Senior Blockchain Engineer Job at Groma (MA) (Boston)

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 Security Engineer, Blockchain

Join us in building the future of finance. Our mission is to democratize finance...

Location

United States , Menlo Park

Salary:

187000.00 - 220000.00 USD / Year

Robinhood

Expiration Date

Until further notice

Requirements

4+ years of experience conducting cyber security assessments
3+ years of experience engineering security solutions
2+ years of experience specializing in assessing and securing blockchain applications and infrastructure
Deep understanding of blockchain technologies, protocols, exploits, and frameworks and associated security risks
Security domain knowledge across many cyber security disciplines
Outside-the-box thinking (adversary mentality)
Experience communicating effectively with technical/non-technical and executive-level audiences
Working knowledge of Go or Python for interacting with security tooling APIs

Job Responsibility

Perform proactive assessments covering infrastructure, secure and resilient architecture, data security (including privacy), identity and access management, application and product security for our Crypto business
Prioritize and drive the reduction of discovered security issues, vulnerabilities, and risks by partnering with the business to provide recommendations and solutions
Work with technical leads to develop strategies, programs, systems and tools that enhance our approach in keeping our products, data, and customers safe and secure
Collaborate with partner security teams to help safeguard Robinhood’s data and infrastructure
Provide technical expertise on Robinhood’s Security and Privacy solutions, policies, procedures, and standards
Stay up to date on the direction of emerging security, privacy, blockchain technologies, and industry trends

What we offer

Performance driven compensation with multipliers for outsized impact, bonus programs, equity ownership, and 401(k) matching
100% paid health insurance for employees with 90% coverage for dependents
Lifestyle wallet - a highly flexible benefits spending account for wellness, learning, and more
Employer-paid life & disability insurance, fertility benefits, and mental health benefits
Time off to recharge including company holidays, paid time off, sick time, parental leave, and more
Exceptional office experience with catered meals, events, and comfortable workspaces

Fulltime

Scala Backend Software Engineer, Senior / Lead

To sustain the company's growth, Ledger is looking for new talents. You will sta...

Location

France , Paris

Salary:

Not provided

Ledger

Expiration Date

Until further notice

Requirements

Experienced engineer and continuous learner with 6+ years of relevant engineering experience
2+ years of technical leadership experience, including effective communication of complex concepts and cross-team coordination to ship critical products
Advanced Scala proficiency
expert-level proficiency, and advanced mastery of a second backend language (e.g., Rust, Java, Python, PHP) is a plus
Excellent collaboration and communication skills
Experience collaborating closely with QA, product management, and key stakeholders to develop and deliver on a shared vision
Led development of complex, high-performance interactive browser applications, including architecture, infrastructure, and optimization
Experience with various web architecture patterns (e.g., Microservices, Event-Driven, P2P)
Ability to apply and adapt software engineering best practices to the engineering environment
Experience in the Web3 ecosystem and in a project involving blockchain fundamentals

Job Responsibility

Develop and maintain high-performance, resilient microservices and APIs to power Ledger's products, including integrations with staking, yield, DeFi services, and blockchain explorers
Contribute to the architecture, design, and implementation of scalable solutions, proactively identifying and addressing technical challenges
Ensure software quality through testing, documentation, and performance optimization, including monitoring and alerting systems
Enhance and maintain CI/CD pipelines to secure and streamline deployment workflows
Provide technical leadership and mentorship, collaborating across teams to deliver impactful projects and improve engineering standards
Drive innovation by identifying opportunities for improvement, contributing to a shared knowledge base, and participating in technical outreach
Manage projects effectively, respecting deadlines, priorities, and deliverables.

What we offer

Equity: Employees are the foundation of our success, and we award stock options so you can share in that success as we grow
Flexibility: A hybrid work policy
Social: Annual company outing for Ledgerdary Days, plus frequent social events, snacks and drinks
Medical: Comprehensive health insurance policy offering extensive medical, dental and vision care coverage
Well-being: Personal development, coaching & fitness with our dedicated partners
Vacation: Five weeks of paid leave per year, in addition to national holidays and rest & relaxation (RTT) days
High tech: Access to high performance office equipment and gadgets
Transport: Ledger reimburses part of your preferred means of transportation
Discounts: Employee discount on all our products.

