Nenad is available for hire

Nenad Spuzic

Verified Expert in Engineering

Software Developer

Location

Belgrade, Serbia

Toptal Member Since

March 6, 2017

Nenad is a seasoned technology executive, product leader, and engineer with over a decade of experience bringing innovative software products to the market and helping people grow. Nenad's expertise spans engineering management, team leadership, agile project management, cloud services, machine learning, and DevOps.

Third-party APIs Full-stack Development Web Development Web App Development Back-end Back-end Development Full-stack Authentication Front-end Integration User Experience (UX)User Interface (UI)Security Code Review Amazon RDS

Portfolio

Eight Dots

React, Angular, Mobile Apps, React Native, Data Science, Web Development...

Wellbit

Technical Leadership, Business, Financing, Agile, CTO, DevOps...

VPN Security (Freelance Clients)

Back-end, Databases, WireGuard, Architecture, iOS, Android, React Native...

Experience

Engineering Management - 7 years Agile Project Management - 7 years CTO - 7 years Software Architecture - 7 years Solution Architecture - 6 years Microservices - 6 years Artificial Intelligence (AI) - 3 years Machine Learning - 3 years

Availability

Part-time

Preferred Environment

Agile Software Development, Microservices, Amazon Web Services (AWS), Solution Architecture, Enterprise, Full-stack Development, Azure, Google Cloud, Big Data, Artificial Intelligence (AI)

The most amazing...

...the team I've led developed a microservice-based data analytics and visualization solution used by enterprise corporations to gain invaluable business insights.

Work Experience

CTO

2017 - PRESENT

Eight Dots

Led a team of developers—providing leadership and solutions in terms of software architecture, software development process, and implementation.
Performed DevOps consultation and support for clients to design, maintain, and operate scalable, high-performance, and high-availability infrastructure for operating numerous software services available to clients around the globe.
Conducted security reviews and penetration testing of various types of software.
Implemented a number of high-performance, scalable mobile and web applications with computer vision capabilities.

Technologies: React, Angular, Mobile Apps, React Native, Data Science, Web Development, Machine Learning, JavaScript, Java, Scala, .NET Core, C#, Computer Vision, Artificial Intelligence (AI), Big Data, Amazon EC2, Security, MongoDB, PostgreSQL, Amazon Web Services (AWS), iOS, Architecture, Stream Processing, Object-oriented Design (OOD), Object-oriented Programming (OOP), Functional Reactive Programming, Amazon, Application Security, Certified Scrum Developer, Apache Kafka, OCR, WebSockets, SBT, Data Processing, RabbitMQ, Actor Programming, Digital Signal Processing, AMQP, Web App Development, OOP Designs, Web Architecture, Scrum, Agile, Team Management, Distributed Team Management, Data Structures, Microservices, Distributed Caches, Concurrent Programming, Test-driven Development (TDD), Heroku, Apache Spark, Android, Docker, SaaS, Bash, SQL, MATLAB, NoSQL, Swagger, Redis, ASP.NET MVC, Kubernetes, Ansible, GraphQL, Kafka Streams, Git, Amazon EBS, Redux, .NET, Functional Programming, REST, NUnit, MapReduce, MacOS, Shell, Continuous Integration (CI), Amazon Elastic Container Service (Amazon ECS), ASP.NET Core, DevOps, CTO, Software Architecture, C#.NET, Asynchronous Programming, AWS DevOps, CI/CD Pipelines, Back-end Development, Back-end Architecture, Azure DevOps, Azure, APIs, REST APIs, Unit Testing, Integration Testing, Back-end, Technical Hiring, Code Review, Full-stack, Source Code Review, IntelliJ IDEA, Task Analysis, Interviewing, Amazon ElastiCache, A/B Testing, In-app Messaging Systems, Live Chat, Authentication, Amazon RDS, Twilio, Twilio API, Relational Databases, Mobile App Development, Mobile Development, Databases, App Store, Google Play Store, D3.js, OAuth, JSON, CSS, HTML, CAD, 3D CAD, Revit, Windows Presentation Foundation (WPF), Jest, Mobile, Load Testing, TestFlight, Mobile Security, Technical Leadership, Firebase, Requirements Analysis, Project Planning, Product Strategy, Project Management, Software Engineering, Solution Architecture, Beanstalk, GitLab CI/CD, WireGuard, Team Leadership, IT Management, Leadership, System Architecture, MySQL, Front-end, Project Consultancy, Cybersecurity, Identity & Access Management (IAM), Cloud Security, API Development, Software Development Management, Engineering Management, Software Design, Scalability, Performance, Scraping, Web Scraping, API Integration, Cloud, Integration, Data Analytics, Data Visualization, Social Media APIs, Data Privacy, Mobile Applications, Startups, Cross-platform, Health, Event-driven Architecture, Terraform, Third-party APIs, Recommendation Systems, Node.js, React Native Bridge, Cloud Services, Cloud Architecture, Agile Project Management, DigitalOcean, Next.js, Test Automation, Animation, User Experience (UX), User Interface (UI), Google Cloud Platform (GCP), Desktop, AWS Lambda, Kotlin, Full-stack Development, App Development, Cypress, Git Flow, QA Testing, Database Modeling, Payment Gateways, Stripe Payments, Card Payments, Digital Payments, Google Cloud, Software QA, Sentry, Amazon S3 (AWS S3), AWS AppSync, Stripe API, Data Analysis, Django, Containerization, Database Design, RESTful Services, Performance Optimization, Database Optimization, Azure Kubernetes Service (AKS), Microsoft Azure, Unix, RDBMS, Data Management, JetBrains, Management, Delivery Management, DRY, Amazon Aurora, AWS Step Functions, Serverless, Message Queues, Amazon DynamoDB, AWS Certified Solution Architect, HL7 FHIR Standard, API Gateways, Google Pub/Sub

