Hire the best JavaScript Developers in Cambridge, MA
Check out JavaScript Developers in Cambridge, MA with the skills you need for your next job.
- $125 hourly
- 4.7/5
- (92 jobs)
Hi there! I've been on Upwork for a while now and I consistently deliver time and again. Shoot me a message - I'd be happy to see if my skills fit your project!
JavaScript
CSketchUpScrapySvelteVue.jsReactStripe APIBack-End DevelopmentAPI DevelopmentC++CSSHTMLRustPython - $90 hourly
- 5.0/5
- (15 jobs)
For over a decade, world-series winning professional baseball teams, top universities, premier hospitals, VC-funded startups, digital agencies, marketing firms, and small business owners have placed their trust in me for their critical tech projects - and you can too, if you want. I’m Pat, a senior-level software engineer from the USA. And if you're looking for... Someone you can trust to deliver quality work, and — above all — tangible results, then you are in the right place. Because there's a good chance you need more than a freelancer to do a task; you need a collaborator who’s successfully weathered the storm, time and time again. That's why when we work together, you're NOT getting: ❌ Someone diving into the "deep end" for the first time ❌ Unanticipated budget "surprises" ❌ Final products that miss the mark ❌ Security vulnerabilities ❌ Someone whose stretched too thin across projects ❌ A lack of transparency and communication ❌ Nonexistent post-project support Instead, you get a professional who: 💰 Respects the weight of your decisions 💰 Values the trust you place in them 💰 And is committed to delivering results. Whether you're looking to: ✅ Build ✅ Refine ✅ Innovate ✅ Troubleshoot ✅ Or simply seek advice... Consider it done. I bring over a decade of expertise to the table, and even 'Top Rated' and 'Rising Talent' accolades from Upwork (when I first started on here). If you only need someone to write some code here and there, I'd look elsewhere. Rather, I'm here to help you sidestep stress, make informed decisions, and breathe life into your ideas. So, now that you know a bit about me... Here’s how I’ve brought my clients' visions into reality, and how I may be able to do the same for you... 🚀 Architected 20k-message/day chat system, boosting engagement (Previous Employer) 🚀 Devised email platform, enhancing deliverability and message-to-market match (Own Company) 🚀 Achieved 87% cost cut migrating AWS to Heroku (Upwork/Agency Client) 🚀 Engineered Stripe system, optimizing ed-tech transactions (Upwork/SaaS Client) 🚀 Built custom headless CMS for rapid content creation and testing (Own Company) 🚀 Performed security audits, eliminating fraudulent Stripe charges (Upwork/Agency Client) 🚀 Implemented workflow system, reducing complexity (Own Company) 🚀 Optimized Shopify store, boosting speed by 20% and SEO (Upwork/E-commerce Client) 🚀 Migrated NextJS codebase to Google Cloud (Upwork/SaaS Client) 🚀 OAuth integrations for Facebook, Google, Twitter (Upwork/SaaS Client) 🚀 Meta Pixel and GTM audit (Upwork/Youtube Influencer) 🚀 Audited complex AWS setup, resulting in reducing monthly bill from $120 to $0.05 (Upwork/Agency Client) 🚀 Self-taught PHP/MySQL, building innovative medical stock alert system over SMS (Peace Corps Volunteer) 🚀 Built data dashboards to optimize ticket sales (MLB) 🚀 Created HIPAA-compliant cloud systems for a leading hospital's research (Hospital) 🚀 Developed an online platform for a premier university, enhancing e-learning (University) 🚀 And much more... In fact... Over the years, I've sharpened my skills to deliver not just robust technical solutions but also innovative strategies that strengthen your business. I can help you with things like: 👉 Creating Dynamic, Data-Driven User Interfaces 👉 Developing Robust and Scalable APIs for Mobile and Web Applications 👉 Optimizing Frontend Performance, Enhancing User Experience 👉 Ensuring Website Accessibility and Compliance 👉 Architecting and Implementing Scalable Backend Systems 👉 Debugging and Refactoring Legacy Code for Performance 👉 Strategizing and Executing Cloud Migrations or Optimizations 👉 Developing and Integrating Secure Payment Systems 👉 Optimizing E-comm Stores for Better Conversions 👉 Performing In-depth Security Audits and Fortification 👉 Creating Custom, Efficient Content Management Systems 👉 Crafting and Optimizing Data Models for Scalable Applications 👉 Designing and Implementing API Integrations 👉 Providing Strategic IT Consultation and Roadmap Planning 👉 And much more! So, with that said, here's my promise to you: From concept to code, your vision is safe with me. Remember, you don’t just get a coder. You get a collaborator who works to understand your business, navigate its challenges, and craft solutions that just make sense for you. Expect transparent communication, strategic problem-solving, quality, flexibility, proactive initiative, and security, all wrapped in one. So... If you are ready to make smarter decisions, ditch the stress, and actually see your ideas come to fruition... Send me a message now. Pat
JavaScript
Ruby on RailsRubyAWS LambdaNext.jsStripeReactFirebase Cloud FirestoreFirebaseGoogle Cloud PlatformGolangPythonNode.jsPhoenix Web FrameworkElixir - $50 hourly
- 5.0/5
- (5 jobs)
I have a background in both the medical field and software development, which gives me a unique perspective when it comes to problem-solving and technical work. I'm experienced in a range of technologies, including HTML5, CSS3, SCSS, LESS, Javascript, jQuery, ES6, PHP, Wordpress, React, Webpack, and more. I've helped start companies and grow businesses, such as Etched Stone Paper, which quickly reached significant revenue under my technical guidance. Whether you need small changes or a completely new website, I can adjust to fit your project requirements. I believe in clear and open communication, so I'll keep you updated on what I'm doing and any issues that might come up. My aim is to make sure my work helps you achieve your business goals. I'm not just a hired hand, but a committed partner in your success.
