SPI Experts in Germany
for reliable embedded systems, matched in minutes with vetted and available freelancersHire experts who connect sensors, displays and memory through SPI, configure microcontrollers and debug board-level communication. Get precise matches with vetted, available freelancers who can join remotely or on site in Germany.
Meet FRATCH Experts in Germany, who have recently used SPI
Matthias S.
Last position:
Software Developer and Consultant at CLADE GmbH
- Analysis of the existing CAN communication between microcontrollers
- Analysis of the sensors used and the measured values collected
- Planning the CAN messages for transmitting the measured values
- Iterative adjustment of the microcontroller code to the new CAN messages
- Cross-compilation from x64 to arm64
Waqar A.
Last position:
Principal Engineer at Microchip Technology
- Acted as an FPGA Subject Matter Expert with hands-on experience in Microchip Technology Libero SoC and PolarFire FPGA/SoC evaluation platforms.
- Identified a bug in an application note and provided a solution.
- Collaborated with Field Application Engineers (FAEs) to analyze, debug, and resolve customer-reported FPGA issues.
- Worked with internal teams to accelerate SPI flash programming by creating an FPGA design that enabled high-speed communication between JTAG and SPI.
- Characterized PolarFire FPGA temperature TVS sensors from -40°C to 100°C, comparing estimated and measured surface temperatures and analyzing junction-to-surface temperature estimation using the Psi-JT thermal parameter.
S.r.k. C.
Last position:
Senior Software Engineer at STEPPS GmbH / Motherson Dr. Schneider
Project: Intelligent Light Communication Software — Audi
- Analysis and clarification of system requirements with the customer and translation into software architecture and design decisions
- Architecture and implementation of CAN FD and SPI communication on NXP S32K312
- Design and development of flash bootloader, flash driver, and boot manager for secure OTA-capable updates
- Configuration of the AUTOSAR BSW architecture (Dcm, Dem, NvM, BswM, Os, Mcu, Port, Com stack, Rtc) for portability and maintainability
- Design of the crypto stack (Csm, CryIf, Crypto) for secure flash and diagnostic data; integration of the NXP HSE core and wrapper layer
- Integration of customer-specific modules (Sfd, Ivd, Npm) into the Vector AUTOSAR stack
- Definition of the memory architecture: Memmap, CMake, and linker script configuration
- Leading board bring-up for the Audi light demo platform; implementation of diagnostic routines and identifiers
Jonathan M.
Last position:
On-Site Coordinator at Freelance
- Customer interface and relationship management
- Requirements management and work coordination
- Technical and functional support focusing on automotive Ethernet
Muhammad J.
Last position:
Embedded Linux Intern – IoT Sensor Prototype Development at DHL
- Built a modular C++ 20 embedded Linux acquisition system on a Raspberry Pi, synchronizing IMU and dual-camera data streams to sub-millisecond accuracy.
- Integrated retro-reflective and contrast sensors to trigger acquisition and detect gaps between sorter rails.
- Implemented SPI & I2C sensor communication, GPIO interrupt handling with libgpiod, and CSV & JSON output.
- Designed a multi-threaded acquisition pipeline and an SPSC queue between acquisition and writer threads.
- Built a Python/HTML/CSS based web-server and validated the prototype in a DHL warehouse for defect detection.
- Documented software behavior, configuration, and results for maintainable handover and further development.
Abdelrahman H.
Last position:
Research Assistant (WHK), FPGA Development – BrassSense Project at HAW Hamburg / Prof. Peter Schulz
- Real-time tone detection on FPGA (~20 ms latency target) using a filter bank architecture with a fuzzy-logic decision stage, avoiding FFT due to its window-length/frequency-resolution tradeoff.
- Responsible for system integration and architecture.
Kacper K.
Last position:
Author
Seqnaut and Sycosm (WIP) – Embedded Audio DSP & Synthesis Platform
- Embedded audio DSP framework — synthesizers, effects, drum machines; modular audio graph
- Sequencing: PianoRoll, StepGrid, MasterClock; 8-voice polyphonic synth; CLI + OSC
- Transient Detector — dual-envelope adaptive threshold, guitar attack detection
- Hardware: Teensy 4.1, custom AFE design tapping BOSS GX-100; MIDI FX integration
Label: C++23, C, Python, CMake, FreeRTOS, Teensy 4.1 (ARM Cortex-M7), Teensy Audio (Stoffregen), DaisySP, I2S/SAI, OSC, MIDI
Oliver O.
Last position:
Embedded Software Architect at Automotive supplier
Stellar SR6 G7 line, 32-bit Arm® Cortex®-R52+ MCU.
- MISRA-C, C99, Greenhills ARM compiler
- Dassault AUTOSAR Builder
- EB Tresos
- Sparx Enterprise Architect 16.1
- VS Code
- Python xml, lxml, NumPy and Pandas
ISO 26262, ISO 21434, hypervisor, key management, HSM. Tooling & automation. LieberLieber LemonTree + Sparx EA. Jira, Confluence, SharePoint. Git/Github. DevOps through Jenkins & Conan.
