Digital Assets Senior Backend Engineer Job at Citi (Tel Aviv)

Blockchain Senior Backend Engineer

Join Citi's Innovation Labs and leverage cutting-edge blockchain technology to r...

Location

Israel , Tel Aviv

Salary:

Not provided

Citi

Expiration Date

Until further notice

Requirements

A Bachelor's degree in Computer Science, Engineering, or a related discipline
8+ years of extensive experience in full software development and testing lifecycle, with deep expertise in Backend web development using Java Spring
An understanding of web3 infrastructure, blockchain technology, and digital assets, with a proven ability to develop web applications leveraging these technologies – advantage
Demonstrated experience developing high-performance web applications, adhering to best practices and patterns for reliability, scalability, and performance
Excellent computer science fundamentals, including data structures, algorithms, and design patterns, translated into elegant, working code
Familiarity with Agile Methodology and Scrum, and proficiency with collaborative tools for distributed team environments
Love coding and creating things, especially when people actually use your builds

Job Responsibility

Collaborate with a visionary team to implement next-generation web applications, harnessing the power of blockchain technology
Own and deliver end-to-end functional scope for applications leveraging blockchain, ensuring unparalleled quality and performance
Tackle complex engineering challenges, delivering innovative solutions that meet and exceed stakeholder expectations in the rapidly evolving digital assets landscape
Champion and apply best practices and cutting-edge design patterns for both enterprise and web3 applications, ensuring architectural excellence
Drive the proper use of collaborative tools and methodologies to manage and deliver high-impact work within a distributed, agile team
Contribute to and maintain high-quality technical documentation, fostering knowledge sharing and ensuring the longevity of our innovative solutions

What we offer

Competitive base salary and a comprehensive benefits package, including generous holiday allowance, private medical insurance, and employee assistance programs
A business-casual workplace with a hybrid working model (up to 2 days working at home per week)
A workplace where everyone feels comfortable coming to work as their whole self, where the best talent is energized to join, motivated to stay, and empowered to thrive

Fulltime

Senior Software Engineer - Ads

Rockbot is building the future of streaming media in businesses, and this role w...

Location

United States

Salary:

150000.00 - 205000.00 USD / Year

Rockbot

Expiration Date

Until further notice

Requirements

Broad knowledge of ad tech and the advertising landscape, programmatic advertising, and digital marketing trends
Good product sense and prior experience designing and launching product features
Exceptional ability to work with and refactor legacy code effectively, adapting to frequent requirement changes
Exceptional skill in debugging production issues, especially for ad impressions on remote devices
Exceptional familiarity with distributed backend systems in cloud environments, including databases, caching, and application code
Proficiency with integrating third-party software and REST APIs, even with challenging documentation or systems
Proficiency in JavaScript across legacy and modern Chromium browsers
Proficiency with SQL, data warehousing concepts, query optimization, data streaming, and role-based access control
Strong algorithmic thinking ability, particularly for developing ad fill optimization strategies
Ability to rapidly translate high-level product requirements into concrete full-stack prototypes and solutions

Job Responsibility

Architect and implement scalable solutions to support a growing number of users and advertising campaigns
Develop and maintain high-performance ad-serving systems to ensure reliable ad delivery
Build innovative ad products to simplify ad operations and streamline sales workflows
Collaborate with internal data platform teams to prototype and validate in-house tools for data analysis, algorithm automation, and data-driven decision-making
Collaborate with other teams and third-party services to seamlessly integrate the ad serving pipeline with relevance, targeting, bidding, and asset serving systems
Develop scalable data pipelines and systems to support ad measurement, ROI analysis, and revenue attribution
Continuously monitor and optimize system performance to identify and address bottlenecks, enhancing ad delivery efficiency

What we offer

equity
benefits

Fulltime

Senior Engineering Manager, Payments

Polygon Labs is a global blockchain payments company building and operating infr...

