We’ve seen the monsters in your software
a flamethrower
We guide ambitious companies like yours through every stormy phase of custom software development.
Sanddev is a custom software development company in Wrocław, Poland, working since 2016. We build and rescue production systems for AdTech, MarTech, manufacturing, semiconductors and research institutions: ad servers and bidders, data and consent platforms, applied AI, and the integrations underneath them. A typical crew is three to six senior engineers - no juniors practising on your platform. Rescue and custom development are quoted per engagement: a rescue starts with a fixed-price production-readiness audit, a new build with a paid scoping phase.
🌎 Industry experience.
None of them learned on your budget.
Decades of it, and not the kind you get from reading a case study. Our founders came out of Nokia, Tieto and Microsoft; since then we’ve shipped into shop floors, trading desks, fabs, ad exchanges and public registries. Different acronyms, same job – get it into production without breaking the thing that pays for it.
- AdTech
- MarTech
- Manufacturing and production
- Semiconductors and high-precision industry
- Finance and banking
- Public sector and government
- IT and research institutions
- EdTech and training
- Software companies and agencies
What a custom software development company actually does
🔎 Production-Readiness Audits
For: founders weeks from launch, CTOs inheriting a platform, investors running due diligence.
A fixed-price review of your repository at one named commit. Severity-rated findings cited to file and line, a ten-dimension readiness scorecard, engineering maturity counted from the code, and a costed fix plan with hours and a price. From €890. Audits also cover NIS2, the Cyber Resilience Act and Poland’s amended KSC Act: every finding is mapped to the requirement it affects.
Our test repo hides four decoy vulnerabilities that aren’t real – a good audit must not report them.
⌛ Software Rescue & Vendor Handover
For: companies whose agency went quiet, teams on their second vendor, undocumented systems.
We take over code we didn't write. Map what's there, separate what ships this quarter from what needs rebuilding, price stage one, and finish it, in your repo and your CI, next to your engineers rather than instead of them. No rewrite unless the arithmetic says so.
If the last handover was a zip file and a Slack channel that went quiet, start here.
🪐 Advisory & Integration
For: CTOs, heads of IT, CFOs, and teams whose systems have quietly stopped talking to each other.
Architecture reviews, cloud spend analysis, build-versus-buy and vendor selection - then the API, ERP and middleware integration work the recommendation calls for. No partner tiers, no reselling, no commission from anyone we might recommend.
Most advisory ends in a slide deck. Ours ends with the first integration merged.
🧑🎨 Custom Software Development
For: product companies outgrowing off-the-shelf, operations teams whose process fits no SaaS.
Internal platforms, operator tools, data pipelines, and the APIs between systems that were never meant to meet. A senior crew of three to six, no juniors billed as seniors, working in your repository. Merged pull requests you can read, not a handover zip.
Quoted nine months for something that sounds like six weeks?
🦾 Applied AI & Data
For: teams whose AI pilot never left the demo, companies sitting on data they can't query.
Retrieval on your own data, with evaluations and tracing rather than prompts and optimism. The pipelines and warehouses that make data answerable first. Multi-vendor by default: OpenAI, Anthropic, Mistral, and open-weight models that run on your hardware.
We don't do "AI strategy." We do AI engineering.
Custom software development, end to end
Speed, proof, and knowing when to say no
Milliseconds decide the impression. A missing consent record decides whether you keep the data. A ledger either beats a database or it's an expensive one - we'll tell you which. And we know why that API keeps ghosting you at midnight.
Tell us what you need. We'll tell you what you actually need.
Real-time bidding and inference within ~100ms
Personalized ad delivery
Ad revenue optimization
Multi-platform integration
Audience segmentation
Predictive analytics
Anomaly detection
Fraud detection
Privacy compliance
Decentralized ledger of ad events
Self-executing smart contracts
Supply-chain auditing systems
Tokenized ad ecosystem
And whatever your next brilliant idea dreams up
Curious for a little more?
Custom software development, zero cookie-cutter nonsense
LLM integration and AI agents - and blockchain when it earns its place
Built for the enterprise battlefield
Software rescue for half-built platforms - fixers, not just builders
When the platform is old and the team is stretched. The hell of frustrations™
Unlock your backlog
and finally get the thing built
Tech Stack? We’ve got it
(and the swagger)
TypeScript, Python, Go and Rust on the back end. React and Next.js on the
front. Kafka, ClickHouse, Snowflake and dbt in the data layer. OpenRTB,
Prebid and VAST in the ad stack, with TCF 2.2 and Consent Mode v2 wired in
from the first sprint rather than retrofitted before an audit. LLM work on
OpenAI, Anthropic, Mistral and Bielik — with RAG, pgvector and evals, not
just prompts. AWS, Google Cloud and Azure.
See the full stack
Let’s get you a system your team wants to use
to give your stack a glow-up