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AIMPROSOFT is looking for a Java Tech Lead / Solution Architect (React , Telecom)

Aimprosoft, a fast-growing IT company, is looking for a Java Tech Lead / Solution Architect (React , Telecom) on a contract basis ( 4+ months) an international project in the Telecommunications / BSS-OSS domain.

This is a senior hands-on role for an experienced Java engineer who combines solution architecture, technical leadership, and production development. You will join the project first, shape the technical foundation during discovery, and then lead a team of three Full-Stack Java Developers through the MVP delivery.

The role is approximately 50% architecture and technical leadership / 50% hands-on production coding.

About the project & role:
The client is a UK wholesale internet service provider supplying broadband, Ethernet, and connectivity services to resellers and partners.
The project is Phase 1 of a new customer and admin portal and integration platform (BSS/OSS) designed to replace manual and legacy processes and become the first production slice of the client's target platform.
The technical environment includes:
Java & Spring Boot
React & TypeScript
Microservices and event-driven architecture
PostgreSQL
BPMN / workflow orchestration
OAuth2 / OIDC and Auth0
AWS
Docker and Kubernetes
CI/CD
TM Forum Open APIs

Your key responsibilities will include:
Owning the solution architecture for the client portal and integration platform
Leading the initial technical discovery and helping define the MVP implementation approach
Designing domain models, APIs, integration flows, and event-driven components
Writing production Java / Spring Boot code, particularly for technically complex parts of the platform
Leading and mentoring a team of three Full-Stack Java Developers
Reviewing code and establishing engineering standards and quality gates
Guiding the React portal architecture and UI standards
Designing integrations with external and legacy systems
Making and documenting architecture decisions using ADRs and C4 diagrams
Working closely with DevOps and QA on AWS environments, CI/CD, contract testing, and integrations
Communicating directly with the UK client and third-party technical teams
Presenting technical progress through regular live demos

What We Need From You:
Hands-on experience in the Telecommunications domain, ideally with ISP, BSS/OSS, broadband, order management, product catalogues, or service qualification
Experience with TM Forum Open APIs
8+ years of commercial Java development experience
2+ years as a Tech Lead, Solution Architect, or in a similar technical leadership role
Strong hands-on experience with Spring Boot
34+ years of hands-on experience with React / ReactJS and TypeScript
English: Upper-Intermediate (B2+) / Advanced (C1) for direct communication with a UK client
Experience designing and delivering microservice and integration-heavy systems
Strong understanding of Domain-Driven Design (DDD) and event-driven architecture
Ability to review frontend code, guide React application architecture and contribute to frontend development when needed
Practical experience with reliability and integration patterns such as Transactional Outbox, idempotency, retries, and asynchronous processing
Experience designing REST APIs and OpenAPI-based contracts
Experience integrating with multiple external systems and third-party APIs
Practical experience with Camunda, Flowable, or a similar workflow / orchestration engine
Practical experience with OAuth2 / OIDC, Spring Security, and RBAC
Hands-on experience with AWS and containerized environments (EKS or ECS, Docker)
Understanding of CI/CD and modern software delivery practices
Experience with AI-assisted development tools such as Claude Code or Cursor
Experience leading developers through technical planning, code reviews, mentoring, and delivery
Nice to have:
Experience with PostgreSQL, Flyway, or Liquibase
Experience with Kafka or AWS SQS
Experience with Terraform or AWS CDK
Understanding of multi-tenant architectures
Experience with Auth0
Experience with telecom/network systems such as RADIUS, NetBox, or IPAM
Experience with UK broadband ecosystems such as Openreach, PXC, or CityFibre
Experience leading technical discovery phases or architecture spikes

What We Offer:
Official military deferment (reservation);
A competitive salary that appreciates your skills and experience;
Opportunity to join a strategically important pilot team with long-term project prospects
Work on modern cloud-native products that deliver real-world impact
Exposure to AI-powered development practices and enterprise-scale engineering
Open environment where your ideas, technical expertise are valued

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