Hire the best Unit Testing Specialists in Warsaw, PL

Check out Unit Testing Specialists in Warsaw, PL with the skills you need for your next job.
  • $55 hourly
    I'm a Senior Software Engineer with over 9 years of experience, I have gained extensive expertise in designing and implementing high-quality software solutions that meet the client's business requirements. Throughout my career I was working on multiple projects, here I'm sharing three of the most challenging ones: At UBS (a Swiss bank with a $60bln capitalization), I was a Senior Java Developer, and I was responsible for developing a regulatory reporting engine to handle dozens of millions of transactions the bank processes daily. This project was part of implementing their new business requirements around designing a project on an entirely new event-driven technological stack. There were several main challenges that I faced when designing and implementing the system: 1. System should handle millions of transactions per day that have to be reported in a timely manner. 2. System should be tolerant to hardware failures, including the loss of the entire data center. 3. Around 40 developers should be able to work on the project productively with minimal conflicts. 4. Correctness of reporting is essential – every introduced bug can have disastrous consequences – the system should have checks in place that prevent buggy code from being deployed to production. 5. Transaction reporting domain is very complicated, and business requirements are frequently changing. System design should be flexible enough to adjust to the required changes. 6. There are multiple stakeholders involved; each has different requirements for the system. At Denario, a fintech startup, I worked as a Senior Java Developer, assuming full responsibility for designing, developing, deploying, and maintaining the application and DevOps tasks. The main challenges in the projects were: 1. Developing a high-performance system 2. Integrating with multiple Open Banking providers 3. Ensuring the platform was scalable, fault-tolerant, and highly available 4. Ensuring the platform was secure and user data was protected 5. Collaborating with the product team to design features that met users' needs 6. Maintaining the platform and fixing issues that arose in production 7. Assuming full responsibility for the end-to-end software development process At the Ministry of National Defense of Poland, I was a Team Leader and Technical Leader responsible for providing e-learning solutions for hundreds of thousands of users. My role involved leading a team of developers, analysts, and testers to develop and maintain a learning management system. I have experience working with a variety of technologies, including: Java, Spring Framework, Spring Boot, Hibernate, JUnit, Spock, Apache Flink, Kafka, PostgreSQL DB, Oracle SQL DB, Elasticsearch, Microsoft Azure, Kubernetes, AWS I am passionate about software development and strive to stay up-to-date with the latest trends and technologies. I am dedicated to delivering high-quality solutions and exceeding client expectations.
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    API
    Spock
    Java
    Spring Framework
    JUnit
    Linux
    Apache Kafka
    SQL
    Bash Programming
    Spring Boot
    Linux System Administration
    Bash
  • $50 hourly
    As a Symfony Full Stack Developer I'm comfortable operating across various tech stacks and languages, such as PHP, JavaScript, TypeScript, and frameworks like Symfony. Currently, my professional goals are focused on mastering Symfony and React to keep up with the current advancements in our software development industry. I am a part of the Polcode team, a Polish software development company established in 2006 with over 150 developers, designers, project managers, DevOps and QA specialists onboard. This means that besides my programming skills you always have access to a full-stack product design & development team. My technical expertise: - Code quality: Acceptance Tests, Unit testing with PHPUnit, PSR Standards, Design Patterns - Version Control System: Git (Github, GitLab, Bitbucket) - Issue Trackers: JIRA, Redmine, Trello My technology stack: - Backend: PHP, Symfony, Doctrine, Twig, Composer - Frontend: HTML5, CSS, SCSS, Less, Twitter Bootstrap, React, JavaScript, TypeScript, ECMA6, Assets minimization & optimization tools: Uglifyjs, UglifyCss, OptimizeCss, Building tools: Webpack, Yarn, Bower, Gulp, Grunt - Databases: MySQL, PostgreSQL - Other: DotPay, PayU, SMSAPI, Linux, macOS, Docker, PhpStorm, vim, bash My approach: - Writing clean code with OOP in mind (SOLID) - Very good communication and teamwork - Experience in coordinating and planning teamwork - I am eager to advise my customers. More about Polcode Polcode provides customized software solutions for startups, SaaS companies, eCommerce stores, and enterprise clients worldwide. From building the product from scratch to extending the existing teams, we have expertise in a diverse set of open source technologies and platforms to bring innovation in an agile fashion. Our team excels in PHP, Symfony, Laravel, Magento, Go, React Native, React.js, Vue.js, Ruby on Rails and Angular. With over 150 people, Polcode has either empowered client teams or delivered end-to-end development projects for brands from fintech, manufacturing, consulting, eCommerce, marketing or eLearning industries and is recognized as Top Developer in Poland by Clutch. Looking forward to our cooperation! Krzysztof, Polcode Dev Team
