Hire the Best RSpec Specialists

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Rating is 4.8 out of 5.
4.8/5
Based on 107 client reviews
Christian G.

Glendale, California

$70/hr
4.9
61 jobs

I help U.S. businesses navigate SMS approval, deliverability, and compliance requirements - reducing the risk of carrier rejections, blocked traffic, and regulatory issues. I specialize in A2P SMS compliance and deliverability, including 10DLC registration, Toll-Free Verification (TFN), and TCPA/CTIA consent audits, as well as diagnosing carrier-level delivery problems. My work focuses on aligning SMS programs with current carrier and regulatory expectations so they can operate and scale responsibly in the U.S. market. If your messages are being rejected, filtered, or delayed - or you’re unsure whether your consent flow and use case will withstand carrier or legal review—I can help assess and correct the underlying issues. What I Do • 10DLC brand & campaign registration (new submissions, rejections, reclassifications) • Toll-Free Verification (TFN) setup and resubmissions • TCPA / CTIA compliance audits (opt-in flows, disclosures, opt-out handling) • SMS deliverability diagnostics (carrier filtering, content flags, throughput limits) • Platform-specific guidance (Infobip, Twilio, GoHighLevel, ClickSend, SimpleTexting) • Compliance-aware SMS automation (webhooks, triggers, rate-limiting, quiet hours)

  • SMS
  • Lead Generation
  • Mobile Marketing
  • Compliance Consultation
  • Regulatory Compliance
  • Mobile Marketing Automation
  • Twilio
Diyorbek J.

Tashkent, Uzbekistan

$20/hr
5.0
8 jobs

I am a Power System Engineer specializing in grid studies, relay protection, and dynamic simulation for transmission, distribution, solar, wind, BESS, and industrial power systems. I help utilities, EPCs, developers, and consultants prepare accurate system models, protection settings, simulation results, and submission-ready technical reports using DIgSILENT PowerFactory, ETAP, PSCAD/EMTDC, and PSS®E. Core services: • Load flow and voltage profile studies • Short-circuit studies according to IEC 60909 / ANSI • N-1 / N-2 contingency analysis • Reactive Power Capability Study • Grid Code Compliance Study • Electrical equipment selection based on power system study results • Protection coordination and relay settings • Arc flash hazard analysis according to IEEE 1584 • Grid Impact Assessment and interconnection studies • Renewable integration studies for solar PV, wind, and BESS • Harmonic and resonance studies • EMT studies: transformer energization, switching transients, lightning, LVRT/HVRT • MOD / PRC / Grid Code compliance Software: • DIgSILENT PowerFactory • ETAP • PSCAD / EMTDC • PSS®E Typical deliverables: • Technical report in PDF / Word format • Simulation model files when required • Short-circuit and load-flow result tables • Protection settings and TCC curves • Arc flash incident energy tables and label data • Compliance summary and recommendations • Excel calculation sheets Relevant experience includes: • PRC-023 / PRC-025 relay setting compliance reviews • MOD-025 / MOD-026 / MOD-027 support for renewable and generation projects • Arc flash studies for MV and LV systems • PSCAD EMT and DIgSILENT RMS/EMT studies for solar, wind, and BESS projects • Harmonic, resonance, switching transient, and insulation coordination studies My focus is to provide clear engineering results, practical recommendations, and reports that can be reviewed by utilities, owners, EPCs, lenders, and technical consultants.

  • Electrical Engineering
  • DIgSILENT
  • ETAP
  • Modeling
  • Report Writing
  • PSCAD
  • Power Systems Engineering
  • Power Distribution
  • Energy Modeling Software
  • Power System
  • Harmonica
Juliia S.