Co-founder and CTO

2021 - 2024

Wellbit

Led the cross-functional product development team of six members that brought Wellbit, a mobile app for mental health improvement, to the market.
Created the solution's architecture, including software architecture and infrastructure, to create a scalable and efficient solution that meets the business requirements.
Introduced usage of infrastructure-as-code for the project.

Technologies: Technical Leadership, Business, Financing, Agile, CTO, DevOps, Amazon Web Services (AWS), .NET, C#, C#.NET, React Native, Mobile Apps, Microservices, Kubernetes, Terraform, React, Android, iOS, Node.js, TypeScript, Artificial Intelligence (AI), SQL, Amazon S3 (AWS S3), NoSQL, RabbitMQ, Docker, GitLab CI/CD, CI/CD Pipelines, Redis, Full-stack Development, App Development, Cypress, Git Flow, QA Testing, Database Modeling, QR Codes, Software QA, React Navigation, React Router, Sentry, Video Transcoding, Data Analysis, Product Management, Minimum Viable Product (MVP), Containerization, Database Design, RESTful Services, Performance Optimization, Database Optimization, Azure Kubernetes Service (AKS), Microsoft Azure, Unix, RDBMS, Data Management, JetBrains, Management, Delivery Management, DRY, Amazon Aurora, AWS Step Functions, Serverless, Message Queues, AWS Lambda, AWS Certified Solution Architect, Microservices Architecture, API Gateways, Amazon Simple Notification Service (Amazon SNS), Google Pub/Sub

Lead Software Engineer

2022 - 2023

VPN Security (Freelance Clients)

Created a platform consisting of a network of servers that can support millions of users globally.
Collaborated with business owners to identify requirements, define project scopes, and turn them into actionable plans.
Architected the solution, developed CI/CD pipelines, provisioned infrastructure, and spearheaded the development of the whole solution.

Technologies: Back-end, Databases, WireGuard, Architecture, iOS, Android, React Native, Mobile, Agile, Terraform, Infrastructure as Code (IaC), Bitrise, CI/CD Pipelines, GitLab CI/CD, Kubernetes, Amazon Web Services (AWS), Security, Test-driven Development (TDD), Integration, Integration Testing, Mobile App Development, Redis, Redis Cache, Redis Clusters, RabbitMQ, Messaging, EventBus, C#, C#.NET, .NET, TypeScript, React Native Bridge, React, React Redux, Software Architecture, Brainstorming, Requirements Analysis, Stakeholder Management, Engineering Management, Stripe, Desktop, Mobile Apps, Swift, Kotlin, Entity Framework, Bash, VPN, Encryption, Firebase, Leadership, Team Leadership, Cross-functional Team Leadership, Cross-functional Collaboration, Agile Project Management, Cost Estimation, Estimations, Docker, GitLab, REST, GraphQL, Microservices, Diagrams, Flow Diagrams, Class Diagrams, UML Diagrams, Full-stack Development, App Development, Git Flow, QA Testing, Database Modeling, SaaS Design, Software QA, Sentry, Containerization, Database Design, RESTful Services, Performance Optimization, Database Optimization, Azure Kubernetes Service (AKS), Unix, RDBMS, JetBrains, Management, Delivery Management, DRY, AWS Step Functions, Serverless, Message Queues, AWS Lambda, Amazon DynamoDB, AWS Certified Solution Architect, Microservices Architecture