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    Symfony
    Elasticsearch
    JavaScript
    HTML5
    PHPUnit
    MySQL
    React
    Bootstrap
    SQL
    PHP
    TypeScript
    Docker
  • $87 hourly
    💻Senior Blockchain Solidity Smart Contracts Engineer and Auditor with exceptional Experience💻. Ask for my CV!📄. 🛠About me: 🔭 Artizen.Fund Early Adopter. ⛓ OpenArtMarket.com Pioneer Solidity Smart Contracts Developer. 📊 AngelBlock.io Early Investor. ✅I have great experience working on Complex N.F.T.s Projects and Platforms, including N.F.T.s linked to Real Life ArtWorks. ✅Low Gas Consumption and Security are my Crucial Focus when Developing and/or Auditing Smart Contracts. ✅I Developed projects for +13 clients on UpWork with an average rating of 5/5. 📈I always define Clear Scope projects and I prefer to establish Long-Term Business Relationships with Clients when possible.📈 -⛓⚙️🔧I can help you with the Development, Modification and Auditing and Deployment on Ethereum/Polygon/B.S.C./ETC of Smart Contracts in Solidity like: ⚙️ Ethereum ERC-20/B.S.C. BEP-20 Tokens. ⚙️ NFTs (ERC-721/ERC-1155) either Single or a whole Collection with its own Generative ArtWork and MetaData, Minting, Selling, Pre-Sale, I.C.O. Smart Contracts and more!!!. ⚙️NFT Games Smart Contracts. ⚙️ Integrations with De.Fi. Protocols. ⚙️ ERC-777 Tokens. ⚙️ ERC-884 Tokens. ⚙️ DAOs. ⚙️ Auditing Solidity Smart Contracts in Search of Safety Vulnerabilities, Gas Spending and Implementations of Good Practices. ⚙️ Add I.P.F.S. Technology to your Project. ⚙️ And More!!! The Moon is the Limit, just ask about the features that you want😉. 📓My Skills Include Javascript, Typescript, Solidity, Git Console, Hardhat, Truffle Suite, Ethers.js, Web3.js, Open Zeppelin Library, Unit Testing(with Mocha & Chai), Slither and Mythril, ChainLink and I.P.F.S Client as Main Skills; HTML5, CSS3, Bootstrap 4, Material-UI, SASS, React.js Hooks, Redux and Vue.js on the Front-end and I also have Basic Knowledge in Node.js, Express.js, MongoDB and Mongoose on the Back-end as Secondary Skills.📓 📓I have knowledge of Full Stack Web Development but I prefer to Specialize in Blockchain and Solidity Smart Contracts Development Technologies.📓 🎈I think there is nothing better than a "Let's do it!"🙌🏼 attitude when working with a good team on a project. 📔I feel very comfortable teaching things to others and could even lead teams. 📈Passionate about Investments, E-Sports and Economics. 📚I am very ambitious and curious and I am continually learning new things. ✔️See my (public) work and projects:_ ⛓GitHub:_ Nachoxt17 🖥LinkedIn:_ Ignacio Ceaglio ⚙️Let's proceed to establish the Details, Requirements, Payment Schedules and Delivery Times of your Project in an UpWork Contract, and then activate the 1st Milestone, so I will be committed to your project.⚙️ ⚠️IMPORTANT⚠️: If you want me to estimate a Fixed and Accurate Time and Cost for the Development of your Project, I will need you to Provide me with Equal Accurate and Fixed Details about the Features and Requirements of your Project, and that we write them in detail in the UpWork Contract before we Start Working along with the same Detailed Payment Schedule.
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    Startup Consulting
    Blockchain, NFT & Cryptocurrency
    Truffle
    Business with 1-9 Employees
    React
    HTML
    Ethereum
    TypeScript
    JavaScript
    Smart Contract
    Blockchain Development
    Blockchain Security
    Solidity
    web3.js
  • $45 hourly
    Desired position ------------------------------------ Senior iOS Software Engineer Schedule: part-time, full-time
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    Lottie
    Multithreaded Programming
    Git
    AV Foundation
    SwiftUI
    HealthKit
    Push Notifications
    Core Bluetooth
    Realm Database
    StoreKit
    Objective-C
    Apple Xcode
    Swift
    iOS
  • $35 hourly
    Hello! I’m a dedicated mobile application developer with a passion for crafting intuitive and efficient iOS and Android apps. With a background in computer science and extensive experience in both native and cross-platform technologies, I bring a blend of technical expertise and creative problem-solving to every project. I take pride in my ability to understand client needs and translate them into seamless mobile experiences. Whether it’s building from scratch or improving an existing app, I’m committed to delivering high-quality results that align with your business objectives and exceed user expectations.
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    MVC Framework
    CI/CD
    Agile Project Management
    Git
    Firebase
    RESTful API
    UI/UX Prototyping
    Xamarin
    React Native
    Flutter
    Kotlin
    Java
    Objective-C
    Swift
  • $35 hourly
    As a devoted Junior Java Developer, I'm all about diving into challenges with a fresh outlook and loads of enthusiasm. Java is my go-to tool—it's super strong and flexible, making it perfect for working on all kinds of projects, whether they're cool web apps or the behind-the-scenes systems that keep everything running smoothly.