Chernivtsi, Ukraine

$35/hr
5.0
2 jobs

Ruby on Rails and Vue.js full-stack developer with 8+ years of experience building SaaS platforms, marketplaces, CRM systems, and healthcare applications from scratch. I’ve shipped production systems handling 1M+ monthly transactions, built a pharma analytics platform used by enterprise B2B clients for over 6 years, and delivered Vue.js and Node.js applications for clients across the US, EU, and UK. 🧠 Backend: Ruby on Rails, Ruby, REST APIs, GraphQL, PostgreSQL, MySQL, Redis, Sidekiq, Apache Kafka, JWT, OAuth2, RSpec (90%+ test coverage), Capybara, Swagger 🎨 Frontend: Vue.js, Vue 3, Nuxt.js, Vuex, Pinia, Vue Router, JavaScript, TypeScript, Tailwind CSS, Hotwire, Stimulus, WebSockets, Stripe integrations ⚙️ Infrastructure: Docker, GitHub Actions, AWS S3, Azure, Heroku, Nginx, Capistrano, CI/CD pipelines What this looks like in practice: → Built and maintained REST and GraphQL APIs consumed by Vue.js SPAs with clean architecture, versioning, and full documentation → Optimized complex PostgreSQL queries, improving performance in systems with 1M+ monthly transactions → Migrated CI/CD pipelines from CircleCI to GitHub Actions, reducing costs while maintaining production stability → Implemented Kafka-based event streaming and optimized data flows in microservice-based systems → Integrated Stripe payments and real-time WebSocket features in Vue.js and Node.js / NestJS applications → Refactored and extended legacy Ruby on Rails systems without breaking existing functionality → Maintained 90%+ test coverage using RSpec and Capybara in production-grade systems How I work: I communicate clearly from day one, define scope before development starts, identify risks early, and keep progress transparent throughout the project. I’ve worked both independently on full-stack products and in distributed teams with async workflows. Looking for a Ruby on Rails or Vue.js developer who delivers reliable production systems, not just code commits? Let’s talk.

  • RSpec
  • Ruby on Rails
  • Vue.js
  • Nuxt.js
  • PostgreSQL
  • REST API
  • GraphQL
  • JavaScript
  • TypeScript
  • Tailwind CSS
  • Node.js
  • PostgreSQL Programming
  • NestJS
  • Redis
  • Stripe
  • Websockets
  • Docker
Manuchehri Raxmonov E.

