ESP Migration & Platform Integration Architect

We are a tech-enabled growth firm–at the intersection of marketing, consulting & data intelligence–igniting revenue and brand recognition for leading and emerging companies around the world. As a people-first firm, we value diversity in backgrounds and experiences. We strongly believe our people and culture are key to our success. Our vision is to be recognized as the most valued and respected private growth marketing firm in the world–with a scalable brand, culture and services. Our mission is to power the relentless pursuit of growth and redefine what’s possible through a team of growth-obsessed experts who demand innovation and results - driven by integrity, autonomy, and grit.

As a full-service growth marketing firm, we offer best-in-class services including: SEO, Content Marketing, Paid Media, Social Media Marketing, Programmatic + CTV, Public Relations, Influencer Marketing, Email + SMS, Conversion Rate Optimization, Retail Marketing, and Creative. Here at Power Digital, we are hyper-focused on helping brands drive revenue growth and brand recognition, ultimately driving irrefutable value for our clients. 

At the heart of Power Digital is our proprietary technology, nova, which analyzes businesses through first-party data, simplifying investment planning for marketing and diligence in M&A––putting marketers in a strategic seat at the table––and providing value in unparalleled ways. 

Managing billions in media, our dynamic team––of consultative marketers, creatives, analysts and technologists––challenge traditional ways of planning and measurement through meticulous testing and data science across each milestone of the customer journey.

***This is an independent contractor position.

• Power Digital is looking for a hands-on Email Migration & MarTech Consultant to own the full lifecycle of email platform migrations from technical infrastructure and ESP onboarding to integration architecture, data migration and deliverability configuration.

  You will serve as the subject matter expert and project owner for client email migrations from platforms like Salesforce Marketing Cloud, HubSpot, Iterable, Braze, Mailchimp, ActiveCampaign, Drip, and others to Klaviyo managing everything from DNS/domain configuration and DKIM/SPF/DMARC setup to integration builds, identity resolution, list migrations, automation architecture, cutover sequencing and handoff.

  This includes every phase of the migration engagement end-to-end: discovery, technical build, QA, go-live, and client handoff. The right candidate thrives in complexity, moves with urgency, and knows how to translate technical requirements into clear client deliverables.

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• Own the full project lifecycle for email platform migrations from discovery through go-live and post migration QA
• Lead client kick-offs, migration timelines, stakeholder communications and milestone tracking across concurrent projects
• Serve as the point of contact for all technical migration questions from account teams and clients
• Document migration decisions, integration specs, and handoff notes in a repeatable, scalable format

• Current ESP audit: document all active flows, campaign cadences, segments, suppression lists, custom fields, and data schema from the source platform
• Contact database audit: total addressable list size, engagement health, bounce/spam complaint history, hard suppression list, and consent/opt-in source documentation
• Tech stack mapping: inventory every tool connected to the current ESP (eComm platform, CRM, loyalty, helpdesk, reviews, POS, CDP) before migration begins
• Deliverability baseline analysis: pull sender reputation data from the legacy platform (Google Postmaster, SNDS, blacklist checks) to understand what is being inherited

• Export all contacts, custom properties and segments from the legacy platform in correct format for destination ingestion
• Document legacy flow logic before the migration: triggers, filters, time delays, conditional splits, A/B test configurations
• Extract historical performance data (open/click benchmarks) to inform Klaviyo warming strategy and baseline benchmarking
• Coordinate legacy platform subscription/contract timing against Klaviyo go-live to prevent dual-billing data gaps
• Define and execute legacy flow deactivation sequencing to eliminate risk of duplicate sends or missed sends during cutover

• Define organization-level account structure: single account vs. multi-brand/multi-account setup, sub-account architecture
• Configure user roles and permissions: internal client users, agency access tiers, admin vs. manager vs. viewer
• Create and document API keys: private/public keys, scoped access per integration and key ownership registry
• Advise on billing tier selection: contact tier, SMS credit planning, and overage risk management
• Define and implement External ID / unique identifier strategy across all connected systems
• Install and validate the Klaviyo JS snippet for onsite tracking: Active on Site events, browse abandonment, and onsite behavior
• SDK setup consultation where applicable (mobile app push notification integration)
• Set up and verify profiles, from addresses, reply-to routing, and compliance/governance settings

Configure and validate all email sending infrastructure, including:

• DNS records, SSL certificates, and full domain authentication setup
• DKIM, SPF, and DMARC record configuration and validation
• Sending domain setup, subdomain delegation, and CNAME configuration
• Branded tracking link setup (custom click-tracking domains)
• Dedicated vs. shared IP pool evaluation and configuration
• Conduct pre-send technical audits and inbox placement seed tests before first live send
• Validate DMARC reporting is active and routing correctly post-configuration

• Define the External ID / unique identifier strategy across all connected systems (Shopify customer ID, CRM ID, email, phone)
• Design merge rules for duplicate profiles: same email/different phone, same phone/different email, anonymous vs. identified
• Validate that historical order and event data backfills attach to the correct unified profile post-migration
• Coordinate identifier logic with eComm platform, CRM, and any CDP in the stack
• QA identity resolution outcomes on a representative sample before full list migration

