Senior Software Development Engineer II ( SDE II )

✨ Develop & customize IBM Sterling OMS

✨ Build/consume REST APIs using Java & Spring Boot

✨ Work on OMS workflows, integration & order lifecycle

About the Role

At Ceryneian, we’re building a next-generation, research-driven algorithmic trading platform aimed at democratizing access to hedge fund-grade financial analytics. Headquartered in California, Ceryneian is a fintech innovation company dedicated to empowering traders with sophisticated yet accessible tools for quantitative research, strategy development, and execution.

Our flagship platform is currently under development. As a Backend Engineer, you will play a foundational role in designing and building the core trading engine and research infrastructure from the ground up. Your work will focus on developing performance-critical components that power backtesting, real-time strategy execution, and seamless integration with brokers and data providers. You’ll be responsible for bridging core engine logic with Python-based strategy interfaces, supporting a modular system architecture for isolated and scalable strategy execution, and building robust abstractions for data handling and API interactions. This role is central to delivering the reliability, flexibility, and performance that our users will rely on in fast-moving financial markets.

We are a remote-first team and are open to hiring exceptional candidates globally.

Core Tasks

·      Build and maintain the trading engine core for execution, backtesting, and event logging.

·      Develop isolated strategy execution runners to support multi-user, multi-strategy environments.

·      Implement abstraction layers for brokers and market data feeds to offer a unified API experience.

·      Bridge the core engine language with Python strategies using gRPC, ZeroMQ, or similar interop technologies.

·      Implement logic to parse and execute JSON-based strategy DSL from the strategy builder.

·      Design compute-optimized components for multi-asset workflows and scalable backtesting.

·      Capture real-time state, performance metrics, and slippage for both live and simulated runs.

·      Collaborate with infrastructure engineers to support high-availability deployments.

Top Technical Competencies

·      Proficiency in distributed systems, concurrency, and system design.

·      Strong backend/server-side development skills using C++, Rust, C#, Erlang, or Python.

·      Deep understanding of data structures and algorithms with a focus on low-latency performance.

·      Experience with event-driven and messaging-based architectures (e.g., ZeroMQ, Redis Streams).

·      Familiarity with Linux-based environments and system-level performance tuning.

Bonus Competencies

·      Understanding of financial markets, asset classes, and algorithmic trading strategies.

·      3–5 years of prior Backend experience.

·      Hands-on experience with backtesting frameworks or financial market simulators.

·      Experience with sandboxed execution environments or paper trading platforms.

·      Advanced knowledge of multithreading, memory optimization, or compiler construction.

·      Educational background from Tier-I or Tier-II institutions with strong computer science fundamentals, a passion for scalable system design, and a drive to build cutting-edge fintech infrastructure.

What We Offer

·      Opportunity to shape the backend architecture of a next-gen fintech startup.

·      A collaborative, technically driven culture.

·      Competitive compensation with performance-based bonuses.

·      Flexible working hours and a remote-friendly environment for candidates across the globe.

·      Exposure to financial modeling, trading infrastructure, and real-time applications.

·      Collaboration with a world-class team from Pomona, UCLA, Harvey Mudd, and Claremont McKenna.

Ideal Candidate

You’re a backend-first thinker who’s obsessed with reliability, latency, and architectural flexibility. You enjoy building scalable systems that transform complex strategy logic into high-performance, real-time trading actions. You think in microseconds, architect for fault tolerance, and build APIs designed for developer extensibility.

• Software Engineering
  • Design and develop highly scalable, available, reliable, secure and fault tolerant systems with minimal guidance for a market leader in the logistics industry
  • Partner with team members on functional and nonfunctional requirements and spread design philosophy, goals and improve the code quality across the team
  • Research new technologies and tools that enable building the next generation of our services
  • Provide technology leadership to the team and foster engineering excellence
• Product Delivery
  • Partner with product managers to define and execute on the feature roadmap
  • Translate business requirements into scalable and extensible design
  • Coordinate with various cross functional teams on planning and execution
  • Maintaining automated build / test / deployment environments

• Software Engineering
  • Should have at least 3 years of hands-on experience in designing, developing, testing and deploying applications on Java, Ruby, Kotlin, Python, Node or Go for large scale applications
  • Deep knowledge of one of the programming languages they have experience in
  • Proficient in OOP and Design Patterns, experience with functional programming would be a plus
  • Data modelling experience in Relational Databases
  • Ability to design and implement low latency RESTful services
• Product Delivery
  • Ability to scope, review and refine user stories for technical completeness and to alleviate dependency
  • Well versed in working with agile methodologies which includes phases such as design, development, code review, testing and release management
  • Ability to have worked in a CI/CD environment, with hands on experience with Git or any similar source code management tools
• Product Maintenance

• Experience troubleshooting server performance issues such as memory tuning, GC tuning, resource leaks
• Continuously refactor applications to ensure high quality design

About the Role

We are seeking a passionate and skilled Java + Kotlin Developer to join our growing engineering team. You’ll be responsible for building scalable backend systems and modern Kotlin-based applications, with opportunities to work on both Android and server-side development.