Fulltime

Senior Rust Software Engineer

Serokell is a fast-growing, fully remote software development company that works...

Location

Salary:

Not provided

Serokell

Expiration Date

Until further notice

Requirements

3+ years of experience with Rust
Solid knowledge of Rust’s basics: type system, generics, lifetimes, std, serde, logging, error handling, project organisation and structure
Extensive experience with Rust’s async ecosystem (tokio, futures, streams)
Experience writing and running unit tests, integration tests
Strong grasp of computer science fundamentals, including algorithms, data structures, and concurrent programming
Knowledge of computer networks: HTTP, TCP/IP stack, understanding of poll- and push-based data synchronisation models and their usage in modern service APIs
Fluent spoken and written English

Job Responsibility

Develop robust, scalable, and maintainable Rust applications, adhering to best practices and coding standards
Participate in code reviews, providing constructive feedback and ensuring code quality
Debug and resolve technical issues, identifying and implementing effective solutions

What we offer

Competitive salary
Attractive international projects
Participation in the leading world conferences
International teams and multicultural environment
Fully remote work and flexible working hours
Possibility to take days off whenever you need
Investment in your professional and career growth, which will correspond to wage growth
Mentoring and training
Therapy sessions to support your well-being
Opportunity to contribute to one of the functional programming industry’s leading blogs

Senior Protocol Engineer

We're seeking a Senior Protocol Engineer to join the Protocol team. You’ll play ...

Location

United States

Salary:

200000.00 - 230000.00 USD / Year

Magic

Expiration Date

Until further notice

Requirements

5+ years as a Full‑Stack Engineer or equivalent experience, with a focus on: Protocol: Production-grade Rust services (5+ years)
EVM: Solidity (2+ years)
Proven track record at scale - building high‑traffic, low‑latency systems (e.g., handling tens of millions of user requests)
Strong proficiency with blockchain fundamentals (EVM – i.e memory/storage, gas model), and understanding of core EIPs on EVM
Strong system design skills for efficiency and scalability of the system
Experience of working on building blockchain protocols (L1, L2s, bridges, oracle networks, relayers, bundlers, solvers, etc.)
Strong understanding of security best practices both in Rust based systems and Solidity contracts
Excellent communication, mentorship, and autonomous execution at a senior engineering level
Proficiency with AI coding tools (Copilot, Cursor, Claude code, etc.)

Job Responsibility

Architect and implement protocol features end-to-end. From building protocol level features in Rust to developing middleware contracts in Solidity
Build, optimize, and scale services and contracts
Work closely with product and security teams (internal + external) to ensure our systems and contracts meet our security standards
Lead and collaborate as appropriate with other engineers, drive code reviews, set best practices for maintainable, scalable architecture

What we offer

Remote-first culture with flexible working hours
Stock options and token grants
99% company-paid medical*, dental and vision insurance
100% company-paid life and disability insurance
401(k) plan (US) or pension plan (CAN)
$3,600 annual reimbursement for remote work, wellness, and professional development
Flexible time off
Up to 12 weeks of paid parental leave

Fulltime

Digital Assets Senior Backend Engineer

Senior Backend Engineer role at Citi's Innovation Labs working on the Citi Integ...

Location

Israel , Tel Aviv

Salary:

Not provided

Citi

Expiration Date

Until further notice

Requirements

Bachelor's degree in Computer Science, Engineering, or related discipline
8+ years of experience in full software development and testing lifecycle
Deep expertise in Backend web development using Java Spring
Understanding of web3 infrastructure, blockchain technology, and digital assets
Experience developing high-performance web applications
Excellent computer science fundamentals including data structures, algorithms, and design patterns
Familiarity with Agile Methodology and Scrum
Proficiency with collaborative tools for distributed team environments

Job Responsibility

Collaborate with team to implement next-generation web applications using blockchain technology
Own and deliver end-to-end functional scope for blockchain applications
Tackle complex engineering challenges in digital assets landscape
Apply best practices and cutting-edge design patterns for enterprise and web3 applications
Use collaborative tools and methodologies in distributed agile team
Contribute to and maintain high-quality technical documentation

What we offer

Competitive base salary
Comprehensive benefits package
Generous holiday allowance
Private medical insurance
Employee assistance programs
Hybrid working model (up to 2 days working at home per week)
Inclusive workplace environment

Fulltime

Senior Platform Engineer

As a 0x Platform Engineer, your mission is to ensure our suite of products remai...

