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  • API
  • Programming
  • App Development
  • JavaScript
  • Software Development
  • App & Mobile Programming
  • Mobile App Development
  • Mobile App Marketing
  • Object Oriented Programming
  • Python
  • React Native
  • Cloud Computing
  • Payment Gateway Integration
  • Node.js
  • React

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  • Python programming

    $50/hr Starting at $1K Ongoing

    Dedicated Resource

    9 years of experience as a Python developer. Writing scalable code using Python programming language. Testing and debugging applications. Developing back-end components. Integrating user-facing elements...

    APICloud ComputingData ExtractionData ManagementDjango
  • AL/ML integration

    $40/hr Starting at $100 Ongoing

    Dedicated Resource

    AI and machine learning are not buzzwords anymore; they’re integral components of modern software development, setting new standards for functionality and performance. From predictive algorithms to automated...

    Artificial IntelligenceMachine LearningModelingProgrammingPython
  • LLM API integration Specialist

    $35/hr Starting at $500 Ongoing

    Dedicated Resource

    As an LLM API Integration Specialist, my primary responsibility is to seamlessly integrate large language model APIs into various applications, ensuring they enhance functionality and user experience...

    APIApi IntegrationArtificial IntelligenceChatbotsGo Programming
  • PACS & DICOM viewer software development

    $50/hr Starting at $10K Ongoing

    Dedicated Resource

    Custom PACS & DICOM Software Services for Hospitals, Imaging Centers, Physician Practices & other healthcare providers. developing PACS & DICOM viewer software platforms particularly designed for sharing,...

    C#C++Clinical AffairsDICOMEhr
  • Node/Nest.js back-end development

    $50/hr Starting at $5K Ongoing

    Dedicated Resource

    At least 5+ years of experience with Node.js/Nest.js Working perfect with TypeScript. Hands-on expertise in REST, MySQL/PostgreSQL, WebSocket, MongoDB, Redis. Good experience with Prisma, TypeORM, Graphql...

    Amazon Web Services (aws)APIAWS CognitoJavaScriptMachine Learning
  • Fitness App development

    $35/hr Starting at $25K Ongoing

    Dedicated Resource

    Fitness mobile app development Activity tracking, Nutrition and diet app, Workout fitness app, Yoga & Meditation app development using React Native, Ionic, Kotlin, Swift, Cordova. App main features: Onboarding,...

    Android AppApp & Mobile ProgrammingApp DevelopmentApple WatchCustomer Service

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Full Stack Software engineer

I am Oleg Teslenko, a software engineer with 9 years of full stack development experience.
I'm a senior-level, full-stack web developer who works with a flexible stack of frontend and backend technologies and has a deep understanding of best practices for web application architecture.
I believe in offering premium quality work to win long-term relationships with clients. I'll put my heart and soul into whatever work is assigned to me to meet your expectations.
My goal is to always perform at an exceptional level for all project that I will work.
I strive to delight my clients with every project I undertake, and I would love to do the same for you.
These are my main skills and responsibilities

• Design, develop, and test web and mobile applications.
. Infrastructure architecture, and management for the application.
• Writing maintainable and scalable code.
• Collaborate with Customers directly to imagine, design, develop, test, and launch the software.

- Front-end: React.js, Vue.js, Angular, Nuxt.js, Next.js, Gatsby.
- Back-end: Python, Django, Node.js, Nest.js, Ruby on Rails, Serverless framework
- Mobile: React Native, Ionic, Kotlin, Swift, Xamarin, Java
- AWS, GCP, Azure, Digital Ocean

Work Terms

Full Time Available
40-50 hours per week