REST & GraphQL done right
Consistent resource design, pagination, filtering, and errors developers can predict.
Get in TouchCustom API Development
APIs Built to Last
REST and GraphQL services with the boring parts done right: auth, versioning, docs, and observability.
Start Your Custom API Development ProjectOverview
Built Right, From the Start
Secure, documented, versioned APIs and integrations.
What we’re good at
- REST & GraphQL done right: Consistent resource design, pagination, filtering, and errors developers can predict.
- Auth & security first: OAuth2/JWT, rate limiting, and input validation designed in, not bolted on.
- Versioning strategy: Breaking changes managed so your integrators never wake up to a broken app.
- Documentation that works: OpenAPI specs and interactive docs your partners can integrate against in hours.
16K+Projects Completed
3000+Global Clients
6Offices Worldwide
98%Client Retention
What You Get
Engineered For Outcomes
Every capability that goes into your project, done properly.
Auth & security first
OAuth2/JWT, rate limiting, and input validation designed in, not bolted on.
Get in TouchVersioning strategy
Breaking changes managed so your integrators never wake up to a broken app.
Get in TouchDocumentation that works
OpenAPI specs and interactive docs your partners can integrate against in hours.
Get in TouchObservability built in
Logging, tracing, and alerting so you know about problems before your users do.
Get in TouchThird-party integrations
Payments, shipping, ERPs: we connect your systems to the world.
Get in TouchWho It's For
Industries We Serve
We’ve delivered custom api development for teams across these industries — and we’re just as comfortable if yours isn’t on the list yet.
Government & Public SectorBanking & Islamic FinanceReal Estate & ConstructionOil, Gas & EnergyHospitality & TourismLogistics & TransportRetail & E-commerceHealthcareEducationSports & EventsSaaS & StartupsMedia & Entertainment
The Difference
Coding Souls vs. Typical Agencies
What actually changes when you bring your custom api development project to us instead of a generic outsourcing shop.
FactorCoding SoulsTypical Agencies
Code OwnershipYou own 100% of the source code and IP from day one.Often licensed or withheld until final payment clears.
Team StructureA dedicated senior team assigned to your project throughout.Work is frequently reassigned or subcontracted mid-project.
CommunicationWeekly demos and direct access to your engineers, not just a PM.Updates filtered through account managers, engineers rarely visible.
Pricing ModelFixed-scope quotes with milestones agreed upfront, no surprise invoices.Scope creep and hourly overruns are common industry practice.
Post-Launch SupportIncluded maintenance window plus ongoing support plans after launch.Support often ends at handover unless a new contract is signed.
DocumentationArchitecture notes and handover docs ship with every project.Frequently missing or an afterthought if requested late.
Why Coding Souls
Built On Trust
The practices behind every engagement, not just the pitch.
01
End-to-End Expertise
Strategy, design, engineering, and support under one senior team.
02
Modern Technology
A stack chosen for longevity and performance, not hype cycles.
03
Scalable & Secure
Architecture built to grow with you, hardened from day one.
04
Transparent Process
Weekly demos, honest estimates, and zero surprises at handover.
05
Risk Managed Delivery
Scope, budget, and timeline risks are flagged early, not discovered at handover.
06
Documentation Included
Architecture notes and handover docs ship with the project, not as an afterthought.
Toolbox
Stack & Deliverables
The technology we use, and exactly what lands in your hands at the end.
Technologies46 technologies
GraphQLFetch exactly what you needRREST APIThe web's default API standard
ggRPCHigh-performance service calls
ttRPCEnd-to-end type-safe APIs
HHasuraInstant GraphQL over your data
KKrakenDHigh-performance API gateway
JJWTStateless authentication tokens
OOAuth2Industry-standard authorization
OOpenID ConnectIdentity layer on top of OAuth2
AAuth0Drop-in authentication platform
CClerkModern auth for React apps
OOktaEnterprise identity management
KKeycloakOpen-source identity & access
AAxiosPromise-based HTTP client
ZZodTypeScript-first schema validation
OOWASPSecurity standards we build to
HHelmet.jsSecure HTTP headers by default
XXMLStill common in legacy integrations
YAMLHuman-readable config format
PostgreSQLReliable & extensible
MySQLProven relational workhorse
MariaDBCommunity-driven MySQL fork
SQL ServerMicrosoft's enterprise RDBMS
MongoDBFlexible, high-speed NoSQL
RedisIn-memory cache & queuesMMemcachedSimple distributed caching
CassandraWide-column, high availabilityDDynamoDBServerless AWS NoSQL
CCockroachDBDistributed SQL at scale
CouchDBDocument store, offline-first
Neo4jNative graph database
ElasticsearchFull-text search & analyticsOOpenSearchOpen-source search & analytics
CClickHouseReal-time analytical queries
IInfluxDBPurpose-built for time series
MMeilisearchFast, typo-tolerant search
AAmazon RDSManaged relational databases
AAmazon S3Durable object storage
SSupabaseOpen-source Firebase alternative
NNoSQLSchema-flexible data modeling
OORMType-safe database access
PrismaType-safe Node.js ORMDDrizzle ORMLightweight TypeScript ORM
SequelizePromise-based Node ORMSSQLAlchemyPython's SQL toolkit
KKnex.jsSQL query builder for Node
Deliverables
- Production API with tests
- OpenAPI documentation
- Auth & rate-limit setup
- Monitoring & alerting
How We Work
Our Process
Four stages, weekly demos, honest estimates. You always know where your product stands.
Step 01
Discover
We map your goals, users, and constraints, and kill risky assumptions before they cost money.
Step 02
Design
Wireframes to polished UI in tight loops, validated with you at every iteration.
Step 03
Build
Senior engineers ship in weekly increments with demos, tests, and honest status.
Step 04
Launch & Grow
Zero-drama deployment, then analytics, iteration, and support that compounds.
FAQ
Frequently Asked Questions
Straight answers on pricing, timelines, ownership, and what happens after launch.
Yes. API rescue is common work. We inventory endpoints, add tests around current behavior, generate OpenAPI docs, then refactor safely behind that safety net.
REST for public/partner APIs and simple domains; GraphQL when many clients need flexible views of complex data. We’ll recommend based on your consumers, not fashion.
Book a free consultation from the contact page. We’ll scope the work, give you a written estimate with assumptions, and you decide from there, with no pressure, no lock-in.
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