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I'm a senior software engineer with 9+ years of experience designing and building scalable, data-driven web applications. I specialize in full-stack engineering, forecasting platforms, scientific data systems, and fintech software, with strong skills in modern JavaScript frameworks (React, Next.js, TypeScript), Python/Django, PostgreSQL, Redis, and AWS. I thrive on collaborating with product and design teams to translate complex requirements into scalable architectures, optimize performance, and deliver reliable features. I enjoy mentoring engineers, driving test-driven development, and contributing to mission-driven platforms that deliver trusted insights for global decision-making.…I'm a senior software engineer with 9+ years of experience designing and building scalable, data-driven web applications. I specialize in full-stack engineering, forecasting platforms, scientific data systems, and fintech software, with strong skills in modern JavaScript frameworks (React, Next.js, TypeScript), Python/Django, PostgreSQL, Redis, and AWS. I thrive on collaborating with product and design teams to translate complex requirements into scalable architectures, optimize performance, and deliver reliable features. I enjoy mentoring engineers, driving test-driven development, and contributing to mission-driven platforms that deliver trusted insights for global decision-making.

Matti Laine

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

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I'm a senior software engineer with 9+ years of experience designing and building scalable, data-driven web applications. I specialize in full-stack engineering, forecasting platforms, scientific data systems, and fintech software, with strong skills in modern JavaScript frameworks (React, Next.js, TypeScript), Python/Django, PostgreSQL, Redis, and AWS. I thrive on collaborating with product and design teams to translate complex requirements into scalable architectures, optimize performance, and deliver reliable features. I enjoy mentoring engineers, driving test-driven development, and contributing to mission-driven platforms that deliver trusted insights for global decision-making.…I'm a senior software engineer with 9+ years of experience designing and building scalable, data-driven web applications. I specialize in full-stack engineering, forecasting platforms, scientific data systems, and fintech software, with strong skills in modern JavaScript frameworks (React, Next.js, TypeScript), Python/Django, PostgreSQL, Redis, and AWS. I thrive on collaborating with product and design teams to translate complex requirements into scalable architectures, optimize performance, and deliver reliable features. I enjoy mentoring engineers, driving test-driven development, and contributing to mission-driven platforms that deliver trusted insights for global decision-making.

Available to hire

I’m a senior software engineer with 9+ years of experience designing and building scalable, data-driven web applications. I specialize in full-stack engineering, forecasting platforms, scientific data systems, and fintech software, with strong skills in modern JavaScript frameworks (React, Next.js, TypeScript), Python/Django, PostgreSQL, Redis, and AWS.

I thrive on collaborating with product and design teams to translate complex requirements into scalable architectures, optimize performance, and deliver reliable features. I enjoy mentoring engineers, driving test-driven development, and contributing to mission-driven platforms that deliver trusted insights for global decision-making.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Finnish

Intermediate

Work Experience

Senior Full Stack Engineer at Haystack

November 1, 2023 - Present

Designed and implemented forecasting features for a prediction intelligence platform, enabling users to create, analyze, and interact with forecasts using Next.js, React, TypeScript, Tailwind, and Django APIs. Collaborated with product and design to translate forecasting requirements into scalable architectures with Django, PostgreSQL, Redis, Supabase, and AWS. Optimized real-time forecasting pipelines, reducing API response times by 35% and increasing live update throughput by 40%. Implemented CI/CD pipelines via GitHub Actions + AWS + Vercel, reducing deployment cycles from weekly to daily. Integrated error tracking and monitoring with Sentry, AWS CloudWatch, and GCP, reducing MTTR by 25%. Led test-driven development adoption and code quality practices, raising team-wide coverage by 20%. Mentored 3 junior developers in iterative prototyping, system design, and performance optimization.

Full Stack Engineer at Ximedes

September 1, 2023 - October 2, 2025

Contributed to a transaction processing platform for financial institutions, architected with Python (Django), React, TypeScript, PostgreSQL, and Redis. Engineered high-throughput APIs handling thousands of transactions per second with Django + PostgreSQL, improving latency by 30%. Modernized frontend with React + TypeScript, improving UX performance metrics (Lighthouse scores) by 25%. Containerized applications with Docker + Kubernetes on AWS, achieving 99.9% uptime across services. Introduced GitHub Actions CI/CD pipelines, cutting release overhead by 50%. Implemented monitoring & logging with Prometheus, Grafana, and ELK stack, reducing downtime by 20%. Designed RBAC and data encryption flows, aligning with PSD2 compliance standards. Integrated automated test suites (pytest, Jest) increasing coverage by 35% and reducing regressions. Collaborated with cross-border teams in Agile/Scrum, leading sprint demos and technical discussions.

Full Stack Developer at Blueprint Genetics

June 1, 2020 - October 2, 2025

Developed clinical bioinformatics tools for genetic testing workflows, using Python/Django, PostgreSQL, and React. Implemented secure APIs in Django, enabling integration with hospital systems and reducing manual reporting time by 40%. Migrated infrastructure to AWS (EC2, S3, RDS) with Dockerized services, improving scalability and uptime. Enhanced data visualization dashboards in React, supporting scientists in reviewing results faster by 25%. Improved system reliability with pytest test automation + Jenkins CI/CD, lowering release bugs by 30%.

Junior Software Developer at Yousician

December 1, 2017 - October 2, 2025

Built interactive music-learning features with JavaScript (ES6), React, Node.js, and REST APIs. Contributed to real-time audio/notation rendering pipelines, reducing audio-visual lag by 15%. Deployed features on AWS (EC2, S3, CloudFront), ensuring smooth global performance. Implemented continuous integration with Travis CI and improved automated testing, cutting regression issues by 20%.