Sr. Back-End Engineer Job at 80Twenty (San Francisco)

Engineer Sr Analyst

The Engineer Sr Analyst is an intermediate-level position responsible for a vari...

Location

India , Chennai; Pune

Salary:

Not provided

Citi

Expiration Date

Until further notice

Requirements

7+ years of experience in Java full stack software development, with a focus on enterprise-level applications
Proven experience developing and deploying applications using the specified technology stack (Spring Boot, Angular, MongoDB)
Experience working in a regulated environment, preferably in the financial services or banking industry
Experience with CI/CD pipelines and tools (e.g., Jenkins, GitLab CI/CD, Maven/Gradle)
Backend: Expert proficiency in Java and the Spring Boot framework
Frontend: Strong expertise in Angular (version 2+), TypeScript, HTML5, and CSS3
Database: Hands-on experience with MongoDB, including schema design, query optimization, and performance tuning
Strong understanding of RESTful APIs, microservices architecture, and version control systems (Git)
Experience working in Financial Services or a large complex and/or global environment
Consistently demonstrates clear and concise written and verbal communication

Job Responsibility

Design, develop, and maintain both front-end and back-end components of the platform & services provisioning automation framework
Build dynamic and responsive user interfaces using Angular, ensuring a seamless and intuitive user experience
Develop scalable and secure back-end microservices using Spring Boot, with a strong focus on RESTful API development and integration
Design and manage database schemas and queries in MongoDB, optimizing for performance and data integrity
Act as a technical subject matter expert (SME) for the framework, providing guidance and mentorship to junior developers
Lead requirements gathering discussions with business stakeholders and product owners to translate business needs into technical specifications
Coordinate with the QA team to ensure rigorous testing and quality assurance throughout the development process
Timely analyze and troubleshoot user issues and incidents as a development SME, providing root cause analysis and implementing effective resolutions
Participate in code reviews to ensure code quality, adherence to best practices, and security standards
Proactively identify and address technical debt and performance bottlenecks within the application

Fulltime

Sr. Full-Stack Engineer, Product

We’re looking for an experienced product-focused full-stack engineer to join our...

Location

United States

Salary:

175000.00 - 215000.00 USD / Year

Zora

Expiration Date

Until further notice

Requirements

4+ years of experience as a software engineer working on user-facing or product-centric systems
Strong experience building both front-end applications at scale (React, React Native, Next.js, TypeScript) and back-end systems & APIs (Node/TypeScript, GraphQL, or similar)
Ability to move fluidly across the stack: Front-end (React/React Native), Back-end (TypeScript/Node, GraphQL, Python), Smart contracts or on-chain logic (Solidity) — or a willingness to learn
A strong product sense and a user-first mindset
Comfort owning features from ideation through implementation and production support
Familiarity with or desire to learn crypto/web3 concepts
Desire to stay current with modern software best practices across full-stack development
MUST be located in a US Time Zone

Job Responsibility

Build and continuously improve trading-related features across web, mobile, backend services, and on-chain components
Design, build, and maintain APIs, services, and user interfaces that support high-scale trading and creation experiences
Own projects end-to-end—from system design to implementation, testing, rollout, and post-launch iteration
Work closely with PMs and Designers to shape product direction and ensure user needs are kept at the center
Participate in code reviews, RFCs, technical design discussions, and architecture planning
Collaborate with engineers across the stack, contributing wherever the product needs you most
Participate in on-call rotation and help maintain reliability of core trading surfaces
Communicate clearly with cross-functional stakeholders on status, risks, and milestones

What we offer

Remote-First Culture: Work from anywhere in the world!
Competitive Compensation: Including salary, pre-IPO stock options, token compensation, and additional financial incentives
Comprehensive Benefits: Robust healthcare options, including fully covered medical, dental, and vision for employees
Retirement Contributions: Up to 4% employer match on your 401(k) contributions
Health & Wellness: Free memberships to One Medical, Teladoc, and Health Advocate
Unlimited Time Off: Flexible vacation policies, company holidays, and recharge weeks to prioritize wellness
Home Office Reimbursement: To cover home office items, monthly home internet, and monthly cell phone (if applicable)
Ease of Life Reimbursement: To cover everything from an Uber home in the rain, childcare, or meal delivery
Career Development: Access to mentorship, training, and opportunities to grow your career
Inclusive Environment: A culture dedicated to diversity, equity, inclusion, and belonging

Fulltime

New

Sr. Back-End Engineer

This is a once in a life time opportunity to join what is soon to be a unicorn p...

Location

United States , San Francisco

Salary:

200000.00 - 300000.00 USD / Year

80Twenty

Expiration Date

Until further notice

Requirements

Startup mindset
6+ years of back-end development experience, with deep expertise with Typescript/Python
Experience leading technical initiatives and shipping scalable, high-performance systems to support web and mobile applications
Strong knowledge of modern back-end tooling
Strong knowledge of bash scripting and linux/unix commands
A passion for creating fast, optimized and elegant solutions to difficult problems
Expertise with AI code generation tools

Job Responsibility

Lead the development, optimization and expansion of core backend services
Drive best practices in performance, security, and scalability as our client scales rapidly
Work closely with Product, Design and Front-end teams to deliver seamless, intuitive user experiences
Own key architectural decisions, mentoring engineers, and elevating back-end excellence across the company
Build out data-driven services and systems to improve the customer experience
Mentor an influence engineering culture, fostering innovation and technical ownership within the team

What we offer

equity package

Fulltime

New

Sr. Back-End Engineer

This is a once in a life time opportunity to join what is soon to be a unicorn p...

