Alen Mašić
@alenmai
Senior software engineer specializing in backend systems and scalable cloud architectures with Go, PHP, and data platforms.
What I'm looking for
I’m a Senior Software Engineer with over 13 years of experience delivering backend platforms and production systems, with a strong track record in Go, PHP, and cloud-based technologies. I’m known for optimizing systems, implementing robust testing practices, and shipping scalable, maintainable code.
In my recent role at TightLine, I work on backend and data mastering using Go alongside Postgres, Clickhouse, ElasticSearch, Docker, and Kubernetes. I focus on performance, observability-ready components, and reliable services that can grow with product demands.
At Gelato, I maintained backend services for the logistics module using Go, Postgres, RabbitMQ, Docker, Kubernetes, and Redis. I also improved packaging efficiency, reducing costs by 10% and minimizing waste, and upgraded the transport layer with an OpenAPI generator to increase development speed by 20%.
Previously, at LiquiDonate and Symphony, I led backend development, contributed to frontend features, and increased reliability through unit and end-to-end tests—improving backend reliability by 30%. I’ve also refactored systems from MVC to Domain-Driven Design (DDD) and migrated from Google Datastore to MySQL to significantly enhance performance, and I continue to enjoy full-stack collaboration when it helps the product move faster.
Experience
Work history, roles, and key accomplishments
Senior Software Engineer
TightLine
Jun 2025 - Present (1 year)
Working on backend and data mastering using Go, PostgreSQL, ClickHouse, and Elasticsearch, deployed with Docker and Kubernetes.
Senior Software Engineer
Gelato
Aug 2022 - Jun 2025 (2 years 10 months)
Maintained the logistics module backend using Go, PostgreSQL, RabbitMQ, Redis, Docker, and Kubernetes. Improved packaging with a more efficient algorithm, reducing costs by 10%, and replaced the transport layer with an OpenAPI generator to increase development speed by 20%.
Senior Software Engineer
LiquiDonate
Apr 2022 - Oct 2023 (1 year 6 months)
Led backend development and contributed to frontend features using Go, GraphQL, Redis, Docker, and React. Implemented unit and end-to-end tests, improving backend reliability by 30%.
Senior Software Engineer
Symphony
Apr 2021 - Aug 2022 (1 year 4 months)
Worked on full-stack development using React and Python, participating in agile ceremonies and refining technical requirements.
Senior Software Engineer
Claire Automotive Support
Feb 2019 - Apr 2021 (2 years 2 months)
Refactored the backend from MVC to Domain-Driven Design (DDD) and migrated from Google Datastore to MySQL to enhance performance. Built a customer communication module that increased sales and revenue by 20%.
Freelance Software Engineer
Upwork
Feb 2012 - Feb 2019 (7 years)
Developed full-stack applications using PHP, Go, Laravel, MySQL, Firebase, and ReactJS while delivering freelance projects end-to-end.
Education
Degrees, certifications, and relevant coursework
Univerzitet u Bihacu
Bachelor of Engineering (B.Eng.), Engineering
Earned a Bachelor of Engineering (B.Eng.) from Univerzitet u Bihacu.
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
Job categories
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