Custom software development
Bespoke platforms built around how your organisation actually works, not around a template.
- Discovery and technical scoping
- Domain-driven architecture
- Fortnightly releases
- Handover with full source and docs
Engineering studio · Dhaka
Software that ships, and keeps working.
We build large-scale mobile applications and full-stack web platforms — scoped, built, launched and run by the same small team of senior engineers.
3 weeks
To your first working release
Fortnightly
Release cadence, every project
100%
Source and IP handed to you
1 day
Reply to every enquiry
Build · Optimize · Deliver
Named engineers, start to finish
The people who scope your project are the people who write the code. No handover to a junior pool.
Working software every fortnight
A release you can open and use from week three, not a status report and a demo at the end.
Your code, your infrastructure
Full source, documentation and cloud accounts in your name from day one, handed over whenever you ask.
What we build
Discuss your projectOne engineering partner, end to end
Discovery through to production support. You get a named team, a public roadmap and a release every fortnight.
Mobile app development
Native and cross-platform apps for iOS and Android, shipped to both stores and maintained after.
- Flutter and React Native
- Native Swift and Kotlin
- Offline-first data sync
- Store submission and release management
Web platforms & portals
High-traffic public portals and internal tools that stay fast under real load.
- Server-rendered React and Next.js
- Accessibility to WCAG 2.2 AA
- Load-tested to peak concurrency
- SEO and Core Web Vitals
Enterprise systems & ERP
Finance, inventory, HR and procurement modules integrated into one system of record.
- ERP implementation and customisation
- Legacy data migration
- Role-based access and audit trails
- Reporting and BI dashboards
Cloud & DevOps
Infrastructure as code, CI/CD pipelines and observability so releases stop being events.
- AWS, Azure and on-premise
- Kubernetes and containerisation
- Automated pipelines and rollback
- Monitoring, alerting and on-call
AI & data engineering
Document processing, forecasting and search built on your own data, with the accuracy measured.
- OCR and document extraction
- LLM integration and RAG search
- Data pipelines and warehousing
- Model evaluation and monitoring
UI/UX design
Research, prototypes and a design system your engineers can build from directly.
- User research and journey mapping
- Interactive prototypes
- Design systems and component libraries
- Usability testing
QA & security testing
Automated regression suites and penetration testing before anything reaches production.
- Automated end-to-end suites
- Performance and load testing
- OWASP Top 10 assessment
- Penetration test reports
Dedicated teams
Engineers who work as part of your team, in your timezone, on your board.
- Named engineers, no rotation
- Overlapping working hours
- Your tooling and process
- Monthly capacity, not fixed scope
Where our experience sits
Talk to an engineerLarge-scale mobile and full-stack web
ZeroLag IT is a new studio, so we will not show you a portfolio of other people’s logos. What we can tell you is exactly what our engineers have built before, and the ground we are set up to cover.
Large-scale mobile applications
Consumer apps built to hold real load: hundreds of thousands of installs, patchy networks, and a release process that survives store review.
Flutter and React NativeNative Swift and KotlinOffline-first syncPush and deep links at volumePhased store rolloutCrash and performance monitoring
Full-stack web development
One team from database to pixel — typed end to end, server-rendered where it matters, and fast on the connections your users actually have.
TypeScript across the stackNext.js and ReactNode.js, NestJS and DjangoPostgreSQL data modellingWCAG 2.2 AA accessibilityCore Web Vitals budgets
APIs, integrations and backends
The layer everything else depends on: clean service boundaries, third-party integrations that fail safely, and permissions you can audit.
REST and GraphQL APIsEvent-driven servicesPayment gateway integrationRole-based access and audit trailsLegacy system integrationData migration
Cloud, delivery and reliability
Infrastructure as code and pipelines from the first commit, so releasing is routine and a rollback is a button rather than an incident.
AWS and AzureDocker and KubernetesCI/CD with automated rollbackLoad and soak testingMonitoring and alertingPost-launch support
Ask us on the first call and we will walk you through architecture decisions and code from work we have shipped, as far as our confidentiality agreements allow.
Where we work
Sectors we build for
The domains our engineers have worked in and the ones we are equipped to take on. If yours is not here, tell us on the first call and we will say honestly whether we are the right fit.
Government & public sector
Citizen portals, records digitisation and inter-agency integration at national scale.
Banking & fintech
Core-adjacent platforms, mobile banking, payments and trade finance automation.
Healthcare
Patient records, telemedicine, diagnostics workflow and clinic operations.
Logistics & mobility
Fleet telemetry, route optimisation, warehouse systems and last-mile tracking.
Manufacturing
ERP, production planning, quality systems and plant-floor integration.
Retail & e-commerce
Marketplaces, inventory and checkout systems built to survive a festival peak.
Education
Learning platforms, assessment, proctoring and student information systems.
Telecom
Subscriber self-service, billing integration and network operations tooling.
Who we are
An engineering studio, not an agency
ZeroLag IT is a new studio, started by engineers who spent their careers building large-scale mobile applications and full-stack web platforms inside other people's companies. The name is the promise: no lag between a problem being understood and it being fixed.
- Named engineers, no rotation mid-project
- A working release every fortnight from week three
- Full source, documentation and infrastructure in your name
- Fixed team and rate, capacity-based rather than fixed-scope
Mobile
iOS and Android, built for scale
Web
Full-stack platforms and portals
Cloud
AWS, Azure and Kubernetes
Support
We stay on after launch
How we build it
The stack behind the work
Chosen per project, not per fashion. These are the tools we build with day to day, and the ones we will argue for or against on your first call.
Frontend
TypeScriptReactNext.jsFlutterReact NativeTailwind
Backend
Node.jsNestJSGoJava Spring.NETPythonDjango
Data
PostgreSQLSQL ServerMongoDBRedisElasticsearchKafka
Cloud & platform
AWSAzureKubernetesDockerTerraformGitHub Actions
AI & analytics
PyTorchLangChainOpenAIPower BIMetabaseTimescaleDB
How we work
From first call to production in weeks
No discovery phase that bills for three months and produces a slide deck. You see running software in the third week.
1
Scope
A week of workshops that ends with a written technical scope, a fixed team and a first-release date you can hold us to.
2
Design
Interactive prototypes and a design system before a line of production code, tested with your actual users.
3
Build
Fortnightly releases into a staging environment you can use, with a demo at the end of every sprint.
4
Launch
Load-tested, penetration-tested and rolled out in cohorts, with rollback rehearsed before it is ever needed.
5
Run
Monitoring, on-call and a quarterly roadmap. Or a clean handover with full source and documentation.
Get in touch
Send an enquiryWhere to find us
An engineer replies within one working day. No qualification script, no call centre.
Sunday to Thursday, 09:00–18:00 (GMT+6)
Tell us what you are trying to build
A 45-minute call with the engineers who would do the work, not a salesperson. You leave with a rough scope and an honest view on whether we are the right fit.