Jobs Java

Workload: Full-time
Start: ASAP
Duration: Long-term (3+ years)
Location: open
English: B2+

Key Requirements & Technical Stack
Core Task: Integration with a 30-year-old legacy healthcare system and rewriting legacy screens into modern UI.
Database & Legacy: Deep hands-on experience with Oracle ADF and PL/SQL.
Modern Backend: Java / Spring (thin service layer architecture).
Frontend: React (rewriting screens from scratch).
Role Focus: Technical leadership/execution on legacy decoupling, data integration, and UI modernizing.

(candidates only with white-label CVs explicitly showing experience with Oracle ADF/PL/SQL and React!)

About the Project

AI Interview Platform (client name undisclosed) — a leading technical interviewing platform used by fast-growing startups and large enterprises worldwide. It pairs experienced engineers with standardized interview frameworks to enable fair, high-signal, and scalable hiring for software engineers globally.

What You'll Do

• Conduct live technical interviews with software engineering candidates worldwide via the platform.
• Assess coding skills, problem-solving abilities, technical knowledge, and communication while creating a professional and inclusive candidate experience.
• Provide structured, objective feedback based on established evaluation criteria to reduce bias and improve hiring quality.
• Collaborate with the client’s team to test, refine, and improve interview content, processes, and platform features.

Must Have

• 4+ years of professional experience as a Software Engineer/Developer.
• Strong Java proficiency + working knowledge of frontend technologies (JavaScript, React, or similar).
• Solid understanding of algorithms, data structures, and software engineering fundamentals.
• Excellent English communication skills (spoken and written).
• Professional demeanor, ability to deliver objective assessments, and reliable setup (webcam, microphone, stable internet).

Nice to Have

• Prior experience conducting technical interviews (DS&A, system design).
• Mentoring, coaching, or technical leadership experience.
• Interest in talent assessment, interviewing best practices, or inclusive hiring.

Location: EU / Remote (Ukraine)

Type: Freelance full-time (first 3 months), with option to go part-time later.

Project Description:

Our Client is a leading global financial markets infrastructure and data provider. Their purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

With capabilities in data, indices and analytics, capital formation, trade execution, clearing and risk management, they operate at the heart of the world's financial ecosystem and enable the sustainable growth and stability of their customers and their communities.

We are seeking a highly motivated Software Engineer with hands-on experience in development and Cloud platform to join our team where your experience will make a significant impact on the world's leading financial markets infrastructure!

Responsibilities:

• Be responsible for the whole software process, including design, planning, coding, automated unit testing and CI/CD and deployment process.
• Break down sophisticated problems into its essentials, design and implement features.
• Build well-structured and maintainable code.
• Participate in code review to ensure code quality and standard methodologies.
• Act as an agile developer, flexible to play multiple roles in the team.
• Be flexible to learn new technologies as required by the project and find opportunities for improvements.
• Lead in identifying and solving software defects and issues.
• Actively participate in project planning sessions with team members to analyze requirements and estimates of work.
• Supply the documentation of software solutions.

Mandatory Skills Description:

• 8+ years of proven experience as a Senior Software Engineer with extensive experience in software development..
• Expertise in Java (v11, v18). Strong understanding of object-oriented principles
• Experience in OpenJDK (v18), Debian.
• Experience in building Cloud Native application, preferably Amazon AWS or Microsoft Azure
• Experience working with Relational databases and caching technologies like Redis
• Expertise in version control software such as GIT etc.
• Familiar with CI/CD like GitHub, GitLab, DevSecOps etc.
• Experience in writing Shell/Bash/Python scripts
• Strong technical foundation with expertise in backend technologies
• Basic knowledge of frontend development technologies (JavaScript, HTML, CSS etc.)

Nice-to-Have Skills Description:

• BS/MS in Computer Science/Computer Engineering

Languages:

English: B2

The Mission

Wallee Group is a leader in advanced payment solutions, dedicated to providing robust, scalable, and secure systems across multiple domains. We enhance customer experiences through innovative payment and finance technology that empowers businesses to grow efficiently. With operations spanning several countries, we thrive on collaboration and agility, utilizing the Scrum framework to drive our international teams. At Wallee, we stay at the forefront of market trends, continuously innovating to deliver premier services to our global customers.

