BITSCORP · BARCELONA
Senior Full Stack + Data Engineer for startups that need it fixed, not staffed.
15+ years building backends, payment systems, and data platforms. Solo senior, hands-on — no staffing agency. Start with a fixed-price audit this week; keep us on if it's useful. We're looking for the next project for our team.
Starter packages
Fixed scope, fixed price, written report + merged fixes. If we continue, the audit fee counts toward the build.
Phoenix Production Health Check
Read-only review of your Elixir/Phoenix app: slow queries, missing indexes, N+1s, LiveView reconnects, deploy pipeline. Written report + 1–3 fixes merged.
What you get:
- ✓Postgres review (pghero-elixir)
- ✓Phoenix/LiveView review (N+1s, PubSub)
- ✓Deploy/ops health check
- ✓Written report (10–20 findings)
- ✓1–3 fixes merged as PRs
- ✓45-min walkthrough call
Data Pipeline Audit + 1 Fix
Map every source, job, and table. Find the top failure points. Ship one fix (idempotency, alerts). Architecture diagram + ranked backlog.
What you get:
- ✓Map sources, jobs, tables
- ✓Find duplicates, schema drift, PII exposure
- ✓Cost pass (largest queries)
- ✓One fix shipped (idempotent pipeline)
- ✓Architecture diagram
- ✓Ranked backlog with estimates
AI-Built App → Production
You shipped an MVP with Cursor/Claude. Now you have broken auth, no tests, secrets in the repo. We fix the top risks and get you production-ready.
What you get:
- ✓Security audit (auth, secrets, permissions)
- ✓Fix top risks (sessions, migrations, jobs)
- ✓CI + preview deploys
- ✓Error tracking & backups
- ✓README/runbook
- ✓Recorded walkthrough
Fixed scope, fixed price, written report + merged fixes. If we continue, the audit fee counts toward the build.
Capabilities
Engineering modules that ship
Interactive map of our production services — full-stack systems, mobile, AI agents, data pipelines, DevOps, and productized platforms.
Custom Software Development
MODULE: FULLSTACK · REACT
Expert custom software development services delivering scalable web applications, enterprise solutions, and ecommerce platforms using modern technologies like React, Next.js, and cloud-native architectures.
Mobile App Development
MODULE: MOBILE · 50+_SHIPS
Professional mobile app development for iOS and Android platforms. Cross-platform and native mobile applications with 50+ successful app launches on App Store and Google Play.
AI & LLM Development
MODULE: AI_LLM · INTEGRATIONS
Cutting-edge AI development services including custom LLM integration, intelligent automation systems, and AI agents that transform business operations and boost productivity.
AI Consulting
SKU: AI_CONSULTING · €2.5k+€750/mo
A RAG agent on your docs and tickets — not a scripted chatbot. Install €2,500 (paid up front), then €750/mo. Cancel after month 3. For SaaS, ecommerce, and online schools.
Install €2,500 + retain €750/mo
Full Stack Development
SKU: FULL_STACK · €12k
Four weeks to pull one hot path (websocket, lobby, payments) out of Python or Ruby into Elixir or Go. €12,000 at 50/50, or €3,000/mo with a three-month minimum. Poker engines and fintech gateways since 2009.
€12,000 / 4 weeks or €3,000/mo
App Launch
SKU: APP_LAUNCH · €1.5k
You have a build. We get it through App Store and Play review. Ship €1,500 (two slots a month), ASO month €750, rush €2,500. Your accounts — we are a user, not the owner. We do not build your app.
Ship €1,500 · ASO €750/mo · Rush €2,500
Data Engineering
SKU: DATA_ENGINEERING · €12k
One pipeline from your events to a warehouse you own, plus a dashboard of metrics you can defend. Four weeks: Airflow or Luigi into BigQuery or Postgres. €12,000 at 50/50, or €3,000/mo with a three-month minimum.
€12,000 / 4 weeks or €3,000/mo
DevOps
SKU: DEVOPS · €12k
CI, Kubernetes, rollback, and Prometheus for one product. Four weeks off laptop deploys. €12,000 at 50/50, or €3,000/mo with a three-month minimum. Your cloud account — we are a user, not the owner.
€12,000 / 4 weeks or €3,000/mo
Autonomous Project Localization (LocaleOps)
PRODUCT: LOCALEOPS · AUTOMATION
Full automation of your app translations. Our AI doesn't just translate text — it fixes UI bugs caused by string length changes and automatically creates Pull Requests in your repository. Supports GitHub, GitLab, Bitbucket.
€0.05/word or €200/mo per project
Built in public
Production-ready tools used by teams around the world. Available on GitHub.
devise_masquerade
Rails authentication extension for admin user impersonation. Used in production by hundreds of apps.