Kai W.
Last position:
biobedded systems GmbH
- Embedded software development for EMS safety boards in medical technology according to IEC 62304 / ISO 13485
- Technologies: C++, OpenCV, Python, Qt6, JTAG, UART, CMake, IEC 62304, ISO 13485
Peter J.
Last position:
Interim Teamlead at Somnomedics
- Interim Teamlead to setup a project with STM32 and NORA Bluetooth module.
- Customer is planning new hardware to replace existing hardware with Bluetooth communication instead cable connection.
- Project was already started but the requirements were not defined.
- System based on STM32 and Nora B106 CPU.
- Analyzing the existing available code base.
- Checking for possible solutions to get the project working.
- Defining the requirements.
- Applying some rules to improve the team communication.
- Working with the NRF tools to get the custom board based on NORA B106 (NRF5340) working.
- Implementation of a simple device communication by Bluetooth.
- Preparation of documentation.
- Leading communication meetings.
- Conducted discussions with customer.
- Tools used: JIRA, OneNote, Git, Confluence, Nordic NRF, Nora B106.
Valentin R.
Last position:
Freelance Hardware Development Engineer at Swarm Biotactics
PCB design with Altium, MCU Programming, Prototyping
Hendrik W.
Last position:
Software Test and Maintenance Support at Anton Paar ProveTec GmbH
- Add/create test specifications
- Conduct regression tests
- Conduct release tests
- Analyze Jira tickets
- Identify software defects and fix them with C#
Roland R.
Last position:
Support in Ongoing Project at Automotive Supplier
- closing the safety case
- creation of meaningful traceability matrices and targeted test expansion
- transferring requirements into other database systems
- structuring the requirements, assessing their completeness, and setting up new test cases based on use-case–based test strategies and the results of internal traceability matrices
- partial automation of tasks within a requirement assessment tool
- tools and languages: MS Teams, reqIF, Enterprise Architect, Codebeamer, proprietary tools for creating and evaluating traceability matrices (approx. 1000 x 1000)
Michael R.
Last position:
Project Manager at Infrawave
Project planning, construction schedule control, and resource coordination
Management of subcontractors, site managers, and suppliers
Application and tracking of traffic regulation orders (VRAO) and excavation permits
Quality assurance, health and safety (HSE), and compliance with technical standards
Budget control, contract management, and VOB-compliant change order management
Complete construction documentation, including as-built records and billing documents
Implementation of 3D GIS-supported construction progress processes
Development of a finance dashboard in collaboration with IT
Acceleration of permit approvals through optimized coordination with municipalities
Optimization of material and resource logistics
Introduction of structured site and progress reports
Arne H.
Last position:
Embedded Fullstack Developer at IoT / Infrastructure Automation Sector
- Analysis of legacy codebase and identification of architectural issues, implementing improvements in coordination with the Product Owner.
- Development of clean, efficient, and fully documented code following established software engineering practices and standards.
- Analysis of Erlang components in backend and device layers to provide recommendations for ensuring stable system operation.
- Setup and optimization of CI/CD pipelines on client infrastructure, including testing, debugging, and certificate management quality assurance.
- Participation in planning, design, and implementation of epics and stories according to Product Owner specifications.
- Technical consultation for Product Owner regarding Erlang codebase management and best practices.
- Collaboration with Product Owner, Scrum Master, and development team to ensure timely delivery of features.
- Elixir & Phoenix + PostgreSQL
- Erlang
- IoT
- CI/CD
- Git
- Agile/Scrum
- Docker
- Kubernetes
- Frontend (VueJS)
- Embedded Devices
Discover over 15,000 top freelancers
Statistics of experts using SPI
Aggregated from the professional profiles of matched freelancers.
Experience
18 years
Position duration
3 years
Positions per freelancer
12
Top business areas
Product Development, Information Technology, Quality Assurance
Top industries
Manufacturing, Information Technology, Automotive
Certification focus areas
Information Technology, Product Development, Quality Assurance
Bachelor's degree or higher
94%
Master's degree or higher
71%
Doctorate
10%
Certifications per freelancer
2
Most common languages
English, German, Spanish
Speak two or more languages
100%
Based on our profile pool as of 19 Sep 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Germany are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows how many freelancers charge within that range.
Average rates of experts in Germany using SPI
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 19 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
SPI experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Manufacturing (73%)
- Information Technology (71%)
- Automotive (59%)
- Healthcare (36%)
- Education (32%)
- Telecommunication (29%)
- Aerospace and Defense (27%)
- Energy (22%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What SPI does
SPI, or Serial Peripheral Interface, is a synchronous serial bus for short-distance communication between a controller and peripheral devices. It uses separate clock, data-in, data-out and chip-select signals, making it fast and predictable for embedded hardware. The controller selects each device and controls the transfer timing.
