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I’m a senior software engineer with 8+ years building end-to-end products across early-stage startups and large enterprise environments, and I currently work at Google in London. I’m comfortable owning loosely defined problems end-to-end, moving quickly inside small teams, and also collaborating in strict review cultures on larger codebases.…

LUIS H. AGUERA DOS REIS

Software Engineer, Full Stack Developer, Back-End Developer, +2

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I’m a senior software engineer with 8+ years building end-to-end products across early-stage startups and large enterprise environments, and I currently work at Google in London. I’m comfortable owning loosely defined problems end-to-end, moving quickly inside small teams, and also collaborating in strict review cultures on larger codebases.…

Available to hire

I’m a senior software engineer with 8+ years building end-to-end products across early-stage startups and large enterprise environments, and I currently work at Google in London. I’m comfortable owning loosely defined problems end-to-end, moving quickly inside small teams, and also collaborating in strict review cultures on larger codebases.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Beginner

Language

English

Fluent

Portuguese

Fluent

Spanish; Castilian

Intermediate

French

Beginner

Danish

Beginner

Italian

Beginner

Work Experience

AI-native document intelligence platform (E-signature) — Sole engineer (full-stack) at SealFlow, Kodyx Labs Ltd

February 1, 2026 - Present

Built an AI-native document intelligence product for the UK/EU market with eIDAS SES-compliant e-signature capabilities as an ingestion surface for downstream intelligence over contract corpora. As the sole engineer, developed the Next.js/React frontend and a Hono backend on Cloudflare Workers, using multi-tenant D1 storage, Vectorize for retrieval, and R2 for blob storage. Researched legaltech retrieval/extraction architectures (hybrid BM25 + vector retrieval, RAG vs graph RAG) and extraction schema design, informed by known LLM failure modes on long-form legal and commercial documents.

Software Engineer at Google

October 1, 2024 - Present

Delivered production features for large-scale RPC services within two months, ramping quickly on Google’s Java ecosystem and internal tooling. Partnered with Product and business stakeholders to translate ambiguous requirements into solutions spanning Angular/TypeScript frontend, Java gRPC backend, and SQL data layers. Worked daily with AI coding agents (Gemini and internal tooling) for code generation, refactoring, and test scaffolding, while keeping human review load-bearing through clear design documentation. Also participated in internal AI hack weeks, prototyping generative-AI features and contributing to product-improvement initiatives.

Software Engineer at EasyController

February 1, 2024 - May 31, 2024

Architected and shipped ELT pipelines connecting Redshift, Clickhouse, and DuckDB to enable near real-time analytics for business stakeholders. Built a browser-based client (React, Redux, TypeScript) for triggering and monitoring pipelines, reducing manual intervention by about 80%.

Data Annotator (LLM evaluation and data annotation) at Data Annotation Tech

November 1, 2023 - June 30, 2024

Evaluated LLM responses across code generation, reasoning, and instruction-following tasks. Gained hands-on exposure to model evaluation methodology and the failure-mode surface of frontier models.

Full-Stack Engineer at Seedata

July 1, 2021 - September 30, 2023

Led system architecture and data modelling from inception, including threat-intelligence ingestion pipelines processing 100K+ security events daily. Built the operator-facing console (React, TypeScript) used by security analysts to manage detections and review telemetry from ingestion pipelines. Implemented distributed tracing with New Relic to reduce MTTR and improve reliability across microservices. Managed cloud infrastructure with Terraform and containerized deployments on AWS (ECS Fargate, EC2), cutting infra costs and accelerating release cycles.

Software Engineer at Spirable

December 1, 2017 - July 31, 2020

Redesigned and rebuilt a browser-based video editor from scratch in Vue.js, improving UX and reducing rendering time by 40%. Owned the backend rendering pipeline (Python/Django services with RabbitMQ for job orchestration and PostgreSQL for state), driving headless-browser plus Canvas/SVG rendering at scale on AWS. Led a team of two engineers in collaboration with Product to ship the end-to-end video rendering platform.