The Role

To achieve our mission of providing the market's best payment experience, Wallee is seeking experienced and versatile java software engineers for our Vilnius office. As disruptors in the payment space, we build industry-leading systems that demand the highest standards of security and reliability. We are constantly pushing our solutions into new territories, and we are looking for engineers who thrive in a fast-paced, agile environment to help us redefine the future of finance.

Tasks

Your Impact

• Architect Scalability: Design and develop highly resilient back-end systems using Java, ensuring our infrastructure handles global scale with ease.
• Feature Innovation: Own the end-to-end lifecycle of new features, from initial implementation to refined bug fixing and performance tuning.
• Collaborative Engineering: Work closely with product managers, UX designers, and QA to translate complex business needs into elegant technical solutions.
• Code Excellence: Drive quality through automated testing, rigorous code reviews, and the creation of clear, maintainable technical documentation.
• Stay Ahead: Continuously research and evaluate emerging technologies and methodologies to keep Wallee at the cutting edge of the fintech industry.

Requirements

What You Bring to the Table

• Technical Depth: Advanced proficiency in Java and core frameworks such as Spring, Spring Boot, and Hibernate.
• Systems Thinking: Proven experience building distributed systems and scalable, high-availability solutions.
• Data Mastery: Strong proficiency in SQL and experience managing complex data structures.
• Modern DevOps: Hands-on experience with CI/CD pipelines (Jenkins/GitLab CI) and containerization (Docker, AWS ECS).
• Agile Mindset: A degree in Computer Science (or equivalent experience) and a track record of thriving in fast-paced, Agile environments.

• Bonus Points: Experience with JavaScript, Apache Camel, or BPM engines.

   

  Benefits:

• You are part of an agile, young international team and shape our products sustainably with your ideas.
• You will play a decisive role in designing products in an omni channel payment start-up and work with leading companies in the financial industry on international projects.
• We offer flexible structures and flat hierarchies.
• Cooperation with motivated colleagues and numerous personal development opportunities.

Project description

Our Client is a leading global financial markets infrastructure and data provider. Their purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.
With capabilities in data, indices and analytics, capital formation, trade execution, clearing and risk management, they operate at the heart of the world's financial ecosystem and enable the sustainable growth and stability of their customers and their communities.
We are seeking a highly motivated Software Engineer with hands-on experience in development and Cloud platform to join our team where your experience will make a significant impact on the world's leading financial markets infrastructure!

Responsibilities

Be responsible for the whole software process, including design, planning, coding, automated unit testing and CI/CD and deployment process.

Break down sophisticated problems into its essentials, design and implement features.

Build well-structured and maintainable code.

Participate in code review to ensure code quality and standard methodologies.

Act as an agile developer, flexible to play multiple roles in the team.

Be flexible to learn new technologies as required by the project and find opportunities for improvements.

Lead in identifying and solving software defects and issues.

Actively participate in project planning sessions with team members to analyze requirements and estimates of work.

Supply the documentation of software solutions.

Skills

Must have

8+ years of proven experience as a Senior Software Engineer with extensive experience in software development..

Expertise in Java (v11, v18). Strong understanding of object-oriented principles

Experience in OpenJDK (v18), Debian.

Experience in building Cloud Native application, preferably Amazon AWS or Microsoft Azure

Experience working with Relational databases and caching technologies like Redis

Expertise in version control software such as GIT etc.

Familiar with CI/CD like GitHub, GitLab, DevSecOps etc.

Experience in writing Shell/Bash/Python scripts

Strong technical foundation with expertise in backend technologies

Basic knowledge of frontend development technologies (JavaScript, HTML, CSS etc.)

Nice to have

BS/MS in Computer Science/Computer Engineering

Languages

English: C1 Advanced

About the Project:
Join the team of one of the world's largest independent advertising technology companies.

The team develops and maintains real-time, high-load distributed systems that process hundreds of billions of requests while delivering responses in milliseconds. 
The primary focus of this role is building and enhancing the automated testing framework and test infrastructure that ensures the reliability, scalability, and quality of these mission-critical services.

Who We're Looking For:

A Middle Java Developer with solid Java Core expertise who has experience building backend applications and wants to contribute to automation infrastructure, testing frameworks, and engineering quality for large-scale distributed systems.

