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Eckart Schütz

Verified Expert in Engineering

Software Developer

Larnaca, Cyprus

Toptal member since March 26, 2018

Expertise

Linux Back-end Developers Multithreading Network Programming Systems Engineering VoIP API Embedded Software Engineering Fintech Development Remote Development UDP Smart Contract Development Trading Software Debugging HPC Software Architecture

Bio

Eckart has 25 years of experience developing back-end software with C++ in the telecommunications and financial services industries. His expertise ranges from embedded systems to big data platforms and from libraries to software architecture.

Portfolio

Freelance

Technical Design, Technical Documentation, Web Architecture, Architecture...

Interactive Data Managed Solution; acquired by FactSet

Technical Design, Web Architecture, Architecture, Fintech...

Swyx Solutions AG; acquired by Enreach

Technical Design, Technical Documentation, Architecture, Coaching, Databases...

Experience

Distributed Systems - 20 years
Scrum - 12 years
Software Architecture - 11 years
High-performance Computing (HPC) - 7 years
ITIL - 7 years
Big Data - 7 years
Embedded Linux - 7 years
C++17 - 4 years

Work Experience

Software Architect/Engineer

2018 - PRESENT

Freelance

Led the migration of an enterprise VoIP PBX from C on a proprietary platform to C++/C on embedded Linux: designed the event-driven core library and the multi-tier startup logic, wrote Yocto recipes, and drove refactoring for performance.
Built X.509 certificate–based license handling for the same platform; ran code reviews and coached the client’s software engineering team lead.
Architected and built the execution client for an AI-based trading system, connecting to the trading venue and placing model-driven orders in real time.
Built and tested a BEP-20 token, presale contract, and PancakeSwap fee-swap logic for BNB Smart Chain; the contract passed an external security audit.
Built protocol-stack components for inter-module communication in a modular, microcontroller-based industrial control system.
Served as the sole back-end developer for the configuration and visualization app of an industrial 3D laser sensor, with a Chromium Embedded Framework and Angular/WebGL front end; engineered streaming of around 1 GB per second of sensor data into the web UI.

Technologies: Technical Design, Technical Documentation, Web Architecture, Architecture, Fintech, Coaching, Technical Leadership, Continuous Integration (CI), Finance, Kernel, Databases, Embedded Development, HTML5, Web, OpenSSL, Object-oriented Programming (OOP), Asynchronous Development, X.509 Certificates, IPv6, IPv4, Design Patterns, Session Initiation Protocol (SIP), WebRTC, API Design, Documentation, CI/CD Pipelines, APIs, POSIX, Real-time Systems, Real-time Data, Back-end, PostgreSQL, PKI, Software Design, TCP/IP, Transmission Control Protocol (TCP), State Machines, Financial Market Data, Telephony, Remote Work, Low-latency Software, Low Latency, Parallel Programming, Embedded Systems, HTML, Valgrind, Asynchronous Programming, Embedded C++, Python, Embedded Software, Sockets, Linux IPC, GitLab, Trading, Sparx Enterprise Architecture, Encryption, Financial Products, Event-driven Programming, Standard Template Library (STL), Socket Communication, Network Programming, Data Structures, Multithreading, UML, Angular, JavaScript 6, SQL, REST APIs, CMake, Linux, Distributed Programming, Socket Programming, Concurrent Programming, Agile Software Development, C++, Algorithms, Software Architecture, YouTrack, Git, Distributed Systems, Public-key Cryptography, Scrum, UML 2, Object-oriented Design (OOD), Embedded Linux, C, Yocto, Python 3, C++17, Networking, Design Principles, Debugging, HTTP, X.509, HTTPS, Microcontroller Programming, Applied Cryptography, CSS, Automated Testing, Smart Contracts, Non-blocking I/O, Code Review, Source Code Review, Blockchain, Artificial Intelligence (AI), Web Development, Mentorship & Coaching, Infrastructure, Server Infrastructure, Ubuntu Linux, Industrial Automation, Open Office, LibreOffice, Ubuntu, Shell Scripting, Data Analysis, Agile, Google Test, Remix IDE, Solidity, MetaMask, GitLab CI/CD, Solution Architecture, Solution Design, Digital Certificates, Capital Markets, Technical Writing, BNB Smart Chain, Back-end Performance, Stock Exchange, Linux Kernel, Crypto, Cryptocoin Mining, Data-level Security, Systems Engineering, System Administration, Software Engineering, Quantitative Analysis, Back-end Development, Software Design Patterns