Tashkent, Uzbekistan

$30/hr
5.0
22 jobs

I am a Senior Power Systems Engineer specializing in **grid interconnection, compliance, and system impact studies** for **renewable generation, BESS, hybrid plants, conventional generation, and large industrial / data center loads**. I deliver **utility-, ISO-, and TSO-ready studies** using **PSS®E, PowerFactory, PSCAD, and ETAP**, covering the full range of technical assessments required for project development, connection applications, design review, and compliance demonstration. My work supports **Solar PV, Wind, BESS, Hybrid plants, conventional power facilities, and data centers**, with studies prepared in a way that reflects how utilities and system operators actually review **models, assumptions, plots, test evidence, and compliance conclusions**. I support clients from early-stage screening through submission-ready packages, including clear RFIs, defensible assumptions, clean technical plots, and structured reports suitable for utilities, TSOs, ISOs, developers, EPCs, and owners’ engineers. Core Services Grid Interconnection & Compliance Studies * Load flow and operating case assessment * Short-circuit / fault level calculations * RMS dynamic stability studies * Grid code and interconnection compliance benchmarking * Utility / ISO submission-ready technical reports * Model review, validation, and technical support during review cycles ### Renewable Generation / BESS / Hybrid Plants * Solar PV, Wind, BESS, and Hybrid plant interconnection studies * LVRT / HVRT / LFRT / HFRT assessment * Reactive power capability and voltage control performance * Frequency response and plant controller performance * Weak-grid assessment and control interaction review * PRC / MOD / MQT / G99 / G5 compliance support ### Data Center & Large Load Studies * Grid connection studies for **large industrial loads and data centers** * Load flow, contingency, and thermal capacity assessment * Point of interconnection screening and transfer capability review * Motor starting / dynamic load behavior review where applicable * Voltage stability and reactive power performance assessment * Large load ride-through and dynamic behavior assessment * Support for connection strategy, substation concept review, and utility-facing technical documentation ### Design & Engineering Support * Single-line diagrams (SLD) * Cable and conductor sizing * Grounding / earthing grid studies * Surge arrester selection and insulation coordination * Protection coordination and selectivity studies * Relay setting review and interface logic support ## Technical Services ### Short-Circuit Studies * Fault calculations to IEC 60909 and IEEE methods * Breaker duty and X/R ratio verification * IBR fault contribution assessment * Faulted operating condition evaluation ### Dynamic (RMS) Studies * Transient stability and oscillatory damping * Frequency response and control performance * LVRT / HVRT / LFRT / HFRT benchmarking * Weak-grid and controller interaction studies * Plant controller and model tuning support ### EMT Studies * IBR control interaction and converter dynamics * Fast transient and weak-grid EMT validation * Special operating scenarios and black-start studies where required * OEM / utility EMT model review and benchmarking ### Protection & Control Interface * Relay coordination support * PRC-019 interface checks * Voltage / frequency protection coordination with IBR controls * SCADA / Modbus / IEC 61850 signal and interface logic review ## Grid Codes & Standards Experience **United States** NERC PRC(029 024 019) & MOD(025 026 027 032) standards, ERCOT, PJM, NYISO, MISO, SPP, CAISO IEEE 519, IEEE 1453, IEEE 1547 ERCOT model quality and interconnection processes **United Kingdom** ENA G99 ENA G5/5 P28 / P29 DNO submission and acceptance support **Germany / EU** VDE-AR-N 4110 / 4120 FGW TR3 / TR4 / TR8 references Additional regions can be supported based on project documentation and applicable grid-code requirements. ## Software * PSS®E * DIgSILENT PowerFactory * PSCAD * ETAP * MATLAB / Simulink * AutoCAD ## Deliverables * Technical reports * RAW / DYR files * PowerFactory projects * PSCAD cases * ETAP models * Parameter summaries * Validation plots * Submission support documents ## Why Clients Work With Me * Clear scope definition from the start * Strong RFIs and efficient data collection * Technically defensible assumptions * Utility-ready reports and plots * Combined RMS and EMT capability I can support complete interconnection packages or single-study scopes, depending on project needs. If you have an RFP, grid-code requirement, interconnection document, utility feedback package, or study scope, I can review it and help define a clear technical approach, deliverables list, and schedule.

  • Energy
  • PSCAD
  • DIgSILENT
  • ETAP
  • AutoCAD HVAC Loads Calculations
  • Power Distribution
  • Power Systems Engineering
  • Compliance Consultation
Oriel B.

Naic, Philippines

$40/hr
5.0
6 jobs

I am a Licensed Electrical Engineer with hands-on experience in mission-critical data center environments, currently working with Equinix Philippines as a Senior IBX Customer Operations Engineer. I specialize in electrical power systems, data center infrastructure, and technical engineering support. My background includes working with high-availability systems such as UPS, generators, switchgear, ATS/MTS, and structured cabling within Tier III data center environments. I bring real-world operational experience into every project—not just theoretical design—ensuring that all outputs are practical, reliable, and aligned with industry standards. Here are the services I offer: • Professional Consultation • Electrical load calculations and panel schedules • Single-line diagram (SLD) creation and review • Data center and server room power planning (kW/kVA, rack capacity) • UPS, generator, and ATS system support and consultation • Electrical technical reports and documentation • AutoCAD electrical layouts and as-built diagrams I am familiar with industry standards such as TIA-942 and data center best practices, and I focus on delivering accurate, well-documented, and professional outputs. If you are looking for a reliable Electrical Engineer who understands real-world systems and mission-critical environments, I would be glad to support your project.

  • Electrical Engineering
  • Electrical Design
  • Power System
  • Load Calculation
  • Autodesk AutoCAD
  • Data Center Operations
  • Data Center
  • Data Center Design
  • Energy Management
  • Engineering Tutoring
  • ETAP
Hammad Q.