Location

United States

Salary:

Not provided

Polygon Labs

Expiration Date

Until further notice

Requirements

10+ years of experience in payments engineering, ideally spanning both traditional finance and digital assets
Proven experience managing senior engineering teams and building high-throughput, low-latency, mission-critical transaction systems
Deep expertise in designing microservices-based architectures, including service mesh and event-driven systems (e.g. Kafka, Axon, cloud-native pub/sub)
Proficient in one or more backend languages (Java, Go, Python) and frameworks like Spring Boot, with strong understanding of active thread management for synchronous flows
Experience with both synchronous and asynchronous integration patterns (REST, gRPC, pub-sub) for enterprise-scale partner integrations
Strong architectural understanding of cloud-native systems on AWS and/or GCP, including edge networking (e.g. CDN, API gateways) through to internal subnet topology
Hands-on experience with database and caching technologies including PostgreSQL, MongoDB, ElasticSearch, Redis, and Hazelcast
Solid understanding of data architecture patterns, including data lakes, data warehouses (e.g. Snowflake, Databricks) and event-based ingestion pipelines
Strong understanding of both centralized and decentralized payment infrastructure, including traditional rails (ACH, SEPA, card networks) and blockchain-based flows (wallets, custody, stablecoins)
Track record of delivering compliant, secure systems in regulated environments, with an understanding of KYC, AML, and other key controls

Job Responsibility

Lead the buildout of a modern payments application from the ground up, working closely with the Head of Payments Engineering
Manage and mentor engineers and DevOps teams focused on delivering scalable and reliable payment capabilities
Collaborate cross-functionally with Product, Compliance, and Infrastructure teams to define and deliver enterprise-grade payment solutions
Drive architecture and development across both fiat and blockchain-based payment systems
Instill a strong engineering culture focused on automation, ownership, security, and operational excellence
Stay ahead of the curve on blockchain innovation in the payments space and integrate emerging standards into the product roadmap

What we offer

Remote first global workforce
Industry-leading Medical, Dental and Vision health insurance
Company matching 401k with 3% match
$1,500 Home Office Set Up Allowance (lifetime max)
$75 Monthly internet or phone reimbursement
Flexible Time Off
Company issued laptop
Egg freezing, mental health, and employee wellness benefits

Fulltime

Senior Cloud Engineer - Crypto

As a Senior Cloud Engineer on Sokin’s Crypto team, you will architect, deploy, a...

Location

Serbia , Belgrade

Salary:

Not provided

Sokin

Expiration Date

Until further notice

Requirements

5+ years of professional cloud engineering experience, with at least 2 years in a fintech, payments, or other regulated industry
Proven track record of designing and managing production AWS infrastructure at scale
Hands-on experience with Terraform (or equivalent IaC) and CI/CD pipelines (GitHub Actions preferred)
Experience with containerisation and orchestration (Docker, Kubernetes, ECS/EKS)
Demonstrable experience building or operating blockchain node infrastructure and crypto-related cloud services
Proficiency in AWS with relevant certifications (AWS Solutions Architect Professional or equivalent strongly preferred)
Expertise in scripting and automation (Python, Bash)
Strong understanding of networking (VPC, subnets, VPN, load balancers, service mesh)
Knowledge of blockchain infrastructure — running nodes, RPC providers, on-chain data indexing, and wallet/key management systems
Understanding of stablecoin mechanics — minting/burning, settlement flows, liquidity management, and the major stablecoin protocols and issuers

Job Responsibility

Architect and deploy secure, scalable, and cost-optimised AWS infrastructure to support Sokin’s payments platform, stablecoin settlement services, and real-time transaction processing
Design high-availability, multi-region architectures that meet the latency and throughput demands of cross-border payment flows
Own the end-to-end infrastructure lifecycle — from capacity planning and provisioning through monitoring, optimisation, and decommissioning
Build and maintain blockchain node infrastructure (RPC endpoints, indexers, event listeners) required for on-chain settlement and stablecoin operations
Design and operate secure key management and custody infrastructure for blockchain wallets and transaction signing
Implement infrastructure for fiat on-ramp/off-ramp services, ensuring reliable connectivity between traditional payment rails and blockchain networks
Monitor blockchain node health, chain synchronisation, and mempool conditions to ensure transaction reliability
Develop and maintain IaC using Terraform to automate all infrastructure provisioning, configuration, and lifecycle management
Integrate cloud infrastructure with CI/CD pipelines using GitHub Actions, enabling seamless and repeatable deployments
Implement GitOps workflows and automated testing for infrastructure changes, including policy-as-code compliance checks

Fulltime

Senior Cloud Engineer - Crypto

As a Senior Cloud Engineer on Sokin’s Crypto team, you will architect, deploy, a...