CTO

2017 - 2021

Captain Dash

Managed a distributed cross-functional team of six members.
Spearheaded the introduction of new and improved processes in the team, including knowledge sharing bi-weekly meetings, migration to cloud providers, increased automated testing, and usage of Docker containers.
Oversaw the development and successful launch of a new data analytics and visualization product used by enterprise clients.
Reduced infrastructure costs by 50% by optimizing usage, migrating to serverless database and application solutions, and removing unused resources while maintaining optimal performance.

Technologies: CTO, Technical Leadership, Stakeholder Management, Leadership, Team Leadership, Remote Team Leadership, Estimations, Cost Estimation, Business Requirements, User Requirements, Scala, Node.js, TypeScript, React Native, React, MongoDB, SQL, Redis, RabbitMQ, Microservices, Microservices Architecture, Docker, Amazon Web Services (AWS), Azure, Angular, C#, .NET, Java, Testing, DevOps, Automation, Automated Testing, Automated UI Testing, Team Management, Management, IT Management, Cross-functional Team Leadership, Full-stack Development, App Development, Git Flow, QA Testing, Database Modeling, ETL, Multitenancy, Enterprise SaaS, SaaS Design, Data Pipelines, Jenkins, Software QA, Sentry, Amazon S3 (AWS S3), Single Sign-on (SSO), Domain-driven Design (DDD), Express.js, Spring, Data Analysis, PySpark, Containerization, Database Design, RESTful Services, Performance Optimization, Database Optimization, Microsoft Azure, Unix, RDBMS, Data Management, Flask, JetBrains, Delivery Management, DRY, Amazon Aurora, Message Queues, AWS Certified Solution Architect

Expert Software Engineer

2015 - 2017

Zuhlke Engineering

Developed architecture for a consumer app used by millions of users in five countries.
Led the team developing innovative project of an online image editor for a photo printing company in .NET, TypeScript, and AngularJS.
Managed and led a distributed team that developed a greenfield project of a real-time communication and coordination system using Java EE, Android, and AngularJS.
Held training sessions and lectures on functional programming in Scala, JavaScript, software security, and DevOps.
Participated in the project acquisition phase, representing the cultural, organizational, and software engineering capabilities of the company.
Was part of the award-winning recruitment team rated as the number one recruitment process in the country for two straight years.

Technologies: Amazon Web Services (AWS), JavaScript, TypeScript, Continuous Integration (CI), Gradle, Gulp, Android, AngularJS, .NET, C#, Scala, Spring, Java, Machine Learning, Amazon EC2, Security, MongoDB, PostgreSQL, Visual Studio, Architecture, Object-oriented Design (OOD), Object-oriented Programming (OOP), Functional Reactive Programming, Amazon, Application Security, Certified Scrum Developer, WebSockets, SBT, Mobile Apps, Web App Development, OOP Designs, Web Architecture, Scrum, Agile, Distributed Team Management, Team Management, Data Structures, Test-driven Development (TDD), Heroku, Bash, SQL, Redis, Git, Concurrent Programming, Stream Processing, Functional Programming, REST, NUnit, MapReduce, MacOS, Shell, DevOps, Software Architecture, C#.NET, Asynchronous Programming, AWS DevOps, CI/CD Pipelines, Back-end Development, Back-end Architecture, APIs, REST APIs, Unit Testing, Integration Testing, Back-end, Technical Hiring, Code Review, Full-stack, Source Code Review, IntelliJ IDEA, Task Analysis, Interviewing, Amazon ElastiCache, Live Chat, Authentication, Amazon RDS, Spark, Relational Databases, Mobile App Development, Mobile Development, Databases, Google Play Store, OAuth, JSON, CSS, HTML, Mobile, Fintech, Load Testing, Technical Leadership, Requirements Analysis, Software Engineering, Spring Boot, System Architecture, MySQL, Front-end, Cybersecurity, Identity & Access Management (IAM), Cloud Security, API Development, Software Design, Scalability, Performance, API Integration, Cloud, Integration, Data Visualization, Mobile Applications, Third-party APIs, Node.js, Cloud Services, Cloud Architecture, Agile Project Management, DigitalOcean, Test Automation, Animation, User Experience (UX), User Interface (UI), Full-stack Development, QA Testing, Database Modeling, Microsoft SQL Server, Software QA, Express.js, Database Design, RESTful Services, Unix, RDBMS, Plugins, JetBrains, DRY

