Backend & APIs

Write idiomatic Go with clear patterns, conventions and maintainable structure

Apply Java standards to Spring Boot services for naming, immutability and exceptions

Structure Spring Boot services with layered design, REST APIs, caching and async

Review REST and GraphQL API designs for naming, errors, pagination and versioning

Choose Stripe Connect charge patterns and setup for marketplaces and platforms

List the verification, KYC and onboarding fields a Stripe Connect account needs

Design usage-based billing with Metronome events, rate cards, invoices and credits

Choose Stripe sandboxes, Checkout or PaymentIntents, tax and billing setups

Build Fastify REST APIs and plugins with JSON Schema validation and error handling

Apply Node.js best practices for TypeScript, streams, modules, errors and testing

Build or review audit trails in TypeScript apps with evlog pipelines and retention

Apply clean, hexagonal and domain-driven architecture to backend refactors

Design scalable REST, GraphQL and gRPC APIs and microservice boundaries

Decode COBOL COMP-3 packed decimal fields and carry values through arithmetic

Write modern C# with records, pattern matching and async code for .NET apps

Build Django 5 apps with async views, DRF, Celery and Channels

Design .NET APIs with ASP.NET Core, Entity Framework, Dapper and caching

Write Elixir with OTP supervision trees and Phoenix LiveView

Design Erlang processes, message passing and error handling on the BEAM VM

Build fault-tolerant multi-node Erlang systems with distributed processes

Build Erlang apps with gen_server, gen_statem and supervisor behaviors

Design event-sourced systems with CQRS, projections and saga orchestration

Build async FastAPI services with SQLAlchemy 2.0, Pydantic V2 and WebSockets

Build GnuCOBOL batch programs with PIC clauses, file handling and cobc flags

Write idiomatic Go 1.21+ with generics, concurrency and production microservices

Design federated GraphQL schemas with caching, security and real-time features

Write type-safe Haskell with advanced type systems and pure functional design

Migrate Hibernate 5 to Hibernate 6 with Spring Boot 3 query and ID changes

Migrate javax imports to the jakarta namespace for Spring Boot 3 upgrades

Write Java 21 code with virtual threads, pattern matching and Spring Boot 3

Configure Maven build phases, goals and profiles for Java projects

Resolve Maven dependency conflicts and manage BOMs in Java projects

Configure Maven compiler, surefire and jar plugins for Java builds

Integrate Stripe and PayPal checkout, subscriptions and webhooks with PCI care

Write idiomatic PHP with generators, SPL structures and modern OOP

Scaffold Python projects with uv, package layout, type checking and tests

Write modern Python 3.12+ code with async, pydantic, FastAPI and performance tuning

Translate Python list, dict and set operations into idiomatic Scala collections

Convert Python closures, decorators and generators into functional Scala

Write idiomatic Scala with immutability, sealed hierarchies and expressions

Map Python standard library and HTTP modules to their Scala equivalents

Translate Python classes, inheritance and dataclasses into Scala

Map Python syntax, comprehensions and formatting to Scala equivalents

Move RestTemplate code to the fluent RestClient API in Spring Boot 3.2

Write idiomatic Ruby and Rails code with metaprogramming and performance tuning

Design saga workflows with compensating transactions for distributed systems

Build Scala systems with Pekko, Akka, Spark, ZIO and Cats Effect

Scaffold and build enterprise Spring Boot services and microservices in Java

Upgrade Spring Boot 2 apps to Spring Boot 3 with pom and Java changes