Similarweb
SaaS
Backenddeveloper(Webcrawling,Java&Python)
Neural analysis suggests this role is
optimal for Mid candidates.
“Backend developer (Web crawling, Java & Python) at Similarweb. Skills: Java, Spring Boot, Python, Web crawling. Maintain legacy systems. Optimize legacy systems”
Industry & Context.
What They're Looking For.
Must Have
4+ years Java development, Core Java, Multithreading, Performance tuning, Spring Boot, RESTful APIs, JPA, Security, Batch processing, Advanced SQL/NoSQL skills, Schema design, Query optimization, Aggregation pipelines, Docker, docker-compose, Git/GitLab, Branching strategies, Code reviews, Merge requests, Python scripting, Scrapy, Fluent English
Nice to Have
Decomposing monoliths, DDD, Event-driven architecture, API gateways, Kubernetes, Cluster management, Helm charts, Scaling, Kafka, Event streaming, Producers/consumers, Connectors, Monitoring tools, Prometheus/Grafana, ELK stack, Error tracking, Web crawling libraries, Jsoup, Selenium, Apache Nutch, Proxy rotation, CAPTCHA bypass, Anti-scraping mechanisms
What You'll Do.
Maintain legacy systems
Optimize legacy systems
Modernize legacy systems
Migrate to microservices
Design backend solutions
Optimize database performance
Integrate pricing analytics
Integrate recommendation engines
Use automated testing
How You'll Work.
Team & Collaboration
Collaborate with data teams; Peer reviews
Communication Scope
Fluent English
Full Job Description
Backend developer (Web crawling, Java & Python) What makes the Similarweb R&D team awesome? We love data! At Similarweb you have the opportunity to work with it on a massive scale, processing huge volumes of data across a wide variety of global marketplaces. We work with high‑load, highly dynamic environments, advanced bot‑protection mechanisms, and complex data pipelines running in Kubernetes. Work with cutting edge technology - we often beta test the tech that other people will only discover next year! We want you to get better and help you set goals and conquer them Key Responsibilities: Maintain, optimize, and modernize legacy monolithic systems during migration to microservices. Design scalable backend solutions for high-frequency web crawling and data processing. Optimize database performance for MongoDB (primary), PostgreSQL, and ClickHouse. Collaborate with data teams to integrate pricing analytics and recommendation engines. Ensure code quality via CI/CD pipelines, automated testing, and peer reviews. Core Requirements: 4+ years Java development (Core, multithreading, performance tuning). Expert-level Spring Boot (RESTful APIs, JPA, security, batch processing). Advanced SQL/NoSQL skills (schema design, query optimization, aggregation pipelines). Hands-on Docker/docker-compose for containerization and local development. Proficiency in Git/GitLab (branching strategies, code reviews, merge requests). Python scripting for crawling (Scrapy), prototyping or automation tasks. Fluent English (daily standups, technical docs, client-facing demos). Critical Assets: Experience decomposing monoliths (DDD, event-driven architecture, API gateways). Familiarity with Kubernetes (cluster management, Helm charts, scaling). Kafka/event streaming for real-time data pipelines (producers/consumers, connectors). Monitoring tools (Prometheus/Grafana, ELK stack, error tracking). Nice-to-Have: Web crawling libraries (Jsoup, Selenium) or frameworks (Scrapy, Apache Nutch). Understandin
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