Hire Developers with Popular Programming Languages

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Upstaff connects top-tier engineers proficient in a variety of programming languages, ensuring your projects are powered by the right expertise, from Python and Java to JavaScript and beyond. Hire dedicated developers with the skills your business needs, seamlessly.
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JavaScript 8yr.
React 8yr.
TypeScript 5yr.
Node.js 5yr.
Next.js 3yr.
Redux 4yr.
PHP 1yr.
React Native 1yr.
Angular
AngularJS
Backbone.js
Express
jQuery
Koa.js
NestJS
Angular CLI
ngFor
ngIf
NgRx
ngrx-forms
ngSwitch
React Bootstrap
reactive-forms
Redux-Saga
RxJs
Webpack
Angular Material UI
Ant Design
Material UI
Cordova
Ionic
AWS ElasticSearch
FireStore
MongoDB
MySQL
NoSQL
PostgreSQL
Redis
Sequelize
SQL
AWS
AWS EC2
AWS Lambda
AWS S3
Blockchain
Apache HTTP Server
Nginx
API
GraphQL
RESTful API
Conflict Management
Emotional Intelligence (EI)
Mentor Aptitude
Team Management
Team Management Skills
DeFi
Fortmatic
MetaMask
NFT
Smart Contract
Subsquid
Wallet Link
Web3
Docker
Kubernetes
MVC
REST
WebRTC
WebSockets
WordPress
...

10+ years of experience in web development, M.Sc in Software Engineering, GAI, LLMs Front-End: Angular, React, Vue.js (JavaScript & TypeScript) Back-End: Node.js, Next.js, TypeScript , PHP Mobile: React Native AWS Cloud infrastructure Control systems (e.g., Git) and familiarity with DevOps practices for continuous integration and deployment (CI/CD). Unit testing, integration testing, and end-to-end testing. Experience leading and mentoring a team of developers, including assigning tasks, providing guidance, and ensuring the team's success. Ability to motivate and inspire team members, resolve conflicts, and provide constructive feedback. Experience conducting assessments and interviews remotely.

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Seniority Architect/Team-lead
Location Ukraine
AWS big data services 5yr.
Microsoft Azure 3yr.
Python
ETL
AWS ML (Amazon Machine learning services)
Keras
Machine Learning
OpenCV
TensorFlow
Theano
C#
C++
Scala
Apache Spark
Apache Spark 2
Big Data Fundamentals via PySpark
Deep Learning in Python
Linear Classifiers in Python
Pandas
PySpark
.NET
.NET Core
.NET Framework
Apache Airflow
Apache Hive
Apache Oozie 4
Data Analysis
Superset
Apache Hadoop
AWS Database
dbt
HDP
Microsoft SQL Server
pgSQL
PostgreSQL
Snowflake
SQL
AWS
GCP
AWS Quicksight
AWS Storage
GCP AI
GCP Big Data services
Kafka
Kubernetes
OpenZeppelin
Qt Framework
YARN 3
SPLL
...

- Data Engineer with a Ph.D. degree in Measurement methods, Master of industrial automation - 16+ years experience with data-driven projects - Strong background in statistics, machine learning, AI, and predictive modeling of big data sets. - AWS Certified Data Analytics. AWS Certified Cloud Practitioner. Microsoft Azure services. - Experience in ETL operations and data curation - PostgreSQL, SQL, Microsoft SQL, MySQL, Snowflake - Big Data Fundamentals via PySpark, Google Cloud, AWS. - Python, Scala, C#, C++ - Skills and knowledge to design and build analytics reports, from data preparation to visualization in BI systems.

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Seniority Expert (10+ years)
Location Ukraine
Rust
Solana
AI
C#
Java
Kotlin
Objective-C
Python
Swift
TypeScript
Crashlytics
Metal
Lodash
Node.js
React
Slim
Aurora
PostgreSQL
SQL
AWS
GCP
AWS Lambda
Cloud Functions
Blockchain
Anchor
ETH (Ethereum blockchain)
NFT
Smart Contract
API
Linux
macOS
Modbus
Packet Filter
Postfix
Teleport
Nginx
Perl
UX
Akamai Cloud
ALT
Borsh
CPI
Flows
IBM Cloud
Linea
Metaplex
Minting
Mobile App
Nonce
Partial Signatures
Secret Manager
Serde
Token-2022
...

