Backend Engineering

The Infrastructure Behind
Every Business That Scales.

The most beautiful product in the world will fail if the system underneath it is slow, fragile, or built without a plan for tomorrow. We design and build the backend infrastructure that lets ambitious companies grow without fear of what happens at the next order of magnitude.

99.9%
Average uptime across client production systems we operate

When your backend becomes your ceiling

Most startups build fast to get to market — which is the right call. But when the technical shortcuts taken at speed become the structural limitations of your growth, the cost of not fixing them compounds every single week. Here is what we see in almost every audit we conduct:

Slow, undocumented APIs that take seconds to respond under normal load — and time out entirely when traffic spikes.
A monolithic codebase that cannot be modified in one area without risking something completely unrelated breaking somewhere else.
Technical debt so deep that new features require weeks of archaeology before a single line of new code can be written.
Unplanned downtime killing revenue and trust at exactly the moments when growth should be accelerating — product launches, campaigns, seasonal peaks.

Our approach: build for the next 10x, not just today

We do not just write code — we architect systems. Before we write a line, we map your data model, define your service boundaries, and plan your scaling strategy. Every structural decision is made with future load, future features, and future maintainability in mind.

Clean, modular architecture with clearly defined service boundaries — so new engineers can onboard fast and new features can be added without fear.
Fully documented APIs — versioned, authenticated, and designed to handle whatever load you throw at them today and at 10x scale tomorrow.
Security built in from day one — not bolted on after a breach. OWASP practices, proper authentication flows, and hardened infrastructure at every layer.
Observable systems with proper logging, alerting, and monitoring — so you know the exact state of your infrastructure at any point, not just when something breaks.
What We Deliver

The full stack of
backend engineering

From architecture design through deployment and monitoring, here is exactly what you get when Liquid Shape builds your backend infrastructure.

System Architecture Design

We map your entire data model, define your service boundaries, and produce a detailed architecture document — scaling strategy, technology choices, and rationale all included — before a single line of production code is written. Architecture decisions made early are the cheapest ones you will ever make.

REST & GraphQL APIs

Versioned, authenticated, fully documented APIs designed to handle whatever you throw at them — from a few hundred requests a day to millions. RESTful when simplicity is paramount, GraphQL when your data relationships demand flexibility. Every endpoint covered by automated tests and protected by rate limiting.

Database Design & Optimisation

Schema design, indexing strategies, query optimisation, and migration planning for PostgreSQL, MySQL, and MongoDB. We design for read performance from day one and build in the partitioning and caching strategies your application will need as data grows. No more queries that run fine in development and grind to a halt in production.

Authentication & Security

JWT, OAuth 2.0, and session-based authentication implemented correctly. Role-based access control enforced at the API layer. Rate limiting, input sanitisation, SQL injection prevention, and CSRF protection as standard. We follow OWASP best practices throughout and build in security review checkpoints at every stage — not as an afterthought before launch.

Cloud Infrastructure (AWS / GCP / Vercel)

Infrastructure as code (Terraform / CloudFormation), auto-scaling groups, CDN configuration, load balancing, and cost-optimised deployments on AWS, GCP, or Vercel — chosen for your workload and budget, not our vendor preference. We hand over complete infrastructure documentation so your team can own and operate it independently.

CI/CD & Monitoring

Automated testing pipelines that run on every pull request, deployment workflows with zero-downtime releases, and a full observability stack — error tracking (Sentry), uptime monitoring, performance dashboards, and intelligent alerting. You know exactly what is happening in your production environment before your users do.

How We Work

Five stages. No surprises.

Backend projects fail when architecture decisions are deferred and security is treated as an afterthought. Our process addresses both from the first day.

01

Discovery & Audit

We review your existing codebase, infrastructure, and data model. We map current bottlenecks, security gaps, and scaling constraints before prescribing anything.

02

Architecture Design

A full architecture document produced and reviewed with your team — service boundaries, data flows, technology choices, and scaling strategy. Approved before development starts.

03

Development

Clean, tested, documented code written in two-week sprints. API-first development with Swagger/OpenAPI documentation generated alongside the build.