Senior Software Engineer

2013 - 2014

Gecko Solutions

Developed reusable UI components based on AngularJS and supported by a Java back end.
Supported the migration of a Scala back end for a mobile application based on the Play framework.
Developed a customer-facing portal for a major financial institution.
Supported onboarding and training of new development team members.
Supported recruitment efforts by interviewing candidates.
Participated in the Scrum process within distributed, international development teams.

Technologies: Git, Sass, Node.js, AngularJS, Spring, Apache Maven, SBT, Akka, Scala, Java, Amazon EC2, PostgreSQL, Object-oriented Design (OOD), Object-oriented Programming (OOP), Functional Reactive Programming, Application Security, WebSockets, Web App Development, OOP Designs, Team Management, Data Structures, Heroku, Android, Bash, SQL, Concurrent Programming, Functional Programming, REST, MapReduce, Shell, Asynchronous Programming, CI/CD Pipelines, Back-end Development, APIs, REST APIs, Back-end, Technical Hiring, Code Review, Full-stack, Source Code Review, IntelliJ IDEA, Interviewing, Authentication, Relational Databases, Databases, JSON, CSS, HTML, Fintech, Load Testing, Software Engineering, MySQL, Front-end, Cybersecurity, API Development, Software Design, Scalability, API Integration, Integration, Third-party APIs, Animation, Games, User Experience (UX), User Interface (UI), Full-stack Development, Database Modeling, PHP, RESTful Services, RDBMS, JetBrains

Software Developer

2012 - 2013

EUnet

Implemented a job-queuing system for provisioning and controlling cloud server instances.
Supported a new payment method for the company's customers.
Developed and supported various company products and software services.

Technologies: Linux, Web Hosting, JavaScript, Web App Development, OOP Designs, Data Structures, Bash, SQL, Git, Shell, Asynchronous Programming, Back-end Development, APIs, REST APIs, Back-end, Full-stack, Authentication, Relational Databases, Databases, JSON, CSS, HTML, Networks, Software Engineering, MySQL, Front-end, API Development, API Integration, Integration, Third-party APIs, Animation, Games, User Experience (UX), User Interface (UI), Full-stack Development, Card Payments, PHP, RESTful Services, RDBMS

Experience

Wellbit - AI-powered Wellbeing Coach

https://wellbit.app/

Wellbeing AI coach features a cross-platform iOS/Android mobile app built in ReactNative that, through AI-powered recommendations. It helps users develop a positive attitude, reduce stress, improve work-life balance, and live a healthier and happier life through capturing moments that matter in photo cards.

VPN Service Platform

A VPN service platform designed to facilitate clients in establishing secure connections with a vast global network of VPN servers. As the lead software engineer, I guided the engineering team through the implementation of the entire solution from scratch, including the creation of microservices coded in C#.NET, the development of cross-platform client software written in React Native, and seamless integrations with various third-party services.

CaptainDash - Enterprise Data Analytics Platform

An enterprise data analytics platform for data warehousing, data analytics, and AI-powered KPI dashboards. It produces data visualizations and reports, enabling companies to monitor their KPIs in real time and run advanced analytics algorithms to make data-driven business decisions.

Online Album Editor

An online ordering site and photo editor that enables users to create and print custom-made products, especially photo albums and greeting cards, and offers them automatic layouts based on the size and content of the provided photos.

Backbase - Engagement Banking Platform

This is enterprise portal software for customer-facing pages, with configurable and reusable components in terms of UI, security, content sources, and mobile vs. desktop presentation with WYSIWYG configuration capabilities.

