Hire the Top 2% of
Freelance Java Card Developers

Viswanathan S.

Java Card developer in the United States (UTC-5)

Experienced professional with expertise in banking & finance industry, collaborating with prominent clients such as Visa Inc., American Express, First Data, BofA & RBS. · Proven experience driving strategic growth, fostering C-level relationships, and leading large engagements (~50MM) with strong focus on analytics using AI/ML & innovation. Excellent team builder with expertise on enterprise architecture, data architecture, product delivery, & technology leadership. · Drive digital adoption & transformation in FinTech. Act as an ambassador repositioning company as a strategic partner, with significant transformation propositions & engagements with large clients. · Focus on growth initiatives by collaborating with leadership & sales teams to execute a targeted strategy for expanding Cards & Payments business. Successfully increased portfolio revenue by 28% focusing on new growth areas whilst leveraging both existing and emerging capabilities. · Well-versed in PDLC & SDLC methodologies such as Waterfall, Agile (SCRUM & KANBAN), and estimation techniques like Poker planning, SMC, FP, & a Certified Scrum Master. · Proficient in Identity and Access Management (IAM), including LDAP, SSO, Token-based authorization, MFA, RBAC, OAuth and other authentication systems. · Knowledge of enterprise applications utilizing APIs, SOAP, RESTful services, Kafka pipelines, with strong proficiency in Product Increment Planning (PIP), Quarterly Business Reviews (QBR) and review Quarterly Execution Plans (QEP). Hands on experience in infra provisioning & Disaster recovery. · Design automation solutions using AI/Machine Learning & custom tools, MDM for Data Migration & Mergers and automate ETL across Big Data and RDBMS elevating data quality during ingestion by 35%. · Hands on expertise in Data Ingestion, processing & storage, Data access & distribution, Analytics and governance, data security and privacy controls, data quality, profiling, monitoring and BI. · Architect, design & optimize high availability databases, collaborating closely with developers & DBAs to enhance capacity and resource management for on perm and cloud (AWS & Google Cloud) · Develop enterprise applications utilizing APIs, Python, SOAP, RESTful services, Java, JWS, JMS, Kafka pipelines, with strong proficiency in JSON/XML/XSLT and SOA. · Own continuous improvement in technology, plan for increased capacity & performance, design new products and initiatives in line with enterprise architectural standards · Run ARB (Architecture review board discussions), participate in platform team’s front door and architecture reviews, collaborate with dependent technical teams & security architecture teams

Eugene S.

Vetted Java Card developer in the United States (UTC-5)

With a strong IT engineering and software architecture background, I have led multiple high-impact teams across roles in the financial, fintech, and wellness sectors in my 25 years of experience which include 10 years of Software architecture and solid background in payment systems. His responsibilities include being part of the architectural board, guiding enterprise-wide standards, and collaborating closely with stakeholders to ensure efficient, high-performing solutions, overseeing third-party integrations, and setting coding and architectural standards. He also promoted continuous learning by organizing company-wide Hackathons and Lunch-and-Learn sessions. Technologies include Java, Spring Boot, Kafka, and Oracle databases in PCF.

Chris R.

Vetted Java Card developer in the United States (UTC-5)

Over the last 15 years, I've worked as a teacher, a support engineer, a data engineer, and a software engineer. In all that time, the most engaging and satisfying work was always helping other people learn and overcome challenging issues. I have professional experience with the following languages/technologies: * Python * Java * Bash * Web (HTML, CSS, JavaScript/TypeScript) * SQL (multiple dialects) * Korn * Perl * C * Android * Docker * Linux * Git I've developed everything from simple scripts that automate repetitive tasks, to ETL pipelines, to full stack web applications (the API and backend services, as well as the HTML/CSS/JavaScript frontend), and along the way I've mentored engineers, students, and non-technical people wanting to level up their skills.

priyansh N.

Vetted Java Card developer in Germany (UTC+2)

