Engineering & Software Development

WebAssembly Engineer

Compiling Rust or C++ to WebAssembly unlocks real performance gains in the browser, but only if the sandboxing, memory model, and host-binding layer are done correctly, get it wrong and you've shipped a slow, unsafe binary instead of a fast, safe one. We handle Rust and C++-to-WASM compilation, sandboxing configuration, and the host-binding performance work that determines whether your WASM module actually runs faster than the JavaScript it's replacing. This is for teams with a genuine performance-critical workload (image processing, simulation, codecs) where WASM is the right tool, not a novelty. You get a working WASM module with the performance numbers to justify the added complexity.

This is a capability we deliver for you as a service, not a role we’re hiring for.

How We’d Approach This

A clear, staged plan, not a black box

These are the service-specific steps inside our six-step process.

1
Confirm the workload is actually performance-bound in a way WASM will meaningfully improve, not assume it.
2
Build a pilot compilation of the core hot path and benchmark it against the current JavaScript implementation.
3
Review the benchmark results and sandboxing/security posture with your team before full integration.
4
Complete the full WASM module with host bindings and integrate it into your application.

What You Get

Deliverables from this engagement

Compiled, working WASM module from Rust or C++ source
Benchmark comparison against the prior JavaScript implementation
Host-binding integration code
Documentation of the sandboxing and security configuration

Six Ways We Could Architect This

Different engagement, different build, pick the shape that fits

There’s more than one way to deliver on this service. Browse a few of the ways we’d structure the work, depending on your speed, budget, and integration needs.

Read all 6 architectures as text

Lean Fast-Start Architecture

Source Compilation

Rust or Cpp Source
WASM Compiler Toolchain
Compiled WASM Module

Host Bindings

JavaScript Glue Code
Simple Host Function Imports
Memory Buffer Sharing

Benchmarking

Baseline JS Benchmark
WASM Module Benchmark
Performance Comparison Report

Delivery

Bundle WASM into App
Browser Integration Test
Deployment to Production

Cloud-Native / Managed Services Architecture

Cloud Build Pipeline

Source Repository
CI WASM Build Job
Artifact Registry

Delivery Infrastructure

CDN Hosted WASM Binary
Compression and Caching Layer
Edge Function Runtime

Managed WASM Runtime

Sandboxed Execution Environment
Wasmtime Managed Runtime
Resource Limit Enforcement

Operations

Performance Monitoring Dashboard
Error Tracking Service
Automated Rollback on Regression

Event-Driven & Automation-First Architecture

Compute Triggers

User Action Event
File Upload Event
Scheduled Batch Job

Automated Execution

WASM Module Invocation
Worker Thread Pool
Result Callback Queue

Automated Pipeline

Auto Compile on Commit
Auto Benchmark on Build
Regression Gate Before Merge

Feedback

Performance Regression Alert
Build Status Notification
Developer Slack Channel

Enterprise-Grade & Compliance-Ready Architecture

Sandboxing and Security

Memory Isolation Boundary
Capability Based Imports
Fuzz Testing Harness

Governance

Dependency Security Review
Supply Chain Signing
Change Approval Process

Resilience

Redundant Execution Nodes
Resource Quota Enforcement
Failover Runtime Instance

Audit and Compliance

Execution Audit Log
Security Review Report
Compliance Sign Off

AI-Augmented, Human-in-the-Loop Architecture

AI Performance Analysis

Profiling Data Stream
AI Hot Path Detection Model
Suggested Optimization Set

Human Review Checkpoint

WASM Engineer Review
Approve Optimization Patch
Reject and Refine

Rollout

Staging Benchmark Validation
Production Deployment
Live Performance Verification

Continuous Learning

Post Deploy Performance Data
Model Retraining Pipeline
Optimization Pattern Library

Integration-Heavy / Ecosystem-Connected Architecture

WASM Module Core

Compiled WASM Binary
Host Binding Layer
Memory Management

Application Integration

Web Application Frontend
Native App Embedding
Server Side Runtime

Tooling Ecosystem

Build System Integration
Package Registry Publishing
Debugger Integration

Data Systems

Shared Memory Data Exchange
Analytics Event Export
Error Reporting Service

Ready to get started?

Tell us what you’re trying to get done and we’ll help you find the highest-leverage place to start, scoped small enough to prove itself before you commit to anything bigger.

Talk to us about WebAssembly Engineer

Most engagements like this start as a $500–$2,500 pilot, see full pricing.