Architecting systems.
Building digital products.

Full-stack software engineer & cloud architect. Specializing in high-throughput distributed systems, modern web products, and edge-native scale.

Sirajum Munir
Production Systems & Digital Products

Featured Engineering Projects

Real-world systems, mission-critical distributed architectures, and audited software products. Every project includes structured architectural blueprints and verified production metrics.

Nexus Stream: High-Throughput Event Mesh
Cloud ArchitectureFEATURED

Nexus Stream: High-Throughput Event Mesh

Distributed real-time event broker processing 180k msgs/sec with sub-5ms p99 latency across multi-region Kubernetes clusters.

Verified Outcomes

Reduced p99 ingestion latency from 85ms to 4.2ms

Go / GolangApache KafkaKubernetes (EKS)gRPC & ProtobufRedis Cluster+1 more
Read Architecture BlueprintInteractive Diagram
Aurora Core: Double-Entry Immutable Ledger
Full-Stack SystemFEATURED

Aurora Core: Double-Entry Immutable Ledger

Financial transaction engine supporting strict ACID guarantees, cryptographic audit trails, and multi-currency exchange balancing.

Verified Outcomes

Eliminated 100% of balance discrepancies across 14M transactions

TypeScriptNext.js 15PostgreSQLPrisma ORMTailwind CSS+1 more
Read Architecture BlueprintInteractive Diagram
Chronos: Distributed Cron & Workflow Orchestration
DevOps & SREFEATURED

Chronos: Distributed Cron & Workflow Orchestration

Fault-tolerant cron scheduler executing over 1.2M automated batch jobs daily with exactly-once execution guarantees.

Verified Outcomes

100% SLA adherence over 14 consecutive months

Go / GolangEtcd v3PostgreSQLRedisPrometheus+1 more
Synapse: Semantic Vector RAG & Governance Engine
AI & Data Engineering

Synapse: Semantic Vector RAG & Governance Engine

Enterprise LLM retrieval-augmented generation gateway with streaming latency optimization, PII sanitization, and vector cache.

Verified Outcomes

Reduced OpenAI monthly API spend by 58%

Python / FastAPINext.js 15Qdrant Vector DBRedisOpenAI API+1 more
Interactive Architecture Explorer

System Topology & Data Pipelines

Inspect real distributed blueprints. Select nodes to evaluate tier boundaries, consensus mechanisms, caching strategies, and failover topologies.

Nexus Stream Production TopologyClick any node to inspect protocols & failover architecture
Active Blueprint
Verified Protocols:gRPC / ProtobufHTTPS / RESTACID SerializationRaft Quorum
Node Architecture Deep-Dive

Edge Clients & IoT

Role: Event Producers

System Responsibility

Thousands of distributed telemetry agents pushing events over HTTP/3 & gRPC.

Engineered With

Next.jsMobile SDKgRPC-Web

Inter-Service Pipeline Links

Outbound Dispatches:
To: Envoy API GatewaygRPC
Technical Capabilities

Engineering Matrix & Proven Stack

A concrete record of technologies applied in production. Every capability is anchored by verified architectural implementations rather than abstract percentages.

Distributed Systems & Backend

4 Stack Components
Go / GolangVerified

High-concurrency daemons, raft consensus, zero-copy socket buffers

Built Nexus Stream event mesh routing 180k msgs/sec
Node.js & TypeScriptVerified

Type-safe APIs, microservices, and high-performance server runtimes

Engineered Aurora Core double-entry ledger
gRPC & Protocol BuffersVerified

Low-latency binary inter-service RPC communication

Implemented protobuf streaming contracts for event mesh
Python (FastAPI / Asyncio)Verified

Data pipelines, vector search retrieval, and async services

Built Synapse AI RAG gateway and semantic cache

Databases & Storage Architecture

4 Stack Components
PostgreSQL & PrismaVerified

ACID serializable transactions, index tuning, query plan analysis

Engineered Aurora immutable ledger schema with 0 discrepancies
Redis & In-Memory StoresVerified

Distributed locks, sliding-window rate limiters, pub/sub channels

Implemented semantic vector caching and token bucket limiters
Apache KafkaVerified

Partitioning strategies, consumer groups, exact-once semantics

Managed multi-AZ Kafka cluster processing billions of events
Vector Databases (Qdrant/pgvector)Verified