Household Objects Classifier

Machine learning is applied in the field of computer vision in order to enable an Android application to recognize various objects from the household so that a model of a room with furniture may be compiled.

Optical Character Recognition Algorithm

I developed a reliable and robust OCR algorithm to recognize lines of text on a scanned piece of paper in order to count them in order to compile a list of recommendations to a client to achieve cost savings on the electricity bill.

Cell Phone Security Portal

This is an online service enabling users to access information and remotely control their cell phones in case they get lost or stolen. The service also provides various means of securing and locating the phone.

EUnet - Cloud Control Panel

https://www.eunethosting.com/control-panel-eng

This is a control panel for provisioning and managing cloud servers by the end-users and administrators of the web hosting company. The panel also provides capabilities such as monitoring, billing, and interconnecting clients' cloud services in a private VPN.

Self-driving Car Prototype

Built a self-driving car prototype based on computer vision and machine learning algorithms, based on a prototype car controlled by Raspberry Pi running OpenCV in Python. It served as a POC for further development.

Tunnel Design Revit/AutoCAD Plugin

A custom Revit/AutoCAD plugin for a client in the construction industry that is used to automatically generate tunnel designs based on input parameters that generate a Revit/AutoCad design in 3D.

It has enabled my client to speed up the process of designing tunnels by automating most of their workflows.

Skills

Languages

Bash, Python, TypeScript, SQL, Scala, C#, JavaScript, Java, Octave, C#.NET, CSS, HTML, GraphQL, C++, C, Sass, Kotlin, Swift, PHP

Frameworks

Angular, .NET, .NET Core, React Native, Redux, Spring, Rx, AngularJS, Akka, Selenium, ASP.NET, Apache Spark, Jest, Next.js, Flask, Swagger, ASP.NET MVC, Hibernate, Dagger, ASP.NET Core, NUnit, Windows Presentation Foundation (WPF), Spring Boot, Express.js, Spark, Detox, Cypress, Django

Libraries/APIs

React Redux, React, Node.js, OpenCV, REST APIs, D3.js, API Development, Twilio API, React Navigation, React Router, Spark ML, NumPy, TensorFlow, AMQP, Social Media APIs, Stripe, Entity Framework, Stripe API, PyTorch, PySpark

Tools

Git, Jenkins, Apache Maven, ScalaTest, SBT, IntelliJ IDEA, CAD, Revit, TestFlight, GitLab CI/CD, JetBrains, Amazon Simple Queue Service (SQS), RabbitMQ, Amazon EBS, Gulp, Kafka Streams, Ansible, Amazon Elastic Container Service (Amazon ECS), Shell, MATLAB, Amazon ElastiCache, VPN, Beanstalk, Terraform, Sentry, Azure Kubernetes Service (AKS), AWS Step Functions, Visual Studio, Gradle, Webpack, MSBuild, WireGuard, GitLab, AWS AppSync, Amazon Cognito, AWS SDK, AWS Glue, Amazon Simple Notification Service (Amazon SNS)

Paradigms

Functional Reactive Programming, Functional Programming, Test-driven Development (TDD), Concurrent Programming, Agile Software Development, REST, Asynchronous Programming, Object-oriented Design (OOD), Object-oriented Programming (OOP), MapReduce, Web Architecture, Scrum, Microservices, Back-end Architecture, Unit Testing, Mobile Development, Load Testing, Requirements Analysis, Agile Project Management, Cross-platform, Event-driven Architecture, Test Automation, Microservices Architecture, App Development, Database Design, KISS, DRY, Actor Programming, Continuous Integration (CI), Data Science, DevOps, B2B, Management, E2E Testing, ETL, Design Patterns, Agile, Cisco Certified Network Associate Routing & Switching, Azure DevOps, Testing, Automation, Automated Testing, HL7 FHIR Standard

Platforms

Amazon Web Services (AWS), Heroku, Android, Linux, iOS, Amazon EC2, Docker, Amazon, Mobile, Firebase, DigitalOcean, Spark Core, Kubernetes, Twilio, AWS Lambda, Apache Kafka, MacOS, Azure, AWS IoT, Google Cloud Platform (GCP), Desktop, Bitrise, Unix

Storage

PostgreSQL, MongoDB, Relational Databases, Databases, JSON, MySQL, Database Modeling, RDBMS, Amazon Aurora, Data Pipelines, Redis, NoSQL, Amazon DynamoDB, Amazon S3 (AWS S3), Redis Cache, Microsoft SQL Server, Google Cloud

