Software Engineer Senior

LUKASZ KRZYSZTOF KUSMIERZ

Software Engineer & AI Specialist

+447********* ********.****@*****.*** Swinton, Manchester, United Kingdom SUMMARY

Innovative and performance-driven Senior Software Engineer with over 9 years of experience in full-stack development, software architecture, and cloud-native engineering. Expert in designing scalable microservices, optimizing system performance, and leading cross- functional teams through the full SDLC.

Proficient in backend and frontend technologies, DevOps practices, and distributed cloud architectures (AWS, Azure). Proven track record of delivering secure, high-performance solutions for enterprise clients across fintech, HR, and industrial automation sectors. Adept in Agile, CI/CD, and test-driven development, with a strong commitment to mentorship and engineering excellence. EXPERIENCE

Full-Stack & AI Engineer

Palantir Technologies

04/2023 - Present London, United Kingdom

Engineered and deployed a scalable, multilingual AI chatbot platform leveraging GPT-4o, GPT-5, Claude 3.5 Sonnet, and LLaMA 3.1, delivering context-aware, human-like interactions across 175+ languages, expanding product accessibility worldwide. Designed and automated a robust training pipeline to process and embed diverse data sources (web content, PDFs, structured documents), enabling high-precision and domain-tailored responses for enterprise clients. Developed a no-code chatbot builder using React.js and Tailwind CSS, providing an intuitive drag-and-drop interface that empowered non-technical teams to create and deploy custom bots, reducing implementation time by 60%. Built and maintained scalable backend services in Node.js and Express, creating secure RESTful APIs for conversation orchestration, lead capture, and third-party integrations.

Integrated CRM and marketing ecosystems (HubSpot, Pipedrive, Zoho, Zapier) to automate workflows and streamline lead management, improving conversion tracking and operational efficiency by 40%. Delivered real-time analytics dashboards to track user engagement, chatbot performance, and conversion metrics, enabling stakeholders to make data-driven business decisions.

Orchestrated cloud deployments on AWS (EC2, S3, RDS) with Docker and Kubernetes, achieving 99.9% uptime and ensuring enterprise- grade scalability, security, and fault tolerance.

Participated in Agile planning, backlog grooming, and sprint retrospectives, helping the team improve delivery cadence and technical communication.

Senior Frontend/React Developer

Humana

07/2021 - 02/2023 Louisville, Kentucky, United States Worked on to optimize the website pages using SEO techniques to make the pages to be maximum optimized and making sure there are no bad URL’s.

Built reusable component libraries and UI frameworks, standardizing design systems across projects and reducing development time by 35%.

Collaborated with cross-functional teams (designers, backend engineers, and product managers) to deliver seamless user experiences aligned with business objectives.

Integrated RESTful and GraphQL APIs for real-time data rendering, enhancing application interactivity and improving customer engagement.

Mentored junior developers, conducting code reviews, pair programming sessions, and best practices workshops, elevating overall team productivity and code quality.

Implemented automated testing (Jest, React Testing Library, Cypress) to ensure product reliability and reduce post-release bugs by 25%. Full Stack Software Engineer

ScienceSoft

12/2019 - 06/2021 McKinney, Texas, United States

Spearheaded the design and development of a high-throughput talent analytics platform using Java 17, Spring Boot 3, Kafka Streams, AWS Lambda, and DynamoDB, enabling real-time insights for enterprise clients. Built a fully containerized microservices ecosystem deployed via AWS ECS Fargate and orchestrated using Terraform, Docker, and GitHub Actions CI/CD pipelines, improving deployment frequency by 60%. Integrated Open Telemetry, Prometheus, and Grafana for observability across 15+ microservices, achieving sub-second latency detection and improving incident resolution time by 45%. Led frontend development with React.js, Redux Toolkit, and Tailwind CSS, building modular, A11Y-compliant UI components served through an NX monorepo architecture.

Established a robust contract-testing pipeline using Pact and REST Assured to support independent service deployment and prevent breaking changes in a decoupled architecture.

Implemented domain-driven design (DDD) and event-sourcing patterns using Axon Framework and PostgreSQL to ensure strong data consistency and traceability.

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EXPERIENCE

Full-stack Developer

Moneta Communications

10/2016 - 11/2019 Manchester, Greater Manchester, United Kingdom Designed and delivered modern web applications transitioning from PHP (Laravel) + AngularJS to Node.js + React, improving long-term maintainability and scalability of the product stack. Optimized backend performance by integrating RESTful APIs with PostgreSQL and Redis caching, reducing query response times by 30%+.

Developed containerized microservices with Docker and automated CI/CD pipelines using GitLab CI, accelerating release cycles and reducing manual QA effort.

Partnered with QA teams to implement BDD practices with Cucumber and Selenium, aligning automated tests with business logic and cutting UAT feedback cycles significantly.

Led the end-to-end development of a custom CMS platform serving 15+ SME clients, built with Vue.js and Nuxt.js dynamic routing, enabling faster deployment of tailored content solutions. Migrated legacy cron-job systems to event-driven architecture using RabbitMQ and Node workers, enhancing system observability and improving scalability under peak load.

Integrated Google Cloud Storage and Firebase for file management and push notifications, streamlining digital asset workflows and real- time user communication.

Enhanced UX and accessibility through Lighthouse audits and adherence to WCAG standards, improving usability scores and compliance for diverse user groups.

Developed reusable component libraries with React, Storybook, and ESLint, enforcing design system consistency and reducing frontend defects.

Contributed to Agile processes (sprint planning, backlog grooming, retrospectives), helping the team improve delivery predictability and cross-functional communication.

SKILLS

JavaScript TypeScript React Next.js React Native Redux AI Angular Vue.js Ecommerce Blockchain Material-UI Storybook Tailwind CSS Axios Bootstrap D3.js Vite SASS LESS Node.js Nest JS MySQL GraphQL Express.js MongoDB PostgreSQL Cypress Jest React Testing Library Jira Figma GitLab GitHub Confluence Postman Agile GitFlow CI/CD BEM AWS Azure WebSocket.io Docker Kubernetes Firebase LANGUAGES

English

Fluent

EDUCATION

Bachelor's Degree, Computer Science

University of Manchester

10/2012 - 02/2016

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