Mid-level Frontend Engineer Job at AlphaSights (London)

Mid-level Fullstack Engineer

We are looking for highly talented and driven software engineers who take pride ...

Location

United States , New York

Salary:

140000.00 USD / Year

AlphaSights

Expiration Date

Until further notice

Requirements

Degree in a STEM subject (or equivalent experience)
Experience working at a similar level in a mature Engineering team
Technical expertise with at least one popular backend language (ideally Java or Kotlin)
Experience with ElasticSearch
Familiarity with frontend frameworks such as React
Proven track record of demonstrable impact
Highly driven and proactive
Meticulous with high standards and obsessive attention to detail

Job Responsibility

Design solutions and contribute to architectural vision
Ship working code primarily with React, Kotlin microservices, Postgres, and Ruby on Rails
Deploy and iterate using CI/CD tools like CircleCI and Spinnaker
Build competency and use L&D budget for technical development
Maintenance and troubleshooting of services

What we offer

Potential for bonus

Fulltime

Mid-level Backend Engineer

We are looking for highly talented and driven Backend Software Engineers who tak...

Location

Portugal

Salary:

Not provided

AlphaSights

Expiration Date

Until further notice

Requirements

Degree in a STEM subject (or equivalent experience)
3+ years of experience working at a similar level in a mature Engineering team
Technical expertise with at least one programming language (Kotlin, Ruby)
Experience with relational databases
Proven track record of demonstrable impact in previous roles
Highly driven and proactive
Meticulous with high standards and obsessive attention to detail

Job Responsibility

Design solutions to business problems and contribute to architectural vision
Ship working code (React frontend, Kotlin microservices with Postgres backend, some Ruby on Rails)
Deploy and iterate frequently
Build competency and use L&D budget for technical development
Maintenance and troubleshooting of services

Fulltime

Mid-level Backend Engineer

We are looking for highly talented and driven software engineers who take pride ...

Location

United Kingdom , London

Salary:

Not provided

AlphaSights

Expiration Date

Until further notice

Requirements

Degree in a STEM subject (or alternative route)
3+ years of experience working at a similar level in a mature Engineering team
Technical expertise with Java or Kotlin
Experience with relational databases
Proven track record of demonstrable impact in previous roles
Highly driven and proactive
Meticulous with high standards and obsessive attention to detail

Job Responsibility

Design solutions and contribute to architectural vision
Ship working code primarily with React on frontend and Kotlin microservices with Postgres on backend
Deploy and iterate using CircleCI and Spinnaker for CI/CD
Build competency and learn quickly
Maintenance and troubleshooting of services

What we offer

L&D budget to fast-track development of specific technical competencies

Fulltime

Senior Frontend Engineer

We’re looking for a Senior Frontend Engineer with expertise in modern, cloud-bas...

Location

Indonesia

Salary:

Not provided

FrankieOne

Expiration Date

Until further notice

Requirements

5+ years’ experience in software engineering teams within an Agile environment
3+ years working with React (React Native for Web a plus)
3+ years working with TypeScript and Node.js
Strong understanding of HTML5, ES6, CSS3/Sass, and front-end fundamentals
Experience designing and consuming RESTful APIs
Solid experience with testing frameworks such as Playwright
Hands-on experience with Docker, CI/CD pipelines (GitHub Actions, Terraform, AWS)
Excellent collaboration and communication skills — you thrive in a global, remote team environment

Job Responsibility

Internal drive to own web application features E2E (end to end) including design collaborations, development, testing with observability, monitoring to deliver high-quality web applications that meet business and user needs
Collaborate with a global, cross-functional team of engineers, product managers, and designers
Contribute to architectural discussions and participate in technical design and implementation decisions
Write clean, maintainable, and secure code following best practices
Drive software quality through automated testing, integration testing, observability, monitoring and continuous improvement
Mentor and guide peers, helping junior and mid-level engineers grow through knowledge sharing and code reviews
Stay ahead of emerging technologies and introduce innovative ideas to improve our products and engineering practices

Fulltime

Senior Full-stack Engineer

Join one of our platform teams and help us build the foundations that power Prod...

Location

Czechia , Prague

Salary:

Not provided

ProductBoard

Expiration Date

Until further notice

Requirements

4+ years of professional experience building and maintaining production systems at scale
Strong backend development skills in Kotlin or Java, with experience in designing and evolving service-level logic and infrastructure
Working proficiency in React and TypeScript, with the ability to contribute meaningfully to frontend implementation and UX polish
Proven ability to own features end-to-end across backend and frontend systems
Experience delivering projects iteratively in cross-functional teams
Familiarity with tools like PostgreSQL, Kafka, GraphQL, and AWS
Experience mentoring other engineers and helping uplift team-wide engineering quality
Clear communication skills - especially when explaining technical trade-offs and collaborating across functions
A pragmatic, product-focused mindset - you care about delivering impact, not just elegant code

Job Responsibility

Take full ownership of features and platform capabilities, working across backend (Kotlin) and frontend (React/TypeScript) layers to deliver end-to-end solutions
Lead the delivery of complex or ambiguous fullstack projects, breaking down problems, scoping technical work, and shipping iteratively
Work primarily in Kotlin-based services to build reliable, scalable, and maintainable internal systems
Contribute to platform-wide efforts like authentication, permissions, notifications, and shared UI patterns
Collaborate with product managers and designers to define technical solutions that balance speed, scope, and user experience
Write high-quality, well-tested code across both frontend and backend codebases
Mentor junior and mid-level engineers through pairing, design reviews, and technical feedback

Lead Backend Engineer

At cozycozy, we’re building the world’s best accommodation metasearch platform, ...