Where it is used
SPI appears wherever a microcontroller needs direct, efficient access to a peripheral:
- Reading sensors, converters and measurement modules
- Driving displays, touch controllers and LED hardware
- Connecting flash memory, EEPROM and real-time clocks
- Communicating with radio, motor-control and security components
- Bringing up custom boards and production electronics
Ecosystem and tooling
SPI work spans microcontrollers, embedded Linux boards, programmable logic and custom silicon. Specialists use vendor HALs, device trees, board support packages and RTOS drivers, alongside oscilloscopes and logic analyzers. Common concerns include clock polarity, clock phase, bit order, transfer length, chip-select handling and signal integrity.
When expertise matters
Companies bring in freelance SPI expertise when a peripheral works inconsistently, a new board needs bring-up or an existing driver must move between hardware variants. Strong support can shorten debugging cycles and prevent faults that only appear under load, temperature changes or faster clock settings. In Germany, specialists may collaborate remotely with firmware and hardware teams or join on-site validation sessions.
Deliverables to expect
A capable professional can turn a device datasheet into tested, maintainable integration work:
- SPI driver or reusable hardware-abstraction code
- Device-tree, pin-mux and chip-select configuration
- Register-level initialization and data-transfer routines
- Logic-analyzer traces, test fixtures and fault analysis
- Documentation for timing limits, wiring and production tests
What distinguishes strong specialists
The best SPI specialists understand both software transactions and the electrical behavior behind them. They verify timing with instruments, inspect waveforms instead of guessing and account for DMA, interrupts, buffering and concurrency. They also compare datasheet requirements with real board behavior, isolate faults methodically and leave clear tests and documentation for the permanent team.
Frequently asked questions
Need clarity? These are the questions we hear most often about SPI.
SPI, short for Serial Peripheral Interface, connects a controller to peripherals such as sensors, displays, flash memory, converters and radio modules. It is useful when a project needs direct, synchronous transfers with low protocol overhead.
Serial Peripheral Interface usually provides higher throughput and simpler transfer timing than I2C, but it needs more signal lines and a separate chip-select signal for each device in many designs. Unlike UART, SPI is clocked and normally supports a controller with one or more selected peripherals rather than an asynchronous point-to-point link.
A strong SPI specialist often works across C or C++, microcontroller peripherals, RTOS or embedded Linux drivers and board bring-up. Experience with GPIO, DMA, interrupts, device trees, datasheets and logic analyzers is equally important when diagnosing real hardware.
SPI integration can be straightforward for a well-documented sensor, but complex when timing, DMA, multiple chip selects or custom hardware are involved. Choose a professional who has handled the relevant controller, operating environment and peripheral class, and ask for evidence of tested hardware integration rather than relying on protocol familiarity alone.
SPI software, configuration and log analysis can often be completed remotely when the specialist has access to schematics, firmware, documentation and test data. On-site work in Germany is more useful for board bring-up, probing signals, resolving wiring issues and validating production hardware.
A reliable SPI implementation should match the peripheral datasheet, configure clock polarity and phase correctly, handle chip-select timing and recover from communication errors. Review waveform evidence, automated tests, documented assumptions and behavior across the required clock speeds and operating conditions.
Experienced SPI specialists commonly investigate incorrect clock phase, reversed data order, floating or miswired chip-select lines, unsuitable voltage levels and signal integrity problems. They also check driver initialization, DMA buffers, interrupt timing and conflicts when several peripherals share the bus.
SPI is a strong choice for short board-level links that need speed and predictable timing, but it is not ideal for long cables or designs with many peripherals and limited pins. I2C may reduce wiring, UART may suit a simple serial link, and CAN or another bus may be better for robust multi-node communication.
The average hourly rate of freelancers in Germany who have used SPI in their recent projects is 86 €, which corresponds to a daily rate of about 685 € based on an 8-hour working day.
Of the freelancers in Germany who have used SPI in their recent projects, 94% hold at least a Bachelor's degree, 71% hold at least a Master's degree, and 10% hold a doctorate.
On average, freelancers in Germany who have used SPI in their recent projects have 18 years of professional experience, with a single engagement typically lasting around 3 years.
The most common languages among freelancers in Germany who have used SPI in their recent projects are English (98%), German (97%), and Spanish (15%).
The most common industries among freelancers in Germany who have used SPI in their recent projects are Manufacturing (73%), Information Technology (71%), and Automotive (59%).
The most common business areas among freelancers in Germany who have used SPI in their recent projects are Product Development (97%), Information Technology (92%), and Quality Assurance (90%).
Main locations of FRATCH Experts, who have recently used SPI
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
Berlin 
Munich Request a free demo
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Philipp Thomaschewski
FRATCH CEO
