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I’m a Full Stack Software Engineer with 20+ years of designing and delivering data-driven applications, APIs, and cloud-hosted platforms. Recently I architected and launched Pinloco end-to-end—a production React/Next.js PWA backed by PostgreSQL, REST APIs, webhook-driven automation pipelines, and Stripe payment integrations—designed, implemented, and operated entirely by me. I excel across the full stack, with particular strength in backend services, relational data modelling, API design, and workflow automation. I’ve delivered in agile, remote-first environments on complex, business-critical systems, and I’m comfortable owning the full delivery lifecycle from architecture to infrastructure operation and continuous improvement.…I’m a Full Stack Software Engineer with 20+ years of designing and delivering data-driven applications, APIs, and cloud-hosted platforms. Recently I architected and launched Pinloco end-to-end—a production React/Next.js PWA backed by PostgreSQL, REST APIs, webhook-driven automation pipelines, and Stripe payment integrations—designed, implemented, and operated entirely by me. I excel across the full stack, with particular strength in backend services, relational data modelling, API design, and workflow automation. I’ve delivered in agile, remote-first environments on complex, business-critical systems, and I’m comfortable owning the full delivery lifecycle from architecture to infrastructure operation and continuous improvement.

Sean Walker

Full Stack Developer, Web Developer, Back-End Developer, +2

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I’m a Full Stack Software Engineer with 20+ years of designing and delivering data-driven applications, APIs, and cloud-hosted platforms. Recently I architected and launched Pinloco end-to-end—a production React/Next.js PWA backed by PostgreSQL, REST APIs, webhook-driven automation pipelines, and Stripe payment integrations—designed, implemented, and operated entirely by me. I excel across the full stack, with particular strength in backend services, relational data modelling, API design, and workflow automation. I’ve delivered in agile, remote-first environments on complex, business-critical systems, and I’m comfortable owning the full delivery lifecycle from architecture to infrastructure operation and continuous improvement.…I’m a Full Stack Software Engineer with 20+ years of designing and delivering data-driven applications, APIs, and cloud-hosted platforms. Recently I architected and launched Pinloco end-to-end—a production React/Next.js PWA backed by PostgreSQL, REST APIs, webhook-driven automation pipelines, and Stripe payment integrations—designed, implemented, and operated entirely by me. I excel across the full stack, with particular strength in backend services, relational data modelling, API design, and workflow automation. I’ve delivered in agile, remote-first environments on complex, business-critical systems, and I’m comfortable owning the full delivery lifecycle from architecture to infrastructure operation and continuous improvement.

Available to hire

I’m a Full Stack Software Engineer with 20+ years of designing and delivering data-driven applications, APIs, and cloud-hosted platforms. Recently I architected and launched Pinloco end-to-end—a production React/Next.js PWA backed by PostgreSQL, REST APIs, webhook-driven automation pipelines, and Stripe payment integrations—designed, implemented, and operated entirely by me.

I excel across the full stack, with particular strength in backend services, relational data modelling, API design, and workflow automation. I’ve delivered in agile, remote-first environments on complex, business-critical systems, and I’m comfortable owning the full delivery lifecycle from architecture to infrastructure operation and continuous improvement.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Founder / Full Stack Software Engineer at Pinloco

July 1, 2025 - Present

Architected and built a full-stack hyperlocal CRM-style platform from scratch: React/Next.js PWA frontend, PostgreSQL/Supabase backend, and a multi-tier subscription system managing customer lifecycle and engagement data for 7,300+ businesses. Designed and implemented RESTful APIs and server-side data services with PostGIS spatial queries and RPC functions for fairness-based sponsor rotation. Built a webhook-driven automation layer integrating Stripe subscriptions, n8n workflow pipelines, and transactional emails — processing payment events, status changes, and onboarding flows without application-layer coupling. Engineered a scraping and data pipeline (ScrapingDog, OpenAI, n8n) to ingest, classify, enrich, and store 7,300+ business records across 55+ neighbourhoods. Delivered analytics dashboards and reporting views for business owners and platform admins, with engagement tracking, impression logging, and subscription metrics. Owned the full delivery lifecycle: architecture decision

Data & Tech Command Developer at Cumbria Constabulary HQ

July 1, 2024 - September 1, 2025

Migrated data warehousing onto Azure Synapse Analytics — building linked services, ingestion pipelines, transformation workflows, and Power BI reporting. Explored Microsoft Fabric and Lakehouse architectures to improve platform scalability and reporting capability.

Migration Analyst Developer at FNZ Group (Global Fintech)

February 1, 2022 - July 1, 2024

Delivered ETL data migration solutions for a global fintech platform, working with client SMEs to map, validate, and migrate business-critical customer account data in an agile environment. Built and maintained SQL Server pipelines where accuracy, traceability, and controlled delivery were essential — processing large financial datasets with zero tolerance for error.

Director at Letterbox Smart Ltd

December 1, 2015 - September 1, 2021

Founded and operated a distribution business with up to 20 staff, managing IT systems, operational processes, and commercial delivery to 100,000+ households monthly.

BI Data Specialist at Sellafield Ltd

January 1, 2014 - December 31, 2015

Delivered business intelligence and data solutions supporting critical operations at Sellafield through data analysis, reporting, and data quality initiatives.

Software Engineer at Capula Nuclear Ltd

January 1, 2011 - December 31, 2012

Developed software solutions for nuclear industry control systems, focusing on reliability, performance, and safety-compliant software engineering practices.

Operational Research Analyst at Sellafield Ltd

January 1, 2009 - December 31, 2014

Applied operational research methods to optimize processes, resource allocation, and project delivery in a high-stakes environment.

eCommerce Solutions Provider at Self-Employed

January 1, 2003 - December 31, 2009

Provided end-to-end eCommerce and software solutions for clients, including site development, integrations, and data workflows.

SQL Database Developer at Halliwell Landau / Weightman Vizards

January 1, 2000 - December 31, 2003

Designed and maintained SQL databases for clients, focusing on data integrity, performance, and reporting.