Senior Software Engineer

2010 - 2017

Interactive Data Managed Solution; acquired by FactSet

Worked on the platform architecture team for a distributed financial-data platform spanning 3,000+ servers at web-search-scale request rates, handling around 300,000 price updates per second on a normal trading day.
Designed and built a C++ streaming library for price-data distribution—Kafka-like in role, at lower CPU and network-bandwidth cost.
Built the push-subscription feature of the proprietary DBMS, sustaining 25,000,000 subscriptions and 30,000 messages per second per production node.
Built low-memory-footprint data structures, including an optimized vector class, plus the metadata distribution and filtering for price-data streams.
Built a reduced-logic equivalent of a Hadoop NameNode, plus HTML back ends for live data inspection.

Technologies: Technical Design, Web Architecture, Architecture, Fintech, Template Metaprogramming, MySQL, Finance, Microservices Architecture, Databases, C++14, Scrum, HTML5, Web, Object-oriented Programming (OOP), Asynchronous Development, IPv4, Confluence, Data Pipelines, API Design, CI/CD Pipelines, APIs, POSIX, Real-time Systems, Real-time Data, Back-end, Back-end Performance, Jira, Software Design, Transmission Control Protocol (TCP), Parallel Programming, Asynchronous Programming, Embedded C++, Data Engineering, Python, Sockets, Linux IPC, High-performance Computing (HPC), Subversion (SVN), Low Memory Constraint Development, Financial Products, Event-driven Programming, Standard Template Library (STL), UDP, Network Programming, Data Structures, Multithreading, Oracle SQL, NoSQL, Git, SQL, Stock Exchange, Financial Market Data, ITIL, Optimization, Big Data, Distributed Systems, Distributed Programming, Socket Programming, Concurrent Programming, Agile Software Development, Algorithms, Express.js, Node.js, JSON, XML, HTML, Oracle, Socket Communication, Linux, TCP/IP, C++, Networking, Profiling, Design Principles, Debugging, HTTP, HTTPS, Non-blocking I/O, Web Development, Infrastructure, Server Infrastructure, Ubuntu Linux, Ubuntu, Shell Scripting, Agile, Cloud, Solution Design, Technical Writing, Data-level Security, Web Security, Scalability, Financial Data, Systems Engineering, System Administration, Software Engineering, Back-end Development, Back-end Architecture, Software Design Patterns

Senior Software Engineer

2005 - 2009

Swyx Solutions AG; acquired by Enreach

Initiated and led the redesign of the SwyxWare VoIP server core, decoupling components and making it object-oriented — accelerating subsequent development roughly six-fold.
Delivered a server-resilience (failover) feature and SNMP support.
Introduced Lamport timestamps for user-state dissemination across the distributed system, and coached engineers.
Built a Qt tool for interactive log-file analysis with semantic filtering.

Technologies: Technical Design, Technical Documentation, Architecture, Coaching, Databases, Microsoft Visual Studio, Scrum, Object-oriented Programming (OOP), Asynchronous Development, IPv4, Qt Creator, Design Patterns, Session Initiation Protocol (SIP), API Design, Documentation, APIs, POSIX, Real-time Systems, Real-time Data, Back-end, Software Design, TCP/IP, Transmission Control Protocol (TCP), Computer Telephony, State Machines, Telephony, Parallel Programming, SQL Server 2010, Sockets, Asynchronous Programming, Embedded C++, UML, Sparx Enterprise Architecture, Encryption, Event-driven Programming, Standard Template Library (STL), Network Programming, Data Structures, Multithreading, Visual Studio, SQL Server 2000, Microsoft Project, Windows API, SQL, Qt 5, Distributed Systems, Distributed Programming, Socket Programming, Concurrent Programming, Agile Software Development, Microsoft Visual C++, Software Architecture, Qt, SMTP, SNMP, Socket Communication, Microsoft SQL Server, VoIP, C++, Networking, Design Principles, Debugging, UI Programming, Graphical User Interface (GUI), Non-blocking I/O, Desktop App Development, Mentorship & Coaching, Agile, Solution Architecture, Solution Design, Technical Writing, Back-end Performance, Systems Engineering, System Administration, Software Engineering, Back-end Development, Back-end Architecture, Software Design Patterns