- Senior Blockchain Engineer with 20+ years in software development and a strong track record in the Solana ecosystem; - Experienced in Rust for Solana smart contract development, with extensive experience building on-chain programs for DeFi, staking, NFT, and messaging platforms; - Skilled in full-stack development: React and TypeScript for front-end dApps, Node.js and Python for backend systems; - Experience with AWS and Google Cloud for scalable cloud applications and infrastructure; - Ability to lead teams and manage projects, including migrating Ethereum products to Solana (Community Gaming); - Skilled in blockchain frameworks and tools: Anchor, CPI, Metaplex, Token-2022; - Strong SQL background with hands-on experience in PostgreSQL, MySQL, and SQLite; - Experienced in system architecture, Linux server administration, and distributed applications; - Notable achievements include leading Solana product delivery for NeuralBond (on-chain messaging) and Palus Finance (staking platform).

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Seniority Expert (10+ years)
Location Mexico
PostgreSQL 5yr.
REST 5yr.
TypeScript 3yr.
Python
Go
Gin 5yr.
GORM 5yr.
CSS 5yr.
HTML 5yr.
Zend 5yr.
Docker 5yr.
Git 5yr.
Microsoft Visual Studio Code 5yr.
Gorilla Mux 3yr.
Node.js 3yr.
WebSockets 3yr.
Google Maps API 3yr.
Expo.io 2yr.
Kubernetes 2yr.
Akka Streams 1yr.
Apache Spark 1yr.
ASP.NET MVC Pattern 1yr.
ASP.NET WebForms 1yr.
Entity Framework 1yr.
.Net WCF 1yr.
ATL 1yr.
MFC 1yr.
jQuery 1yr.
XML 1yr.
RubyMine 1yr.
Apache Hive 1yr.
Apache Nifi 1yr.
AWS ElasticSearch 1yr.
Bigtable 1yr.
CockroachDB 1yr.
Microsoft SQL Server 1yr.
MongoDB 1yr.
Oracle Database 1yr.
GCP 1yr.
Dataproc 1yr.
Google BigQuery 1yr.
Google Cloud Pub/Sub 1yr.
Consul 1yr.
REST C++ SDK 1yr.
Qt Creator 1yr.
STL 1yr.
Boosting 1yr.
ChromeDP 1yr.
Assembler
Assembly
C
C#
C++
Java
JavaScript
Kotlin
Ruby
Swift
X++
chi
flax
Google JAX
Grok
JAX
LangChain
NumPy
OpenAI
PyTorch
Spacy
TensorFlow
xAI
MS Dynamics 365
Beego
Echo
Gramework
Boost
Cross-platform UI
Django
FastAPI
Flask
Pandas
React Hooks
Apache Airflow
LightGBM
moving pandas
Aerospike
FoundationDB
Memcached
MySQL
Redis
AWS
Azure
MS Azure
Microsoft Power Platform
Azure DevOps Server (ex TFS Team Foundation Server)
Kitura
Bash
PowerCLI
PowerShell
Centos
FreeBSD
Linux
macOS
Windows
fasthttp
GRPC
NAT
Networking
Design patterns
Observer
Qemu
OpenAPI
Swagger
Mercurial
SVN
Grafana
Prometheus
Zabbix
Qt Framework
Visual Studio
NATS
RabbitMQ
Selenium
TFS
Code Blocks
DAG
fasthhtp
logrus
Multi-threading
Quart
Tesseract OCR
zap
...

