Stanislav S.
Lead Back-End Engineer | Java + Spring | Code investor-ready products
Lead Back-End Engineer | Java + Spring | Building scalable, secure, and investor-ready products For 9+ years, I’ve been helping startups and growing businesses build reliable, fast, and maintainable back-ends that actually support scale — not just run. 💡 What you get working with me: Architecture that lasts: I design solutions that stay clean and efficient even as your product grows. Speed and clarity: Delivering results fast — with clear documentation and full transparency. Cross-domain expertise: Healthcare, E-Commerce, IoT, CRM, E-Learning. I understand business logic, not just code. AI & ML integration: GPT-based and ML-driven systems for smarter automation. Tech stack: Java, Spring (Boot, Security, Data, Batch), Hibernate, PostgreSQL, MongoDB, Redis, Elasticsearch, RabbitMQ, Docker, Jenkins, Linux, GitLab CI/CD. ✅ Bonus: I write clean, test-covered code (JUnit, Selenium) and handle deployment — from staging to production. Let’s turn your concept into a fast, stable, and scalable system. 📩 Message me to discuss your current challenge — I’ll help you find the smartest solution.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $59k
Billed in all: $242,333$242k
$29k in the last 6 months
Across 11 contracts
Earnings, last 30 days
Skill rankings: #1 in 1 skill of 10
Rarest: top 0.46% in MySQL, of 14,471. Ranked by MRR among everyone on Upwork with the skill.
- Business Logic Layer51 freelancers · 🇺🇦 #1Top 2%🇺🇦#1 of 3
- Requirements Specification246 freelancers · 🇺🇦 #1Top 1%🇺🇦#1 of 19
- Automated Deployment Pipeline197 freelancers · 🇺🇦 #1Top 2%🇺🇦#1 of 2
- #5Hibernate677 freelancers · 🇺🇦 #2Top 0.74%🇺🇦#2 of 66
- #12Spring Framework880 freelancers · 🇺🇦 #3Top 1%🇺🇦#3 of 79
- #24CI/CD3,691 freelancers · 🇺🇦 #2Top 0.65%🇺🇦#2 of 259
- #54MongoDB10,865 freelancers · 🇺🇦 #10Top 0.50%🇺🇦#10 of 735
- #63API7,943 freelancers · 🇺🇦 #8Top 0.79%🇺🇦#8 of 669