Cost efficiency
€30K
Annual infrastructure savings delivered through dynamic scaling and workload optimization.
Full-stack engineer
I turn complex systems into reliable progress.
Ishan Mahajan is a full-stack engineer with 9+ years of experience shipping high-scale product flows, strengthening critical infrastructure, and making the operational work behind great products feel effortless.
01 / impact
Useful engineering leaves a measurable trace.
A selection of outcomes from improving systems, development practices, and day-to-day product delivery.
Operational savings
€5K/mo
Recurring logistics savings uncovered through resource analysis and right-sizing.
High-load readiness
10×
Traffic-readiness work supported for a critical logistics platform under high load.
02 / selected work
Made for the work behind the interface.
Made cost discipline a systems capability.
Designed dynamic load-test scaling, eliminated stale infrastructure, and improved database efficiency—cutting annual spend by roughly €30K while increasing operational confidence.
Turned service reliability into a product feature.
Built stable staging foundations, sharper SLO-based alerts, cleaner dashboards, and practical runbooks that help teams ship and respond with less uncertainty.
Owned critical delivery flows end to end.
Moved from requirements and RFCs through implementation, rollout, observability, and support for high-visibility logistics capabilities across multiple markets.
Made complex changes safer to operate.
Led cache, database, API, and deployment improvements with careful compatibility work, documented upgrade paths, and a focus on resilient on-call operations.
03 / experience
A career shaped by building, improving, and owning.
2022 — present
Software Engineer
Delivery Hero
Owning high-scale logistics flows across Ruby on Rails, Kotlin, React, PostgreSQL, AWS, CI/CD, observability, incident response, service upgrades, and high-load readiness.
2019 — 2022
Full-Stack Engineer
HFC, Delivery Hero
Developed TypeScript applications and APIs with Next.js, Node.js, GraphQL, REST, asynchronous workflows, and a strong testing culture.
2017 — 2019
Full-Stack Engineer
75 Way Technologies
Delivered web and mobile products end-to-end, with hands-on work in performance, deployment, quality, and product iteration.
04 / capabilities
A practical full-stack toolkit.
- Product engineering React · Next.js · TypeScript
- Backend systems Ruby on Rails · Kotlin · Node.js
- Data & APIs PostgreSQL · Redis · MongoDB · GraphQL · REST
- Platform engineering AWS · Kubernetes · Terraform · CI/CD
- Reliability practice SLOs · observability · load testing · runbooks
- Quality systems Jest · integration testing · service ownership
05 / contact
Have a meaningful problem to solve?
I’m always interested in thoughtful product and systems challenges.