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

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

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

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

Sr. Product Engineer (back-end)

Our organizers use WeTravel to win travelers by creating beautiful proposals and...

Location

Netherlands , Amsterdam

Salary:

Not provided

WeTravel

Expiration Date

Until further notice

Requirements

7+ years of software engineering experience (ideally full-stack) with strong product ownership mindset
Proficiency with Ruby on Rails, or in at least two other languages Python/Go/Java/Kotlin/Node.js or .NET with desire to learn Ruby
Have experience and the desire to build user experiences (e.g. web front-ends)
Have experience building and working with distributed systems, microservices and event-driven architecture and demonstrate strong systems thinking and can design for scalability serving thousands of customers a day
Have experience with operating production systems, monitoring, and on-call responsibilities
Have excellent communication skills and experience working in multicultural, distributed teams
Experience using AI assistants like Cursor, Claude Code or GitHub Copilot for code generation and testing
Have experience leading projects and mentoring other engineers

Job Responsibility

Lead and build features end-to-end: from reviewing user interviews and product design, through architection and building systems to deployment and monitoring in production
Partner closely with our product team to discover user problems and shape their solutions - creating a world class experience for our organizers and travelers
Write high-quality, maintainable back-end code in Ruby on Rails and occasionally front-end code in React/React Native
Design reliably, scalable services and systems that anticipate the needs of our customers and future scale of our business
Ensure our services are always on by building resilient applications, ensuring they are well monitored and mitigating incidents as an on-call/incident responder
Mentor teammates and contribute to WeTravel’s engineering practices and excellence

What we offer

Generous "Time to Recharge" policy - enjoy unlimited paid time off to rest, recharge, and show up as your best self
Work remotely for a maximum of 4 weeks per calendar year
2-week cross-functional onboarding program
Cycle-to-work scheme (Swapfiets subscription) or commuting reimbursement
Tuesday team lunches and after-work social events
Beautiful office in central Amsterdam - rooftop garden and right by Rokin metro
Extensive paid family leave
Three paid volunteer days per year - take time to give back to causes you care about, on us
Cutting-edge equipment and tools to set you up for success
Join an international, travel-loving team with a passion for adventure and innovation

Fulltime

Sr Back End Engineer for Streaming Data Platform

We are a VC-backed fintech with a live product in the regulatory trade reporting...

Location

Romania

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), 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
Using Claude Code and other AI tools responsibly to boost productivity
Paired programming with a growing team of Back-end, Data, and Front-end Engineers

What we offer

Working directly with seasoned international engineers with experience at companies like Pivotal (including ex-Spring team members), VMware, Confluent (including Kafka committers), and Apple
Culture of trust, kindness, empowerment, and constructive feedback
Competitive salary, great IT equipment, and expense allowance
Flexible working times
Fully remote, with fun social activities and gatherings
A span of control that matches your ambitions and skills

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

Portugal

Salary:

Not provided

KOR Financial

Expiration Date

Until further notice

Requirements

A minimum of 8.5+ 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)
DataBricks
EMR
DeltaFlow
Experience profiling, debugging, and performance tuning complex distributed systems
Willingness to closely collaborate by pairing

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
Being 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
Using Claude Code and other AI tools responsibly to boost productivity
Paired programming with a growing team of Back-end, Data, and Front-end Engineers

What we offer

Working directly with seasoned international engineers with experience at companies like Pivotal (including ex-Spring team members), VMware, Confluent (including Kafka committers), and Apple
Culture of trust, kindness, empowerment, and constructive feedback
Competitive salary, great IT equipment, and expense allowance
Flexible working times
Fully remote, with fun social activities and gatherings
A span of control that matches your ambitions and skills

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

Poland

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), 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
Being 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
Using Claude Code and other AI tools responsibly to boost productivity
Paired programming with a growing team of Back-end, Data, and Front-end Engineers

What we offer

Working directly with seasoned international engineers with experience at companies like Pivotal (including ex-Spring team members), VMware, Confluent (including Kafka committers), and Apple
Culture of trust, kindness, empowerment, and constructive feedback
Competitive salary, great IT equipment, and expense allowance
Flexible working times
Fully remote, with fun social activities and gatherings
A span of control that matches your ambitions and skills

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

Poland

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)
DataBricks
EMR
DeltaFlow
Experience profiling, debugging, and performance tuning complex distributed systems
Willingness to closely collaborate by pairing

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
Using Claude Code and other AI tools responsibly to boost productivity
Paired programming with a growing team of Back-end, Data, and Front-end Engineers

What we offer

Working directly with seasoned international engineers with experience at companies like Pivotal (including ex-Spring team members), VMware, Confluent (including Kafka committers), and Apple
Culture of trust, kindness, empowerment, and constructive feedback
Competitive salary, great IT equipment, and expense allowance
Flexible working times
Fully remote, with fun social activities and gatherings
A span of control that matches your ambitions and skills

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Sr. Back-End Engineer

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