Other

Web Development, Mobile Apps, SaaS, Big Data, Architecture, Application Security, WebSockets, Machine Learning, Artificial Intelligence (AI), Security, Computer Vision, CTO, Web App Development, Distributed Systems, Data Structures, Distributed Caches, Software Architecture, Back-end, Back-end Development, CI/CD Pipelines, AWS DevOps, APIs, Integration Testing, Technical Hiring, Code Review, Full-stack, Source Code Review, Task Analysis, Interviewing, In-app Messaging Systems, Live Chat, Authentication, Amazon RDS, Mobile App Development, App Store, Google Play Store, OAuth, 3D CAD, Front-end, Team Leadership, Fintech, Mobile Security, Technical Leadership, Solution Architecture, Cloud, Cloud Architecture, Cloud Services, System Architecture, Project Consultancy, Identity & Access Management (IAM), Software Development Management, Engineering Management, Software Design, Scalability, Performance, API Integration, Integration, Data Analytics, Data Visualization, Mobile Applications, Startups, Health, Third-party APIs, React Native Bridge, User Experience (UX), User Interface (UI), Full-stack Development, Git Flow, QA Testing, Enterprise SaaS, Software QA, Minimum Viable Product (MVP), Containerization, RESTful Services, Performance Optimization, Database Optimization, Data Management, Delivery Management, Message Queues, AWS Certified Solution Architect, Stream Processing, SaaS Design, OCR, Data Processing, Computer Vision Algorithms, Certified Scrum Developer, Mathematical Analysis, Team Management, A/B Testing, Networks, Project Planning, Product Strategy, IT Management, Leadership, Cloud Security, Data Privacy, Recommendation Systems, Animation, Multitenancy, Microsoft Azure, Serverless, API Gateways, Web Hosting, Electrical Engineering, Signal Processing, Digital Signal Processing, Software Engineering, OOP Designs, Distributed Team Management, Streaming, English, Networking, Cisco Networking, TCP/IP, Transmission Control Protocol (TCP), UDP, SIP, AWS Cloud Architecture, Data Engineering, Amazon Machine Learning, Scraping, Web Scraping, OpenAI GPT-4 API, Games, Stakeholder Management, Remote Team Leadership, Estimations, Cost Estimation, Business Requirements, User Requirements, Automated UI Testing, Cross-functional Team Leadership, Business, Financing, Enterprise, Infrastructure as Code (IaC), Redis Clusters, Messaging, EventBus, Brainstorming, Encryption, Cross-functional Collaboration, Diagrams, Flow Diagrams, Class Diagrams, UML Diagrams, QR Codes, Payment Gateways, Stripe Payments, Card Payments, Digital Payments, Single Sign-on (SSO), Domain-driven Design (DDD), Video Transcoding, Data Analysis, Product Management, Plugins, Google Pub/Sub

Industry Expertise

Project Management, Cybersecurity

Education

2010 - 2013

Master's Degree in Electrical Engineering and Computer Science

University of Belgrade | School of Electrical Engineering - Belgrade, Serbia

2006 - 2010

Bachelor's Degree in Electrical Engineering and Computer Science

University of Belgrade | School of Electrical Engineering - Belgrade, Serbia

Certifications

MAY 2023 - MAY 2026

AWS Certified Solutions Architect – Professional

Amazon Web Services

NOVEMBER 2022 - MAY 2026

AWS Solutions Architect Associate

Amazon Web Services

MAY 2016 - PRESENT

SDI (Strength Deployment Inventory)

Singidunum University (Belgrade, Serbia)

MAY 2016 - PRESENT

Oracle Certified Associate, Java SE 8 Programmer

Oracle

SEPTEMBER 2015 - PRESENT

Professional Scrum Developer

Scrum.org

DECEMBER 2013 - PRESENT

Functional Programming Principles in Scala

École Polytechnique Fédérale de Lausanne via Coursera

JULY 2012 - PRESENT

Cisco Networking Academy

University of Belgrade Faculty of Electrical Engineering (Belgrade, Serbia)

JUNE 2011 - PRESENT

Certificate of Proficiency in English – CPE

University of Cambridge (Cambridge, UK)

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