70%Faster Development
Intelligent Coding
AI-powered workflows reduce manual effort while maintaining enterprise-level code quality.
Custom software & product engineering
Elite engineers.
Lower hiring cost.
Build with a dedicated remote team of top-tier Bangladeshi engineers trusted to deliver speed, quality, and reliability across web, AI, and IoT products.
Senior-only teamTimezone overlapQuality-first delivery
Senior execution, transparent process, enterprise-grade quality
Scroll downto explore delivery
SaaSFintechHealthtechE-commerceAI & IoT productsSaaSFintechHealthtechE-commerceAI & IoT products
AI-Driven
Development
Excellence
We combine senior engineering with practical AI workflows to ship faster, test deeper, and scale products without compromising reliability.
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99.9%Defect-Free Releases
Bulletproof QA
Automation-assisted QA catches regressions early and keeps releases stable and predictable.
40%Higher Efficiency
Peak Performance
Smart optimization improves response time and system throughput under production load.
90%Faster Deployments
Zero-Downtime DevOps
AI-guided pipelines enable safer releases with lower operational risk.
10X Faster Delivery
Senior teams leveraging AI-assisted engineering to accelerate output while keeping quality high.
100% IP Protection
Top 1% Talent
Selected visuals from shipped work and how we operate—scroll to featured case cards for full context on our seven featured launches.
WarmChats — AI booking
Hospitality ops — mobile
OPAL — commerce
Immidox — services web
Expert marketplace
GodConnect — community
REBELLION — agency web
How we work with your team
Delivery & architecture
Discovery to launch
Stakeholder partnership
Build quality
Insights & scale
Swipe sideways — shorter cards, less scrolling
WarmChats — AI booking
Hospitality ops — mobile
OPAL — commerce
Immidox — services web
Expert marketplace
GodConnect — community
REBELLION — agency web
How we work with your team
Delivery & architecture
Discovery to launch
Stakeholder partnership
Build quality
Insights & scale
Why Bolt Fusion Tech
Clients come to us when delivery has to be predictable: clear requirements, honest estimates, and engineering judgment applied early—so you spend less time firefighting and more time growing the product. We work as an extension of your team, focused on outcomes users feel and metrics you can read.
Web & mobile appsAPIs & integrationsCloud & DevOpsProduct discoveryUI/UX engineeringQuality & launch readiness
MVP & greenfield buildsScope, architecture, and a shippable first versionTypical 8–16 weeks
Embedded product teamsRoadmap delivery with your PMs and stakeholdersOngoing
Stabilize & scalePerformance, reliability, and maintainability for live systemsAs needed
Your bench// who builds with you
Senior engineers.One delivery standard.
Each card opens in a new tab—so you can see who you would work with before you commit scope or budget.
0specialists
Featured client work
Seven shipped experiences—AI lead automation, operations, commerce, regulated services, marketplaces, community, and agency brands—each tuned to real users and conversion.
Swipe sideways for more — tap dots to jump
Web · AI Automation · Microservices
WarmChats — AI appointment booking
AI follow-up that's always first to respond: Claude qualifies and routes leads while GPT-4.1 handles instant auto-replies and books appointments—24/7, with every message tracked.
Mobile · React Native
Hospitality operations suite
Staff admin for dashboard, kitchen, procurement, POS, and orders—built for fast floor decisions.
Web · Next.js · Commerce
OPAL — Fashion × Tech
Luxury commerce experience with a cinematic hero, trust strip, and conversion-focused layout.
Web · CMS-ready
Immidox immigration services
High-trust services site with clear journeys, proof points, and strong primary calls to action.
Mobile · Marketplace
Expert marketplace & booking
Search, rich profiles, availability, and booking in one flow—trust signals like ratings and status built in.
Mobile · Community
GodConnect — faith community
Welcome journey, daily encouragement, and community connection—clear onboarding and a focused first-run experience.
Web · Agency / brand
REBELLION — brand agency
Statement hero, brutalist energy, and interactive work showcase—built to win bold creative briefs.
Case study · Systems architecture
Intelligent restaurant search
Conversational discovery with explicit routing, predictable AI unit economics, and latency targets suitable for high-volume production traffic.
Multi-tenant microservice · Tiered search · Observable by design
Executive summary
We delivered a multi-tenant restaurant discovery microservice that resolves natural-language queries (for example, “cozy Italian place for date night”) while keeping the majority of requests on a sub-100ms path. The architecture caps model spend at roughly $0.001 per AI-assisted query on average, combines Redis caching with deterministic lane selection, and ships with the metrics, logging, and guardrails operators expect in production.
System overviewProduction posture
Service commitments
Latency, cost, isolation, and operations
<100msSearch SLA
~80% of queries hit the fast lane
~$0.001Avg. cost / AI search
Budgeted hybrid retrieval
Multi-tenantPostgres RLS
Isolated rows per tenant
ObservableProduction-ready
Metrics, logs, safe limits
Three-lane search architecture
Each query is classified before any paid inference: deterministic paths carry the bulk of volume; models run only when phrasing requires interpretation; a short-TTL cache reduces repeat load on the database and providers.
1~80% of traffic · <80ms target
Keyword search
Simple intents, zero AI spend.
- Queries like “Italian”, “sushi”, “pizza”.
- PostgreSQL ILIKE plus PostGIS geo filters.
- Predictable path—no model calls.
$0 marginal cost per query
2~20% of traffic · <1200ms target
Natural language AI search
Complex intent → structured retrieval.
- Examples: “romantic spot with live music near me”.
- Claude Haiku parses intent to structured JSON.
