Mereltech delivered work that consistently outperformed our expectations. Calm under pressure, fast on the keyboard, and obsessive about quality.
Rob Balderstone
Head of Product, WNTD · London
Booking new engagements for Q3 2026
We engineer the products
others promise.
Mereltech is a senior product studio. We build mobile apps, web platforms, backends and brand systems for founders and teams who can't afford to ship slow, fragile, or generic.
London → Sarajevo
Remote-first, EU/UK hours
Senior-only team
Engineers, designers, QA, SEO
Flutter · Swift · Kotlin
Cross-platform & native iOS / Android
From idea → scale
Discovery, build, ship, iterate
WNTD · London
ApiniLabs · Basel
Lilium
Gradilac
Fijaker
Coachly
Monri Payments
RevenueCat
WNTD · London
ApiniLabs · Basel
Lilium
Gradilac
Fijaker
Coachly
Monri Payments
RevenueCat
Partnerships & certifications
Credentials we hold across cloud, mobile and infra
Google Cloud Partner
Architecture, Firebase, Vertex AI
AWS Certified
Solutions architect on the team
Apple Developer Program
iOS publishing & enterprise
Google Play Developer
Android distribution at scale
/ 01 · Services
Eight disciplines, one studio, one accountable team.
You don't hand off between three agencies. We sit in the same standup with engineering, design, QA and growth, and own the outcome end to end.
Mobile apps
Cross-platform Flutter is our home turf, and we ship native iOS (Swift / SwiftUI) and native Android (Kotlin / Jetpack Compose) too. We pick the right tool for your product, not the one we're selling.
FlutterSwiftKotlinReact Native
Web platforms
Marketing sites, dashboards and SaaS frontends in Next.js. Fast on a 3G connection, accessible by default, and a joy for your team to extend.
Next.jsReactTailwindVercel
Backends & APIs
Node.js, Firebase, Supabase, GCP and AWS. From a clean REST surface to event-driven systems with queues, workers, and observability built in.
NodePostgresGCPAWS
Product design
Interface, motion, and brand systems that look bespoke, not template. Figma-first, design tokens, dark/light, and pixel-tight handoff.
FigmaTokensMotionBrand
Solution architecture
Pre-build de-risking. We map your domain, pick the right tools, and write the spec your future engineers will actually thank you for.
DiscoveryADRsRoadmaps
QA & reliability
Manual + automated testing, CI gates, release trains, crash triage. We treat quality like product, not paperwork.
CodemagicPlaywrightCI/CD
SEO & growth
Technical SEO, schema, Core Web Vitals, content scaffolding. The boring fundamentals that compound into traffic.
SchemaCWVContent
AI features
LLM integrations, embeddings, vision, voice. Practical AI that ships, not demoware. Costed, evaluated, and observable.
OpenAIClaudeRAG
/ 02 · Selected work
Real apps. Real users. Numbers we can show you.
Bosnia & Herzegovina · Studio build · Mobile, backend, design
Gradilac
A construction marketplace connecting clients with verified contractors. We delivered the full stack (listings, bids, in-app chat, and a reputation system) alongside a brand identity built to scale across the region.
6
weeks to MVP
4.8★
store rating
12k+
early users
FlutterFirestoreCloud FunctionsStripe
Bosnia & Herzegovina · Studio build · Mobile & realtime backend
Fijaker
A local services & ride-sharing app for the Balkans. We engineered real-time driver matching, in-app payments, multi-language localisation, and offline-first ride history, all shipped end-to-end by our team.
<300ms
p50 match latency
3
languages from day one
A+
Lighthouse CWV
FlutterNode.jsPostgresWebSockets
Coaching platform · Studio build · Web app, payments, video
Coachly
A coaching SaaS with structured programs, video sessions, payments, and progress tracking. We designed the brand and product, engineered the platform, and tightened the feedback loop between coach and athlete to a one-tap experience.
+25%
coach retention
1-tap
session booking
GDPR
ready
Next.jsSupabaseStripeDaily.co
12+
Apps shipped to App Store & Google Play
5+
Years compounding production experience
99.5%
Median crash-free sessions across our apps
4
Markets we deliver to (UK, EU, US, Asia)
/ 03 · How we work
A senior process, without the agency theatre.
No 40-slide kickoff decks. No status meetings about status meetings. We build in tight loops with the people who will use the thing.
- 01Discover
A focused 1-2 week sprint. We map your domain, users, and risks, then write a build plan you could hand to anyone.
- 02Design
Brand, UX and motion in one loop. Tight, opinionated, prototyped in real interfaces, not Figma fictions.
- 03Build
Senior engineers, weekly demos, observable from day one. CI/CD, env parity, and code your team can extend.
- 04Ship
Phased rollout, store reviews, feature flags, real telemetry. We treat launch as the start, not the finish line.
- 05Scale
Performance, retention, growth experiments. Stay on as your fractional team or hand off cleanly when you hire.
/ 04 · Stack
We pick boring tech on purpose, and use it brilliantly.
Tools we've shipped to production for years. No framework-of-the-week. No surprise rewrites in 18 months.
Mobile
- Flutter & Dart
- Swift / SwiftUI
- Kotlin / Jetpack Compose
- React Native
- Codemagic & Fastlane
Web & Frontend
- Next.js
- React
- TypeScript
- Tailwind CSS
- Framer Motion
- Vercel
Backend
- Node.js
- TypeScript
- Python
- Postgres
- Redis
- GraphQL & REST
Cloud & Data
- AWS
- Google Cloud (GCP)
- Firebase
- Supabase
- Cloudflare
- BigQuery
Design & Product
- Figma
- FigJam
- Framer
- Adobe CC
- Notion
- Design tokens
Delivery & Ops
- Jira
- Linear
- GitHub & GitLab
- Slack
- Sentry & Crashlytics
- PostHog & Mixpanel
Payments
- Stripe
- RevenueCat
- Apple Pay & Google Pay
- Monri
- PayPal
- Adyen
AI & Search
- OpenAI
- Anthropic Claude
- Vertex AI
- Pinecone & pgvector
- Algolia
- Meilisearch
/ 05 · Words from people we've built with
The work speaks first. They speak second.
Rare combination of senior engineering judgement and the ability to actually ship. Our roadmap moved faster the moment they joined.
Edin Halilovic
CEO, Lilium
They treated our app like it was their own product. Performance, reliability, and the small UX details all just got better month over month.
Engineering lead
ApiniLabs AG · Basel
/ 06 · Journal
Notes from the build.
/ 07 · Let's build
Got a product
that deserves a senior team?
Tell us where you're stuck: kicking off, scaling, rescuing a build, or hiring. We'll reply within one working day with a real human and a real plan.
Emailhello@mereltech.com
Response timeWithin 1 working day
StudioSarajevo · Remote-first
EntityMereltech OÜ · Tallinn, EE