View on GitHub →phoenix_lens
Repository analytics dashboard and SQL notebook for Ecto. Query your production database with PII masking built in.
View on GitHub →Also: pghero-elixir, phoenix_healthy, redis_poolex
“Bitscorp really went above and beyond to deliver exactly what I was looking for.”
Client
Mobile app — Clutch review
“Bitscorp plays a critical role in helping the SaaS company scale projects and deliver new features on time. They lead a solid process thanks to their constant and clear communication and reactiveness. The flexible team provides value for cost work and strives to understand and help the client.”
Co-founder
Medical Software Company
“Bitscorp really went above and beyond to deliver exactly what I was looking for.”
Client
Mobile app — Clutch review
“Bitscorp plays a critical role in helping the SaaS company scale projects and deliver new features on time. They lead a solid process thanks to their constant and clear communication and reactiveness. The flexible team provides value for cost work and strives to understand and help the client.”
Co-founder
Medical Software Company
Selected work
Real products we engineered
A slice of shipped apps, tools, and AI infrastructure — no fabricated metrics.
Estate Monitor
Property listing dashboard with a multi-source crawler, AI post-processing, and a Telegram bot for new-home alerts.
LetsBooking
Stay search for travelers and AI agents — natural-language search, total-price ranking, SDKs, and MCP agent tooling.
Palm Reader AI
AI-powered palm reading app that analyzes hand lines using computer vision.
mcp-ffmpeg
Model Context Protocol server providing FFmpeg tooling for AI assistants.
PushUP Workout
Fitness tracker with goal-setting, activity analytics, and cross-platform delivery.
Catalan Verbs
Language learning app with 2000+ Catalan verbs and interactive conjugation practice.
Project scope
Build a scope estimate
Three steps to an indicative engineering range. Full feature-matrix calculator remains on /calculator.
- 1Type
- 2Complexity
- 3Contact
Frequently Asked Questions
Answers about custom software, mobile apps, AI/LLM integration, data, DevOps, timelines, pricing, and support
Bitscorp specializes in custom software development, including web applications with React and Next.js, mobile app development for iOS and Android, AI/LLM integration, data engineering and analytics, DevOps, ecommerce platforms, and enterprise solutions. We work with technologies like React, Next.js, Elixir, Golang, Ruby on Rails, React Native, Flutter, Unity, Airflow, BigQuery, and Kubernetes.
Development timelines vary based on project complexity and requirements. A typical MVP can take 8-12 weeks, while more complex enterprise solutions may take several months. We provide detailed project timelines after understanding your specific needs during our free consultation.
Yes, we develop mobile applications for both iOS and Android platforms. We offer both native development and cross-platform solutions using React Native and Flutter, depending on your project requirements and budget. With over 50 apps published, we have extensive experience in mobile app development.
AI/LLM (Large Language Model) integration involves implementing artificial intelligence and machine learning capabilities into your business applications. This can include chatbots, intelligent automation, data analysis, content generation, and custom AI agents. These solutions can improve efficiency, reduce costs, and provide better customer experiences.
Custom work is scoped per project — use the homepage estimator or /calculator. Named SKUs have locked prices: Full Stack Development, Data Engineering, and DevOps are €12,000 / 4 weeks or €3,000/mo; AI Consulting €2,500 + €750/mo; App Launch Ship €1,500 (ASO month €750, rush €2,500).
A capped publishing service. You have a working build; we get it onto the App Store and Google Play on your developer accounts. Ship is €1,500, two clients a month. We do not build the app and we do not guarantee review. See /services/app-launch.
A four-week extraction of one hot path — websocket, lobby, matching, or payments — from Python or Ruby into Elixir or Go. It is not a full rewrite. Details and a written SOW live on /services/full-stack-development.
A RAG agent on your knowledge base and tickets, not a scripted chatbot. Install is €2,500 paid to start; retain is €750/mo. It does not include LocaleOps. See /services/ai-consulting.
A four-week data engineering and analytics SKU: one named pipeline into BigQuery or Postgres, plus a dashboard of metrics you freeze in week 1. It is not a lakehouse programme or a data-science engagement. Details live on /services/data-engineering.
A four-week DevOps SKU: CI, Kubernetes, rollback, and Prometheus for one product. We do not become your SRE team and we do not own your cloud account. See /services/devops.
Yes, we offer comprehensive post-launch support and maintenance services. This includes bug fixes, security updates, performance optimization, feature enhancements, and technical support. We work with you to create a maintenance plan that fits your needs and ensures your application continues to perform optimally.
Next step