* Master’s Degree in Computer Science * 19 years in Software Engineering: Python, Kotlin, Swift, C/C++, and TypeScript in software engineer, team lead, and software architect roles. * Data processing with numpy, pandas, moving pandas, airflow, spark,and nifi. * Designed and implemented a scalable multi-microservice backend for an enterprise AdTech CRM, integrating 10+ third-party services and streamlining client management operations. * Built and deployed a billing system for a money exchange platform, integrating third-party payment systems and delivering a user-friendly web interface for seamless transactions. * Optimized data processing pipelines by implementing quantiles on streams, enabling real-time analytics and supporting large-scale data operations for scientists and business stakeholders. * Extensive background in data processing and reporting. Good abilities in SCM tools like Git, and in multi-threading and networking. Strong skills in Docker, gRPC; * Cloud service platforms: AWS, Google Cloud, and MS Azure; * Experience with DBMS, PostgreSQL, MySQL, MongoDB; * Certificated knowledge of Blockchain; * Certified Senior Go Engineer (12 years with GoLang).

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Seniority Expert (10+ years)
Location Ukraine
Python
Computer Vision (CV)
Pandas
ML
AI
Deep Learning
Hugging Face
Keras
Kubeflow
Mlflow
NLP
NumPy
OpenCV
PyTorch
Scikit-learn
Spacy
TensorFlow
Matplotlib
NLTK
Plotly
poetry
SciPy
Streamlit
DVC
MySQL
AWS RT
GCP Storage
Google BigQuery
CI/CD
Jenkins
Docker
Git
Payment Gateways
Regexp
Sublime Text
argparse
Custom API
Deep Learning (DL)
Kubeflow for ML pipelines
Label Studio
MMCV
ONNX
Recommender Systems
tf-serving
Voxel51
YOLO
...

Data Science engineer with over 3 years of practical commercial experience in Natural Language Processing (NLP), Computer Vision (CV), and Recommender Systems. Available skills in data analysis using machine learning approaches to satisfy business needs, problem-solving, and other tasks in this sphere. A person, focused on obtaining the best results, using all knowledge and skills. Friendly and ready to help the team complete tasks and solve certain problems.

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Seniority Middle (3-5 years)
Location Ternopil, Ukraine
Data Analysis 10yr.
Python
Prompt Engineering
C#
Elixir
JavaScript
R
NumPy
TensorFlow
ASP.NET Core Framework
ASP.NET MVC Pattern
Entity Framework
caret
dplyr
rEDM
tidyr
dash.js
Flask
Matplotlib
NLTK
Pandas
Plotly
SciPy
Shiny
Basic Statistical Models
Chaos Theory
Cluster Analysis
Decision Tree
Factor Analysis
Jupyter Notebook
Linear and Nonlinear Optimization
Logistic regression
Multi-Models Forecasting Systems
Nearest Neighbors
Nonlinear Dynamics Modelling
Own Development Forecasting Algorithms
Principal Component Analysis
Random Forest
Ridge Regression
Microsoft SQL Server
PostgreSQL
AWS
GCP
Anaconda
Atom
R Studio
Visual Studio
Git
RESTful API
Windows
...

- 10+ years in Forecasting, Analytics & Math Modelling - 8 years in Business Analytics and Economic Processes Modelling - 5 years in Data Science - 5 years in Financial Forecasting Systems - Master of Statistics and Probability Theory (diploma with honours), PhD (ABD) - BSc in Finance - Strong knowledge of Math & Statistics - Strong knowledge of R, Python, VBA - Strong knowledge of PostgreSQL and MS SQL Server - 3 years in Web Development: Knowledge of C#, .Net and JavaScript for web development - Self-motivated, conscientious, accountable, addicted to data processing, analysis & forecasting - Engineering, Understanding AI and LLMs

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Seniority Senior (5-10 years)
Location Ukraine
Python 5yr.
Django 3yr.
Mobile development
Flask
API
FastAPl 5yr.
QA Automation 3yr.
Parse 2yr.
RPA 2yr.
DDOS protection
Solidity
Threads
Aiogram
AsyncIO
pytest
Tortoise ORM
Web3.py
CSS
HTML
FastAPI
Mini-Apps
NestJS
Node.js
React
MariaDB
MongoDB
MySQL
PostgreSQL
Redis
SQL
SQL Alchemy
SQLAlchemy
pyTelegramBotAPI
RESTful API
Telegram API
Celery
Kafka
Crypto Services
TON
TonKeeper
Web3
cyber security
Selenium
Docker
Kubernetes
FDD
serverless
Jinja2
Project Management
Telegram Mini Apps
Ubuntu
VPN
BATM
Multiprocessing
...