Working Hours:

• 12:00 PM – 8:00 PM EEST (shifted schedule)
  
  Key Responsibilities
• Design and develop automation testing infrastructure for large-scale distributed systems
• Build and maintain scalable, reusable test frameworks
• Improve build pipelines and Continuous Integration / Continuous Deployment processes
• Design testing strategies for complex microservices and highly integrated systems
• Investigate production and testing issues, perform root cause analysis, and improve system reliability
• Research and prototype new testing technologies and automation approaches
• Collaborate closely with developers, SDETs, product managers, and project teams to deliver high-quality software
• Contribute to engineering best practices and continuous quality improvements
  
  Must-Have Skills
• 2+ years of commercial experience with server-side Java
• Strong Java Core knowledge:
  • Java 8+
  • Multithreading
  • Concurrency
  • Collections
  • Exceptions
• Experience with relational databases (MySQL, PostgreSQL)
• Experience writing native SQL and using Hibernate (or similar ORM)
• Experience with service-oriented architecture and microservices
• Experience with automated testing:
  • Unit Testing
  • Integration Testing
  • Functional Testing
  • TDD
  • Mocking frameworks
• Linux experience
• Experience configuring or working with CI/CD pipelines (GitHub Actions, Jenkins)
• Strong analytical and problem-solving skills
• Ability to work independently in an environment with evolving requirements
  
  Nice to Have
• Experience with the reactive programming paradigm:
  • Project Reactor
  • Spring WebFlux
  • Vert.x
• Experience with test reporting tools
   

Our Client is a leading global financial markets infrastructure and data provider. Their purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

With capabilities in data, indices and analytics, capital formation, trade execution, clearing and risk management, they operate at the heart of the world's financial ecosystem and enable the sustainable growth and stability of their customers and their communities.

We are seeking a highly motivated Software Engineer with hands-on experience in development and Cloud platform to join our team where your experience will make a significant impact on the world's leading financial markets infrastructure!

Responsibilities:
• Be responsible for the whole software process, including design, planning, coding, automated unit testing and CI/CD and deployment process.
• Break down sophisticated problems into its essentials, design and implement features.
• Build well-structured and maintainable code.
• Participate in code review to ensure code quality and standard methodologies.
• Act as an agile developer, flexible to play multiple roles in the team.
• Be flexible to learn new technologies as required by the project and find opportunities for improvements.
• Lead in identifying and solving software defects and issues.
• Actively participate in project planning sessions with team members to analyze requirements and estimates of work.
• Supply the documentation of software solutions.

Mandatory Skills Description:
• 8+ years of proven experience as a Senior Software Engineer with extensive experience in software development..
• Expertise in Java (v11, v18). Strong understanding of object-oriented principles

• Experience in writing Shell/Bash/Python scripts
• Experience in OpenJDK (v18), Debian.
• Experience in building Cloud Native application, preferably Amazon AWS or Microsoft Azure
• Experience working with Relational databases and caching technologies like Redis
• Expertise in version control software such as GIT etc.
• Familiar with CI/CD like GitHub, GitLab, DevSecOps etc.
• Strong technical foundation with expertise in backend technologies
• Basic knowledge of frontend development technologies (JavaScript, HTML, CSS etc.)

Nice-to-Have Skills Description:• BS/MS in Computer Science/Computer Engineering

Languages:
English: C1 Advanced

Our Client is a leading global financial markets infrastructure and data provider. Their purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

With capabilities in data, indices and analytics, capital formation, trade execution, clearing and risk management, they operate at the heart of the world's financial ecosystem and enable the sustainable growth and stability of their customers and their communities.

We are seeking a highly motivated Software Engineer with hands-on experience in development and Cloud platform to join our team where your experience will make a significant impact on the world's leading financial markets infrastructure!

Responsibilities

Be responsible for the whole software process, including design, planning, coding, automated unit testing and CI/CD and deployment process.

Break down sophisticated problems into its essentials, design and implement features.

Build well-structured and maintainable code.

Participate in code review to ensure code quality and standard methodologies.

Act as an agile developer, flexible to play multiple roles in the team.

Be flexible to learn new technologies as required by the project and find opportunities for improvements.

Lead in identifying and solving software defects and issues.

Actively participate in project planning sessions with team members to analyze requirements and estimates of work.

Supply the documentation of software solutions.

Skills

Must have

8+ years of proven experience as a Senior Software Engineer with extensive experience in software development..