JavaScript
ShopifyFull-Stack DevelopmentwebpackjQueryWordPressSCSSSassTypeScriptVue.jsBootstrapReactHTMLCSS 3Web Development - $80 hourly
- 5.0/5
- (5 jobs)
I am a self-defined technology unicorn fueled by coffee with a go-getter, take-the-extra step, get-it-done the right way attitude and a belief that any problem can be solved with a bit of design thinking and technology. Technology Proficiencies Include: ——————————————————————————— Languages: Python, JavaScript, HTML, CSS, Linux/Unix Frameworks: React, React Native, Vue.js, Selenium, Salesforce (and Salesforce Mobile SDK) Database: SQL, NoSQL (MongoDB) Certificates: AWS Associate Solutions Architect
JavaScript
Design & Usability ResearchFront-End DevelopmentScriptingData EntryMobile App DevelopmentRapid PrototypingData MiningAPIPythonData Scraping - $75 hourly
- 4.9/5
- (9 jobs)
Principal Software Engineer/Developer with 20+ years experience. BS from Carnegie Mellon (Graduated 1999) and MS from Bentley University (2003). Experience in all parts of the stack, from front-end work to data-pipelines. Strengths include communicating complex technical challenges to business people, carefully reviewing consequences of system changes, estimating required effort, and implementing comprehensive test coverage. Looking for remote part-time work 20-25 hours a week. Technologies: * Python: Pydantic, Celery, SQLAlchemy, Flask, Asyncio, Pytest, Pypi, Mypy/Static Typing, Jinja2 * Docker: Dockerfile, docker-compose * SQL: Oracle, Postgres * AWS: Lambda, DynamoDB, EC2, SNS, SQS, S3, ECR, Redis, Secrets-Manager, API Gateway, CloudWatch/Insights * JS/HTML: Node, REACT, Npm * Interfacing with EHR's: Athena (Worked there 13 years), Epic, Centricity, Millennium (Cerner), FHIR, SIUS, Mirth See my aws_cloudwatch_insights package on Pypi or Github.
JavaScript
CeleryHTMLReactDocker ComposeKibanaSQLAlchemyAWS LambdaRedisAmazon DynamoDBPerlDockerSQLCircleCIPython - $100 hourly
- 5.0/5
- (43 jobs)
I've been on Elance (now UpWork) for a long time. From 2013 to 2016, I did a lot of Minecraft-related system administration, technical writing, and support tasks. Now my professional life is in Linux System Administration within an onsite HPC cluster, with a jack-of-all trades mindset. I dabble in networking (with a CCNA), Linux SA with focuses on RHEL/CentOS, and a bit of Windows. Linux system administration is my current preferred work.
JavaScript
Windows AdministrationCopywritingLinux System AdministrationMinecraftGhostwriting - $120 hourly
- 4.9/5
- (33 jobs)
I am a professional developer of lab and online experiments. I use Django-based platform named oTree. The full list of my oTree projects is available in my GitHub. Among the recent ones are Information cascade experiment and Dynamic Volunteer's Dilemma . I also have made a series of projects and enhancements to oTree, such as a customization of session monitor, an ability to randomize the sequence of apps during the experiment's execution , and custom starting Waiting Page for dealing with some Amazon mTurk issues (drop-outs).
