You will get Java Spring Boot | FinTech | Microservices | Kafka | AWS | Azure
Project details
We provide senior-level Java Spring Boot engineering services for secure, scalable, and high-performance backend systems in fintech and enterprise environments.
Our team designs and develops mission-critical platforms with a strong focus on reliability, transactional integrity, and distributed architectures. We can integrate with your existing team or take ownership of specific backend initiatives, delivering production-ready solutions.
Services:
Fintech backend development
Microservices architecture
Legacy Java modernization
Payment and transaction systems
Banking integrations
Event-driven systems
API design and development
Performance optimization
System refactoring and scalability improvements
Technology Stack:
Java 17+, Spring Boot, Spring Cloud, Spring Security, Hibernate, JPA, Kafka, RabbitMQ, REST/gRPC APIs, PostgreSQL, MySQL, MongoDB, Redis, Docker, Kubernetes, AWS, Azure, Jenkins, GitHub Actions, GitLab CI, Prometheus, Grafana, ELK, OAuth2, Keycloak.
As an EU-based software engineering company, we help banks, payment providers, and enterprise organizations build robust, maintainable, and future-ready backend platforms.
Our team designs and develops mission-critical platforms with a strong focus on reliability, transactional integrity, and distributed architectures. We can integrate with your existing team or take ownership of specific backend initiatives, delivering production-ready solutions.
Services:
Fintech backend development
Microservices architecture
Legacy Java modernization
Payment and transaction systems
Banking integrations
Event-driven systems
API design and development
Performance optimization
System refactoring and scalability improvements
Technology Stack:
Java 17+, Spring Boot, Spring Cloud, Spring Security, Hibernate, JPA, Kafka, RabbitMQ, REST/gRPC APIs, PostgreSQL, MySQL, MongoDB, Redis, Docker, Kubernetes, AWS, Azure, Jenkins, GitHub Actions, GitLab CI, Prometheus, Grafana, ELK, OAuth2, Keycloak.
As an EU-based software engineering company, we help banks, payment providers, and enterprise organizations build robust, maintainable, and future-ready backend platforms.
Programming Languages
Python, Java, C#Coding Expertise
Cross Browser & Device Compatibility, Localization, SecurityWhat's included $200
These options are included with the project scope.
$200
- Delivery Time 2 days
- Number of Revisions 1
- Design Customization
- Content Upload
- Responsive Design
- Source Code
Frequently asked questions
About Serhii
Senior .NET Developer/Architect | ASP.NET Core | AWS | React | Angular
Kyiv, Ukraine - 12:53 am local time
🧠 Full Stack Developer Expertise
Backend
C#, .NET Core, .NET 6–10 (ASP.NET Web API, Blazor, MVC)
Python (FastAPI, Django, automation scripts, backend services)
Node.js for microservices and lightweight integrations
REST APIs, GraphQL, Webhooks, event-driven architecture
Clean Architecture, SOLID principles, microservices design patterns
Frontend
React.js, Angular, Vue.js, TypeScript
Razor, Blazor UI including enterprise and internal tooling scenarios
Component libraries: Kendo UI, Telerik, DevExpress
HTML5, CSS3, responsive and accessible UI systems
DevOps & Cloud
Azure App Services, Azure Functions, AWS (Lambda, S3, RDS, EC2)
Docker, Kubernetes, Helm containerized deployments at scale
CI/CD pipelines: Azure DevOps, GitHub Actions, Jenkins, Terraform
Monitoring: Grafana, Prometheus, ELK, Datadog
IAM, RBAC, FinOps security, access control, cloud cost optimization
Databases
SQL Server, PostgreSQL, MySQL
MongoDB, Cosmos DB, Redis
Performance tuning, indexing strategies, schema design, query optimization
Security & Compliance
OAuth2, JWT, SSO enterprise authentication systems
Cloud security: Azure Defender, Cloudflare, Wiz, Aqua Security
GDPR, HIPAA aligned architecture design
Secure CI/CD pipelines and deployment practices
☁️ Enterprise Experience
Large-scale SaaS platforms (multi-tenant, high-load)
ERP and CRM systems integration and development
Marketplace platforms and distributed architectures
Cloud-native system design on Azure and AWS
Legacy system modernization (.NET Framework to .NET 6+)
🚀 Why Work With Me
✔️ End-to-end ownership from database schema to deployed UI
✔️ Strong .NET and Python backend foundation with real frontend depth
✔️ DevOps-first mindset systems built to run, scale, and be observable
✔️ Enterprise architecture experience with security and compliance in scope
✔️ Clear communication, long-term collaboration, consistent delivery
Steps for completing your project
After purchasing the project, send requirements so Serhii can start the project.
Delivery time starts when Serhii receives requirements from you.
Serhii works on your project following the steps below.
Revisions may occur after the delivery date.
Analyze current architecture and codebase
Review scalability, security, and performance