04

Testing & Security

Unit, integration, and load testing. Security review covering the OWASP Top 10. Penetration testing on authentication flows and data access layers before any production deployment.

05

Deploy & Monitor

Zero-downtime production deployment. Full observability stack configured. Runbooks and architecture diagrams handed over. Ongoing monitoring and on-call support available.

Why Liquid Shape

Three things that
make us different

There are backend engineering firms. Here is why companies that care about the full picture choose us.

01

Full-stack team with no silo between backend and frontend

The most expensive bugs in any product are the ones that live in the gap between the API contract and the UI that consumes it. Because we build both layers, that gap does not exist for our clients. Your backend is designed with the frontend in mind from day one — and vice versa. Fewer integration issues, faster delivery, tighter performance.

02

Security is first, not last

Most teams treat security as a checklist item before release. We treat it as a design constraint from the first architecture session. Authentication flows, data access patterns, input validation, secret management — all of these are considered at the point where they are cheapest to get right, which is before the code exists, not after a breach.

03

Built to handover cleanly, with full documentation

We build systems you can actually own. Every project ships with full API documentation, architecture diagrams, infrastructure runbooks, and annotated code. Your internal team — or the next engineering partner you work with — should be able to understand, operate, and extend the system without requiring us in the room. That is the standard we hold ourselves to.

99.9%
Average Uptime
Across all client production systems
42ms
Avg API Response Time
p95 across production endpoints
2.8M
Requests Per Day Handled
Peak load on highest-traffic system
0
Security Incidents
Across all client systems since founding
FAQ

Questions we get asked

Direct answers to what clients want to know before starting a backend engagement with us.

Our default backend stack is Node.js (TypeScript) with PostgreSQL on AWS or GCP — a combination we know extremely well and that has proven reliable across dozens of production systems. That said, we are not dogmatic about tooling. If you have existing infrastructure in Python, Go, or another language, or a database we have not mentioned, we will audit what you have and make a recommendation based on your actual needs — not what is most familiar to us. The stack should serve your business, not the other way around.
Yes, and this is actually the majority of our backend work. Very few companies need a complete greenfield build. More often, the ask is to audit what exists, identify the most critical performance or stability problems, and address them systematically without breaking what already works. We start every existing-system engagement with a structured audit — code quality, security posture, performance bottlenecks, and architectural concerns — and produce a prioritised remediation plan before touching anything.
Security is a process, not a milestone. We follow OWASP best practices throughout the development cycle — not as a checklist before launch. Authentication and authorisation are designed into the architecture phase. Input validation and injection prevention are enforced at the data layer. Sensitive configuration is managed through secrets management (AWS Secrets Manager, environment-level injection — never in source control). Before production deployment, we conduct a targeted security review of all authentication flows, data access patterns, and third-party integrations. For higher-risk systems, we recommend and facilitate independent penetration testing.
Yes, documentation is a first-class deliverable on every backend project — not an afterthought. You receive: full OpenAPI/Swagger API documentation generated from the codebase; architecture diagrams covering system design, data flows, and infrastructure topology; database schema documentation with ERD; infrastructure runbooks for common operational tasks; deployment and rollback procedures; and environment setup guides so new engineers can get running without reverse-engineering the system. If you cannot operate and extend what we build without us in the room, we have not finished the job.
Every system we design is built for 10x your current load from the outset. In practice, this means: horizontal scaling considered at the architecture level so stateless services can be replicated without code changes; database indexing strategies designed for production data volumes, not development seeds; caching layers (Redis, CDN) built in where appropriate rather than retrofitted; asynchronous processing for any operations that do not need to block the request cycle; and infrastructure configured for auto-scaling on both application and database tiers. We will also be honest with you — some optimisations only make sense at scale, and over-engineering has a cost. We calibrate the investment to your realistic growth trajectory.
Ready when you are

Ready to build infrastructure that
never lets you down?

Book a free 30-minute technical strategy session. We will review your current architecture, identify your most critical risks and bottlenecks, and show you exactly what needs to change — no sales pitch, no obligation.