Senior Software Engineer

2001 - 2005

Avaya-Tenovis GmbH & Co. KG

Shaped the software architecture of the I55 PBX VoIP-conversion project and specified the protocol between call-control and connector modules.
Built the call-control and ISDN side of a VoIP-ISDN gateway on embedded Linux, plus the interface to the PBX’s internal communication bus.
Built a UDP-based logging library for the embedded system, with remote log-level control and kernel-module logging.

Technologies: Technical Design, Technical Documentation, Architecture, Embedded Development, Object-oriented Programming (OOP), Asynchronous Development, SHA, IPv4, Design Patterns, IBM Rational ClearCase, IBM Rational ClearQuest, API Design, Documentation, APIs, POSIX, Real-time Systems, Real-time Data, Back-end, Software Design, TCP/IP, Transmission Control Protocol (TCP), State Machines, Telephony, Model-driven Engineering (MDE), Low Latency, Low Memory Constraint Development, Parallel Programming, Embedded Systems, Asynchronous Programming, Embedded C++, Embedded Software, Sockets, Linux IPC, CORBA, Encryption, IBM Rational Rose, Event-driven Programming, Standard Template Library (STL), Network Programming, Data Structures, Multithreading, Cross-platform, Distributed Systems, Distributed Programming, Socket Programming, Concurrent Programming, Agile Software Development, Software Architecture, UML, Socket Communication, Embedded Linux, Linux, VoIP, C++, Networking, Design Principles, Debugging, Non-blocking I/O, Infrastructure, Server Infrastructure, Wireless Protocols, Solution Architecture, Solution Design, Technical Writing, Back-end Performance, Operating Systems, Systems Engineering, System Administration, Software Engineering, Back-end Development, Back-end Architecture, Software Design Patterns

Senior Software Engineer

2000 - 2001

Tedas AG

Built the call-control and ISDN side of a VoIP-ISDN gateway for an embedded VoIP PBX.
Built an adaptive-filter echo canceller and a thin OS abstraction layer for Linux and Windows NT.
Developed a highly optimized logging library with only minimal impact on the timings of the software, even on embedded systems.

Technologies: Technical Design, Architecture, Embedded Development, Object-oriented Programming (OOP), Asynchronous Development, SHA, IPv4, API Design, Documentation, APIs, POSIX, Real-time Systems, Real-time Data, Back-end, Software Design, TCP/IP, Transmission Control Protocol (TCP), State Machines, Telephony, Parallel Programming, Sockets, Asynchronous Programming, Embedded C++, Digital Signal Processing, Public-key Cryptography, Embedded Software, Linux IPC, Signal Processing, Encryption, Event-driven Programming, Network Programming, Data Structures, Multithreading, Cross-platform, Distributed Systems, Distributed Programming, Socket Programming, Concurrent Programming, Agile Software Development, H.323, Socket Communication, Embedded Linux, Linux, Windows, VoIP, C++, Networking, Design Principles, Debugging, Non-blocking I/O, Agile, Solution Design, Back-end Performance, Operating Systems, Systems Engineering, System Administration, Software Engineering, Back-end Development, Software Design Patterns

Senior Software Engineer

1995 - 2000

Digi International AG | ITK Telekommunikation AG

Built core parts of the NetBlazer 8500 carrier-grade 120-channel VoIP-ISDN gateway, including the call-control state machine (Mealy machine, 60+ states, 50+ events); integrated third-party DSP software, audio codecs, and echo cancellation.
One of six developers behind the CeBIT 1998 demo that let visitors place live phone calls over the internet.
Built a Microsoft TSP and an object-oriented interface for ITK ISDN cards, a DTMF-tone detector, and a Windows NT kernel-mode intermediate driver.