- OpenAI embeddings + pgvector cosine similarity in Postgres.
~$0.001 per search (budgeted)
3Hot paths · <15ms target
Result cache
Repeat demand disappears at the edge.
- Redis with 30s TTL on hashed keys.
- Key = tenant + query + geo + filters + classification.
- Hit-rate goal 30–40% to protect DB and models.
Technical stack
Implementation stack
Backend
- NestJS 10
- TypeScript (strict)
- DDD + Hexagonal + CQRS
Data
- PostgreSQL 17
- PostGIS
- pgvector
- Row-level security (tenancy)
Cache & realtime
- Redis 7 — result cache (30s)
- Semantic intent cache (60s)
- LLM rate limits (100/min/tenant)
- Pulse: WebSocket + Redis pub/sub
AI services
- Claude Haiku 4.5 — intent parsing (~90% of AI calls)
- Claude Sonnet 4.6 — menu Q&A only
- OpenAI text-embedding-3-small (1536-d)
Bounded contexts
Partitioning for maintainable evolution
Five bounded contexts share a small kernel so search behavior can evolve without coupling unrelated concerns or destabilizing shared infrastructure.
Primary bounded context
Discovery
The search core
- Query classifier picks the lane.
- Intent parser (Claude) for NL queries.
- Search index in Postgres + hybrid ranker.
Engineering patterns
- Domain-Driven Design
- Hexagonal architecture
- CQRS
- Event-driven architecture
Tenancy
Configuration per brand
- Valid vibes, cuisines, ranker weights, embedding templates.
- In-memory registry with Redis warmup.
Indexing
Fresh vectors & listings
- Venue CRUD on the search index.
- Embedding saga on EntityIndexedEvent.
GoldenKeys
Smart filter chips
- Auto-generated chips like “Rooftop”, “Live music”.
- Cron every 6h from search analytics.
Pulse
Live venue status
- Open/busy/wait signals.
- Gateway on /pulse with WebSocket fan-out.
Shared kernel
- TenantId & Geo value objects
- Result<T, E> for explicit failures
- Prisma + Redis services
- TenantContext via AsyncLocalStorage
- Pino logging
- Claude & OpenAI adapters
How we work
Process
A straightforward process designed for busy product leaders: fewer surprises, clearer tradeoffs, and decisions you can explain to your board or budget owner.
Discovery & plan
We align on users, success metrics, constraints, and risks—then produce a concise technical approach and milestone plan so stakeholders know what “done” looks like and when to expect it.
1
Build in iterations
Working software every cycle: demos, backlog transparency, and early integration (auth, data, deployments) so issues surface when they are cheap to fix—not the week before launch.
2
Launch, measure, improve
Release with monitoring, runbooks, and a sensible cutover. After go-live we support stabilization, iterate on feedback, and help your team operate the product with confidence.
3
What we deliver
Services
Practical engineering aligned to your roadmap: you get transparent communication, measurable milestones, and software ready for real users—not a black box.
TypeScript & ReactNext.js & NodeMobile (iOS / Android)AWS & cloud-nativeAPI designAutomated testing
Custom product development
End-to-end web and mobile builds: discovery workshops, technical design, implementation, and handoff documentation—so your team owns the system with confidence after launch.
Platforms & integrations
Connect products to payments, CRMs, data pipelines, and internal tools with APIs and event-driven workflows that are observable, secure, and easy to extend.
Reliability & scale
Hardening for real traffic: performance tuning, monitoring and alerts, CI/CD, and operational runbooks—reducing downtime and making releases boring in the best way.
UX & frontend craft
Interfaces that match your brand and usability goals: accessible components, responsive layouts, and design-system thinking so new features stay consistent.
Technical discoverySprint deliveryCode reviewSecurity-minded defaultsDocumentationPost-launch supportTechnical discoverySprint deliveryCode reviewSecurity-minded defaultsDocumentationPost-launch supportTechnical discoverySprint deliveryCode reviewSecurity-minded defaultsDocumentationPost-launch supportTechnical discoverySprint deliveryCode reviewSecurity-minded defaultsDocumentationPost-launch support
Industry Focus
Industries We Power
with Innovation
We build focused digital products for teams that need reliable outcomes, measurable velocity, and software that scales after launch.
EdTech
LMS products, live class platforms, and assessment workflows built for scale and compliance.
Learn MoreFintech
Secure payment, lending, and risk systems with auditability and operational resilience.
Learn MoreE-Commerce
Fast storefronts, theme customization, checkout integrations, and CRO-focused UX.
Learn MorePharma
Regulatory-aligned healthcare software, portals, analytics, and clinical operations tools.
Learn MoreRetail
Omnichannel retail systems that connect inventory, customer journeys, and fulfillment.
Learn MoreSoftware/ITES
Custom business software and IT-enabled solutions for long-term product growth.
Learn MoreIs your industry here?
If not, we can still help you design and ship quickly with the same senior delivery standard.
Client outcomes
Testimonials
Feedback from leaders who needed delivery they could defend—to users, investors, and their own engineering teams.
“They turned a vague brief into a shipped MVP with sane tradeoffs explained along the way. Our team finally had a release cadence we could plan around.”
S
Sarah K.
CEO, B2B SaaS
“Strong engineering judgment on integrations and compliance-sensitive flows. We cut rework because they asked the right questions early.”
D
David Chen
Head of Product, Fintech
“Clear documentation and handoff after launch. Internal developers picked up the codebase without a weeks-long archaeology project.”
E
Emily Torres
CTO, Healthtech
FAQ
Questions? Answers.
Or grab an open slot below — same 30‑minute intro call.