A dedicated and determined individual with strong skills in writing clean, upto standard and efficient code. Learned in data structures, compilers and functional programming. Programming Languages: Proficient in C, Haskell, Scheme, Java, Rust and shell scripting. Familiar with Python, Standard ML, Coq, x86 and RISC-V assembly. Open Source: I am an open source citizen, and contribute patches when I can. Projects include: - PostgREST/postgrest (Member: 200+ commits) - torvalds/linux - ghc/ghc - haskell/cabal - racket/typed-racket - HOL-Theorem-Prover/HOL Github: taimoorzaeem Interests include: Discrete Mathematics, Compilers, Functional Programming, Theorem Proving, Unix/Linux Philosophy, Type Theory

I have 20+ years working with electronics and programming. My experience includes working on military avionics, radio frequency devices, and programming micro-controllers. I am comfortable with video calls and presentations. That way we can better communicate about the project and your expectations. I have created hundreds of small PCBs from concept to prototype. Here are some of the tools and skill sets that I use: MPLAB X MPLAB XC8 PIC Assembler Micro-Cap 12 for circuit simulation, graphs, and component selection Altium 24 SigmaStudio for DSP processors SMT soldering Testing Fabrication assistance

High-performance backends. Decision engines. AI factories. Computer vision. Real-time systems. From UI/UX-heavy MVPs to full-stack platforms built for the traffic that comes after launch day, not just during it. Rust, C++, and 5+ languages. 100,000+ concurrent WebSocket connections -- in production. A 12-week roadmap shipped in 4. 30 senior engineers. Dedicated project teams, not rotating freelancers. Every engagement starts with a paid Discovery phase -- we scope the architecture before we write a line of code. Not a fit: no-code workflows, or projects solvable with Zapier. WHAT I BUILD - High-Performance Backends: Production backends with actix-web, axum, and Tokio -- millions of requests/day, zero GC pauses. REST, GraphQL, WebSocket, and gRPC services for throughput and latency-sensitive workloads. - Full-Stack Platforms: React, Next.js, TypeScript frontends with production backends -- SaaS, MVPs, and custom web applications from architecture to deployment. Designed for 1K to 100K concurrent users without a rewrite. - Autonomous AI Agents: Agentic pipelines with OpenAI and Anthropic Claude -- lead qualification, data analysis, customer support running 24/7. Multi-step reasoning, error recovery, state persistence. 11+ projects for one client. - Computer Vision: Object detection, tracking, real-time inference, OCR, document processing -- CUDA-optimized, deployed as production APIs or edge devices. Not Jupyter notebooks. - Real-Time 3D & Visualization: WebGL and WebGPU rendering -- product configurators, data dashboards, architectural viewers at 60fps in-browser on mid-range hardware. - Data Pipelines: Rust-native processing with Polars and DataFusion -- replacing Python/JavaScript bottlenecks. Kafka streaming, PostgreSQL persistence. - Cloud & Infrastructure: AWS, GCP, Azure with Terraform and Kubernetes -- auto-scaling, zero-downtime deployments, infrastructure-as-code. RECENT OUTCOMES - Crypto trading platform dropping connections above 8,000 users. Rebuilt proxy in Rust, Tokio, Kubernetes -- 100,000 connections at under 10ms, zero crashes. - GovTech blockchain payment router on Go. Rebuilt IAVL Tree in Rust -- 20–30% faster, Clutch-reviewed (Alex Kampa, AZKR Research). - Recruitment team spending 4 hours daily on manual data entry. Built automated extraction and processing pipeline -- 95% reduction. - Data analytics platform hitting memory limits in JavaScript. Replaced core with Rust and Polars -- 5x faster processing, 70% lower memory. - Blockchain gaming 3D pipeline loading in 8+ seconds. Rebuilt within 4GB RAM budget -- 45% faster, Clutch-reviewed (Ruslan Varets). TECHNOLOGIES - Systems & Backend: Rust, C++, Python, TypeScript, actix-web, axum, Tokio, Node.js, WebAssembly - Frontend: React, Next.js, TypeScript, Tauri, Dioxus - AI & Agents: OpenAI, Anthropic Claude, Hugging Face, LangChain, RelevanceAI - Graphics: WebGL, WebGPU, OpenGL, Vulkan, three.js, GLSL/WGSL shaders, bevy - Vision: OpenCV, CUDA, PyTorch, TensorFlow, Keras, Mediapipe - Data: Polars, DataFusion, PostgreSQL, Kafka, Snowflake, Apache Arrow - Cloud & DevOps: AWS, GCP, Azure, Terraform, Kubernetes, Docker, GitHub Actions - Networking: WebRTC, LibP2P, QUIC, WebSocket, gRPC Delivery: Discovery → Architecture Review → Platform Build → Performance Testing → Production Deploy → Runbook Handoff. Fixed scope per phase. This profile is for engineering teams building production platforms under real load. Send your project brief -- I'll reply within 48 hours to assess fit.

