# Efe Baran Durmaz **Software Engineer — Systems & Infrastructure** Ankara, Turkey · [efe@sardis.sh](mailto:efe@sardis.sh) · +90 532 689 7155 [github.com/EfeDurmaz16](https://github.com/EfeDurmaz16) · [linkedin.com/in/efe-baran-durmaz](https://linkedin.com/in/efe-baran-durmaz) · [sardis.sh](https://sardis.sh) > Selected proof: [29 merged PRs in solana-foundation/pay-kit](https://github.com/solana-foundation/pay-kit/pulls?q=is%3Apr+author%3AEfeDurmaz16+is%3Amerged) · live product at [sardis.sh](https://sardis.sh) PDF version: · Full machine-readable profile: --- ## Summary Software engineer building backend, infrastructure, SDKs, internal tools, and AI-native systems in Python, TypeScript, Rust, and Go. Strongest at turning ambiguous infrastructure problems into shipped APIs, developer tooling, integrations, and measurable performance improvements. --- ## Work Experience ### Sardis Labs, Inc. — Founder & Lead Engineer Dover, DE (Remote) · Oct 2025 – Present - Shipped non-custodial payment and control infrastructure on Base and Tempo mainnet, with 70,000+ SDK installs across npm and PyPI. - Built the policy engine, REST APIs, multi-language SDKs (Python, TypeScript, Rust), smart-contract flows, and a signed, append-only evidence ledger. - Integrated MCP, OpenAI Agents SDK, Vercel AI SDK, Coinbase AgentKit, and x402/MPP across agent and payment workflows, with a pre-execution authorization and approval layer. ### Solana Foundation — Core Contributor, Machine Payments Protocol (pay-kit) Open Source · May 2026 – Present - Merged 29 PRs into solana-foundation/pay-kit (the Foundation's Machine Payments Protocol SDK) plus 3 into solana-foundation/x402-sdk. - Authored client libraries in Go, Swift, Kotlin, Lua, PHP, Ruby, and Python (client, wire signing, interop adapter), and built a cross-language interop harness over a simulated network. ### Jotform — Backend Engineer Intern Ankara, Turkey · Jan 2026 – May 2026 - Built jot-logger (Go CLI/TUI) for production log inspection; adopted company-wide across engineering teams and reduced a 10–20 minute incident-debugging workflow to roughly 30 seconds. - Shipped a real-time coding interview platform (React + Monaco Editor, PHP/WebSocket) now used in Jotform's hiring process. ### Nokia — AI & Backend Engineer Intern Ankara, Turkey · Sep 2025 – Dec 2025 - Rewrote a stalled RAG indexing pipeline by instrumenting queue topology and splitting IO-bound vector-store calls from CPU-bound chunking into distinct Celery worker pools. - Replaced LangChain chunking with a custom Rust engine bound to Python through PyO3, delivering a 6× end-to-end speedup. - Indexed 300K documents in 3 weeks instead of the projected quarter and avoided a six-figure GPU spend; migrated storage to MinIO for stateless Kubernetes pods. ### Nokia — Network Engineer Intern Ankara, Turkey · Jul 2025 – Aug 2025 - Automated temperature anomaly monitoring across thousands of OLT/ONT devices, replacing manual checks with real-time alerting. - Refactored legacy scripts (Bash, Perl), cutting disk I/O via stream processing and removing hard-coded paths. --- ## Projects ### YULA OS — TypeScript, Next.js, Hono/Bun, Convex · 2025 – Present - Built an open-source autonomous AI agent with its own harness: a proactive callback loop (acts before being prompted), self-learning, and MCP tool use. - Wrapped each action in a deterministic control layer: classified by reversibility, signed, audit-logged, and gated for approval, undo, and replay. ### AgentGit (agit) — Rust, Python, TypeScript · 2026 – Present - Built an auditable, content-addressed version-control layer (diff, rollback, traceability) for automated workflows and state. - Rust core (SHA-256 DAG, Merkle JSON diff, AES-256-GCM) with PyO3 and napi-rs bindings exposing Python and TypeScript SDKs. ### Capsule — TypeScript, Provider Adapters · 2026 – Present - Built a domain-aware control-plane interface for sandboxes, jobs, services, edge functions, database branches, machines, and preview environments. - Modeled provider capabilities with explicit support levels, policy checks, and execution receipts; adapters across Docker, E2B, Modal, Cloud Run, Cloudflare, Vercel, Neon, Kubernetes, Lambda, and more. --- ## Skills - **Languages:** Python, TypeScript/JavaScript, Rust, Go, SQL, Bash. Also used: Solidity, PHP, Java, C++, SystemVerilog. - **Backend, APIs & Web:** REST and gRPC APIs, WebSocket, microservices, system design, distributed systems; FastAPI, Flask, Phoenix/Elixir, Node.js, React, Next.js, Tauri, Celery. - **Data & Infrastructure:** PostgreSQL, Redis, SQLite, Qdrant, vector database search, Docker, Kubernetes, AWS (S3, SQS), GCP Cloud Run, Vercel, Neon, MinIO, data pipelines, observability. - **ML & Agents:** machine learning, LLMs, RAG, embedding pipelines; LangChain, LangGraph, MCP, OpenAI Agents SDK, Anthropic, Gemini/Google ADK, Vercel AI SDK. - **Security & Identity:** authentication and authorization, IAM/identity, RBAC, encryption (Ed25519, AES-256), policy engines, audit logs, evidence chains. - **Tools:** Git, Linux, CI/CD (GitHub Actions), PyO3, napi-rs, Foundry, Pytest, Jest, Playwright. --- ## Education ### Bilkent University — B.Sc. Information Systems & Technologies Ankara, Turkey · Aug 2023 – May 2027 Full Merit Scholarship · 3.53 GPA · 3× High Honor · top 0.04% on the Turkish national university entrance exam.