Architect with experience of 8+ years in Frontend +Backend+big data I Have worked across various domains in my career did freelancing as well as worked for top product based companies I have expertise in payment, Ecommerce, Banking domain as well as i have knowledge of building enterprise web application and Windows , Linux native applications which can scale at high level I am java certified professional and I am having below mentioned certificates • Java Certified- Oracle certified java developer • Web component certified -Oracle Certified Web Component developer • Certified Spring boot and Aws architect. My experience is vastly distributed across technologies, such as: • Backend Solutions System Designing ,Complex application designs ,Data structure and algorithm,Architecturing Test Driven development,Team management,Windows native application,Web Applications • Tools and Tech: Language: Java ,Golang, Kotlin , Python ,Typescript,Javascript,Ruby Data base: Cassandra, Mongo-Db,Postgresql,CouchBase,MySql,Oracle,Sql and Plsql Caching: Redis,MemCache, Framework: Hibernate,Spring Jpa, Spring boot,React-Go,Dynamo-Db,Spring-Cloud,Spring-Mvc CI/CD: Jenkins, Aws-Codecommit, BitBucket, AzureDevops, Continuous Delivery Cloud: Aws and Azure Messaging-Queue: Kafka,Aws-msk,Azure-EventHub Architecture: Microservices,EventDriven,Monolithic,Windows native application Have knowledge of concurrency and event driven systems . • Front End Technologies JavaScript, jQuery, Angular 2, Typescript,React ,Es6,npm,web pack, grunt • Hadoop Ecosystems Spark, scala, hdfs ,Mapreduce,Hadoop,scoop,hive,

Shahzada R.

Java Card developer in Bangladesh (UTC+6)

As a leader in fintech and technology, I bring over a decade of innovation and strategic growth to every project. My expertise spans the development of web and mobile applications, SaaS products, payment gateways, and high-end custom software solutions. With a proven background in fintech and payments, I have been instrumental in guiding teams to deliver cutting-edge solutions that drive business success. **What I Offer:** * Comprehensive experience in building and maintaining scalable and secure applications * Expertise in integrating complex payment systems and enhancing transaction efficiency * Proven track record in leading digital transformation projects and improving financial services * Strong understanding of cryptography and security protocols to safeguard data integrity

Juan G.

Java Card developer in Colombia (UTC-5)

My name is Juan, and I'm Juan in a million :) I enjoy to have challenges in my daily life so for that reason I learned to code almost 17yrs ago. I've made software for Bash, Desktop, Web, and Mobile for many types of projects. I started learning Objective-C around 12yrs ago when I decided to focus on creating mobile apps. Currently, I make Android apps most of the time for companies in the USA from Medellin, Colombia. However, I love to explore new mobile technologies in my side projects, and if I had the opportunity, I would like to release more things as open source to my Github profile like a contact-tracing PoC with Bluetooth that I did some months during the Pandemic.

Relu D.

Vetted Java Card developer in Romania (UTC+2)

Backend software engineer with 4+ years of experience in Java and distributed systems architectures.

Joydip K.

Vetted Java Card developer in Ireland

I have 13+ years of experience with software development and is a seasoned technical architect who has wide experience working with various clients in industry like finance , public sector , federal , trasport domain etc in US and Europe region . I have knowledge on e-commerce,Integration and Cloud. Expertised in leading the design, implementation and integration of software packages in MicroService Architecture using Spring Boot and AWS . Certified AWS Solutions Architect and in love with containerization using Docker and Kubernetes. I love to mentor my team and I'd like to expand this to CodeMentor. Let me know how i can help!

Sarabjeet S.

Java Card developer in India (UTC+6)

Hello! I’m Sarabjeet, an Android Solutions Architect and Payment Gateway Specialist with over 13 years of experience in mobile application development, Java, JavaCard, and EMV technologies. My background spans end-to-end Android solutions, integrating secure payment gateways, and creating robust systems that comply with EMV standards, allowing me to support clients in developing scalable and secure payment solutions. My technical expertise includes: • Android Development: Building and optimizing Android applications tailored for performance, user experience, and functionality. • Payment Gateway Integration: Implementing and customizing payment systems with a strong focus on security, reliability, and compliance. • Java & JavaCard Development: Leveraging advanced Java capabilities to create flexible and efficient applications, including secure elements through JavaCard for smart card and chip-based applications. • EMV Expertise: Extensive knowledge in EMV technology, enabling secure transactions for credit and debit card processing. I’m dedicated to delivering high-quality work with a commitment to secure, user-friendly, and efficient solutions. Whether you need a mobile app, secure payment integration, or consulting on EMV and JavaCard, I’m here to help bring your project to life. Let’s discuss how I can contribute to your success!

Dharmendra M.

Vetted Java Card developer in India (UTC+6)

Dedicated and seasoned Backend Engineer with a proven track record of designing, building, and optimizing Scalable server-side applications. Over 13 years of experience in software development, I am driven by a passion for crafting robust, high-performance systems that drive business success. Seeking a challenging role where I can leverage my expertise in backend development, distributed systems, and problem-solving to contribute to the growth and innovation of a dynamic organization. My goal is to continue pushing the boundaries of technology to deliver elegant, efficient, and reliable solutions that meet and exceed user expectations.