HNSW indexing, cosine similarity, hybrid sparse/dense retrieval

Deployed production hybrid search for enterprise knowledge bases

Cloud, Infrastructure & DevOps

4 Stack Components
Kubernetes & EKSVerified

Cluster orchestration, custom operators, pod autoscaling, ingress

Orchestrated production microservices across 3 AWS regions
Terraform & IaCVerified

Modular cloud infrastructure provisioning with strict state locking

Automated AWS VPCs, EKS clusters, and RDS multi-AZ replicas
Docker & Container SecurityVerified

Distroless minimal images, multi-stage builds, non-root users

Maintained secure baseline container images across engineering team
Observability (Prometheus/Grafana)Verified

OpenTelemetry instrumentation, alerting rules, distributed tracing

Configured sub-second SLI/SLO dashboards for high-throughput brokers

Modern Web & Frontend Engineering

3 Stack Components
Next.js App Router (15)Verified

React Server Components, server actions, targeted ISR caching

Architected portfolio and admin studio with sub-100ms INP
React 19 & TypeScriptVerified

State machines, custom hooks, accessible interactive visualizations

Built interactive SVG Architecture Explorer engine
Tailwind CSS & Design SystemsVerified

Design token architecture, dark-mode ergonomics, accessible contrast

Created custom dark graphite design system with cyber lime accents
Career Progression

Professional Experience

Demonstrated leadership across high-scale distributed systems and platform infrastructure.

Staff Software Engineer / Distributed Systems Lead

CloudScale Systems
2023-03 — Present

Lead architect for core cloud ingestion infrastructure and real-time event streaming products.

  • Architected global multi-region event mesh handling 180k+ events/sec across 14 enterprise tenants.
  • Mentored a team of 9 senior engineers across Go, Kubernetes, and platform observability disciplines.
  • Reduced 99th percentile ingestion latency by 88% through zero-copy buffer architecture in Go.
  • Saved $450,000 annually in AWS cross-AZ data transfer by optimizing inter-service topology.

Senior Backend / Infrastructure Engineer

Vanguard Fintech Labs
2021-02 — 2023-02

Engineered high-security financial transaction ledgers and automated regulatory reporting engines.

  • Built immutable double-entry ledger in PostgreSQL handling $40M+ in daily transaction volume with 0 discrepancies.
  • Designed and deployed automated distributed cron scheduler running 1.2M jobs daily.
  • Spearheaded SOC2 Type II compliance technical remediation with automated cryptographic log sealing.

Full-Stack Software Engineer

Apex Digital Media
2019-06 — 2021-01

Developed high-traffic media publishing platforms, real-time analytics dashboards, and headless CMS integrations.

  • Migrated monolithic frontend to Next.js with incremental static regeneration, improving Core Web Vitals to 98/100.
  • Designed real-time collaborative editorial preview system using WebSockets and Redis Pub/Sub.
Validated Credentials

Honors & Certifications

CERTIFICATION • 2024-04

AWS Certified Solutions Architect – Professional

Issuer: Amazon Web Services

Validated advanced technical expertise in multi-tier, fault-tolerant enterprise cloud architectures.

HACKATHON • 2023-10

1st Place Winner – Global High-Concurrency Cloud Hackathon

Issuer: Cloud Native Computing Foundation (CNCF)

Built a decentralized Raft consensus proxy that remained available during simulated 60% network partition.

TALK • 2023-06

Keynote Speaker: 'Zero-Copy Microservices with Go & eBPF'

Issuer: GopherCon / Systems Summit

Presented practical production lessons on reducing Linux kernel context switches for socket I/O.

CERTIFICATION • 2022-08

Certified Kubernetes Administrator (CKA)

Issuer: The Linux Foundation & CNCF

Demonstrated production cluster provisioning, RBAC configuration, network policies, and troubleshooting.

Academic Foundation

Education

B.S. in Computer Science & Engineering

University of California, Berkeley
2015-08 — 2019-05
Magna Cum Laude (GPA: 3.92/4.0)

Lead Chair of Systems & Networking Student Group; ACM ICPC Regional Finalist

Initiate Collaboration

Let's Build Something Resilient.

Available for staff-level architectural advisory, high-throughput systems consulting, and technical leadership engagements.

Location & AvailabilitySan Francisco, CA / Hybrid Remote
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