Location

Serbia , Belgrade

Salary:

Not provided

Sokin

Expiration Date

Until further notice

Requirements

5+ years of professional cloud engineering experience
At least 2 years in a fintech, payments, or other regulated industry
Proven track record of designing and managing production AWS infrastructure at scale
Hands-on experience with Terraform (or equivalent IaC) and CI/CD pipelines (GitHub Actions preferred)
Experience with containerisation and orchestration (Docker, Kubernetes, ECS/EKS)
Demonstrable experience building or operating blockchain node infrastructure and crypto-related cloud services
Proficiency in AWS with relevant certifications (AWS Solutions Architect Professional or equivalent strongly preferred)
Expertise in scripting and automation (Python, Bash)
Strong understanding of networking (VPC, subnets, VPN, load balancers, service mesh)
Knowledge of blockchain infrastructure — running nodes, RPC providers, on-chain data indexing, and wallet/key management systems

Job Responsibility

Architect and deploy secure, scalable, and cost-optimised AWS infrastructure to support Sokin’s payments platform, stablecoin settlement services, and real-time transaction processing
Design high-availability, multi-region architectures that meet the latency and throughput demands of cross-border payment flows
Own the end-to-end infrastructure lifecycle — from capacity planning and provisioning through monitoring, optimisation, and decommissioning
Build and maintain blockchain node infrastructure (RPC endpoints, indexers, event listeners) required for on-chain settlement and stablecoin operations
Design and operate secure key management and custody infrastructure for blockchain wallets and transaction signing
Implement infrastructure for fiat on-ramp/off-ramp services, ensuring reliable connectivity between traditional payment rails and blockchain networks
Monitor blockchain node health, chain synchronisation, and mempool conditions to ensure transaction reliability
Develop and maintain IaC using Terraform to automate all infrastructure provisioning, configuration, and lifecycle management
Integrate cloud infrastructure with CI/CD pipelines using GitHub Actions, enabling seamless and repeatable deployments
Implement GitOps workflows and automated testing for infrastructure changes, including policy-as-code compliance checks

What we offer

Inclusive work environment
Agile, flexible working culture

Senior Java Engineer

We are looking for high-performing Java Backend Developers with strong expertise...

Location

Philippines , Makati City

Salary:

Not provided

Avaloq

Expiration Date

Until further notice

Requirements

5+ years of development experience preferred with a Bachelors degree in Software Engineering
Full-stack Java development experience (java 17+) including knowledge of common tooling such as Spring Boot and JPA, GraphQL, Liquibase, and Spring Security
Advanced proficiency RESTful API building
Knowledge of traditional software development processes and tools, including Git, Gradle and Jenkins CI tool, JIRA, Confluence, Code Reviews
Hands-on experience developing microservices using modern technologies such as Apache Kafka, REST APIs, containerization ( Kubernetes), and cloud-based infrastructure (AWS, Azure)
Testing frameworks: Junit, Mockito
Basic Linux operating system knowledge
Authentication and security over REST protocol

Job Responsibility

Develop and implement scalable and secure backend services for banking and digital assets
Collaboration with the Product Owner and Architect for specifications and design
Contribute to high-performance architecture and establish software design patterns
Lead development team, supporting individual grows and ensuring high quality of delivered solutions
Drive best coding practices and maintain high code quality through Unit and Integration tests
Conduct code reviews and mentor junior team members
Take ownership of key backend components and deliver robust solutions
Stay informed about emerging trends in banking technology, digital assets, and blockchain

What we offer

Annual bonus
Flexible working
Instant recognition
Access to Udemy for professional and personal learning

Fulltime

Senior Software Engineer - Java and NodeJS

The Backend Developer will be part of the Digital Technology Team. They are resp...