Location

United States

Salary:

Not provided

0x

Expiration Date

Until further notice

Requirements

Bachelor’s degree in Computer Science, Engineering, or equivalent experience
5+ years of professional engineering experience with a strong background in platform or infrastructure engineering
Proficiency with infrastructure automation and scripting (TypeScript or Rust preferred)
Strong expertise in Kubernetes-based applications in cloud environments (EKS preferred)
Experience with AWS and Infrastructure as Code (Terraform)
Advanced understanding of modern DevOps practices (GitOps, CI/CD, OpenTelemetry)
Proven ability to troubleshoot distributed systems, networking, and latency issues in production environments
Obsessed with optimizing for low latency, high throughput, and developer productivity
Passion for decentralization and alignment with the 0x mission
Embody our core values: do the right thing, consistently ship, and create enduring value

Job Responsibility

Ensure uptime, reliability, and resilience across 0x’s core products and services
Own and improve our observability stack (Grafana, Loki, Tempo, VictoriaMetrics), driving efficiency and actionable insights
Design and implement resilient systems for low-latency, high-availability workloads
Automate engineering workflows including onboarding/offboarding, service provisioning, and infrastructure migrations
Manage and upgrade cloud infrastructure and Kubernetes platforms while ensuring scalability and high availability
Optimize build systems and CI/CD pipelines to improve developer velocity and performance
Collaborate across application, data, and infrastructure teams to debug issues, reduce latency, and drive cross-team automation

What we offer

Comprehensive insurance (medical/dental/vision/life/disability) for U.S.-based employees — 100% of base plan covered for you and dependents
401k and FSA for U.S.-based employees
Monthly mobile phone bill, wellness, and pre-tax transportation expense
Covered mental health benefits (included professional therapy sessions)
A supportive remote environment
Lunch reimbursement for all employees across the globe
Stipend for your ideal remote / WFH set-up: headphones, and any other work gear you may need
12-week paid parental leave
Great office conveniently located in the SF Financial District for those in the region
Flexible vacation: Take time when you need it (and we really mean it)

Fulltime

Senior Protocol Engineer

Chainway Labs is seeking a Senior Protocol Engineer to join our team at Citrea, ...

Location

Salary:

Not provided

Chainway Labs

Expiration Date

Until further notice

Requirements

A minimum of 5 years of hands-on experience in protocol development
Proficiency in Rust
Exceptional communication skills in English, both written and spoken
An aptitude for quick thinking, problem-solving, and clearly and effectively expressing solutions
'That Guy' or 'That Gal' Mindset: We value individuals who exhibit a proactive approach to tasks and challenges, fearlessly conquering any obstacles in their path

Job Responsibility

Design, develop, and maintain cryptographic protocols for Citrea’s rollup and bridge architecture
Collaborate with engineering and product teams to ensure seamless protocol integration
Build and optimize core bridge components such as state proof generation, verifier binaries, and signature collection
Ensure scalability, security, and performance across the bridge and rollup infrastructure
Lead testing efforts to validate protocol correctness and bridge reliability

What we offer

Competitive compensation package, including equity options
Remote work setting
Engaging community activities that foster team bonding and collaboration
A welcoming atmosphere where every team member's opinion is valued
A dynamic team environment filled with bright, young, and dedicated colleagues, offering an enriching collaborative experience

Fulltime

Senior Blockchain Engineer

Groma (MA)

Location:
United States , Boston

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:
December 08, 2025

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Senior Blockchain Engineer

Groma (MA)

Location:United States , Boston

Category:IT - Software Development

Contract Type:Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:December 08, 2025

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Location:
United States , Boston

Category:
IT - Software Development

Contract Type:
Not provided

Job Posted:
December 08, 2025