Principal Full Stack Engineer (Slack Migration Engineer)

Slack Migration EngineerAbout the ClientOur client is one of the world's leading meal kit companies, delivering more than 120 million meals annually to over 4 million households across 14 countries and 3 continents. Their technology ecosystem powers a wide range of business-critical functions, including procurement tools, conversion rate optimization, live pricing systems, payment services, and upselling platforms.As part of a major enterprise initiative, the company is undertaking a migration of 10,000+ users from Slack Enterprise Select to Slack Enterprise+ and is seeking an experienced engineer to lead the technical workstream of this business-critical project.The OpportunityWe are looking for a highly autonomous and technically strong engineer who can independently own the technical risk surface of the migration. This role requires making critical decisions around application compatibility, designing testing methodologies from scratch, creating operational runbooks, and bridging the gap between Slack's recommendations and the organization's need for operational certainty.You will be responsible for the technical workstream end-to-end, ensuring a seamless migration with minimal disruption to business operations.What You'll DoLead the technical risk assessment for Slack applications, workflows, integrations, and custom automationsEvaluate app compatibility and provide clear migration readiness recommendationsDesign and execute migration testing strategies, including smoke tests and downtime scenario validationDevelop comprehensive runbooks that can be executed under time-sensitive conditionsCoordinate with app owners, workflow owners, internal stakeholders, and Slack Professional Services teamsTranslate Slack guidance into practical implementation plans while identifying risks and mitigation strategiesMake informed technical decisions regarding:App compatibility classificationsTesting methodologiesSandbox configurationsRunbook contentVendor engagement and escalation approachesEnsure the migration is thoroughly tested, operationally sound, and minimizes business disruptionRequired QualificationsTechnical SkillsStrong experience with JavaScript, TypeScript, and PythonDeep understanding of Slack's platform architecture, including:Web APIEvents APIRTM APIWebhooksWorkflowsBot tokensOAuth scopesSlack apps and legacy integrationsExperience with enterprise-scale Slack administration or Slack application developmentHands-on experience with AWSAbility to review, assess, and make risk-based decisions on custom application code across multiple languages and frameworksExperience designing testing methodologies independently, including validation of hard and soft downtime scenariosProfessional SkillsStrong operational discipline and experience creating detailed runbooksAbility to work independently and navigate ambiguityExcellent stakeholder management and communication skillsProven ownership mindset and decision-making capabilityUpper-Intermediate English level or higherNice to HaveExperience leading enterprise SaaS platform migrationsFamiliarity with Slack Workflow Builder, Zapier, and custom workflow automation platformsExperience with SSO and SCIM provisioning in enterprise environmentsBackground supporting operations, logistics, manufacturing, or food production environmentsUnderstanding of operationally critical workflows and their business impactWhy Join?Own a high-visibility enterprise migration affecting 10,000+ usersWork directly with global stakeholders and Slack Professional ServicesSolve complex technical and operational challenges at scaleMake key architectural and risk-management decisions with significant business impactJoin a technology-driven organization operating across multiple continentsIf you enjoy owning complex migrations, making critical technical decisions, and working at enterprise scale, we'd love to hear from you.