Islamabad, Pakistan

$11/hr
5.0
16 jobs

RMM focused Cloud & Systems Engineer with 10+ years of experience in mission-critical and enterprise environments. I hold an MS in Information Security and specialize in Managed IT Services, MSP environments, Cloud Infrastructure, Cybersecurity, and Network Engineering. I help businesses design, secure, automate, and manage their IT infrastructure with a strong focus on uptime, compliance, performance optimization, and proactive monitoring. #Managed Services & RMM Expertise Extensive hands-on experience with: • Datto RMM, Datto EDR, Datto Backup • Pulseway • NinjaOne • ManageEngine • Ivanti #Delivering: ✔ Remote Monitoring & Management (RMM) ✔ Patch Management & Automated Updates ✔ Endpoint Detection & Response (EDR) ✔ Antivirus Deployment (Bitdefender GravityZone) ✔ Vulnerability Management ✔ Compliance Enforcement ✔ Asset Discovery & Inventory Management ✔ Backup Monitoring & Disaster Recovery #Cloud & DevOps Engineering Strong expertise in: • Azure VMs, VMSS, AKS • Azure Networking & Storage • Azure Site Recovery • Azure Arc • Hybrid Cloud Architecture • Azure Security Center / Defender for Cloud #Amazon Web Services (AWS) • EC2, RDS, S3, Lambda • IAM & RBAC • VPC & Security Groups • CloudWatch Monitoring • Encryption & Backup Strategies ✔ Cloud Migration (On-Prem to Cloud) ✔ Cost Optimization ✔ Infrastructure as Code ✔ Automation using PowerShell, Bash & Python #Microsoft 365 & Security Specialist Advanced expertise in: • Exchange Online • SharePoint Online • Microsoft Teams • Microsoft Intune (Endpoint Manager) • Autopilot Provisioning • MDM / MAM • Conditional Access & Zero Trust • Microsoft Purview (DLP, eDiscovery, Retention Policies) • Defender for Endpoint • Defender for Office 365 • Defender for Identity • Microsoft Sentinel (SIEM/SOAR) ✔ User Lifecycle Management ✔ Hybrid Identity (Azure AD Connect) ✔ RBAC & Security Hardening ✔ Compliance & Governance #Active Directory & Identity Management • AD Architecture Design • FSMO Role Management • Group Policy Design & Optimization • Replication Troubleshooting • Security Hardening • ADFS, SSO/SAML • Microsoft Entra ID • Okta & LDAP Integration #Network & Firewall Engineering Cisco Certified (CCNA Cyber Ops, CCNP ENARSI) Hands-on experience with: • Cisco Routers & Switches • Cisco Meraki • Cisco ASA • Palo Alto • FortiGate • Juniper vSRX • pfSense • Sangfor ✔ VLAN, QoS, NAT, IPSec VPN ✔ Site-to-Site VPN (IPsec) ✔ Remote Access VPN Deployment ✔ SSL VPN Configuration ✔ Firewall Policy Management ✔ Network Security Hardening ✔ High Availability Design ✔ RAID Configuration & Server Hardware (iLO, iDRAC, IPMI) #Network, System & Security Assessments: Network Security Assessment Vulnerability Assessment IT Infrastructure Assessment Risk Assessment Cybersecurity Assessment Active Directory Security Assessment Cloud Security Assessment Firewall & VPN Security Assessment #Linux & Windows Server Administration Linux: RHEL, CentOS, Ubuntu, Debian, SLES, Kali Windows: Server 2012–2022, Windows 10/11 ✔ SCCM, WSUS ✔ Patch Management ✔ System Hardening ✔ 24/7 Monitoring ✔ Performance Optimization #Backup & Disaster Recovery • Veeam • Azure Backup • Windows Server Backup • Snapshot Management • rsync • NAS & OBS Storage #CCTV / Video Surveillance CCTV System Design & Deployment IP Camera Installation & Configuration NVR / DVR Setup and Troubleshooting Video Surveillance Network Design PoE Switch Configuration for Cameras Remote CCTV Monitoring Setup Camera Storage & Video Retention Management Surveillance System Troubleshooting Multi-site Camera Deployment Secure CCTV Network Architecture

  • Cisco Meraki
  • macOS
  • Digital Forensics
  • Network Administration
  • System Administration
  • Network Security
  • Data Recovery
  • Azure DevOps
  • Microsoft Intune
  • Palo Alto Firewalls
  • Office 365
  • Microsoft Active Directory

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