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Backend & Platform Engineering

08 / 10Product Engineering

An abstract view of a backend: requests flow from the API to services, the database, queues, workers and the infrastructure underneath, with live figures for request rate, latency, error rate and deployments.

The systems behind the experience

The product is only as strong as what runs underneath it.

Backend architecture, APIs, databases, integrations and infrastructure decide how fast, safe and dependable a product feels, and whether it keeps feeling that way as usage grows.

What the user sees
What runs underneath

POST /v1/checkout200 · 184 ms · 12 spans

A trace of one payment: the tap on Pay sends a checkout request that verifies the session, loads the cart from cache and database, creates a payment with the provider, writes the ledger and publishes an event, all in 184 milliseconds. After the response, workers send the receipt and reserve inventory, and a webhook notifies the warehouse.

Capabilities

Everything the product stands on.

Twelve disciplines, one platform team. Hover a row to see each one at work.

  1. 01

    APIs

    Versioned REST and GraphQL APIs with clear contracts, pagination and consistent errors.

    • REST
    • GraphQL
    • gRPC
  2. 02

    Backend Systems

    Services organised by domain, with clean boundaries so teams can ship independently.

    • Node.js
    • Go
    • Laravel
  3. 03

    Database Architecture

    Schemas, indexes and migrations designed around the queries you actually run.

    • PostgreSQL
    • MySQL
    • MongoDB
  4. 04

    Authentication

    Sessions, OAuth, SSO and roles, implemented once and enforced everywhere.

    • OAuth 2.0
    • SAML
    • RBAC
  5. 05

    Payments

    Checkout, subscriptions and refunds with idempotency and a ledger you can reconcile.

    • Subscriptions
    • Invoicing
    • Ledger
  6. 06

    Queues

    Durable queues that keep slow work away from fast responses.

    • SQS
    • RabbitMQ
    • Kafka
  7. 07

    Background Jobs

    Scheduled and event-driven jobs with retries, backoff and full visibility.

    • Cron
    • Retries
    • Dead letters
  8. 08

    Integrations

    Dependable links to CRMs, ERPs and third-party APIs, with signed webhooks both ways.

    • Webhooks
    • ETL
    • Partner APIs
  9. 09

    Caching

    Redis and edge caching with sensible invalidation, so hot paths stay fast.

    • Redis
    • CDN
    • Invalidation
  10. 10

    Observability

    Metrics, structured logs and traces that explain what happened, and why.

    • OpenTelemetry
    • Logs
    • Traces
  11. 11

    Infrastructure

    Networks, clusters and databases defined as code, reproducible in any region.

    • AWS
    • GCP
    • Terraform
  12. 12

    CI/CD

    Pipelines that test, build and roll out every change safely, with instant rollback.

    • GitHub Actions
    • Canary
    • Rollback

System architecture

One request, six layers deep.

Hover a layer to pull it out of the stack. Every request passes through all six on its way down and back.

Web, mobile and partner apps. Every request carries an identity and a trace ID from its very first hop.

Requests
12.4k/s
Edge p95
38 ms
Apps
4

Authentication, rate limiting and routing at the edge, so services only see requests that should reach them.

Routes
186
Rate limit
600/min
Blocked
0.3%

Domain services that own their data and talk through clear APIs and events, so each can change on its own.

Services
9
Replicas
42
Deploys/week
31

A primary with read replicas, a cache in front and backups that are tested, not assumed.

Queries
8.1k/s
Cache hit
94%
Restore point
5 min

Queues and workers take slow or unreliable work off the request path and retry it safely.

Jobs
2.3k/min
Queue lag
0.4 s
Retried
0.2%

Containers, managed databases and networking, defined as code and spread across three zones.

Zones
3
Nodes
18
Uptime
99.99%

Reliability

Built for when things get busy.

One illustrative launch-day hour: traffic up nine-fold, a bot attack and a lost zone. Select a pillar to see how it holds.

Autoscaling services, connection pooling and read replicas absorb sudden surges while response times stay where they were.

  • Horizontal autoscaling
  • Read replicas
  • Load shedding

Rate limits, a web application firewall and least-privilege access keep abuse out, even when it arrives with the rush.

  • WAF & rate limits
  • Secrets management
  • Audit logs

Caching, efficient queries and latency budgets keep responses fast when load is at its highest.

  • Latency budgets
  • Query tuning
  • Edge caching

Metrics, logs and traces in one place, with alerts that fire on the symptoms your users would notice.

  • Distributed tracing
  • SLO alerts
  • Runbooks

Multi-zone deployments, automatic failover and tested backups turn a failure into a blip rather than an outage.

  • Multi-zone failover
  • Point-in-time restore
  • Game days

Engineering process

From first diagram to a platform at scale.

Reliability is designed in at the start and proven before launch, not added after the first incident.

  1. 01

    Architecture

    Domains, data model, APIs and failure modes, mapped before code.

    System design
  2. 02

    Build

    Services, schemas and integrations in small, reviewed increments.

    Working services
  3. 03

    Test

    Unit, contract and load tests that run on every change.

    Test suites
  4. 04

    Harden

    Security review, rate limits, backups and chaos drills.

    Hardening report
  5. 05

    Deploy

    Infrastructure as code and canary releases with instant rollback.

    Live platform
  6. 06

    Monitor

    Dashboards, traces and SLO alerts from the first day in production.

    SLOs & alerts
  7. 07

    Scale

    Capacity planning, tuning and new regions as usage grows.

    Scaling plan

Next step

Solid underneath. Fast on top.

Tell us what your product needs to handle, today and at ten times the size. We’ll design the platform to match.

Build the system behind your product

What's our client are say !

Excellent Service

Synapse rebuilt our pet-care store from the ground up. Launch was on time, conversions are up and the team still answers within the hour.

Founder, CYBE Pet Care

A True Partner

They challenged our brief in the best way. The new identity and site feel like us — only sharper. Our campaign traffic doubled in a month.

Marketing Lead, Darkside Apparel

Fast & Thoughtful

From wireframes to App Store in twelve weeks. Every screen was tested with real travellers, and it shows in our reviews.

Product Owner, Book Now Travel