Domain-Driven Architecture
Decoupling complex business logic into independent microservice domains with strict API contracts and database isolation.
CUSTOM SOFTWARE ENGINEERING
Bespoke enterprise systems, precisely engineered.
We architect and build custom microservices, event-driven backends, and multi-tenant SaaS applications tailored to complex operational logic. Built for long-term scalability with zero vendor lock-in.
ENGINEERING SPECS100% IP TRANSFER
Backend LanguagesGo / Python / Node.js / Rust
ArchitectureMicroservices & CQRS
Event BusKafka & Redis Streams
Database LayerPostgreSQL & ClickHouse
Test Coverage> 85% Automated Coverage
Bengaluru Senior Engineers · Zero Outsourcing
100% IP TransferZero Lock-In
Complete source code ownership
> 85% TestsHigh Quality
Automated TDD/BDD pull request gates
2-Week SprintsPredictable Cadence
Fortnightly production staging demos
OWASP HardenedAudited
Security controls & vulnerability scans
01 / CORE ENGINEERING
Enterprise backend architecture capabilities.
Event-Driven Telemetry
Command Query Responsibility Segregation and immutable event logs for 100% auditability across financial and industrial operations.
Row-Level Security Isolation
Multi-tenant database architectures enforcing tenant data isolation, role-based permissions (RBAC), and encrypted secrets.
02 / ENGINEERING METHODOLOGY
We write software designed to be inspected, maintained, and operated for years.
Every codebase we deliver includes automated CI/CD pipelines, clear inline documentation, architectural decision records (ADRs), and database migration scripts.
03 / TECH MATRIX
Curated backend toolchain.
01 // LANGUAGES
- Go (High Concurrency)
- Python (FastAPI / ML)
- Node.js (TypeScript)
- Rust (Low Latency)
02 // DATABASES
- PostgreSQL (Relational)
- ClickHouse (Time-Series)
- Redis (Cache & Queues)
- MongoDB (Document)
03 // MESSAGING
- Apache Kafka
- MQTT (Mosquitto/EMQX)
- RabbitMQ
- gRPC Streaming
04 // DEPLOYMENT
- Docker Containers
- Kubernetes Orchestration
- Terraform IaC
- Helm Charts
04 / DEVELOPMENT CADENCE
How we execute custom software builds.
Schema & API Contracts
Mapping entity models, state transitions, and gRPC/REST API contracts upfront.
Bi-Weekly Sprints
Writing automated unit and integration tests with bi-weekly staging deploys.
OWASP & CVE Auditing
Auditing authorization rules, input sanitization, and dependency vulnerabilities.
Codebase Transfer
Full transfer of Git repositories, deployment scripts, and architecture docs.
05 / INSPECTABLE CODE
Custom software code snippets.
services/ledger.go
Decoupled Go microservice processing ACID-compliant transactions with Redis caching and PostgreSQL persistence.
1package main23import (4 "context"5 "fmt"6 "time"7)89type Transaction struct {10 ID string `json:"id"`11 Amount float64 `json:"amount"`12 TenantID string `json:"tenant_id"`13 Timestamp time.Time `json:"timestamp"`14}1516func ProcessTransaction(ctx context.Context, tx Transaction) error {17 // Execute Row-Level Tenant Security Isolation18 return DB.Exec(ctx, "INSERT INTO ledger (id, amount, tenant_id) VALUES ($1, $2, $3)", tx.ID, tx.Amount, tx.TenantID)19}06 / GUARANTEES
Contractual software guarantees.
100% IP Transfer
Complete source code and architecture artifact ownership transferred upon milestone completion.
Zero Vendor Lock-In
Built using open standards, standard Docker containers, and documented SQL/API contracts.
Upfront Mutual NDA
Protecting your proprietary business logic with formal non-disclosure agreements.
PRODUCTION PROOF
BJSN OS: Custom Construction ERP System
An 11-module custom ERP system replacing six fragmented spreadsheets with a single live ledger covering tendering, procurement, site execution, billing, and audit.
BJSN OS SYSTEM SPEC11 MODULES LIVE
• Single ACID Ledger Engine
• Row-Level Site Permission RBAC
• Digital Gate Pass Verification
• Audit-Ready Finance Export
07 / CUSTOM SOFTWARE FAQS
Questions about our custom software engineering?
Do I get full source code and IP ownership?
Yes, 100%. All source code repositories, database schemas, deployment pipelines, and technical documentation are fully transferred to your organization upon milestone sign-off.