Expertise in Java (v11, v18). Strong understanding of object-oriented principles

Experience in OpenJDK (v18), Debian.

Experience in building Cloud Native application, preferably Amazon AWS or Microsoft Azure

Experience working with Relational databases and caching technologies like Redis

Expertise in version control software such as GIT etc.

Familiar with CI/CD like GitHub, GitLab, DevSecOps etc.

Experience in writing Shell/Bash/Python scripts

Strong technical foundation with expertise in backend technologies

Basic knowledge of frontend development technologies (JavaScript, HTML, CSS etc.)

Nice to have

BS/MS in Computer Science/Computer Engineering

Our Client is a leading global financial markets infrastructure and data provider. Their purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

With capabilities in data, indices and analytics, capital formation, trade execution, clearing and risk management, they operate at the heart of the world's financial ecosystem and enable the sustainable growth and stability of their customers and their communities.

We are seeking a highly motivated Software Engineer with hands-on experience in development and Cloud platform to join our team where your experience will make a significant impact on the world's leading financial markets infrastructure!

• Responsibilities:

  • Be responsible for the whole software process, including design, planning, coding, automated unit testing and CI/CD and deployment process.
  • Break down sophisticated problems into its essentials, design and implement features.
  • Build well-structured and maintainable code.
  • Participate in code review to ensure code quality and standard methodologies.
  • Act as an agile developer, flexible to play multiple roles in the team.
  • Be flexible to learn new technologies as required by the project and find opportunities for improvements.
  • Lead in identifying and solving software defects and issues.
  • Actively participate in project planning sessions with team members to analyze requirements and estimates of work.
  • Supply the documentation of software solutions.

• Mandatory Skills Description:

  • 8+ years of proven experience as a Senior Software Engineer with extensive experience in software development..
  • Expertise in Java (v11, v18). Strong understanding of object-oriented principles
  • Experience in OpenJDK (v18), Debian.
  • Experience in building Cloud Native application, preferably Amazon AWS or Microsoft Azure
  • Experience working with Relational databases and caching technologies like Redis
  • Expertise in version control software such as GIT etc.
  • Familiar with CI/CD like GitHub, GitLab, DevSecOps etc.
  • Experience in writing Shell/Bash/Python scripts
  • Strong technical foundation with expertise in backend technologies
  • Basic knowledge of frontend development technologies (JavaScript, HTML, CSS etc.)

We are looking for a motivated Junior+ Java Backend Engineer to join our team and work on a modern microservices-based, event-driven platform running in a cloud environment.
The ideal candidate should have solid Java fundamentals, basic backend development experience, and a strong willingness to learn distributed systems and enterprise-level architecture.

Requirements
Strong knowledge of Java
– Commercial or pet-project experience with Java 17+ (preferably Java 21+)
– Good understanding of OOP, Collections, Multithreading, Exception Handling, Streams API
Backend Development
– Experience building REST APIs using Spring Framework or Spring Boot
– Understanding of Dependency Injection, configuration management, and application lifecycle
– Basic understanding of asynchronous programming concepts
Databases
– Good SQL knowledge and hands-on experience with PostgreSQL or similar relational databases
– Understanding of ORM frameworks (JPA / Hibernate or similar ORM tools)
– Basic understanding of transactions, indexing, and query optimization
Messaging Systems
– Basic understanding of event-driven architecture
– Familiarity with Apache Kafka or other message brokers is a strong plus
– Understanding of asynchronous communication between services

– Understanding of synchronous and asynchronous service-to-service communication

– Basic understanding of Protocol Buffers (Protobuf)

API Development
– Experience working with REST APIs
– Understanding of HTTP protocol, status codes, request lifecycle
– Familiarity with OpenAPI Swagger documentation

Infrastructure & DevOps Basics
– Basic experience with Docker
– Understanding of CI/CD concepts
– Familiarity with GitHub Actions or similar pipelines is a plus
Caching
– Basic understanding of caching principles
– Experience with Redis is a plus
Cloud Platforms
– Basic understanding of cloud infrastructure concepts
– Familiarity with Google Cloud Platform (GCP) is a plus
Architecture Knowledge
– Understanding of Microservices Architecture
– Basic knowledge of distributed systems concepts
– Understanding of event-driven communication patterns
 