What You'll Do

• Develop and maintain robust backend services using Java and Spring Boot
• Design and implement modern applications using Kotlin (Android or Multiplatform)
• Work on APIs, microservices, and system integrations
• Collaborate with cross-functional teams in an Agile environment
• Write clean, maintainable, and testable code

Key Requirements

• 3+ years of hands-on experience with Java and Kotlin
• Strong grasp of Spring Boot, REST APIs, and microservices architecture
• Experience with Android Development or Kotlin on JVM
• Familiar with Git, Gradle, and CI/CD tools
• Bonus: Experience with Jetpack Compose, Kotlin Coroutines, or Kotlin Multiplatform

Good to Have

• Familiarity with cloud platforms like AWS / GCP
• Knowledge of Docker, Kubernetes, or DevOps practices
• Previous experience in a startup or fast-paced product environment

Required Skills:

• ASP.NET, C# .NET, SQL, Web API
• jQuery, JavaScript

Your day-to-day responsibilities include:

• Technically lead a team of 6-8 .NET developers
• Understands the requirement assigned for the development
• Performs the unit testing 
• Resolves bugs assigned, withing SLA time.
• Perform day to day activities of agile methodology
• Leads Daily Huddle & Scrum meeting.
• Takes responsility of CR developmet with all tasks included for it.
• Should perform code review whenever required

Net Developer & API Expert

Position Summary:

We are looking for .Net Developers who are also Experts in API Integrations to join our development team and participate in different established projects.

We are looking for proactive, team players who are passionate about programming in this language and focused on providing the best experience to the end user.

This is an excellent opportunity for those professionals looking to develop in one of the fastest growing companies in the industry! These developers will face numerous technical challenges.

Essential Functions and Responsibilities:

·      Work on projects in the C#, .NET CORE and entity frameworks

·      Validate data with Postman, JSON, and basic SQL queries

·      Unit Testing

·      Write RESTful APIs (Core Web API)

·      Writing clean/maintainable code

·      MSSQL Server (Familiar with MongoDB, preferred but not required)

·      Understand best practices and commit to follow them

·      Work on new and difficult topics and contribute to libraries when needed

Knowledge, Skills, and Abilities:

·      Fluent in English

·      Strong knowledge of OOPs concepts

·      Knowledge of the Linux Operating System

·      Strong problem-solving, design, coding and debugging skills.

·      Knowledge about Git and Version Control

·      Preferred to have knowledge of Microservices Architecture (Not mandatory)

• Experience working on large enterprise application integrations. Deep understanding and delivering solution using common messaging patterns
• Experience with Enterprise Service Bus/Azure Service Bus preferred
• Deep understanding and experience with agile development practices, including unit testing and continuous integration.
• Willingness to take on additional responsibility to ensure team success and quality solutions.
• Team player that understands how your own work is important to the team's success.
• Ability to multitask across different projects.
• Become a partner and trusted advisor to the internal development team on best-fit technologies and best practices.
• Familiarity with object serialization to one of the following: XML, JSON, BSON.
• Database development skill using SQL Server a must.
• A deep understanding of the .NET platform.
• Experience with the ASP.NET MVC. C#, JavaScript, Microservices, Web API, WPF
• Exposure to an ORM such as Entity Framework or NHibernate or equivalent implementation.
• Windows server and Azure development experience
• Queuing experience using MSMQ (or equivalent).
• Development experience using HTML5/CSS/JavaScript frameworks such as AngularJS or Ember or equivalent.
• Professionalism to include written and oral communication and the ability to communicate collaboratively in front of a whiteboard. An ability to understand your audience and adjust your communication style appropriately.
• A desire to constantly learn and share new knowledge
• A caring attitude – care about what you do, who you do it with, and how you’re going to be successful in the end.
• 10+ yrs. professional software development experience.
• Solid working knowledge of four or more of the following technologies:
• Authoring APIs compliant with REST standards
• Development using HTML5/CSS/JavaScript frameworks such as AngularJS or Ember or equivalent
• Development using Silverlight or WPF JQuery

• Designing, developing, implementing, and releasing high quality custom software solutions.
• Applying the very best technical agile patterns and practices when building custom software solutions.
• Collaborating with customers to provide technical consultation and assistance when required.
• Working with CTO, Software Development Manager and Architect, but will be expected to work independently on complex, non-routine tasks and projects. You may interact with end-users and other technical personnel to identify and correct issues.
• Maintaining continuous, open, consistent professional communication with peers and team members. Openly listen to others and confirm understanding to ensure everyone is on the same page.
• Working closely with team members on quality-related activities.