Location

United States , San Francisco

Salary:

200000.00 - 300000.00 USD / Year

80Twenty

Expiration Date

Until further notice

Requirements

Startup mindset
6+ years of back-end development experience, with deep expertise with Typescript/Python
Experience leading technical initiatives and shipping scalable, high-performance systems to support web and mobile applications
Strong knowledge of modern back-end tooling
Strong knowledge of bash scripting and linux/unix commands
A passion for creating fast, optimized and elegant solutions to difficult problems
Expertise with AI code generation tools

Job Responsibility

Lead the development, optimization and expansion of core backend services
Drive best practices in performance, security, and scalability as our client scales rapidly
Work closely with Product, Design and Front-end teams to deliver seamless, intuitive user experiences
Own key architectural decisions, mentoring engineers, and elevating back-end excellence across the company
Build out data-driven services and systems to improve the customer experience
Mentor an influence engineering culture, fostering innovation and technical ownership within the team

What we offer

equity

Fulltime

New

Sr. Back-End Engineer

This is a once in a life time opportunity to join what is soon to be a unicorn p...

Location

United States , San Francisco

Salary:

200000.00 - 300000.00 USD / Year

80Twenty

Expiration Date

Until further notice

Requirements

Startup mindset
6+ years of back-end development experience, with deep expertise with Typescript/Python
Experience leading technical initiatives and shipping scalable, high-performance systems to support web and mobile applications
Strong knowledge of modern back-end tooling
Strong knowledge of bash scripting and linux/unix commands
A passion for creating fast, optimized and elegant solutions to difficult problems
Expertise with AI code generation tools

Job Responsibility

Lead the development, optimization and expansion of core backend services
Drive best practices in performance, security, and scalability as our client scales rapidly
Work closely with Product, Design and Front-end teams to deliver seamless, intuitive user experiences
Own key architectural decisions, mentoring engineers, and elevating back-end excellence across the company
Build out data-driven services and systems to improve the customer experience
Mentor an influence engineering culture, fostering innovation and technical ownership within the team

What we offer

equity package

Fulltime

New

Sr. Back-End Engineer

This is a once in a life time opportunity to join what is soon to be a unicorn p...

Location

United States , San Francisco

Salary:

200000.00 - 300000.00 USD / Year

80Twenty

Expiration Date

Until further notice

Requirements

Startup mindset
6+ years of back-end development experience, with deep expertise with Typescript/Python
Experience leading technical initiatives and shipping scalable, high-performance systems to support web and mobile applications
Strong knowledge of modern back-end tooling
Strong knowledge of bash scripting and linux/unix commands
A passion for creating fast, optimized and elegant solutions to difficult problems
Expertise with AI code generation tools

Job Responsibility

Lead the development, optimization and expansion of core backend services
Drive best practices in performance, security, and scalability as our client scales rapidly
Work closely with Product, Design and Front-end teams to deliver seamless, intuitive user experiences
Own key architectural decisions, mentoring engineers, and elevating back-end excellence across the company
Build out data-driven services and systems to improve the customer experience
Mentor an influence engineering culture, fostering innovation and technical ownership within the team

What we offer

equity package

Fulltime

New

Sr. Back-End Engineer

This is a once in a life time opportunity to join what is soon to be a unicorn p...

Location

United States , San Francisco

Salary:

200000.00 - 300000.00 USD / Year

80Twenty

Expiration Date

Until further notice

Requirements

Startup mindset
6+ years of back-end development experience, with deep expertise with Typescript/Python
Experience leading technical initiatives and shipping scalable, high-performance systems to support web and mobile applications
Strong knowledge of modern back-end tooling
Strong knowledge of bash scripting and linux/unix commands
A passion for creating fast, optimized and elegant solutions to difficult problems
Expertise with AI code generation tools

Job Responsibility

Lead the development, optimization and expansion of core backend services
Drive best practices in performance, security, and scalability as our client scales rapidly
Work closely with Product, Design and Front-end teams to deliver seamless, intuitive user experiences
Own key architectural decisions, mentoring engineers, and elevating back-end excellence across the company
Build out data-driven services and systems to improve the customer experience
Mentor an influence engineering culture, fostering innovation and technical ownership within the team

What we offer

top of the market salary range
very strong equity package

Fulltime

Sr Back End Engineer for Streaming Data Platform

Do you want to build a high-quality data platform that will innovate financial m...

Location

Salary:

Not provided

KOR Financial

Expiration Date

Until further notice

Requirements

A minimum of 8+ years of experience as a Back End Engineer
Experience with Java and Spring Boot
Experience with building and running applications on public cloud vendors like AWS
Working experience with one or more of the following technologies: Kafka, Kafka Streams processor API (not high-level DSL), Flink, DataBricks, EMR, DeltaFlow
Experience profiling, debugging, and performance tuning complex distributed systems
Willingness to closely collaborate by pairing
A firm reliance on unit testing and mocking frameworks with a TDD (Test Driven Development) mindset
Knowledge of OOP principles and modern development practices

Job Responsibility

Designing and implementing the streaming data platform engine and SDK
Implementing new features for our range of web and streaming applications and data reporting capabilities
Be an active voice in the platform's build-out in regards to the technical choices and implementations
Working closely with the broader team to embrace new challenges and adapt requirements as we continue to grow and adjust priorities
Paired programming with a growing team of Back-end, Data, and Front-end Engineers

What we offer

Culture of trust, empowerment, and constructive feedback
Competitive salary, great IT equipment, and expense allowance
Flexible working times
A span of control that matches your ambitions and skills
Commitment to a genuine, balanced relationship
We will listen to you, take your needs and wishes seriously, and work to help you grow professionally

Sr. Back-End Engineer

80Twenty

Location:
United States , San Francisco

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Additional Information:

Job Posted:
December 23, 2025

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