General Engineering Skills
– Experience with Git and Maven build system
– Ability to debug backend applications
– Understanding of software development lifecycle
– Good problem-solving skills and willingness to learn complex enterprise systems
 

Nice to Have
– Basic knowledge of Netty
– Experience with API documentation tools (Swagger / Scalar)
– Understanding of monitoring tools such as Micrometer
– Exposure to cloud secret management systems
– Understanding of service discovery concepts
 

We expect
– 1–2 years of commercial experience (or strong internship/pet projects)
– Ability to work independently on small backend tasks
– Strong learning mindset and willingness to work with distributed systems
– Desire to grow toward Middle Java Engineer level

Looking for a Senior (Tech lead) Java developer (ASAP)

Workload: full-time

Start: asap

Duration: long-term (3 years)

Location: EU

English: B2

We’re currently scoping a new project for one of our enterprise clients—a major global consulting firm (for whom we already manage several active maintenance and development streams across multiple entities).

We are looking to partner up to secure senior Java capacity for this account. Here are the key details of what we need:

Project Overview

• Scope: Maintenance and further development of large-scale, complex enterprise calculator applications written in Java.

• User Base & Functionality: Used by ~300 international corporate clients. Features include generating JPK/tax compliance files, financial reporting, and complex data statements.

• Team Scaling:

Immediate/Baseline Need: 1–2 Dedicated Java Developers for ongoing maintenance.

Future Scale: Up to 5 specialists as planned platform expansions roll out.

Specifically, we are looking for someone who could:

Join a client discovery call in 1–2 weeks as a potential Head of Development / Lead Architect (or a senior technical authority who will shape the team’s delivery).Transition into the project to drive technical execution and help scale the team as development ramps up.

Ajax Systems, an international tech company and the largest manufacturer of security systems in Europe.

We are looking for a new team member to join our System devisions as a Senior Java Developer.

The System Division is responsible for building and developing the Ajax software ecosystem. The team develops and maintains OS Malevich and the Video Management System, builds scalable cloud infrastructure, and creates client applications for multiple platforms, ensuring that all system components work together as a unified ecosystem.

The division works with Java, Kotlin, Swift, C, C++, and Python. It includes embedded, cloud, mobile, and desktop engineers who ensure the stable operation of Ajax as a single digital platform.

Responsibilities:

Core Development:

• Design and implement core backend services and data pipelines
• Write clean, readable, and maintainable code
• Develop services for the b2b product line

Architecture & Documentation:

• Actively participate in developing and improving architecture
• Document architectural decisions and operational knowledge for successful deployment and service operations

Quality Assurance:

• Ensure appropriate test coverage with unit and integration testing
• Focus on performance and cost efficiency for areas of responsibility
• Follow best practices in software design and development and promote them within the team

Operations & Monitoring:

• Ensure reliable alerting, dashboards, and runbooks for production services
• Debug production issues, analyze complex cases, and conduct investigations

Collaboration & Culture:

• Work smoothly in a technical culture with testing, CD, and DevOps

• Collaborate within the team and with other engineering teams to develop new features and products according to business needs

   

Requirements:

• Java: 3+ years of professional backend development in enterprise environment
• Kotlin: Knowledge and practical work experience
• Java Concurrency: Strong understanding and practical application experience
• Understanding of SOA, microservice, and event-driven architecture
• Cloud development principles with practical AWS experience

• Ability to scale and ensure high availability of loaded systems

   

Required:

• Any NoSQL database
• Any message broker
• Enterprise-grade stack (messaging brokers, in-memory storages, NoSQL, key-value databases)
• Docker and Kubernetes (containerized applications)

• Git, Gradle, Jenkins

   

Nice to Have:

• Redis, Netty, Akka, gRPC, Project Reactor, NATS, Kafka. MongoDB

• Strong knowledge of unit testing and automated test paradigms

   

We offer:

• The opportunity to suggest and implement your own ideas that directly influence the product and its mass production
• A place in a fast-growing company with a motivated and professional team
• Competitive salary
• Medical insurance
• English classes
• The opportunity to participate in Ajax’s internal beta-testing program for security systems
• Discounts from partner companies

• Discounts on Ajax products

   

Ajax Systems is a Ukrainian success story that has grown into a global product. Ajax devices are trusted by more than 4.5 million end users and 330,000 PRO users in over 180 countries. The company provides comprehensive solutions to protect residential and commercial properties of all sizes. Today, Ajax portfolio includes 280 devices for intrusion protection, video surveillance, fire safety, and comfort and automation.