Technologies: Technical Design, Architecture, Windows Kernel Drivers, Visual SourceSafe, Win32, Kernel, Web, Object-oriented Programming (OOP), Asynchronous Development, H323, IPv4, API Design, Documentation, APIs, POSIX, Real-time Systems, Real-time Data, Back-end, Software Design, TCP/IP, Transmission Control Protocol (TCP), State Machines, Telephony, Low-level Programming, Parallel Programming, Sockets, Asynchronous Programming, PKI, Embedded C++, SRTP, Public-key Cryptography, Linux IPC, AES, Encryption, Event-driven Programming, UDP, Socket Communication, Network Programming, Microsoft Visio, Windows API, Distributed Systems, Distributed Programming, Concurrent Programming, Agile Software Development, Algorithms, Software Architecture, Microsoft Foundation Classes (MFC), Microsoft Foundation Class (MFC) Library, Win32 API, TI DSP C2000, RTP, H.323, Integrated Services Digital Network (ISDN), Unix, Linux, Windows, VoIP, C++, Networking, Design Principles, Debugging, HTTP, HTTPS, Applied Cryptography, Cryptographic Protocols, Non-blocking I/O, Agile, Solution Architecture, Solution Design, Technical Writing, Back-end Performance, Operating Systems, Systems Engineering, System Administration, Software Engineering, Back-end Development, Back-end Architecture, Software Design Patterns

Project History

Configuration of and Data Visualization for an Industrial 3D Laser Sensor

An app for the configuration of and data visualization for an industrial 3D laser sensor. The app uses the Chromium Embedded Framework, which is internally split into the front and back ends. The front end is based on Angular/WebGL/WebAssembly, and the back end is on C++. I was the main developer, except for the WebAssembly part. The biggest challenge was pushing up to 1GB of sensor data into a web-based front end.

Protocol Stack of Embedded System in Industrial Automation

A control unit comprising a stack of modules, each module having its own microcontroller and connected to a proprietary bus. I developed a part of the protocol stack for inter-module communication.

Financial Data Platform

I contributed to building a distributed, scalable, and reliable financial data platform containing data of millions of securities, including real-time prices and historical prices. It handles request rates comparable to those of Google's search engine. I was a member of the platform architecture team, developed the communication library to distribute price data streams among the back-end components, built several features of the core DBMS, like price subscriptions, and optimized run-time performance. On normal trading days, the DB handled 300,000 price updates per second.

Smart Contract | Crypto Token

A BEP-20 token for the Binance Smart Chain. The contract swaps transaction fees to BNB using PancakeSwap. The token's contract successfully passed an external security audit: Github.com/TechRate/Smart-Contract-Audits/blob/main/August/Pomsky.pdf. I implemented and tested the token's contract and the contract for presales and assisted the front-end developer in integrating web3.js.

Enterprise VoIP Telephony System

I contributed to the transformation of a VoIP PBX written in C from a proprietary platform to embedded Linux using C++/C. I also developed an object-oriented library for the event-driven architecture, developed the startup logic of the multi-tier PBX software, built features like the license handling (based on X.509 certificates), wrote Yocto recipes, reviewed code, coached, refactored (especially regarding multi-threading, IPC, and performance), tested, debugged, and wrote documentation.

VoIP Server

I worked on a feature-rich VoIP enterprise telephony solution based on Windows. I developed several features, like the resilience feature, SNMP, SMTP, and did a redesign of the server's core software.

Enterprise PBX

For a scalable, modular, distributed enterprise telephony system consisting of 50 to 10,000+ phones, we changed the proprietary platform to a Linux/Intel platform. I defined interfaces, contributed to the system architecture, and developed several components.

VoIP PBX

I contributed to the development of a software VoIP enterprise telephony solution. I built the ISDN side of a VoIP gateway on embedded Linux, the remote logging infrastructure, an echo canceler based on an adaptive filter, and a thin OS abstraction layer.

NetBlazer 8500

NetBlazer 8500 is a carrier-grade 120 channel remote access server and VoIP-ISDN gateway with DSPs for audio compression and echo canceling. The only product at CeBIT 1998 that allowed users to make live phone calls over the internet. I developed the ISDN side of the gateway and parts of the call control, tested the third-party DSP software, and designed the architecture.