- Python Developer with 5+ years of experience in backend development and automation: Django (3 years), Flask, and Fast API for web application development; - Maintaining and supporting production systems using FastAPI and SQLAlchemy, API integrations including financial services and crypto platforms; - Built and supported Telegram bots and automation tools for business operations; - Docker containerization: Docker-compose, Docker via Render (serverless). Deployment and Linux server management (Ubuntu); - Familiar with data reporting and basic analytics through internal monitoring tools; - Open to part-time and distributed team environments with a focus on ongoing system support. - Reached the Top 10 freelance Python engineers on the local market at the age of 17 (showcasing early talent and initiative). - Worked on projects with a multi-million user base, contributing to scalable architecture and high-load system stability. - Successfully launched an educational platform in the USA, now actively used by students, tutors, and academic institutions. - Represented the dev team at the international Wefi Beyond Banking Summit, delivering a product presentation to a global fintech audience.

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Seniority Middle (3-5 years)
Location Ternopil, Ukraine
Scala
NLP
Akka
Apache Spark
Akka Actors
Akka Streams
Cluster
Scala SBT
Scalatest
Apache Airflow
Apache Hadoop
AWS ElasticSearch
PostgreSQL
Slick database query
AWS
GCP
Haddop
Microsoft Azure API
ArgoCD
CI/CD
GitLab CI
Helm
Travis CI
GitLab
HTTP
Kerberos
Kafka
RabbitMQ
Keycloak
Swagger
Kubernetes
Terraform
Observer
Responsive Design
Unreal Engine
...

Software Engineer with proficiency in data engineering, specializing in backend development and data processing. Accrued expertise in building and maintaining scalable data systems using technologies such as Scala, Akka, SBT, ScalaTest, Elasticsearch, RabbitMQ, Kubernetes, and cloud platforms like AWS and Google Cloud. Holds a solid foundation in computer science with a Master's degree in Software Engineering, ongoing Ph.D. studies, and advanced certifications. Demonstrates strong proficiency in English, underpinned by international experience. Adept at incorporating CI/CD practices, contributing to all stages of the software development lifecycle. Track record of enhancing querying capabilities through native language text processing and executing complex CI/CD pipelines. Distinguished by technical agility, consistently delivering improvements in processing flows and back-end systems.

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Seniority Senior (5-10 years)
Location Ukraine

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Table of Contents

Types of Programming Languages:

  1. Low-Level Languages:
    • Machine Language: Directly executed by the computer’s CPU; written in binary (0s and 1s).
    • Assembly Language: Uses symbolic representations of machine instructions, requiring an assembler to convert to machine code.
  2. High-Level Languages:
    • Easier for humans to read and write; translated to machine code by compilers or interpreters.
    • Examples: Python, Java, C++, JavaScript, Ruby.
  3. Scripting Languages:
    • Designed for automating tasks within other software.
    • Examples: Python, JavaScript, Perl.
  4. Markup and Query Languages:
    • Focused on structuring and managing data rather than performing computations.
    • Examples: HTML, XML, SQL.
  5. Domain-Specific Languages (DSLs):
    • Tailored for specific applications or domains.
    • Examples: MATLAB (for mathematical computations), R (for data analysis).
  6. Object-Oriented Languages:
    • Focus on objects (data structures containing data and methods).
    • Examples: Java, C++, Python.
  7. Functional Languages:
    • Emphasize mathematical functions and immutability.
    • Examples: Haskell, Scala.
Table of Contents

Talk to Our Expert

Our journey starts with a 30-min discovery call to explore your project challenges, technical needs and team diversity.
Manager
Maria Lapko
Global Partnership Manager

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