06/16/2026 updated
100 % available
Email Validation Specialist | Real-Time API & List Cleaning | FlareReach
Novisad, Serbia
Only remote
About me
We build FlareReach - a real-time email validation API. On this profile we offer hands-on email list cleaning and validation services for teams who need clean data fast, without committing to a full API integration first.
Application Programming Interfaces (APIs)Data ValidationDirect MarketingEmail ManagementEmail ProductionMessaging Application Programming InterfaceVerification and Validation (Software)Email ProcessingApi DesignEmail Security
I specialize in real-time email validation and API development. I co-founded and operate FlareReach, an email validation API built for developers and growth teams, and bring hands-on experience across the full email deliverability stack.
Email validation & deliverability:
Syntax and format validation, SMTP-level mailbox existence checks, MX record verification, domain validation, disposable and temporary email detection (tracking 150,000+ disposable domains), role-based address detection (info@, support@, admin@), subaddress and alias detection, spam trap identification, catch-all domain detection, free email provider detection, SPF record validation, DMARC record validation, bounce rate reduction, sender reputation protection, email deliverability optimization.
API & backend development:
RESTful API design and development, API architecture, high-throughput API infrastructure (sub-2s response times), API authentication and key management, rate limiting, webhook integration, JSON response design, API documentation, developer experience (DX) design, scalable backend systems.
Data engineering & processing:
Bulk data processing, CSV parsing and generation, data cleaning, data deduplication, data formatting and normalization, large-scale list processing (handling lists from hundreds to hundreds of thousands of records), data pipeline design, data validation rules engines.
Use cases & domain knowledge:
Cold email outreach optimization, lead list hygiene, CRM data cleaning, signup form validation, onboarding flow optimization, email marketing campaign preparation, growth marketing infrastructure, SaaS product development, B2B SaaS pricing and packaging, freemium business models, developer tools and API products.
Tools & integrations:
RapidAPI marketplace integration, API key-based authentication systems, CSV-based bulk processing tools, integration with email marketing platforms and CRMs, webhook-based real-time validation flows.
Soft skills & approach:
Technical product development from concept to launch, working directly with developers and marketing teams to understand validation requirements, clear technical documentation, fast turnaround on bulk validation requests, transparent and detailed reporting (no black-box valid/invalid flags — every address gets a full data breakdown).
I work with developers building signup flows, marketers running cold outreach or email campaigns, and growth teams maintaining clean CRM data. Whether you need a one-time list cleanup or an ongoing API integration, I bring direct, hands-on experience building and operating this exact type of system.
Experience
Professional experience5 - 10 years
Freelancer since2016
Languages
GermanBasic knowledgeEnglishNative speaker
Project history
Aufbau und Betrieb von FlareReach, einer Echtzeit-API zur E-Mail-Validierung für Entwickler und Growth-Teams. Verantwortlich für API-Architektur, Backend-Infrastruktur und Produktentwicklung. Die API liefert für jede E-Mail-Adresse eine detaillierte Auswertung: Syntaxprüfung, SMTP-Mailbox-Existenzprüfung, MX-Record-Verifizierung, Erkennung von Wegwerf-Domains, rollenbasierten Adressen und Spam-Traps sowie SPF/DMARC-Prüfung der Domain. Antwortzeiten unter 50ms.