Web App

I built a web app using Angular 5, Node.js, Express.js, PostgreSQL, and a REST API.

Trading Client

A machine learning ML-based trading system. I developed a trading client that connects to the trading platform and uses artificial intelligence (AI) for making trading decisions.

Drop Catching

I have developed a system to register (catch) domains that have just been released (dropped) by the registry. I modified the low latency software to adjust for the new regulations of the registry.

Education

2015 - 2016

Master's Degree in Executive Master of Business Administration, General Management

IE Business School - Madrid, Spain

1989 - 1994

Master's Degree in Computer Science (Robotics, Signal Processing, AI, Design of Integrated Circuits, Databases) GPA 3.7

Technical University Brunswick - Brunswick, Germany

Certifications

JULY 2019 - PRESENT

Professional Scrum Master I

Scrum.org

MARCH 2017 - APRIL 2022

PRINCE2 Practitioner

APMG International

Skills

Libraries/APIs

Sockets, POSIX, REST APIs, Standard Template Library (STL), OpenSSL, Node.js, AES, WebRTC, Microsoft Foundation Class (MFC) Library, Windows API, Win32 API, Web3.js, Microsoft Foundation Classes (MFC), WebGL

Tools

Git, IBM Rational Rose, Valgrind, CMake, Subversion (SVN), IBM Rational ClearCase, GCC, Microsoft PowerPoint, LibreOffice, Jira, Confluence, GNU Debugger (GDB), Qt Creator, Google Hangouts, Google Sheets, Google Docs, Google Slides, Open Office, Microsoft Visio, Visual Studio, GitLab, YouTrack, Microsoft Project, IBM Rational ClearQuest, Visual SourceSafe, TFS, Microsoft Visual Studio, Microsoft Visual C++, MetaMask, Remix IDE, Eclipse IDE, GitLab CI/CD, Gprof

Languages

C++, C++17, Embedded C++, Embedded C, C++14, C++11, C, Solidity, UML, Python 3, Python, SQL, JavaScript 6, UML 2, TypeScript, HTML5, Assembler x86, XML, HTML, JavaScript, CSS3, CSS, x64 Assembly

Paradigms

Asynchronous Programming, Parallel Programming, Real-time Systems, Web Architecture, Concurrent Programming, Scrum, Socket Programming, High-performance Computing (HPC), Model-driven Engineering (MDE), Event-driven Architecture, Asynchronous Development, PRINCE2, Object-oriented Design (OOD), Object-oriented Programming (OOP), Distributed Programming, Event-driven Programming, Agile Software Development, Automated Testing, Unit Testing, Agile, Microservices Architecture, ITIL, Template Metaprogramming, Continuous Integration (CI), Cross-platform, Design Patterns, Desktop App Development, Management, Kanban, Back-end Architecture, Quantitative Research, Web Application Architecture

Platforms

Blockchain, Software Design Patterns, Linux, Embedded Linux, Unix, Windows, Ubuntu, Web, Amazon Web Services (AWS), Docker, Kernel, Win32, Oracle, Ubuntu Linux, Ethereum

Industry Expertise

Project Management, Marketing, Trading Systems

Frameworks

Qt, Express.js, Qt 5, Angular, Google Test, Chromium Embedded Framework (CEF)

Storage

MySQL, PostgreSQL, NoSQL, JSON, Microsoft SQL Server, SQL Server 2010, Data Pipelines, Databases, SQL Server 2000, Oracle SQL