About Us

Smart Capital Center is an end-to-end, AI-powered platform for Commercial Real Estate (CRE) investment and financial management. We power real-time underwriting, asset management, and portfolio analytics through a combination of live data, workflow automation, and AI-driven insights.

Operating at the intersection of Generative AI, finance, and real estate, we are building systems that digitize and simplify complex financial workflows.

Our clients include leading institutions such as JLL, Pacific Life Insurance Company, and KeyBank. We are a lean, high-performance team building category-defining technology in a $17 trillion industry.

To learn more about our platform and vision, please visit our website.

The Role

We are looking for a Backend Software Engineer with strong experience in building scalable systems and a deep interest in AI-powered applications.

This is a high-impact, hands-on role where you will design and build backend services, integrate AI capabilities, and develop intelligent, agent-driven workflows used in real-world production environments.

You will work closely with product, AI, and engineering teams to deliver reliable, high-performance systems and automation features.

What You Will Do

Backend Development

• Design, build, and maintain backend services using Java (Spring Boot) and Python
• Develop scalable APIs and microservices for data-intensive applications
• Optimize system performance, reliability, and scalability
• Design efficient data models and handle complex integrations

AI & Intelligent Systems

• Implement and integrate AI-powered features into core products
• Design and build agent-based workflows for automation and decision-making
• Apply prompt engineering techniques to improve LLM outputs and behavior
• Work with modern AI frameworks to productionize intelligent systems

Cloud & Infrastructure

• Develop and deploy backend systems on AWS (EC2, S3, RDS, Lambda, etc.)
• Build resilient, scalable cloud-native services
• Contribute to system monitoring, logging, and reliability

System Design & Engineering Excellence

• Contribute to architecture, service boundaries, and system design decisions
• Write clean, maintainable, and well-documented code
• Ensure security, performance, and operational stability
• Continuously improve engineering quality and development practices

Collaboration

• Work closely with frontend, product, and AI teams
• Contribute to end-to-end feature delivery
• Participate in Agile development processes

Requirements

• 5+ years of backend software development experience
• Strong experience building and scaling backend systems in production

Core Technical Skills

• Strong experience with Java and Spring Boot
• Solid experience with Python
• Strong knowledge of SQL and database design (PostgreSQL preferred)
• Experience building REST APIs, microservices, and distributed systems
• Hands-on experience with AWS (EC2, S3, RDS, Lambda, etc.)
• Proficiency with Git and modern development workflows

AI & Modern Development Experience

• Experience with prompt engineering for LLM-based systems
• Practical experience building AI agent workflows in production
• Familiarity with frameworks/tools such as:
  • LangGraph
  • LangChain
  • LangSmith
  • or similar ecosystems
• Experience using AI-assisted development tools, such as:
  • Claude Code
  • Codex
  • OpenCode
  • or similar

Nice to Have

• Experience with vector databases or semantic search (e.g., Milvus)
• Knowledge of RAG (Retrieval-Augmented Generation) architectures
• Experience with CI/CD pipelines and DevOps practices
• Familiarity with event-driven architecture

• Experience with data processing pipelines or document AI systems

   

Why Join Us

• Work on cutting-edge AI-powered systems in a $17T industry
• Build real-world applications using LLMs, agents, and automation
• High ownership and autonomy with meaningful technical impact
• Opportunity to influence system design and engineering direction
• Fast-moving, execution-focused team with minimal bureaucracy
• Competitive compensation and flexible work environment

TJHelpers is committed to developing strong engineering teams through mentorship, real project experience, and our “Helpers as a Service” model. We provide structured growth, hands-on practice, and a supportive environment where engineers can evolve quickly and meaningfully.

We are looking for a Senior Java Developer (Technical Consultant) to join our team and help build scalable, high-performance backend systems for fintech, AI, telecommunications, healthcare, and other high-load domains.

This role combines hands-on backend development with participation in architecture design, technical planning, and a consulting-driven approach to building reliable, scalable, and maintainable systems.