Location

United States , Irving

Salary:

Not provided

7-Eleven, Inc

Expiration Date

Until further notice

Requirements

Bachelors/ master’s degree in computer science or equivalent
Must have 8+ years of API / Server-side development experience (Programmer, Backend Services developers, Middleware developers, JavaScript(must), NodeJS, Java (Must), C#, Backend Services Developer, AWS, Lambda, ECS, Serverless, MongoDB, Document Storage modeling, RDBMS Storage modeling.)
Must have 4 years of experience in cloud platforms (preferable AWS: both traditional EC2 and serverless Lambda), developing micro-services, CI/CD solutions (including Docker), message queue systems and background task management
Must have 4 years of experience in developing NoSQL databases, designing data models and proficient in querying document stores (preferably MongoDB)
Knowledge in API security frameworks, token management and user access control including OAuth, JWT, Open API, etc
Must demonstrate strong programming skills in JavaScript and Java
Experience working with API Gateway, CDNs, API Performance testing, CI/CD pipelines and monitoring tools
Ability to work in an Agile / SCRUM environment
Self-directed with a start-up/entrepreneur mindset
Ravenous about learning technology and problem solving

Job Responsibility

Design APIs, develop shippable code, documentation and unit test new features for digital products
Works with fellow API Developers, Team Leads, Architects to deliver features through the creation of re-usable RESTful APIs
Collaborate with Quality, Product and Cloud Engineering teams to keep digital assets fully functional, secure and up to date with business needs
Perform pair programming, effectively communicate ideas with the team, assist in systems integration, performance testing and product releases
Implement policies, roles, data access controls, monitoring events, resolve system and data issues for continuous functioning of APIs

Fulltime

Digital Software Engineer Senior Analyst – Assistant Vice President

The Digital S/W Engineer Sr Analyst is a seasoned professional role. Applies in-...

Location

India , Chennai

Salary:

Not provided

Citi

Expiration Date

Until further notice

Requirements

8 years in a product development/product management environment
Design, develop, test, and maintain Java-based applications using object-oriented principles and best practices
Develop backend components using Core Java, Java EE, Spring / Spring Boot frameworks
Build and consume RESTful APIs for integration with frontend and third-party systems
Write clean, scalable, and well-documented code following coding standards
Strong analytical and quantitative skills
Data driven and results-oriented
Experience delivering with an agile methodology
Experience in affecting large culture change
Experience leading infrastructure programs

Job Responsibility

Accountable for executing and driving mid-size feature application design and development efforts to completion, serving as a development lead on medium-scale projects and supporting the execution of larger efforts
Proficient at operating with considerable autonomy and discretion as you will significantly influence the way an application is designed and developed by providing subject specific expertise and an advanced level of understanding of application programming principles
Sought after due to ability to analyze and troubleshoot coding, application performance and design challenges
Capable of research in root cause of development and performance concerns as well as the resolution of defects
Have a deep understanding of the technical requirements for the solutions being built
Understand engineering needs including those required to build, maintain, and operate the system through all phases of its life
Proficient in information modeling, data structures and algorithms
Understand maintenance characteristics, runtime properties and dependencies that exist in support of your system’s software
Demonstrate an advanced understanding of supported main system flows and possess a comprehensive understanding of how the system and others collectively integrate to contribute towards achieving business objectives
Participate in design discussions as a Development Lead and as such will play the part of a key decision maker in driving design decisions

Fulltime

Digital Assets Senior Backend Engineer

Citi

Location:
Israel , Tel Aviv

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:
September 17, 2025

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Location:Israel , Tel Aviv

Category:IT - Software Development

Contract Type:Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:September 17, 2025

Looking for more opportunities? Search for other job offers that match your skills and interests.

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Location:
Israel , Tel Aviv

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Contract Type:
Not provided

Job Posted:
September 17, 2025