Other

Optimization, Scrum Master, Linux IPC, Financial Market Data, Embedded Software, API Design, APIs, Embedded Development, Coaching, Executive Coaching, Fintech, Architecture, Technical Documentation, Technical Design, Back-end, Software Design, Back-end Performance, Distributed Systems, TCP/IP, UDP, Multithreading, Low Latency, Software Architecture, Transmission Control Protocol (TCP), VoIP, Data Structures, Cryptocurrency, Low Memory Constraint Development, Low-latency Software, Leadership, Remote Work, Low-level Programming, Socket Communication, State Machines, Telephony, Computer Telephony, Network Programming, Networking, Design Principles, Applied Cryptography, Smart Contracts, Non-blocking I/O, Infrastructure, Server Infrastructure, Solution Architecture, Solution Design, Digital Certificates, Scalability, Systems Engineering, Software Engineering, Real-time Communication (RTC), Integrated Services Digital Network (ISDN), Embedded Systems, Public-key Cryptography, Image Processing, Data Engineering, Real-time Data, Documentation, X.509 Certificates, Finance, Microsoft 365, Financial Products, Trading, Orderbook Engine, Stock Exchange, Cryptography, IPv6, Algorithms, Encryption, Signal Processing, Sparx Enterprise Architecture, SHA, IPv4, Windows Kernel Drivers, Interdisciplinary Collaboration, Big Data, Technical Leadership, Digital Signal Processing, RTP, SRTP, H323, SMTP, Profiling, Debugging, HTTP, HTTPS, X.509, UI Programming, Microcontroller Programming, Graphical User Interface (GUI), Mentorship & Coaching, Data Analysis, Operating Systems, Blockchain & Cryptocurrency, Decentralized Applications, ERC-20, Cryptocurrency Payments, Technical Writing, Ethereum Smart Contracts, Algorithmic Trading, Data Science, BNB Smart Chain, Crypto, Data-level Security, ERC-721, Data Analytics, Financial Data, Quantitative Analysis, Back-end Development, WebSockets, Angular 13, H.323, TI DSP C2000, Yocto, ISO 26262, Robotics, Integrated Circuits, Computer Vision, CI/CD Pipelines, Artificial Intelligence (AI), Entrepreneurship, Negotiation, Strategy, CORBA, Cryptocurrency Wallets, PKI, SIP, Session Initiation Protocol (SIP), SNMP, Cryptographic Protocols, Industrial Automation, Firmware, Code Review, Source Code Review, Web Development, Shell Scripting, Wireless Protocols, Cloud, Linux Kernel, Non-fungible Tokens (NFT), Decentralized Finance (DeFi), Data Cleaning, Data Transformation, Capital Markets, FX, AWS Cloud Architecture, Machine Learning, Cryptocoin Mining, Web Security, Server Security, IT Security, Linux Administration, Full-stack, Web Applications, Mathematics, System Administration, IPC, JSONRPC, WebAssembly (Wasm)

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Work Experience

Software Architect/Engineer

2018 - PRESENT

Freelance

Led the migration of an enterprise VoIP PBX from C on a proprietary platform to C++/C on embedded Linux: designed the event-driven core library and the multi-tier startup logic, wrote Yocto recipes, and drove refactoring for performance.
Built X.509 certificate–based license handling for the same platform; ran code reviews and coached the client’s software engineering team lead.
Architected and built the execution client for an AI-based trading system, connecting to the trading venue and placing model-driven orders in real time.
Built and tested a BEP-20 token, presale contract, and PancakeSwap fee-swap logic for BNB Smart Chain; the contract passed an external security audit.
Built protocol-stack components for inter-module communication in a modular, microcontroller-based industrial control system.
Served as the sole back-end developer for the configuration and visualization app of an industrial 3D laser sensor, with a Chromium Embedded Framework and Angular/WebGL front end; engineered streaming of around 1 GB per second of sensor data into the web UI.

Senior Software Engineer

2010 - 2017

Interactive Data Managed Solution; acquired by FactSet

Worked on the platform architecture team for a distributed financial-data platform spanning 3,000+ servers at web-search-scale request rates, handling around 300,000 price updates per second on a normal trading day.
Designed and built a C++ streaming library for price-data distribution—Kafka-like in role, at lower CPU and network-bandwidth cost.
Built the push-subscription feature of the proprietary DBMS, sustaining 25,000,000 subscriptions and 30,000 messages per second per production node.
Built low-memory-footprint data structures, including an optimized vector class, plus the metadata distribution and filtering for price-data streams.
Built a reduced-logic equivalent of a Hadoop NameNode, plus HTML back ends for live data inspection.