My job is to design functional and tested circuits and PCBs for your application or consult you, so you can do that your self. Just give me requirements for your circuit: the price for bill of materials, deadline and a list of required features. After a prototype of the device is designed, which I almost always advise, I will order few sample PCBs for testing. After testing and debugging is completed, I will ship them to you, so you can verify my testing results. This costs extra for you, but you are buying 100% working circuit design which needs no testing. Just take it and use it in your project. If you want to know how a circuit works I can develop complete math model of the circuit. This approach is way more accurate than SPICE simulation and allows you to understand how the circuit operates. I have completed at least one project having fallowing sub circuits: Analog: Low noise, low speed front-ends (from Hz to 100KHz): Photodiode, strain gauge, pressure sensitive resistors, magnetic angle sensors, tensile, thermocouples and other. High order active filters Voltage measurement (uV to kV) Current measurement (pA to tens of A) Resistance measurements (mOhm to Mohm) Frequency measurement (below GHz) Current output Oscillators (Bubba, Pierce, Hartley, phase shift, relaxation, crystal, RC) Integrated RF transmitters/receivers Digital: PCIe USB HDMI I2S SPI High speed parallel interfaces Logic circuits (TTL, CMOS) SOCs Power: DC/DC converters: Buck, Boost, SEPIC, full bridge, Cuk, Linear AC/DC converters (up to 1.8kW) Brushless and brushed motor drivers TEC drivers CAD packages: DipTrace KiCad Altium I have fallowing equipment: 1x Osciloscope RTB2004 4 channel 10 bit 300MHz with logic analyzer having 16 differential channels up to 600Mbps. 1x Oscilloscope HMO1002 2 channel 8 bit 50MHz. 1x Multimeter HMC8012 5,75digit 1x Electronic load IT8616 1.8kVA 420VAC 20AC (60A peak) or 600VDC 20ADC with AC signal analysis 1x Electronic load IT8512C 120VDC 60ADC 1x Signal generator Rohde and Schwarz AFG 20MHz 1x TP3020 30V 20A linear power supply 1x HY5003-2 dual channel 50V 3A linear power supply 2x PeakTech 6080A 15V 3A power supply 1x VP-2000VA - 2kVA 230VAC to 120VAC converter. 1x DER-EE DE-5000 RLC meter I also have programmer for: Texas Instruments CC series, Texas Instruments MSP430 programmer, Microchip ICD3/PicKit2/AVR ISP USBasp, Segger ARM programmer, SiliconLabs 8051 core programmer

I am a FPGA systems developer with over 12 years experience in all aspects of FPGA-based and embedded digital system design. Independent and self-driven, I consult for a wide variety of applications/industries. Founder at bard0 design. I cover all major FPGA vendors AMD/Xilinx, Altera, Lattice, Microchip, Efinix, GoWin. My skills include: -FPGA development consulting (Xilinx, Altera, Lattice,Microchip,Efinix,GoWin) -RTL architecture design and development (VHDL, Verilog, SystemVerilog) -Imaging applications (CMOS&CCD Sensors,MIPI-CSI,SDI,HDMI,HiSPi,CameraLink,CoaXPress,USB3Vision,GigE Vision) -8k/4k/HD video processing -Ethernet/Networking applications (10/100/1000 and 10Gbps) -High-Speed I/O interfaces (LVDS, SLVS, Gigabit Transceivers, PCIe Gen4+) -Memory interfaces and management (SRAM, DDR3/DDR4) -Embedded processor integration (RISC-V,ARM, Microblaze/NIOS) -Embedded Firmware development (Assembler, C) -Schematics, I/O Planning, PCB design

