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Sam Spriggs

Sam Spriggs

Senior Software Engineer | System Architecture | Technical Leadership & Cultural Change

Colchester, UK
07445887321
English

Background


About

About

High-agency Senior Backend Engineer known for an 'owner's mindset' and a track record of leaving systems, processes, and teams significantly better than I found them. I bridge the gap between architectural vision and rapid implementation, using AI-augmented workflows to force-multiply team output. I specialize in untangling complex legacy systems, building culture-first engineering environments, and leading greenfield initiatives that unlock new business models.

Work Experience

Work Experience

  • Senior Kotlin Engineer, Pleo

    Jan, 2025 - Present

    Technical lead for high-stakes onboarding and KYC flows, including the flagship 'Embedded Partner' initiative; a new business model enabling us to onboard customers of large-scale corporate partners.

    • Architected the backend flow for the 'Embedded Partner' project, enabling a new business channel and driving seamless integration for enterprise partner clients.

    • Championed a culture of 'Engineering Excellence,' transforming siloed developers into a cohesive team through shared technical design and documentation initiatives that reduced PR latency by ~40%.

    • Scaled team velocity by integrating AI-augmented development into our SDLC: authoring high-fidelity technical specs to orchestrate AI-led implementation, ensuring rapid delivery without compromising code quality.

    • Architected a feature-flagging infrastructure (LaunchDarkly) that empowered the product team to run rapid-fire UX experiments, directly contributing to a 150% increase in onboarding conversion rates.

    • Implemented robust, event-driven pipelines (Kafka, BigQuery) to provide real-time visibility into the onboarding funnel for product stakeholders.

  • Software Developer, Yobota/Chetwood (Takeover)

    Jan, 2021 - Jan, 20254 years

    Core engineer focused on resilient microservices and long-term system maintainability in a high-compliance banking environment.

    • Took ownership of legacy system documentation and design, systematically identifying and mitigating 'bus-factor' risks and saving ~10 hours/sprint in support overhead.

    • Designed and built a high-throughput event-driven Email Notification System (60K+ req/day) and a serverless mortgage onboarding flow (10K+ req/day).

    • Pioneered a shift in CI/CD reliability by implementing automated linting (Mypy/Pylint) and parallelizing Jenkins flows, reducing functional test suite runtime by ~180%.

    • Established a 'better-than-I-found-it' culture by mentoring junior engineers and standardizing testing frameworks to reach 100% test coverage.

  • Full-Stack Software Developer, QuickRelease

    Jan, 2017 - Jan, 20214 years

    Key contributor to flagship licensed products, focused on performance optimization and scalable data architecture.

    • Resolved critical performance bottlenecks in datasets with 100M+ combinations, reducing analysis time from 24h to 20 minutes and delivering massive value to enterprise clients.

    • Optimized Django ORM and architecture, resulting in a 50% reduction in load times and a 4x improvement in memory efficiency.

    • Led sprint retrospectives and team planning, fostering an environment where cross-functional collaboration solved the hardest integration challenges.

  • Technical Consultant, CloudTrade Technologies

    Jan, 2016 - Jan, 20171 year

    Developed custom supplier templates and streamlined invoice automation workflows.

    • Implemented proprietary Prolog-based logic to automate complex data extraction, significantly improving processing accuracy.

Skills

Skills

  • Backend Engineering

    Kotlin

    Python

    Microservices

    API Design & Best Practices

    PostgreSQL

    DynamoDB

    Redis

  • Cloud Infrastructure

    AWS (Lambda, Step Functions)

    GCP

    Serverless

    SAM

    Terraform

    Event-Driven Architecture (Kafka)

  • AI & LLM Integration

    Prompt Engineering

    Model Context Protocol (MCP)

    Structured Outputs

    OpenAI

    Anthropic

    Gemini

  • DevOps & Tooling

    Docker

    GitHub Actions

    CI/CD Pipelines

    LaunchDarkly

    Heroku

  • Leadership & Strategy

    System Design

    Technical Mentorship

    Process Optimization

    AI-Augmented Development

Education

Education

  • Psychology, BSc, 2:1, University of Leicester

    Jan, 2012 - Jan, 2015

  • General Education, A-Levels & GCSEs, Westcliff High School for Boys

    Jan, 2005 - Jan, 2012

    A-Levels: Maths (A), Psychology (A), Physics (C), AS French (C)

    GCSEs: A*(4), A(4), B(3) including Maths, English & Science