We are seeking a high-caliber Senior/Lead Software Engineer to lead the development of our privacy-first, cross-platform AI Assistant. You will be responsible for building an architecture where all plaintext and training data remain strictly on-device, utilizing local runtimes (MLX, llama.cpp) and end-to-end encryption (E2EE). This role requires a rare blend of Flutter expertise, native systems programming, and applied cryptography.
responsibilities :
Local AI Integration: Implement and optimize local AI runtimes including llama.cpp (GGUF), MLX for Apple Silicon, and WebGPU/WASM for browsers.
Encrypted Indexing Pipeline: Build a high-performance, on-device indexing engine featuring text extraction (PDF/DOCX/OCR), chunking, and hybrid search (BM25 lexical + HNSW/IVF vector embeddings) .
Privacy & Cryptography: Develop the "SafeShare" capsule engine and verifiable execution receipts using Ed25519/ECDSA signatures and AES-GCM 256 encryption.
Native Systems & FFI: Create native plugins and FFI (Foreign Function Interface) layers to interface Flutter with OS-level secure storage like Keychain, Keystore, DPAPI, and TPM.
Verifiable Systems: Ensure every assistant execution produces a device-signed JSON receipt (COSE/JOSE) for auditability and transparency.
requirements-expected :
Flutter & Dart: Expert-level proficiency in Flutter for cross-platform UI development and native platform channel integration.
Local Model Expertise: Hands-on experience with on-device Small Language Models (SLMs) and audio/visual models like Whisper and PaddleOCR.
Applied Cryptography: Strong understanding of E2EE boundaries, HKDF key derivation, and hardware-backed key management (Secure Enclave/TPM).
Data Structures: Experience with CRDTs or Merkle trees for multi-device shard catalog reconciliation and sync.
Performance Optimization: Ability to manage background compute tasks (indexing during idle/charging) and optimize local RAG (Retrieval-Augmented Generation) loops.
Very good knowledge of English.
offered :
Attractive terms of cooperation, tailored to your skills and experience.
Work in an experienced and agile-driven team.
An interesting and forward-looking project.
A fast and friendly recruitment process.
The possibility of remote or hybrid work.
Air-conditioned office in Gliwice.
A great atmosphere and a close-knit team – integration events, games and competitions, shared sports challenges.
Employee benefits package: Luxmed and Multisport packages, Polsat Box Go access.
Development opportunities: participation in trainings, conferences, and knowledge sharing.
