Developer Package

iOS Image Loading & Caching Performance Engineer

Build an efficient image loading and caching pipeline with downsampling, prefetching, and memory-safe caches.

Premium

iOS App Intents & Siri / Spotlight Integration Builder

Expose app functionality to Siri, Spotlight, Shortcuts, and widgets using the App Intents framework.

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iOS CI/CD Pipeline & Fastlane Automation Engineer

Set up an iOS CI/CD pipeline with signing, testing, TestFlight, and App Store delivery using Fastlane or Xcode Cloud.

Production-Grade Python ETL Pipeline Architect

Design a resilient, observable Python ETL pipeline with idempotency, retries, and structured logging for production workloads.

dbt Project Structure and Modeling Mentor

Architect a clean, layered dbt project with staging, intermediate, and mart models following 2026 best practices.

Airflow DAG Design and Reliability Reviewer

Build robust Apache Airflow DAGs with idempotent tasks, smart retries, dynamic mapping, and clean dependency design.

Data Warehouse Schema and Dimensional Modeling Guide

Design a star schema with fact and dimension tables, slowly changing dimensions, and grain decisions for analytics.

SQL Query Performance Tuning Specialist

Diagnose and optimize slow SQL queries using execution plans, indexing, partition pruning, and rewrite strategies.

Data Quality Framework and Validation Designer

Establish a layered data quality framework with checks, severity tiers, ownership, and automated alerting across pipelines.

Incremental Data Loading and CDC Strategy Advisor

Choose and implement the right incremental load or change data capture pattern to cut cost and improve freshness.

Data Lakehouse Architecture Blueprint

Design a medallion lakehouse with bronze, silver, and gold layers using open table formats and the right file strategy.

PySpark Job Optimization and Skew Buster

Tune slow PySpark jobs by fixing shuffles, partitioning, joins, and data skew while controlling cluster cost.

Data Pipeline Cost Optimization Auditor

Audit your data stack to find and cut wasted spend on compute, storage, and queries without hurting reliability.

Streaming Data Pipeline Architect (Kafka/Flink)

Design a real-time streaming pipeline with exactly-once semantics, windowing, watermarks, and stateful processing.

Data Contract and Schema Governance Designer

Define data contracts between producers and consumers to stop upstream changes from silently breaking pipelines.

Snowflake Performance and Cost Tuning Expert

Optimize Snowflake warehouses, clustering, caching, and queries to cut credit spend and speed up workloads.

BigQuery Cost and Query Efficiency Optimizer

Reduce BigQuery scanned bytes and slot usage with partitioning, clustering, and query rewrites for lower cost.

Data Pipeline Observability and Monitoring Setup

Instrument pipelines with metrics, logs, lineage, and alerts so you detect data incidents before stakeholders do.

Reverse ETL and Operational Analytics Designer

Sync warehouse data back into business tools (CRM, ads, support) reliably with mapping, sync logic, and safeguards.

Data Migration and Warehouse Replatforming Planner

Plan a safe migration between data warehouses with parallel runs, validation, and a phased cutover that avoids downtime.

API Data Ingestion Pipeline Builder

Build a robust pipeline to extract data from REST/GraphQL APIs with pagination, rate limits, auth, and incremental sync.

Slowly Changing Dimension Implementation Coach

Implement SCD Type 1, 2, and hybrid dimensions correctly with effective dating, current flags, and fact join logic.

Data Pipeline Testing Strategy Architect

Design a complete testing strategy for data pipelines spanning unit, integration, data, and contract tests in CI.

Pandas to Production Refactoring Guide

Refactor an ad hoc pandas script into a tested, memory-efficient, production-ready data transformation module.

Data Catalog and Metadata Management Strategist

Stand up a data catalog with ownership, lineage, glossary, and search so people can find and trust data.

Backfill and Reprocessing Strategy Designer

Plan a safe backfill or reprocessing of historical data after a logic fix or schema change without breaking production.

Dagster Asset-Based Pipeline Designer

Design declarative, asset-based data pipelines in Dagster with partitions, dependencies, checks, and freshness policies.

PII Handling and Data Privacy Pipeline Designer

Design pipelines that classify, mask, tokenize, and govern PII to meet privacy regulations without blocking analytics.

Semantic Layer and Metrics Definition Architect

Design a semantic layer with consistent, governed metric definitions so every tool reports the same numbers.

Data Pipeline Incident Postmortem Facilitator

Run a blameless postmortem for a data incident to find root cause, blast radius, and concrete preventive actions.

SQL to dbt Migration and Modernization Guide

Convert tangled stored procedures and ad hoc SQL scripts into clean, tested, version-controlled dbt models.

Idempotent Upsert and Merge Pattern Builder

Build correct, idempotent upsert and MERGE logic so pipeline reruns never duplicate or lose rows across any warehouse.

Analytics Engineering Onboarding and Standards Author

Write a data team standards guide covering naming, modeling, testing, review, and deployment so the stack stays consistent.

SwiftUI Architecture Designer (Observable & MV Pattern)

Design a clean, testable SwiftUI app architecture using the Observation framework, value-type state, and modern navigation.

Swift Concurrency Migration Auditor

Audit existing Swift code for safe migration to Swift 6 strict concurrency, eliminating data races and Sendable warnings.