Sid is passionate about bringing electrical project ideas and concepts all the way to completion as design files ready for mass production. From making sure the initial idea is viable, to choosing the parts, designing the electrical schematic, and routing the PCB...to writing, debugging and testing the firmware required for the requisite functionality. PROGRAMMING • 18 years of experience with programming in C/C++, BASIC, and Assembler (machine code). • Extensive experience writing firmware utilizing hardware interrupts, MCU peripherals, RTOS, and multithreading. • Equally at home writing firmware for 8-bit processors (Microchip PIC, 8051, etc.) as with 32-bit processors (including ARM-based processors, the ESP32 product series, and more). • Writes tight and efficient code that is both fast and very lightweight: reduces processor requirements and cost. • Experience in writing secure firmware update infrastructure (for any processor with bootloader provision and self-write capability, including the ESP32). • Use of captive-portal HTML5 web UIs for easy headless product field setup and configuration, bypassing the need for iOS & Android app development and costs. ELECTRICAL • 16 years of experience designing schematics & PCBs in EDA software. (Currently using KiCAD, a powerful cross-platform EDA suite. As it's free, that means that you can easily view project design files at any time without any costly subscription requirements.) • Enjoys finding creative and unusual solutions to design challenges (both electrical and software), to meet budgetary requirements and/or space constraints. • Experience with both monochrome and color LCD UIs, with user interaction via physical buttons, switches, encoders, touch pads, TFT LCD touchscreens, IR remotes and more.

Secure your infrastructure and deconstruct malicious binaries with a certified expert. As a Certified Cybersecurity (ISC2) professional and specialized Reverse Engineer, I don't just find vulnerabilities—I understand the code behind them. My background in full-stack development gives me a unique advantage: I know exactly how applications are built, which makes me significantly faster at breaking them down, analyzing malware, and patching security holes. I specialize in Reverse Engineering and Digital Forensics, helping clients understand proprietary file formats, analyze suspicious executables, and recover data from compromised systems. Whether you have a suspicious file that needs dissecting or a network that needs hardening, I provide actionable, evidence-based results. Click "Invite to Job" and let’s discuss your security needs.

I am a highly detail-oriented Embedded Systems Engineer with extensive experience across multiple embedded industries, including IoT devices, robotics, safety systems, and smart electrical meters. I specialize in designing reliable, low-power embedded solutions with strong emphasis on modular architecture, portability, and security. I have strong expertise in wireless IoT firmware, custom bootloaders, OTA/FUOTA systems, compression algorithms, and RTOS-based architectures. I have developed production-grade firmware from scratch, including bootloaders capable of updating both application and bootloader images, delta OTA update systems, and ultra-low-power connected devices. Recently, I have been working with Silicon Labs platforms, Amazon Sidewalk protocol, and Zephyr RTOS-based systems. --------------------------------------------------------------------------------------------------------------- 🔹 Core Expertise • Embedded Firmware Architecture • Bootloader Development • Delta OTA / FUOTA Systems • Ultra-Low Power IoT Devices • Wireless Connectivity (BLE / LoRa / Sidewalk) • RTOS Design & Porting • Compression Algorithms for Firmware Updates --------------------------------------------------------------------------------------------------------------- 💎 Programming Languages • C / C++ • Python • Assembly --------------------------------------------------------------------------------------------------------------- 💎 Microcontrollers • ARM Cortex-M0 / M3 / M4 / M33 (single & dual core) • Nordic Semiconductor • Texas Instruments • Analog Devices • STMicroelectronics • Silicon Labs (EFR32 / Amazon Sidewalk) • Espressif • Maxim Integrated --------------------------------------------------------------------------------------------------------------- 💎 Operating Systems • FreeRTOS • TI-RTOS • POSIX • Zephyr RTOS (in progress) • Custom scheduler development • RTOS porting to ARM Cortex-M architectures --------------------------------------------------------------------------------------------------------------- 💎 Wireless Communication • Wi-Fi • Bluetooth / BLE • LoRa / LoRaWAN • Sub-GHz RF • Amazon Sidewalk • Proprietary RF stacks --------------------------------------------------------------------------------------------------------------- 💎 Wired Communication • UART / USART • SPI • I2C • SDI-12 --------------------------------------------------------------------------------------------------------------- 💎 Protocols & Standards • LoRaWAN • BLE • DLMS / COSEM • Amazon Sidewalk --------------------------------------------------------------------------------------------------------------- 💎 OTA & Bootloader Expertise • Custom bootloader development from scratch • Application & bootloader self-update support • Delta OTA update algorithms • Secure firmware update architecture • FUOTA implementation --------------------------------------------------------------------------------------------------------------- 💎 Compression & Firmware Optimization • LZ77 compression • Deflate algorithm • Huffman coding • Custom compression/decompression design • Delta firmware generation algorithms • Memory-constrained decompression --------------------------------------------------------------------------------------------------------------- 💎 IoT Cloud Connectivity (Device Side) • AWS IoT Core (device onboarding, uplink/downlink) • The Things Network (TTN) • Senet • MultiTech • FUOTA integration --------------------------------------------------------------------------------------------------------------- 💎 Build Systems & Toolchains • GCC • Make • CMake --------------------------------------------------------------------------------------------------------------- 💎 Debugging & Testing Tools • Oscilloscope • Spectrum Analyzer • Logic Analyzer • Multimeter • Joulescope (power profiling) --------------------------------------------------------------------------------------------------------------- 💎 Version Control • Git • SVN --------------------------------------------------------------------------------------------------------------- 💎 Additional Skills • Low-power optimization • Power profiling and tuning • Embedded firmware architecture design • PID control systems • DSP (Digital Signal Processing) • Bash scripting • Embedded Linux • PCB design understanding

