I’m a dynamic software engineer with a passion for building scalable web platforms and distributed backend systems. Over the past decade, I’ve delivered data-driven applications across enterprise service management, marketing technology, and high-traffic digital platforms. I thrive on performance, modular architectures, and real-time data processing, and I enjoy collaborating across product, design, and operations to ship resilient cloud-native solutions. In recent roles I’ve combined Python/FastAPI and Node.js with React/TypeScript to craft API-first platforms, scalable pipelines, and intuitive dashboards. I’m comfortable operating at the intersection of backend systems, data modeling, and frontend usability, always aiming to reduce latency and improve observability in production environments.

Lehtinen Erik

I’m a dynamic software engineer with a passion for building scalable web platforms and distributed backend systems. Over the past decade, I’ve delivered data-driven applications across enterprise service management, marketing technology, and high-traffic digital platforms. I thrive on performance, modular architectures, and real-time data processing, and I enjoy collaborating across product, design, and operations to ship resilient cloud-native solutions. In recent roles I’ve combined Python/FastAPI and Node.js with React/TypeScript to craft API-first platforms, scalable pipelines, and intuitive dashboards. I’m comfortable operating at the intersection of backend systems, data modeling, and frontend usability, always aiming to reduce latency and improve observability in production environments.

Available to hire

I’m a dynamic software engineer with a passion for building scalable web platforms and distributed backend systems. Over the past decade, I’ve delivered data-driven applications across enterprise service management, marketing technology, and high-traffic digital platforms. I thrive on performance, modular architectures, and real-time data processing, and I enjoy collaborating across product, design, and operations to ship resilient cloud-native solutions.

In recent roles I’ve combined Python/FastAPI and Node.js with React/TypeScript to craft API-first platforms, scalable pipelines, and intuitive dashboards. I’m comfortable operating at the intersection of backend systems, data modeling, and frontend usability, always aiming to reduce latency and improve observability in production environments.

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Experience Level

Expert
Expert
Expert
Expert
Expert
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Intermediate
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Work Experience

Senior Software Engineer at Enterprise Service Management Platform
April 1, 2025 - Present
Engineered modular Enterprise Service Management (ESM) platform components using Python, FastAPI, and PostgreSQL, enabling flexible workflow orchestration and reducing integration overhead across enterprise service modules. Implemented multi-tenant service requests with structured schemas and rule-based execution layers, improving processing consistency across distributed environments. Developed React and TypeScript-based interfaces for service catalog and workflow dashboards, optimizing UI latency through efficient state management. Designed event-driven architecture using AWS Lambda and Docker-based deployment pipelines to scale high-volume workflows. Integrated real-time observability pipelines, improving system visibility and reducing incident resolution times. Optimized relational data models and query plans in PostgreSQL for better performance under high concurrency. Collaborated on API-first design for internal and external integrations.
Software Engineer at Digital Funnel Optimization Platform
February 1, 2020 - April 1, 2025
Developed a large-scale conversion funnel platform using Node.js, TypeScript, and React, enabling real-time traffic routing and engagement tracking across distributed campaigns. Built backend services for session tracking, event aggregation, and behavioral analytics pipelines, increasing throughput of high-frequency user interaction data. Implemented reusable frontend funnel components with TypeScript-based type safety, reducing UI regressions. Designed scalable APIs using Node.js and asynchronous processing to handle peak traffic bursts. Integrated cloud-based data pipelines on AWS for near real-time reporting. Optimized PostgreSQL schemas for event storage and segmentation queries. Applied distributed system design for routing logic and experiment management to support A/B testing.
Software Engineer at Marketing Technology Platform
March 1, 2018 - January 1, 2020
Developed core components of a MarTech platform supporting lead management and campaign automation using Python and REST APIs, enabling structured customer engagement workflows. Built lightweight frontend modules for campaign dashboards, improving usability of marketing performance interfaces. Designed data processing pipelines for lead ingestion and transformation, ensuring consistency of event-based marketing triggers across integrated systems. Supported integration of external marketing tools via API connectors, enabling reliable synchronization of customer and campaign data.
Junior Software Developer at Social Networking Platform
October 1, 2015 - February 1, 2018
Developed backend services for a social networking platform using Python and relational databases, supporting user profiles, feeds, and messaging functionalities. Implemented real-time update mechanisms for posts and notifications to improve responsiveness. Built basic frontend components with early JavaScript and jQuery, supporting interactive content rendering. Optimized queries and indexing to improve feed loading performance under increasing user activity.

Education

Bachelor of Computer Science at University of Turku
October 1, 2011 - October 1, 2015

Qualifications

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Industry Experience

Software & Internet