Custom web apps, mobile apps and AI, shipped in weeks.
Neltar is a custom software development company for teams that need production systems, not prototypes. We build full-stack web applications, iOS and Android apps, and the AI that runs inside them, pairing AI speed with senior engineering judgment, from first sprint to production in 2–8 weeks.
Custom web application development, full stack
One senior team for the whole stack: interface, back end, database, integrations and the cloud it runs on.
Custom software is worth building when the work is specific to how your business runs, and the off-the-shelf tools you've tried keep pushing your team back to spreadsheets and workarounds. We design and build full-stack web applications around those workflows: the interface your team or customers use, the back end and APIs behind it, the database, the integrations with the systems you already run, and the cloud infrastructure it's deployed on.
Because one team owns the whole stack, there are no handoffs between a front-end shop, a back-end contractor and someone else's DevOps. AI handles the repetitive mass of the codebase, including scaffolding, schema, test suites and integration glue, while senior engineers design the architecture, review every change, and make the calls that decide whether the system still holds up a year from now. Most teams see working software within one to two weeks, and a first production release in 2–8 weeks.
- FRONT END
- Fast, accessible interfaces for every screen size, built on a design system so new features stay consistent.
- BACK END & APIS
- Business logic, permissions and APIs shaped around how your data actually flows, ready for a mobile app or partner integration later.
- DATABASE
- A data model built around your real records, with migrations, backups and reporting designed in from day one.
- INTEGRATIONS
- Connections to your ERP, CRM, payments, identity provider and the other systems the work depends on.
- CLOUD & DEVOPS
- Deployed into your own cloud account, with CI/CD, monitoring and separate environments you control.
- Internal platforms and operations tools that replace spreadsheets and manual chasing
- Customer and partner portals with accounts, roles and self-service
- SaaS products and MVPs, taken from prototype to production
- Progressive web apps that work on any device, including on poor connections
- Dashboards and reporting on live operational data
- APIs and integrations between systems that don't talk to each other
Already have a stack? We build in yours.
Mobile app development for iOS and Android
Apps your customers and field teams rely on every day, on the same back end as your web platform.
A mobile app is only as good as the systems behind it. We build iOS and Android apps on the same back end and APIs as your web application, so data, permissions and business rules stay consistent everywhere, and you aren't paying to build the same logic twice.
We design for the conditions your users are actually in: patchy connectivity on site, approvals squeezed in between meetings, customers who leave the moment a screen feels slow. Then we handle the parts that usually slip: authentication, secure storage on the device, release pipelines and app store review.
One codebase ships to both the App Store and Google Play, shares logic with your web app, and is quicker to update. Right for customer apps, internal tools, field apps and MVPs.
Fully native iOS and Android builds for deep hardware access, heavy graphics, wearables or platform-specific features, where the extra cost buys something real.
- Customer-facing apps with accounts, notifications and self-service
- Field and workforce apps that keep working offline and sync when back online
- Approval and operations apps connected to your ERP or CRM
- Mobile companions to your web platform, sharing one back end
- AI features on mobile: document capture, assistants and smart triage
- App Store and Google Play release, monitoring and ongoing updates
AI agent development and AI integration
AI inside the software your team already uses, with agents that do the legwork, then hand a person a decision they can make in seconds.
Most AI projects stall in the same place: the demo works, then it meets your real data and your exceptions. We build AI features and agents that connect directly to the systems where your work lives, including your web platform, ERP, CRM, ticketing, documents and inboxes, so the AI sees the full picture instead of a copy-pasted slice of it.
Then we design around the moment that matters most: a person reviewing the output. We build the approval screen before we write the agent, track how often reviewers override it, and widen automation one case type at a time, only once the numbers show it's ready.
- AI features inside your web and mobile apps: search, summaries, drafting and assistants
- AI agents that run multi-step workflows end to end, with a person approving anything that carries risk
- LLM integration into the software your team already uses, instead of yet another tool to log into
- Knowledge assistants and retrieval grounded in your own documents and data
- Document processing (classification, extraction and drafting), with every claim linked to its source
- Evaluation harnesses and monitoring, so accuracy and override rates stay visible over time
Hiring full-stack developers or freelancers? Compare a senior team.
The people who scope your project are the people who build it.
When you need software built, the usual routes are recruiting software engineers in-house, hiring freelance developers through a marketplace, or bringing in a team. Each fits a different situation. Freelancers suit small, clearly defined tasks. In-house hires make sense for long-term product ownership. A senior team fits when the work spans several disciplines, carries real business risk, and needs to be in production soon.
Neltar gives you that team without a recruiting cycle: senior engineers across full-stack web, mobile, AI and DevOps, working in fixed-scope sprints with no junior bench and no account layer in between. When the build is done, we hand over clean, documented code or stay on for the next iteration.
- Senior engineers only. The people on the first call do the work
- Full-stack web, mobile, AI and DevOps in one team
- Every change reviewed before it ships
- A fixed scope and fixed price, agreed before the build starts
- Code, documentation and infrastructure that are yours from day one
| Compare | FREELANCE MARKETPLACE | IN-HOUSE HIRE | NELTAR |
|---|---|---|---|
| TIME TO START | Days, once you've vetted candidates | Often months of recruiting | Scoped and planned in days 1–3 |
| SKILLS COVERED | Usually one or two specialties | Grows with headcount | Full-stack web, mobile, AI and DevOps |
| CODE REVIEW & QA | Mostly self-reviewed | Depends on team size | Every change reviewed by a senior engineer |
| IF SOMEONE LEAVES | Work stops until you find a replacement | Recruit and onboard again | Team-backed, documented as we go |
| PRICING | Hourly, open-ended | Salaries, benefits and recruiting costs | Fixed scope, fixed price |
| CODE & IP | Depends on the contract | Yours | Yours from day one |
Need one small, well-defined task done? A good freelancer may be the better fit, and we'll tell you that on the first call.
What to ask any software development company, with our answers.
Most software projects that go wrong were visible in the sales process. These are the questions worth putting to any custom software partner, including us.
Who will actually build it?
The senior engineers you meet on the first call. There's no junior bench and no handoff to a team you haven't met.
Who owns the code, accounts and data?
You do, from day one. The repository, cloud accounts and credentials sit in your name, not ours.
Do you scope before you quote?
Always. Days 1–3 are scoping: goals, constraints and success metrics. You sign off the plan and the fixed price before any build starts.
When will we see working software?
Usually within the first one to two weeks, and every change after that is reviewed by a senior engineer before it ships.
How do you actually use AI?
For speed on the repetitive work: scaffolding, tests and integration code. Never as a replacement for architecture, review or judgment.
What happens after launch?
You get documentation and a runbook written during the build. We hand off cleanly, or stay on for the next iteration.
The workflow, data and platform work that holds it all together.
Workflow systems
Internal tools that remove manual coordination, chasing and copy-paste between systems, so your team spends its time on the judgment calls instead.
Data & ML platforms
Pipelines, models and dashboards that turn scattered data into decisions. We agree on one source of truth first, because most retrieval and AI failures turn out to be data problems, not model problems.
Platform & DevOps
Cloud infrastructure, CI/CD and observability built to scale safely, deployed into your own cloud account so you keep control of access, networking and data.
Built for teams running complex operations.
Every engagement starts with the same question: where does the work actually leak time? Here's what changed when we answered it.
Questions, answered.
Not sure which service you need?
Book a 30-minute call. We'll map your workflows and tell you honestly whether a custom web app, a mobile app or AI is the right answer.
BOOK A STRATEGY CALL →