Hire the Top 2% of
Freelance Coding challenges Developers

Richard M.

Vetted Coding challenges developer in the United Kingdom (UTC+1)

I have designed and built complex software platforms and applications, from mobile to blockchain to enterprise systems spanning the globe. For example: 2022-23 I'm the interim CTO of a social media startup with 10m MAU (monthly active users) and I was hired to lay the foundation to scale the architecture, the team and the processes to grow 10x. 2019 The family that owns BMW hired me to design, build and hire a team to implement a private wealth management platform. I rescued Chase Bank's Y2K project from failure across 40 countries in Asia. A project I spear-headed saved UBS Inv. Bank several hundred million GBP in bad bonus payouts the year it went live...and continued to save money every year after, as it became a core bank system. A mobile app for early years eduction that I built won national press recognition and research awards from Oxford University. I am an internationally experienced Architect, Leader and Full Stack Software Engineer. [http://www.richardmcsharry.com](http://www.richardmcsharry.com/)

Felix F.

Vetted Coding challenges developer in Germany (UTC+1)

Machine Learning Engineer Developing and Implementing ML solutions, choosing the right technologies and making systems production-ready (clean code, pythonic style, testing). Deploying, scaling and maintaining deep learning systems and microservices (Docker & Kubernetes). Machine Learning and Data Engineering, Test-Driven Development and Continuous Integration (GitHub & Jenkins), building data pipelines. Building reliable and scalable frameworks in Python.

Rana Y.

Coding challenges developer in Egypt (UTC+2)

I am a third-year Computer Science student specializing in Artificial Intelligence and Data Science, with a passion for web development. I have expertise in machine learning, neural networks, and data analysis, aiming to innovate and solve real-world problems. My technical skills include C#, Python, JavaScript, SQL, HTML, CSS, [ASP.NET](http://asp.net/), MVC, [ADO.NET](http://ado.net/), Entity Framework, and more.

Angel P.

Coding challenges developer in Brazil (UTC-3)

\* Qualifications: \- Systems Engineering and a Postgraduate degree in System Analysis and Development. \- Over 9 years of experience in web development and 6 years in mobile development, proficient in technologies and frameworks including Flutter, Ionic, Nodejs, React, React Native, TypeScript, Next.js, Effector, HTML, CSS3, Tailwind, Styled-components, Husky, ESLint, Storybook, Jest, React-testing-library, Watermelondb, DatoCMS, Git flow, and CI/CD. \- Advanced knowledge in React.js, Next.js, and familiar with the latest ECMAScript features such as Arrow Functions, Template Literals, Destructuring, Spread/Rest operators, Vanilla.js. \- Practical knowledge of relational and NoSQL databases, such as MySQL, MongoDB, etc. \* Skills and Abilities: \- Ability to write clean, modular, and readable code, adhering to best practices in programming and design. \- Good understanding of software architecture and design principles, including MVC patterns and SOLID principles. \- Proficiency in implementing documentation, development flow, testing, updates, features, performance improvements, maintenance, and upgrades of legacy projects. \- Strong problem-solving skills, demonstrating analytical thinking and problem resolution capabilities. \- Excellent communication and collaboration skills, capable of working in a team and effectively communicating with both technical and non-technical colleagues. \*Additional Qualifications: \- Experience with Axios, AWS, testing, and quality assurance. \- Experience with version control tools such as Git. \- Tools for observability. \- Fluent in Spanish, Portuguese, and English. \- Passionate about learning new skills and technologies, with studies in Astro, Python, Swift, and C#. \- Enjoys working with teams and leading technical tasks, always aiming for quality and customer satisfaction.

Daniel L.

Vetted Coding challenges developer in Peru (UTC-5)

Experienced full-stack software engineer boasting 10 years of professional expertise, the past seven years of which have been devoted exclusively to serving clients in the United States through remote collaboration. A dedicated advocate for meticulous software craftsmanship, I am inclined towards writing code for humans. My extensive portfolio spans engagements with prominent enterprises and dynamic startups alike. Regard me as a versatile professional akin to a Swiss Army knife—proficient in constructing intricate UIs with robust state management and personalized components, developing resilient asynchronous API services, optimizing data consumption across multiple sources, implementing CI/CD pipelines, and conducting thorough unit, integration, and end-to-end testing. I thrive on challenges, maintain a high level of tolerance for uncertainty, and take pride in assuming ownership of both the product and the strategic decisions behind my designs, always guided by a commitment to delivering business value.

Lorena R.

Vetted Coding challenges developer in Brazil (UTC-4)

In my career of 10+ years in software development, there are 2 projects I am particularly proud of. In my previous company, I worked on a payment solution for the Payment Split Marketplace. I helped restructure processing of messages by separating them into microservices. In my current company, I am contributing to the integration process with a new partner that will provide exclusive benefits to our customers. In my daily life, I have been ​​using Solid, CleanCode, Kiss, Dry, Design Patterns, Messaging, Microservices, Cache, Code Review, CI/CD on Azure, unit/integration tests, .net core c#. I enjoy teamwork, and often receive positive feedback for my collaboration and communication skills.

Nurbo K.