Manage the full integration setup between ESPs and connected tech stacks, including:

• Native platform integrations: Shopify, eComm-native platforms, and non-Shopify platforms
• Custom API integration builds and webhook migrations
• Third-party tool reconnections (reviews, loyalty, subscriptions, helpdesk, POS, etc.)
• Deep link configuration and custom event setup, migration, and validation
• OneTrust and consent management platform migration
• Opt-in form migration and lead capture verification
• Verify native event sync and validate custom event payloads post-integration

• Own all subscriber data migrations: historical profile transfers, suppression list mapping, and compliance preservation
• Manage user schema migrations and data backfills between legacy and destination platforms
• Set up and validate segment/list structures to support IP warming strategy
• Ensure all opt-in and consent status is correctly mapped to maintain GDPR and CAN-SPAM compliance
• QA migrated data sets to verify accuracy, completeness, and field mapping

• Develop and oversee IP/domain warming schedules (1–3 months of structured warming depending on engagement tier)
• Build campaign warming strategies: volume ramp-up plans, engagement-based list segmentation, and send cadence mapping
• Monitor sender reputation signals throughout warming: spam rates, bounce rates, inbox placement scores
• Define intervention thresholds and execute deliverability remediation when reputation signals degrade
• Monitor Google Postmaster Tools and Microsoft SNDS continuously during and after warming

• Translate legacy flow/journey logic into equivalent Klaviyo automation architecture:
• Trigger mapping: list-based, date-based, and event-based triggers to Klaviyo metric triggers or custom events
• Conditional split reconstruction using Klaviyo segment conditions and profile properties
• Time delay and time zone strategy: Klaviyo handles time zones differently from most legacy platforms
• Suppression-within-flow logic: smart sending rules, mid-funnel suppression, flow filters vs. trigger filters
• A/B test migration: rebuilding winner-take-all or 50/50 tests in Klaviyo’s native test environment
• Build flows from scratch when legacy logic cannot be directly migrated
• Oversee campaign and template builds across warming sends, flows, and acquisition programs
• Set up acquisition opt-in forms and connect to relevant list/segment structures
• Build custom reporting dashboards and configure reporting templates within the platform

• Integration QA: verify all events fire correctly into Klaviyo from source (placed order, checkout started, viewed product, etc.)
• Profile sync QA: confirm custom properties, consent fields, and identifiers populate correctly on test profiles
• Flow QA: trigger each flow in test mode, validate rendering across email clients, confirm suppression logic holds
• DNS/auth QA: MXToolbox pass, DMARC reporting active, inbox placement seed test before first live send
• Post-warmup QA: monitor bounce rate, spam complaint rate, and unsubscribe rate after each warming send with documented thresholds
• Data QA: spot-check migrated profiles against source records for field mapping accuracy and completeness

• Define the exact cutover date and no-send window to prevent duplicate sends from both platforms
• Execute legacy flow deactivation in the correct sequence before Klaviyo flows activate
• Manage the overlap period: communicate clearly which campaigns are managed in which platform during transition
• Run final pre-launch checklist sign-off across all technical, data, and flow readiness criteria
• Own post-launch 30-day monitoring plan with defined escalation triggers and response protocols

• 3–6+ years of hands-on experience in lifecycle and CRM marketing technology, ESP migrations, and/or martech implementation
• Deep, proven expertise in at least two of the following ESPs: Klaviyo, Salesforce Marketing Cloud, HubSpot, Iterable, Braze, Mailchimp, Attentive, or similar
• Hands-on experience configuring DNS records and email authentication protocols
• Experience with sending domain setup, subdomain delegation, and tracking link configuration
• Proven ability to manage API integrations, webhook configurations, and custom event setups
• Experience with subscriber data migrations including schema mapping, backfill logic, and suppression management
• Strong IP warming knowledge: including warming schedules, list segmentation strategy, and reputation monitoring
• Experience in an agency or client services environment, managing multiple concurrent client projects as agreed upon in contract
• Experience auditing and extracting data from legacy ESPs (Mailchimp, SFMC, HubSpot, ActiveCampaign, Drip, Iterable, or Braze) as the source platform
• Experience defining identity resolution strategy and handling duplicate profile logic during migrations
• Ability to translate legacy flow/journey logic into equivalent Klaviyo automation architecture
• Experience building and executing structured checklists for integration validation and testing
• Ability to own a cutover plan including legacy platform deactivation and go-live sequencing

• Proficiency in DNS management tools (Cloudflare, Route53, GoDaddy DNS, Google Domains)
• Familiarity with REST APIs, JSON payloads, and webhook event structures
• Working knowledge of eCommerce platforms (Shopify, BigCommerce, Magento, WooCommerce) and their native ESP integrations
• Familiarity with consent management platforms (OneTrust, Cookiebot, or similar) in an email context
• Experience using deliverability tools (MXToolbox, GlockApps, 250ok, Validity/Everest, or similar)
• Comfort with spreadsheet-based scoping, project tracking, and client documentation
• Klaviyo JS snippet installation and onsite tracking validation
• Google Postmaster Tools and Microsoft SNDS for sender reputation monitoring
• Experience with Klaviyo's External ID and identity resolution architecture
• API key management and scoping across integrated systems