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    REST API
    Apache Kafka
    Docker
    Python
    C#
    HTML
    SQL
    PostgreSQL
    Hibernate
    Spring Framework
    Java
    Application
    Desktop Application
    Web Application
  • $35 hourly
    I am an engineer with diverse experience in embedded systems development. My key skills include: C programming with the ability to implement OOP paradigms within the C language Unit testing in C/C++ (Cmocka/GTest GMock) Building projects using makefile Configuring Docker for your project PCB layout in CAD software Altium Designer Manual assembly of printed circuit boards
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    Docker
    C
    C++
    Embedded System
    Altium Designer
  • $50 hourly
    I'm a Senior Software Engineer with a focus on product development. More than 10 years of experience in IT industry developing mid to large scale web applications. I have experience in both backend (including cloud) and frontend development, although my current focus is primarily on frontend. My expertise can help your business in achieving a balance between scalable technical solutions and the fast delivery of value to customers. In addition to my programming skills, I have extensive experience in conducting tech interviews. Therefore, I am well-equipped to facilitate technical interviews for your project to evaluate candidate skills. Firmly believe that soft skills are as crucial as technical ones.
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    Candidate Interviewing
    Google Chrome Extension
    End-to-End Testing
    CI/CD
    Amazon Web Services
    Node.js
    React
    TypeScript
    JavaScript
    Analytics
    Product Development
    Front-End Development
  • $50 hourly
    I have been immersed in the .NET ecosystem since the early stages of my career, collaborating on diverse projects across industries such as telecommunications, industrial automation, insurance, and legal services. One of my notable achievements includes leading a team in building a web application from scratch for the legal department. In this role, I applied Clean Architecture principle and implemented the Mediator pattern, contributing to the project's success. With a strong commitment to staying at the forefront of technology, I recently achieved the AZ-900 certification in Azure. Looking ahead, my goal is to deepen my expertise in cloud solutions, and I am currently preparing for the AZ-204 exam. Beyond certifications, I actively pursue continuous self-improvement through courses, conferences, and reading books. For instance, during the .NET Developer Days conference, I gained valuable insights into proper logging techniques, which I promptly applied to optimize Azure Functions at work. I am passionate about leveraging my skills to assist clients in migrating their data to the cloud and am eager to contribute my technical acumen and problem-solving abilities to future projects.
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    PrimeFaces
    Clean Architecture
    Git
    PostgreSQL
    Microsoft SQL Server
    Angular
    ASP.NET Core
    Postman
    REST API
    Integration Testing
    TypeScript
    Microsoft Azure
    C#
    .NET Framework
  • $15 hourly
    I'm No-code developer. I build mobile applications and websites with No-code. Work with Glide, Adalo, FlutterFlow. I also have practical skills and experience in Python, Django Framework. Looking for new job opportunities in Software development.
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    Keras
    TensorFlow
    Machine Learning
    Back-End Development
    SQL
    Git
    CSS
    HTML
    Software Development
    Python
    Django
    Mathematics
  • $15 hourly
    👋 Welcome to my Profile 👋 Hi ! My name is Izzat, and I'm a Python Developer with over 2 years of experience, focused mostly on Web Development, API Development, API Integration, Bug Fixing, and buildings Apps from scratch. My Core Skills include: 📌 Python 📌 Java 📌 Django, FastAPI, Django Rest Framework 📌 SQL, PostgreSQL, MongoDB 📌 AWS, Docker, Redis 📌 Tailwind, Bootstrap, HTML, CSS ❓ Why Choose Me: 🔸 Quality Assurance: I am committed to delivering high-quality solutions that meet client requirements and exceed expectations. 🌟 🔸 Communication: I believe in clear and open communication throughout the development process, ensuring transparency and collaboration. 📞 🔸 Timely Delivery: I understand the importance of deadlines and strive to deliver projects on time, without compromising on quality. ⏱️ If you're interested in working with me, feel free to contact me at any time!
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    HTML5
    CI/CD
    Docker
    Testing
    HTTP
    GitHub
    Git
    PostgreSQL
    SQL
    RESTful API
    Flask
    FastAPI
    Django
    Python
  • $25 hourly
    I’m a developer experienced in building websites for small and medium-sized businesses. Whether you’re trying to win work, list your services, or create a new online store, I can help.
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    React
    .NET Framework
  • $30 hourly
    As an iOS Software Engineer, I develop and maintain multiple iOS applications using SwiftUI and UIKit, delivering high-quality and user-friendly solutions. I have contributed to the development of a new iOS app from concept to launch, collaborating with a team of designers and backend developers. I also conduct thorough testing, debugging, and code reviews to ensure code quality and adherence to best practices. With a Bachelor's degree in Applied Mathematics from Yanka Kupala State University of Grodno, I have a strong foundation in logic, problem-solving, and analytical thinking, which I apply to my iOS development projects. I have over five years of experience in developing innovative and user-friendly mobile applications, using Swift and Objective-C, and various iOS frameworks, such as UIKit, SwiftUI, Core Data, and Combine. I have successfully developed and launched several iOS applications that have garnered positive user feedback and achieved
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    Git
    Data Structures
    Algorithms
    Clean Architecture
    Reactive Programming
    SwiftUI
    CI/CD
    Objective-C
    Core Data
    Swift
    iOS
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