Bradley Leatherwood B.E.L

Senior Full Stack Developer

On-demand valet startup acquired by Volvo and rebuilt as the testbed for Volvo's consumer services in the run-up to the Polestar launch.

• Joined immediately after the acquisition as one of three backend engineers turning the Luxe car-movement engine into Volvo service infrastructure — re-architecting backend workflows so the startup's valet engine could power Volvo's consumer service flows, the service foundation for the Polestar launch.
• Led the SDK-first refactor (TypeScript AST codemods) that drew a clean API boundary between the backend and the five-person frontend team — unlocking parallel frontend development, eliminating duplicated code and cyclic dependencies, and introducing a Cap'n Proto / GraphQL–inspired pattern for bundling API calls.
• Built the localization workflow (GitHub Actions, Docker) used by the Luxe and Volvo On Call teams; advised European GDPR and Chinese data-compliance architecture.

Engineering Team Lead & Senior Full Stack Developer

Entertainment startup creating live talent-show products with celebrity judges such as Usher.

• Architected the microservice framework, self-documenting protobuf-inspired RPC tooling, and WebRTC-based sub-second event streaming that let live polls and chat games track the broadcast in real time — the show's engagement engine.
• Led a six-person engineering team across React Native apps, release workflows, and FFMPEG/CDN/Wowza video pipelines on AWS with Terraform, Docker, and Consul.
• Owned hiring — designed a methodology of phone screens, coding challenges, and team interviews, and grew the team by two engineers.
• Helped set up and produce the end-of-season live show streamed by Usher — including firefighting a last-minute streaming-vendor settings change as the broadcast went live.
• Led product development of a machine-learning social-media usage optimizer for brands and influencers — interviewed external stakeholders to identify market needs and opportunity size, collaborated on the business plan, and presented recommendations to senior management.

Lead Front-End Developer & Full Stack Developer

FinTech startup providing consent and customer-data management for banks and any company facing GDPR-era regulation.

• Architected TypeScript microservice APIs with ledger-based data models, generated clients and SDKs, JWT authentication, and enterprise partner integrations.
• Built a finite-state-machine tester proving complete state-transition coverage; owned cloud-security — managing a PKI and secrets with Vault and Keybase and setting the developer toolchain and best practices.
• Contributed to the product roadmap with a component-based workflow-composition UI that sidestepped rules-engine complexity entirely — ASN.1/PKCS#7 for security, multi-part messages for legacy compatibility and extensibility.

Manager, Sales Engineering

German mobile ad exchange with 80,000+ publishers and 500 demand-side partners.

• Built the team's log-search and analytics tools — shared searches and saved analysis scripts that let the six-to-eight-person sales-engineering team cut through exchange logs to spot failures and usage patterns across billions of daily impressions — making key queries 10x faster.
• Reported to the COO and Director of Global Sales Engineering; integrated demand-side platforms and ad networks into the exchange.

Consultant & Open-Source Author

Distributed systems, blockchain infrastructure, ad tech, and media consulting alongside full-time roles.

• Authored EIP-1080, among the first formal descriptions of recoverable tokens and wallets — engaging the Ethereum community and the Kleros arbitration network on game-theoretic griefing constraints; the ideas fed later research and product categories like social-recovery wallets (e.g., Argent).
• Led Horizon Games' scaling research and early prototypes — account-based Plasma, Tendermint-style consensus, a TypeScript/WebAssembly sidechain with a two-way Ethereum bridge — work that fed the core technology that became Sequence, the wallet platform now powering millions of onchain interactions.
• Consulted for Bitfinex/Ethfinex on market-making incentives — built the reference solution on the 0x protocol with token auctions and a fee-collecting ERC-20.
• Audited the designs that preceded Bitfinex's production Nectar token — eliminating reentrancy and overflow attacks, with simulation mocks to tune parameters against griefing and sybil attacks.
• Built Smaato's first self-service ad-tag creation flow (React/Node, designed end to end) so clients could configure tags for any SDK without sales-engineer help — plus malicious rich-media testing pipelines, OpenRTB bidder integrations, and VAST compliance automation.
• Migrated MSMCI's AWS infrastructure to a new account within 24 hours with zero app downtime, using Terraform, Consul, and Docker.

Founder

Independent game studio and publisher — the first founder story.

• Built a 3D game engine for Xbox 360 in C#/XNA — multithreaded physics, AI, rendering, and FPS mechanics — and released it open source.
• Developed latency-aware networking that scaled server-client communication with the visibility and proximity of players' avatars.
• Published games on the Xbox marketplace on behalf of other developers.