procurement performance solutions.

We develop cloud-based (SaaS) https://workable.com/nr?l=https%3A%2F%2Fwww.zycus.com%2Fsolution%2Fprocurement-performance.html">Source-to-Pay solutions for large global enterprises, and have successfully deployed about 200 solutions to over 1000 Global clients. We are proud to have as our clients, some of the best-of- breed companies across verticals like Manufacturing, Automotive, Banking and Finance, Oil and Gas, Food Processing, Electronics, Telecommunications, Chemicals, Health and Pharma, Education and more. 

With a team of 1000+employees, we are present in India with 3 development centers at Bengaluru, Mumbai & Pune and offices in the https://workable.com/nr?l=https%3A%2F%2Fwww.zycus.com%2Fcareers%2FUS-Careers.html">U.S., U.K., Australia, https://workable.com/nr?l=https%3A%2F%2Fwww.zycus.com%2Fpress-releases%2Fzycus-expands-middle-east-presence-with-new-location-in-dubai.html">Dubai and https://workable.com/nr?l=https%3A%2F%2Fwww.zycus.com%2Fpress-releases%2Fzycus-continues-global-expansion-with-new-office-in-singapore.html">Singapore, Amsterdam. 

https://workable.com/nr?l=https%3A%2F%2Fwww.zycus.com%2Fcompany%2Fcareers.html">Know more about the LEADER of: https://workable.com/nr?l=http%3A%2F%2Fcampaign.zycus.com%2FGMQ2017">Gartner’s 2013, 2015 & 2017 Magic Quadrant for Strategic Sourcing Application Suites and https://workable.com/nr?l=http%3A%2F%2Fcampaign.zycus.com%2FThe-Forrester-Wave-eProcurement-Q2-2017-Zycus-Named-a-Leader">The Forrester Wave™: eProcurement, Q2 2017

Software Engineering Manager/Principal Architect will be responsible for Technical ownership of an entire line of business or a horizontal platform, which extends to:
  1. Involvement in the full software development life cycle with stringent needs on (i) time to market, & (ii) quality of product - functional and non-functional aspect.
  2. Ownership of complex software architectures, operational metrics, and running the day to day business operations.
  3. Designing and defining the interaction between the different components and teams.
  4. Work closely with peers and product managers to develop great technical design and approach for new product development.
  5. Definition of, and compliance with, a world-class build/release and configuration management process.

This position will report in to Director of engineering & the roles & responsibilities are as below: 

  1. Identify the technologies that would be used for the product.
  2. Recommend the development methodology and framework for the project.
  3. Provide the overall design and structure to the application.
  4. Ensure that the product is adequately defined & documented.
  5. Establish design/coding guidelines and best practices, and drive usage of design patterns.
  6. Enforce compliance with coding guidelines using code reviews etc.
  7. Build solution which is easily configurable, deploy-able and secure in SaaS environment.
  8. Responsible for planning product iterations & releasing iterations on schedule.

    The Applicant with a total experience of 10-20years, should have hands-on development experience in Core Java and J2EE with proven expertise in writing application architecture and core design ground up with sound algorithmic thought process enabling bullet-proof application performance in terms of key drivers like security, load, scalability, etc.

    Skills and Technologies:
    1. Versatile experience with delivering highly available services on multiple technology stacks in traditional data centers, public clouds, and private clouds.
    2. Core Java, J2EE, Spring, Hibernate, JMS/Rabbit MQ/Kafka, Web-Services, Oracle, MSSQL, JSP-Servlets, , Design Patterns.

    Nice to have: New edge technology (Hadoop, AWS, Spark, RabbitMQ etc)

    Team mentoring:

    1. Mentor developers for difficult tasks & provide technical advice and guidance to the Tech Leads.
    2. Guide the team is doing POCs and early risk assessments.

      Leadership Abilities:

      • Optimize & effectively manage resources and time of the team members.
      • Identify, track and mitigate risks to the product
      • Should not hesitate to carry out healthy and constructive confrontation with team members, peers and managers for the benefit of Product.
      • Along with a competitive compensation structure, Zycus believes in an open culture learning environment, where everyone gets a chance to share their ideas and deliver par excellence.
Read more
Litmus World Marketing Technologies Pvt Ltd
Bengaluru (Bangalore)
5 - 8 yrs
₹12L - ₹20L / yr
skill iconMongoDB
skill iconNodeJS (Node.js)
skill iconAngularJS (1.x)
Data Structures
skill iconGit
+2 more
The Company - Litmus World is looking to hire Module Leads to direct the organization through its next phase of rapid growth and development. Litmus is the platform of choice for businesses to communicate directly with their own and others’ customers in real-time, context-rich, touch point environment. Litmus leverages cutting-edge technology to make it easier for business to deliver these capabilities: • Digital interfaces deployed at the point of interaction enable businesses to have “structured conversations” with millions of customers in real-time. • Dashboards deployed across the business help managers and staff better understand and manage customer micro-experiences via manual and auto-triggered communication in real-time Customer data and analytics from across brands give companies insights and opportunities to hyper-target prospects and customers to increase revenues. Job Description Position: Module Lead Location: Bangalore Brief: Looking for Mean Stack Developers. Responsibilities • Define code architecture decisions to support a high-performance and scalable product with a minimal footprint • Address and improve any technical issues • Collaborate well with engineers, product, and designers to design and create advanced, elegant and efficient systems • Responsible for timely and high quality deliverables. • Task Management and Reporting Education & Experience • UG: B.Tech/B.E. - Any Specialization • PG:Any Postgraduate - Any Specialization • A total experience of 6 years’ in which a minimum of 3 years should be in Mean Stack and atleast 2 years should be in handling a team. Knowledge, Skills & Attributes • In depth knowledge of NodeJS and ExpressJS • Experience creating front end applications using HTML5, Angular • Experience with GruntJS and GITStrong understanding of HTML5, CSS3, Javascript, AJAX and JSON. • Focused. • Good problem solving skills
Read more
Thrymr Software
at Thrymr Software
3 recruiters
Sridhar Atyam
Posted by Sridhar Atyam
Hyderabad
2 - 5 yrs
₹3L - ₹10L / yr
skill iconNodeJS (Node.js)
skill iconJavascript
skill iconMongoDB
skill iconExpress
Hands on Experience on Nodejs Looking for candidates who can join immediately
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.
ai_chip
Move faster with AI
We use AI to get you faster responses, recommendations and unmatched user experience.
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