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Hi! I’m Christoph — a certified Python developer (PCPP1), experienced software engineer, and ex-BCG consultant. I’ve helped professionals and teams debug smarter, prep for certifications, and turn complexity into clarity. **Let’s simplify your next challenge.**
I am a mobile developer who has worked on Android and iOS applications for 6 years for both large and small companies. I am very passionate about teaching and mentoring and have over 2 years of experience teaching students Java and Python programming, as well as project management.
Senior Software Engineer with over 7 years of active software development. I'm proficient in C#, Java, Javascript, Node, Angular, and Flutter. I make complex things simple with proof.
With over 16 years of industry experience, I am a seasoned Application Architect specializing in mobile development. My journey with macOS and iOS development began in 2011, utilizing Objective-C and Swift, after working extensively with C/C++ and C# on Windows platforms from 2007. I also have hands-on experience with Python and JavaScript, enabling a versatile approach to application design. I excel in crafting project architectures and feature designs, backed by strong expertise in memory management and multithreading. My commitment to delivering high-quality mobile projects is demonstrated through comprehensive code assessments, refactoring, and extensive experience in writing both Unit and UI tests. As a team leader since 2013, I have successfully nurtured a talented group of developers, expanding our team from 8 to 17 members over five years. I focus on developing personalized growth plans, setting and achieving goals, and conducting evaluations, resulting in several team members advancing to senior developer and tech lead roles. I am adept at leading critical projects from conception to deployment for high-profile clients, with a strong focus on the entire project lifecycle. Known for my ability to modernize SDLC processes, I foster collaboration across diverse teams, driving strategic technical solutions while managing significant workloads with precision. I am committed to innovative leadership and effective project management.
Highly experienced Java Software Engineer with over 9 years of expertise in designing and implementing enterprise-level identity and access management (IAM) systems. Proven track record of leading complex software projects, from concept to deployment, utilizing a deep knowledge of distributed systems, microservices, and secure authentication protocols. Adept at managing cross-functional teams, conducting detailed code reviews, and driving continuous improvement in software development practices. Passionate about solving challenging technical problems and delivering scalable, high-quality software solutions. Currently focused on advancing my career in software engineering and project management.
Expertise in code reviews and debugging. I want to help to get stuff done with coding.
Expert at developing high-quality software solutions that leverage appropriate automation techniques. Looking forward to pair programming with you on your problem!
Dedicated professional with demonstrated strengths in Software Design, Architecture and independently working on all phases of software development. Good at troubleshooting problems and building successful solutions. Usually spend 80-90% of time on hands-on coding work. Excellent at developing proof-of-concepts and learning new technologies. Dependable employee seeking opportunity to expand skills and contribute to company success. Considered hardworking, ethical and detail-oriented. Passionate and skilled blockchain developer with a strong focus on Ethereum blockchain and smart contract design, development and integration with front-end web3 applications. Proficient in Java, Solidity, and various development tools like Hardhat, mocha, Remix IDE, VS IDE, Truffle, Ganache with a successful track record in debugging and resolving complex code errors. Hands-on experience in front-end web3 development with Node, ReactJS and NextJS. Hands-on completion of multiple Udemy courses in various branches of blockchain technology with an impressive GitHub project portfolio. Proud holder of online professional certificate in Blockchain from Indian Institute of Technology Kanpur INDIA (Online Blockchain Course [2025] - In Collaboration with SimpliLearn). Developed multi-technology blockchain projects and capstone projects for this certification in domains like Solidity smart contracts and Hyperledger Chaincode. Committed to advancing technological innovation and contributing to transformative solutions. Enthusiastic about utilizing technical expertise to elevate mission-driven projects and foster impactful advancements in blockchain technology.
With over a decade of experience in full-stack development, I specialize in **Ruby on Rails, custom eCommerce solutions** (Spree, Solidus), **ReactJS**, and **DevOps**. My expertise spans designing and developing scalable, distributed cloud-based applications with a strong foundation in **database architecture** and **system refactoring**. As a technology leader, I’ve successfully delivered complex, high-impact projects across industries including **Real Estate, Finance, Healthcare, Marketing**, and **eCommerce**. My portfolio includes building sophisticated eCommerce marketplaces, **SaaS platforms**, and multi-channel selling applications. I am passionate about crafting innovative, robust software solutions tailored to meet diverse business needs. **Key Expertise:** - **Backend:** Ruby on Rails, building and scaling RESTful APIs. - **Frontend:** ReactJS, JavaScript, responsive UIs with Tailwind CSS, and Bootstrap. - **eCommerce Solutions:** Spree, Solidus, custom marketplaces, multi-tenant SaaS platforms. - **Database Architecture:** MySQL, PostgreSQL, MongoDB, Redis, Cassandra, optimized for high performance and scalability. - **DevOps:** CI/CD pipelines (CircleCI, AWS Pipeline), containerization (Docker), cloud platforms (AWS, GCP, Heroku, DigitalOcean). - **Test-Driven Development:** Expertise in TDD using RSpec, ensuring high code quality and maintainability. In addition to my technical expertise, I have a strong commitment to **open-source contributions** and have developed multiple **Ruby/Rails/Spree extensions**. I also bring a wealth of experience in **refactoring legacy code bases**, implementing **performance optimisation**, and improving **scalability** and **security**. My passion lies in helping businesses unlock their full potential through technology, and I am always eager to collaborate on long-term, impactful projects. Let’s build the future, one line of code at a time. Best regards, Rahul Singh
Thanks for checking out my profile. I have over a decade of full-stack dev experience with languages/frameworks like Ruby, Rails, Javascript, Nextjs and React. I enjoy mentoring/tutoring but I also have experience founding and growing a company. I co-founded a vc-backed startup that has helped SMBs exchange over 80 million messages with customers etc.
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