Vetted Coding challenges developer (UTC+5)

I'm a Senior Software Engineer with 13+ YOE and I help Software Engineers ace their coding interviews on Algorithms and Data Structures. I have interviewed people at FAANG and Silicon Valley startups, and I have taught thousand of hours of Algorithms and Data Structures classes. I help you prepare for your interview by: - Conducting mock interviews and giving you targeted feedback - Designing custom preparation plan - Clearing up topics and problems that confuse you - Sharing interviewing tips & tricks

Vlad S.

Vetted Coding challenges developer in Romania (UTC+2)

I am Vlad, an iOS engineer with five years of experience. During my career, I had the chance to work on projects ranging from small ones to corporate-level projects. In this period, I experienced multiple architectures, design patterns, Apple frameworks, Clean code principles, SOLID principles, understood the value of testing and the benefits the TDD approach can bring to your design. I consider these skills fundamental to writing easy-to-change code. The primary trait of good architecture and good code, from my perspective, is the possibility to update and refactor code smoothly. At the end of the day, these are all skills that can be taught and acquired. I am more than happy to share them with you, the mentee. My ultimate goal is to help everyone write better code and incorporate these principles in day-to-day coding. If this sounds like a person you would like to collaborate with, don't hesitate to contact me!

Anass E.

Vetted Coding challenges developer in Morocco (UTC+1)

I am a passionate web developer with experience in PHP Laravel and JavaScript VueJs ecosystems. I write clean, readable, scalable, and maintainable code that adheres to the latest coding practices and standards. I work well in teams using Scrum methodology and understand the importance of effective communication and collaboration. I am committed to continuous learning and staying up-to-date with web development trends and technologies. I prefer working remotely and am able to manage my time effectively to deliver high-quality work on schedule. I am dedicated to delivering exceptional results and ensuring the satisfaction of my clients. I am excited about the opportunity to work on challenging and exciting projects that will allow me to continue developing my skills and expertise. I am always looking for opportunities to learn and grow in my career. I take responsibility for my own personal development and prioritize learning as an essential part of my career. I am interested in any opportunity to improve my understanding of web technologies further. I am a reliable and dedicated web developer committed to delivering exceptional work that meets the needs of my clients. I am excited about the opportunity to work with you and bring your vision to life. **TOP Skills:** * Expertise in the PHP Laravel framework * Proficient in front-end web technologies: HTML, CSS, and JavaScript, as well as the Vue.js ecosystem. * Familiarity with NodeJs ecosystem. * Familiarity with Shopify development. * Experience with containerization using Docker. * Familiarity with cloud platforms like Google Cloud, AWS, and DigitalOcean. * Proficiency in version control with Git. * Experience working with relational databases, including MySQL, Oracle, and PostgreSQL, as well as in-memory data stores like Redis and Memcached. * Knowledge of LAMP and LEMP stack. * Familiarity with designing and developing APIs, including REST, GraphQL, and gRPC. * Experience with testing and implementing CI/CD pipelines. * Strong understanding of software design and development principles. * Strong analytical and problem-solving skills. * Passionate about software development. * Excellent team player. * Proficient in debugging complex code. * Strong interpersonal skills. * Ability to learn, adapt, and grow with emerging technologies.

Arushi S.

Vetted Coding challenges developer in India (UTC+6)

I am Arushi Singhal, Software Engineer at Amazon. I have a keen interest in Algorithmic Problem Solving and have been programming for around 7 years now. I interned in Summer 2019 at Google as a Software Engineer. In Summer 2018, I did a Machine Learning internship at Robert Bosch Engineering and Private Limited, Bangalore, India (RBEI). I have multiple experiences of back-end development for large-scale systems. During my internships, I worked with Python and machine learning libraries in Python, Java, gRPC, Protocol Buffer, Google Guice and Google’s Internal Frameworks, Django, Ruby on Rails. I have also contributed to many open-source projects, including the Linux Kernel. I have submitted over 50 patches to kernel code. My other contribution to Open Source can be seen on my GitHub Profile. I am also passionate about mentoring and motivating people to contribute to open-source projects and was Google Code-In Mentor in 2017 for OpenWISP and Sugar Labs. I also worked as a Computer Science Instructor at CodeConnect, where we as an instructor ensure that our computer science education is accessible, empowering, and supportive for the next generation, and committed to our mission of increasing diversity in tech. In CodeConnect, I gave Python lectures to Pre-University students. I also used to be a Student Teaching Assistant and Research Assistant and I find teaching/mentoring extremely motivating - sometimes I'd get introduced to new interesting topics that I'd probably never think of finding out about on my own if it wasn't for the purpose of explaining it to someone else. Sometimes I'd get a completely new perspective on subjects I thought I knew when trying to find a way to present it to someone else. I'd really love to keep learning this way. One of the topics I'm always happy to talk about are the interviews - I've done a fair share of them, most of them in top tech companies and I would love to share what I've observed so far. I'm always up for tackling interesting interview questions, doing mock interviews or just giving resume tips (I got my interviews at Amazon, Facebook, Microsoft, Google and also at open-source communities without a referral, so I might help you with reviewing your resume to make it stand out. :)) Other than that, you can always reach out to me if you have questions related to Java, Python, R, Matlab, C, C++, Data Structures, Algorithms, SQL, GIT, Mathematics etc. I try to keep my knowledge and skills up to date and learn something new every day by helping you! Being a researcher, quick learner and having software development experience, I believe I am a good fit for mentoring.