Senior Software Engineer

2005 - 2009

Swyx Solutions AG; acquired by Enreach

Initiated and led the redesign of the SwyxWare VoIP server core, decoupling components and making it object-oriented — accelerating subsequent development roughly six-fold.
Delivered a server-resilience (failover) feature and SNMP support.
Introduced Lamport timestamps for user-state dissemination across the distributed system, and coached engineers.
Built a Qt tool for interactive log-file analysis with semantic filtering.

Senior Software Engineer

2001 - 2005

Avaya-Tenovis GmbH & Co. KG

Shaped the software architecture of the I55 PBX VoIP-conversion project and specified the protocol between call-control and connector modules.
Built the call-control and ISDN side of a VoIP-ISDN gateway on embedded Linux, plus the interface to the PBX’s internal communication bus.
Built a UDP-based logging library for the embedded system, with remote log-level control and kernel-module logging.

Senior Software Engineer

2000 - 2001

Tedas AG

Built the call-control and ISDN side of a VoIP-ISDN gateway for an embedded VoIP PBX.
Built an adaptive-filter echo canceller and a thin OS abstraction layer for Linux and Windows NT.
Developed a highly optimized logging library with only minimal impact on the timings of the software, even on embedded systems.

Senior Software Engineer

1995 - 2000

Digi International AG | ITK Telekommunikation AG

Built core parts of the NetBlazer 8500 carrier-grade 120-channel VoIP-ISDN gateway, including the call-control state machine (Mealy machine, 60+ states, 50+ events); integrated third-party DSP software, audio codecs, and echo cancellation.
One of six developers behind the CeBIT 1998 demo that let visitors place live phone calls over the internet.
Built a Microsoft TSP and an object-oriented interface for ITK ISDN cards, a DTMF-tone detector, and a Windows NT kernel-mode intermediate driver.

Project History

Configuration of and Data Visualization for an Industrial 3D Laser Sensor

Protocol Stack of Embedded System in Industrial Automation

A control unit comprising a stack of modules, each module having its own microcontroller and connected to a proprietary bus. I developed a part of the protocol stack for inter-module communication.

Financial Data Platform

Smart Contract | Crypto Token

Enterprise VoIP Telephony System

VoIP Server

Enterprise PBX

VoIP PBX

NetBlazer 8500

Web App

I built a web app using Angular 5, Node.js, Express.js, PostgreSQL, and a REST API.

Trading Client

A machine learning ML-based trading system. I developed a trading client that connects to the trading platform and uses artificial intelligence (AI) for making trading decisions.

Drop Catching

I have developed a system to register (catch) domains that have just been released (dropped) by the registry. I modified the low latency software to adjust for the new regulations of the registry.

Education

2015 - 2016

Master's Degree in Executive Master of Business Administration, General Management

IE Business School - Madrid, Spain

1989 - 1994

Master's Degree in Computer Science (Robotics, Signal Processing, AI, Design of Integrated Circuits, Databases) GPA 3.7

Technical University Brunswick - Brunswick, Germany

Certifications

JULY 2019 - PRESENT

Professional Scrum Master I

Scrum.org

MARCH 2017 - APRIL 2022

PRINCE2 Practitioner

APMG International

Skills

Libraries/APIs

Tools

Languages

C++, C++17, Embedded C++, Embedded C, C++14, C++11, C, Solidity, UML, Python 3, Python, SQL, JavaScript 6, UML 2, TypeScript, HTML5, Assembler x86, XML, HTML, JavaScript, CSS3, CSS, x64 Assembly

Paradigms

Platforms

Blockchain, Software Design Patterns, Linux, Embedded Linux, Unix, Windows, Ubuntu, Web, Amazon Web Services (AWS), Docker, Kernel, Win32, Oracle, Ubuntu Linux, Ethereum

Industry Expertise

Project Management, Marketing, Trading Systems

Frameworks

Qt, Express.js, Qt 5, Angular, Google Test, Chromium Embedded Framework (CEF)

Storage

MySQL, PostgreSQL, NoSQL, JSON, Microsoft SQL Server, SQL Server 2010, Data Pipelines, Databases, SQL Server 2000, Oracle SQL