JavaScript
UX ResearchAmazon EC2Survey DesignNode.jsDjangoMechanical Turk APIPython - $40 hourly
- 4.7/5
- (2 jobs)
I am a Software Engineer with strong fundamentals in data science, web and mobile application development, data management systems, cybersecurity, and applied machine learning looking to leverage my expertise and passion looking to craft inventive solutions that drive positive change.
JavaScript
Hyperparameter TuningFeature EngineeringData AnalysisProject ManagementNodeJS FrameworkFull-Stack DevelopmentMachine LearningData ScienceMongoDBPostgreSQLMySQLJavaPythonBack-End Development - $50 hourly
- 0.0/5
- (0 jobs)
I'm an experienced developer who has built AI full-stack products at Twilio, run growth at Dialpad, and built my own company with Hyper (AI Financial Analyst). Have built, designed, and managed projects from ideation to launch and always looking for ways to help others.
JavaScript
Amazon DynamoDBPostgreSQLVercelNext.jsNode.jsReactGolangTypeScriptArtificial IntelligenceWeb DevelopmentProduct ManagementProduct Development - $150 hourly
- 4.8/5
- (4 jobs)
tl;dr Tech I know: Python and Flask with Peewee, Ruby for scripting or for Rails 2.3.8 - 5, React with Flux architecture, AWS, Postgresql, Node.js, PHP, plus a billion other things around deployment, server provisioning, infrastructure, etc.. I'm an Ivy League trained Software Engineer that has often straddled the line between business and tech, mostly in startups. I'm well versed in agile and remote team management. Most recently, VP of Eng for a Financial Tech startup. My passion has been programming for as long as I can remember and I'm really good at it; I can make things quickly or I can make things correctly and I try to make sure you know which one you're getting when we work together. My strengths include: * Back-end server programming and provisioning. I'll setup / configure your servers for you, design the architecture of your application, and build it using the latest framework (Laravel or Rails 5). Can optimize for speed or for quality well-documented, maintainable code - you pick * Data scraping and analysis. I've written web scrapers in Ruby and Node.JS. I've architected and built a custom analytics system also * Getting everybody's expectations on the same page My coolest projects: * Ayalo, A product aggregator for traditional retail stores in Guatemala and Mexico. I built the first version of the product (3 systems in different languages / frameworks), then built a team of 5, and managed them + built alongside them. * A custom analytics system (internal to Ayalo) that includes data warehouse design, ETLs, URL-based page tracking, and custom event tracking. Basically, record everything then see what we can learn :) * Callback counter for Node - github:frankpinto/canicas
JavaScript
Project ManagementReactCSS 3PostgreSQLRuby on RailsRubyPHPLaravelNode.js - $15 hourly
- 0.0/5
- (0 jobs)
I specialize in Japanese to English translations for marketing materials, product descriptions, and business emails. My clients have included tourism companies, tech startups, Amazon sellers, educators, and pharmaceutical companies. In addition, I have been teaching business English to clients for over 10 years. I am well versed in the structure and importance of tone in business emails. If you are looking to emphasize precision in your technical product descriptions or convey the message of your marketing materials accurately and naturally, I would be happy to work with you! Education/Certification: - Central Connecticut State University: - MS, TESOL & Applied Linguistics 2011 - BS, Mechanical Engineering Technology 2008 - JLPT N1 Certification Specializations: - Marketing - Tourism - IT / Software - Academic (Humanities) - Education Recent Sample Projects (technical) - Amazon product descriptions (sports, tools, clothing, hobbies, heat laminators) - website content for a robotics startup Recent Sample Projects (marketing) - marketing copy for an upscale sake brand - marketing copy for tourism in Fukumaki and Lake Koyama, Japan - voiceovers for a CM advertising the Minami Sanriku coastal area of Japan Recent Sample Projects (education) - science curriculum documents for a Special Needs School - recommendation letters and personal essays for MBA applicants - abstracts for research studies on walking habits during COVID-19, project-based learning in elementary classrooms, clinical trials Whether you need to convey a literal, technical translation of Japanese content, or express a more subtle nuance in an email to a client, I can provide quick turnaround times with exceptional attention to detail and accuracy in communicating your marketing message from Japanese to English. I am more than happy to take into consideration any special needs a translation may have, including the tone and level of formality you would like to be expressed in the final translation. Thank you for viewing my profile, and I look forward to possibly working with you!
JavaScript
HTMLJapanese to English TranslationCSSEnglish - $40 hourly
- 0.0/5
- (0 jobs)
Objective Motivated and versatile professional with a background in technology and operations, seeking to leverage skills in software engineering and web development. Skilled in problem-solving, communication, and project management, with a passion for innovative solutions and continuous learning.
JavaScript
ExpressJSNode.jsGitHubPythonCSS 3HTML Want to browse more freelancers?
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