Hire the Top 2% of
Freelance Back-End Developers
in North America

Chris R.

Vetted Back-End developer in the United States (UTC-5)

Over the last 15 years, I've worked as a teacher, a support engineer, a data engineer, and a software engineer. In all that time, the most engaging and satisfying work was always helping other people learn and overcome challenging issues. I have professional experience with the following languages/technologies: * Python * Java * Bash * Web (HTML, CSS, JavaScript/TypeScript) * SQL (multiple dialects) * Korn * Perl * C * Android * Docker * Linux * Git I've developed everything from simple scripts that automate repetitive tasks, to ETL pipelines, to full stack web applications (the API and backend services, as well as the HTML/CSS/JavaScript frontend), and along the way I've mentored engineers, students, and non-technical people wanting to level up their skills.

MANISH S.

Vetted Back-End developer in Canada (UTC-5)

Manish is a full stack developer and a GCP certified system architect. In past he has worked on building low latency FX Options auto trading system, analytics app/chat bot using Java, Reactjs, python and KDB+ for HSBC, financial product benchmarking and alerting application for UBS, B2C CRM product for Oracle. He is passionate about distributed system, love to take part in hackathons and play tennis.

Guruprasad K.

Vetted Back-End developer in the United States (UTC-4)

Technology architect and model developer with focus on building data driven mathematical & statistical tool-sets and implementing them efficiently using real-life software systems \- Adept in monolithtic as well as Service Over Architectures (SOA) building scalable services and robust tool sets \- Extensive experience with xml, html, json and their associted transformations. Setting up ETLs and other automated data pipelines \- Financial time series analysis, Approaches for price, volatility determination/forecasting | Support Vector Machines (SVM) | ML and AI | Mathematical models from scratch. \- High Frequency tick-data - Fourier analysis to identify filtering mode without the loss of market microstructure **Technology Stack** Python📷 | R | C++ | MATLAB | Excel/VBA | Java **DB:** SQL, KDB/Q | SQL **OS:** Linux | Windows **cloud:** Azure, AWS **Version Control:** GIT

Eko W.

Vetted Back-End developer in the United States (UTC-7)

Experienced Software Engineer with over 10 years of experience working in the tech industry. Skilled in building distributed application, cloud, backend engineering, scalability and performance.

David L.

Vetted Back-End developer in Canada (UTC-4)

Accomplished Sr. Software Engineer and **AWS certified Solutions Architect** with hands-on experience in delivering high-quality apps that scale. Built & grew one startup business from 0 to $6M+ in revenue, by figuring out how to convert technologies into products, repeatedly (micro-)pivoting till we got to product-market fit, and developing creative and focused go-to-market strategies.

Forrest L.

Vetted Back-End developer in the United States (UTC-6)

Experienced software engineer specializing in Golang and C# with a strong background in developing scalable applications using a wide variety of tech stacks, throughout the entire Software Development Life Cycle. My career has primarily encompassed short-term contracts, through which I have gained diverse skills and adaptability in fast-paced environments.

JD M.

Vetted Back-End developer in the United States (UTC-7)

I have 20 years of experience designing and developing information systems and technology solutions in the areas of transportation infrastructure and manufacturing operations, traveler information, GIS & mapping, and enterprise data analytics. My skills span software systems architecture, database design, analytics and machine learning pipelines composition, and Python development. I am passionate about so-called "cyberphysical" systems that model physical world assets and data -including applications such as mapping, IoT, and decision support systems in infrastructure-centric industries like transportation, utilities and manufacturing.

Mario B.

Vetted Back-End developer in the United States (UTC-5)

Senior Backend Engineer who likes to design and build scalable, reliable software on a team and have fun doing it.

Charles O.

Vetted Back-End developer in Canada (UTC-7)

I am a senior software engineer, developer advocate, and technology leader with experience working for startups, governments, Google, Andela e.t.c. I have built and lead engineers building for eCommerce, Edtech, Fintech, and Software as a Service to name a few. I love to write, code in JavaScript/Typescript/Python, and support clients with my can-do-anything spirit and clear communication skills. I enjoy mentoring and empowering engineering talent. I have had successes with this both at scale (thousands of developers) and with my direct reports as well. If you need to write clean JavaScript, intuitive Typescript, bug-free Python, build delightful REST APIs and SDKs, store data in relational or NoSQL databases, analyse data with SQL, containerize applications with Docker, run serverless container workloads on the cloud (AWS), organise code with monorepos, build/run pipelines with GitHub Actions / Jenkins, get cross-functional teams to deliver consistently and ship scalable products and services that solve business problems, then let's definitely talk!

A R.

Vetted Back-End developer in Canada (UTC-4)

Seasoned Java software engineer with over a decade of expertise in designing, developing, and optimizing high-performance systems. Proficient in leading technical teams and mentoring emerging talent, I have consistently delivered quality software solutions that exceed business expectations. Recognized as an active thought leader, I have spoken at international industry conferences and contributed to esteemed platforms like InfoQ and Foojay.IO. Armed with a comprehensive skill set that combines technical mastery, proven leadership capabilities, and extensive industry knowledge - Senior Java developers with 11+ years of experience. - Experienced back-end developer (developed a backend system for a financial application that serves 10+ million users). - Expertise in developing mobile applications - Expert in Java ( including Java 11-21, lambda expression, and stream API, Concurrency) - **Published four books** on Java ( 3 of them best-sellers) - Java User group leaders - Contributed AdoptOpenJDK project **Editorial Contributions** • Contributing Editor for the Java Queue and Architecture Queue at InfoQ.com. • Editorial Contributor at Foojay.io. **Community Leadership and Engagement** • Founder and Organizer for the Java User Group of Bangladesh (JUGBD), community meetups and conferences since 2013. • Recently joined the Jakarta EE Ambassadors Program. • JCP Associate Member: Active member of the Java Community Process. **Technical Contributions and Workshops** • Eclipse Committer for the Jakarta Starter project. • Presented talks on Java and software engineering topics. More details at bazlur.ca/conference-talks. Twitter: https://twitter.com/bazlur_rahman LInkedIn: https://www.linkedin.com/in/bazlur/ Key Skills: Programming Language: Java (JSE, JEE), Java 8, Java 11 to Java 21, Scala, Python, Groovy, C, JavaScript Frameworks: Spring Boot, Spring Framework, Grails, Hibernate, JPA, JMS, Android Database: Oracle Database, DynamoDB, Microsoft SQL Server, MySQL, PostgreSQL Development Tools: IntelliJ Idea, Eclipse, Maven, Gradle, GIT, TeamCity(CI/CD), NeverCode CI, Middleware: Apache Tomcat, JBoss EAP, Oracle WebLogic Server, AWS (CloudFront, CloudWatch, Beanstalk, S3, SNS/SQS, Lambda, Ec2, Kinesis, Redis, Redis PubSub), jPOS Operating Systems: Mac OS X, Linux Ubuntu, Linux CentOS Others: Microservices, RESTful API design, and integration, Clean Code, Clean Architecture, OOP, SOLID, TDD, Design Patterns, Agile methodologies