Responsibilities

• Design and develop scalable backend services and microservices using Java 17/21, Spring Boot, and Spring Cloud 
• Participate in architecture design, technical planning, and engineering decision-making 
• Build event-driven systems using Kafka or RabbitMQ and develop REST or GraphQL integrations 
• Improve system performance, scalability, reliability, and maintainability 
• Optimize application performance, database interactions, and backend processing flows 
• Collaborate closely with DevOps, QA, product, and engineering teams 
• Participate in code reviews and contribute to engineering best practices 
• Diagnose and resolve issues in production environments 
• Participate in technical discussions with clients and stakeholders when needed 
• Provide technical guidance, architectural recommendations, and mentorship 

Requirements

• Strong commercial experience with Java and Spring Boot/Spring Cloud 
• Strong experience designing and building microservices, REST APIs, and distributed systems 
• Strong understanding of software architecture principles and integration patterns 
• Experience with PostgreSQL or MySQL and Hibernate/JPA 
• Experience with Kafka, RabbitMQ, or other messaging systems 
• Experience optimizing application performance, scalability, and database interactions 
• Experience with Docker and CI/CD pipelines 
• Experience with at least one cloud platform such as AWS, GCP, or Azure 
• Strong debugging, troubleshooting, and problem-solving skills 
• Ownership mindset and responsibility for technical solutions and delivery quality 
• Ability to communicate technical decisions clearly to both technical and non-technical stakeholders 

Nice to Have

• Experience with Redis, Elasticsearch, or GraphQL 
• Knowledge of Kubernetes or Terraform 
• Experience working with high-load systems, caching, and observability tools such as Prometheus, Grafana, or ELK 
• Familiarity with event-driven architecture and asynchronous communication patterns 
• Experience participating in technical consulting, solution design, or system modernization initiatives  

What We Offer

• Work on real-world projects in fintech, AI, telecommunications, healthcare, and other modern domains 
• Opportunity to influence architecture and technical decisions 
• Clear growth path toward Tech Lead or Architect roles 
• Open engineering culture with transparent processes and strong technical collaboration 
• Flexible schedule and fully remote work opportunities

TJHelpers is committed to developing strong engineering teams through mentorship, real project experience, and our “Helpers as a Service” model. We provide structured growth, hands-on practice, and a supportive environment where engineers can evolve quickly and meaningfully.

We are looking for a Java Developer to join our backend team and contribute to building scalable, high-performance, and reliable microservices for modern products across fintech, AI, telecom, healthcare, and other high-load domains.

Responsibilities

• Design, develop, and maintain scalable backend microservices and APIs.
• Write clean, efficient, and well-tested code using Java (17/21) and Spring Boot.
• Work with event-driven architectures using tools like Kafka or RabbitMQ.
• Integrate with internal and external REST/GraphQL services.
• Collaborate closely with DevOps, QA, and product teams to deliver high-quality features.
• Participate in code reviews and help establish engineering best practices.
• Optimize backend systems for performance, reliability, and cost efficiency.

• Investigate and resolve production issues, contributing to CI/CD and observability improvements.

   

Requirements

• Strong knowledge of Java and hands-on experience with Spring Boot / Spring Cloud.
• Experience building REST APIs, microservices, and integrations.
• Solid understanding of relational databases (PostgreSQL/MySQL) and ORM frameworks (Hibernate/JPA).
• Familiarity with Docker, containerization, and CI/CD pipelines.
• Knowledge of software architecture principles: microservices, event-driven systems, clean architecture.
• Experience with Git, unit testing (JUnit), and debugging/profiling tools.

• Good problem-solving skills and ability to work in a fast-paced environment.

   

Nice to Have

• Experience with cloud platforms (AWS, GCP, Azure).
• Knowledge of Kafka, Redis, Elasticsearch, or GraphQL.
• Experience with Kubernetes, Helm, or Terraform.
• Understanding of caching strategies, messaging patterns, and high-load system design.
• Experience with performance tuning, monitoring (Prometheus/Grafana), and observability tools (ELK).

• Familiarity with ML/AI integrations or data pipelines.

   

We Offer

• Real-world projects in fintech, AI, telecom, and automation industries.
• Mentorship from senior engineers, tech leads, and architects.
• Personal development plan and a clear path toward Senior Java Engineer or Backend Architect roles.
• Access to internal workshops, best practices, and structured feedback.
• A collaborative engineering culture focused on transparency and continuous improvement.
• Long-term projects, flexible schedule, and a remote-friendly work environment.