I build production-grade web applications and backend systems that scale — and I have the metrics to back it up. Over 5 years I've shipped full-stack systems across SaaS, logistics, and AI platforms. At PortPro, a drayage SaaS serving thousands of drivers across the US, I cut Mapbox API costs from $12K to $1.5K/month by architecting an intelligent caching layer, reduced database storage by 88% (700GB → 80GB) via a TimescaleDB migration, and led a team of 5 engineers to maintain 99.9% production uptime. Currently at Arrow Transport in Sydney, I'm building an enterprise logistics platform on .NET Core, React, and AWS ECS handling Australia-wide operations. On Upwork, I've delivered 15+ projects with a 100% Job Success Score and Top Rated Plus status — including a GPU-accelerated AI video generation SaaS (Produce.so), an AI companionship app backend (Frankie AI), and a Paddle-integrated property management platform (Host & Guest). What I build: — Full-stack web applications: React, Next.js, TypeScript, Node.js, NestJS — Backend systems and REST/GraphQL APIs: PostgreSQL, MongoDB, Redis — Cloud infrastructure: AWS (ECS, Lambda, S3, CloudWatch), Docker, Kubernetes — AI integrations: OpenAI API, Claude API, LangGraph, RAG pipelines — Async processing: BullMQ, FFmpeg video pipelines, webhook systems — Auth and payments: JWT, OAuth2, Stripe, Paddle, Apple Pay, Google Pay I'm based in Sydney, Australia (AEST) and available 30–40 hours per week. If you need someone who writes clean, documented code and communicates clearly throughout — let's talk.

I’m a Solution Architect with 6+ years of experience building reliable, scalable software systems. My main focus is on Rust backend development, but I also design cloud solutions, automate infrastructure, and help teams turn business needs into working products. What I do: - Design and build backend systems with Rust (using Rocket, Axum, Actix-web) and databases like PostgreSQL and Redis - Create APIs, microservices, and event-driven systems that are fast, secure, and easy to maintain - Lead cloud projects and automate deployments with AWS, GCP, Terraform, and CI/CD pipelines - Work closely with clients and teams to make sure solutions fit their needs and are delivered on time Key skills: Rust, WebAssembly, GraphQL, cloud architecture, automation, microservices, SQL, Supabase, distributed systems, Prometheus, Grafana, CI/CD, Terraform, AWS, GCP. I’m committed to clear communication and practical results. Let’s talk about how I can help you build the right solution for your project.