UIKit to SwiftUI Incremental Migration Planner

Build a screen-by-screen plan to migrate a UIKit app to SwiftUI safely, keeping both frameworks interoperating.

iOS App Performance Profiler & Optimizer

Diagnose and fix iOS performance problems across launch time, scrolling, memory, and energy using Instruments-driven analysis.

App Store Submission & Review Readiness Checklist

Prepare an iOS app for App Store submission and pass review on the first attempt with a tailored compliance checklist.

SwiftUI Custom Animation & Transition Builder

Build polished, performant SwiftUI animations using phase animators, keyframes, matched geometry, and custom transitions.

Swift Networking Layer Designer (async/await + URLSession)

Design a robust, testable Swift networking layer with async/await, typed endpoints, retries, and decoding strategies.

SwiftData Persistence Layer Architect

Design a SwiftData model schema with relationships, migrations, and CloudKit sync that scales beyond a toy example.

iOS Accessibility Audit & VoiceOver Optimizer

Audit an iOS screen for accessibility and produce concrete fixes for VoiceOver, Dynamic Type, and contrast.

StoreKit 2 In-App Purchase & Subscription Implementer

Implement StoreKit 2 purchases and subscriptions with transaction verification, restore, and entitlement management.

Swift Unit & UI Test Strategy Designer

Design a pragmatic testing strategy for an iOS app using the Swift Testing framework, mocks, and XCUITest.

iOS Push Notification & Rich Notification Builder

Implement APNs push notifications including rich media, actions, notification service extensions, and Live Activities.

Swift Memory Leak & Retain Cycle Hunter

Find and fix retain cycles and memory leaks in Swift code involving closures, delegates, and Combine/Tasks.

SwiftUI Layout Debugger & Sizing Fixer

Diagnose tricky SwiftUI layout problems involving frames, GeometryReader, and the layout system, then fix them cleanly.

iOS Widget & Live Activity Developer (WidgetKit)

Build a home screen, lock screen, or StandBy widget plus Live Activities with WidgetKit, timelines, and App Intents.

Swift Code Review & Idiom Modernizer

Get a rigorous Swift code review that improves correctness, readability, and modern idioms without over-engineering.

iOS App Launch Time Optimizer (Pre-main to First Frame)

Cut iOS cold-launch time by attacking pre-main dyld work, app init, and first-frame rendering with measured fixes.

App Store Optimization (ASO) & Metadata Strategist

Optimize App Store listing metadata, keywords, screenshots, and conversion for discoverability and downloads.

Swift Generics & Protocol Design Architect

Design clean Swift generics and protocols using associated types, opaque returns, and primary associated types.

iOS Deep Linking & Universal Links Implementer

Implement Universal Links, custom URL schemes, and deep link routing that lands users on the right screen reliably.

Core Data to SwiftData Migration Engineer

Plan and execute a safe migration from Core Data to SwiftData, or run them side by side during transition.

iOS Crash & Diagnostics Investigator (MetricKit + Crashlogs)

Symbolicate and diagnose iOS crashes and hangs from crash logs, MetricKit reports, and Xcode Organizer.

SwiftUI Reusable Design System Component Builder

Build a reusable SwiftUI design system with tokens, themed components, and consistent styling across the app.

iOS Background Tasks & Sync Engineer

Implement reliable background processing, refresh, and sync using BGTaskScheduler and URLSession background transfers.

Swift Package Manager & Modularization Architect

Modularize an iOS app into Swift packages for faster builds, clear boundaries, and reusable libraries.

iOS Secure Data & Keychain Engineer

Implement secure storage, Keychain access, biometric auth, and data protection following iOS security best practices.

Rust Web Service Backend Architect (Axum)

Design a production Rust web backend with Axum, Tower middleware, sqlx, and structured observability.

Rust Smart Pointer & Interior Mutability Advisor

Choose correctly among Box, Rc, Arc, RefCell, Cell, and Mutex for ownership and shared-state designs.

Rust Iterator & Functional Pipeline Optimizer

Write idiomatic, zero-cost iterator chains and custom iterators that compile to tight loops.

Rust Embedded Async with Embassy Specialist

Build event-driven embedded firmware using embassy async tasks, executors, and HAL on bare metal.

Rust Binary Size & Build Profile Optimizer

Shrink Rust binaries for embedded, wasm, or containers via profiles, stripping, and dependency trimming.

Rust Lock-Free & Atomic Data Structure Designer

Design lock-free queues, stacks, and counters in Rust with atomics, crossbeam, and correct memory ordering.

Rust Idiomatic Refactoring & Code Review Coach

Refactor non-idiomatic Rust into clean, clippy-clean code and run a structured Rust code review.

Rust Network Protocol & Socket Programming Engineer

Implement custom network protocols and high-performance socket servers in async Rust with tokio.

Rust Cross-Compilation & Multi-Target Build Engineer

Set up reliable cross-compilation for Rust to multiple OS, architecture, and embedded targets.

Rust Database & ORM Layer Designer

Design a type-safe async data access layer in Rust with sqlx, SeaORM, or Diesel and sound migrations.

Rust Observability & Tracing Instrumentation Engineer

Instrument Rust services with the tracing ecosystem for structured logs, spans, metrics, and OpenTelemetry.