Location

France , Paris

Salary:

Not provided

cozycozy

Expiration Date

Until further notice

Requirements

Strong experience with Node.js + TypeScript (Fastify, Express, Yarn, Zod, OpenAPI, Jest ) monorepo tooling is a plus
Solid experience with Go (Gin, Zap, code generators) or willingness to deepen your Go skills
Deep understanding of databases: MongoDB, PostgreSQL, Redis/Dragonfly and know Functional Programming Principles
Strong experience with Docker, Kubernetes, and cloud/bare-metal deployments (Linux, K3s)
Experience with queues & event-driven systems (RabbitMQ, Google Pub/Sub, Kafka)
Experience building and maintaining REST (OpenAPI, Swagger), gRPC APIs
Confidence working on big data pipelines, collaborating with data engineers, and creating scheduled jobs with Airflow or k8s Cronjobs
Observability-driven engineer with hands-on experience in Grafana, Prometheus, Loki, and Promtail, and a mindset focused on continuously improving monitoring and insights

Job Responsibility

Act as the reference engineer for backend topics, supporting the Head of Engineering in driving technical direction
Mentor senior and mid-level engineers, helping them grow through guidance on architecture, best practices, and code quality
Lead technical discussions, design reviews, and RFC processes
Own core backend systems powering millions of real-time accommodation results
Design and maintain scalable, low-latency services ingesting large volumes of data from dozens of partners
Contribute to key architecture decisions and ensure alignment with long-term platform goals
Ensure reliability, performance, and observability across backend components
Write high-quality TypeScript/Node.js and Go code while supporting continuous delivery of new features
Evolve our APIs (REST, gRPC, OpenAPI) to improve speed and performance
Work closely with product, data, and frontend to deliver user-impacting improvements

What we offer

Competitive salary
stock options
Alan health insurance
Swile card

Lead Backend Engineer

At cozycozy, we’re building the world’s best accommodation metasearch platform, ...

Location

France , Paris

Salary:

Not provided

cozycozy

Expiration Date

Until further notice

Requirements

Strong experience with Node.js + TypeScript (Fastify, Express, Yarn, Zod, OpenAPI, Jest ) monorepo tooling is a plus
Solid experience with Go (Gin, Zap, code generators) or willingness to deepen your Go skills
Deep understanding of databases: MongoDB, PostgreSQL, Redis/Dragonfly and know Functional Programming Principles
Strong experience with Docker, Kubernetes, and cloud/bare-metal deployments (Linux, K3s)
Experience with queues & event-driven systems (RabbitMQ, Google Pub/Sub, Kafka)
Experience building and maintaining REST (OpenAPI, Swagger), gRPC APIs
Confidence working on big data pipelines, collaborating with data engineers, and creating scheduled jobs with Airflow or k8s Cronjobs
Observability-driven engineer with hands-on experience in Grafana, Prometheus, Loki, and Promtail, and a mindset focused on continuously improving monitoring and insights

Job Responsibility

Act as the reference engineer for backend topics, supporting the Head of Engineering in driving technical direction
Mentor senior and mid-level engineers, helping them grow through guidance on architecture, best practices, and code quality
Lead technical discussions, design reviews, and RFC processes
Own core backend systems powering millions of real-time accommodation results
Design and maintain scalable, low-latency services ingesting large volumes of data from dozens of partners
Contribute to key architecture decisions and ensure alignment with long-term platform goals
Ensure reliability, performance, and observability across backend components
Write high-quality TypeScript/Node.js and Go code while supporting continuous delivery of new features
Evolve our APIs (REST, gRPC, OpenAPI) to improve speed and performance
Work closely with product, data, and frontend to deliver user-impacting improvements

What we offer

Competitive salary
stock options
Alan health insurance
Swile card

New

Mid-Level Quality Assurance Engineer

AlphaSights is looking for a self-driven QA Automation Engineer to join the Soft...

Location

United Kingdom , London

Salary:

Not provided

AlphaSights

Expiration Date

Until further notice

Requirements

Degree in a STEM subject (or equivalent experience)
Experience working at a similar level in a mature Engineering team
Technical expertise building and maintaining automated test frameworks using modern tools (ideally Cypress or Playwright)
Proficiency in at least one programming language such as TypeScript, JavaScript, Python, or Java
Strong understanding of backend APIs, data validation (SQL/NoSQL), and CI/CD pipelines
Familiarity with frontend testing (ideally React-based applications) and API or integration testing in distributed systems
Proven track record of demonstrable impact in previous roles
Highly driven and proactive
Meticulous with high standards and obsessive attention to detail

Job Responsibility

Design and develop automated test plans and suites across multiple projects to validate software functionality and ensure regression coverage
Develop and maintain test automation frameworks and infrastructure and provide tools for developers to test their own code
Lead test automation efforts while performing targeted manual testing when needed
Create, manage, and maintain test data to support automated testing across environments
Support robust testing through API test automation, test data management, and cross-platform validation across browsers and devices
Collaborate with Engineering and Product teams to define test strategies and acceptance criteria
Integrate automated tests into CI/CD pipelines for fast and continuous feedback
Monitor, triage, and investigate test failures, raising clear and actionable bugs
Provide feedback for UI/UX improvements/enhancements
Continuously contribute to the overall improvement of testing tools, processes, and team best practices

Fulltime

Mid-level Frontend Engineer

AlphaSights

Location:
United Kingdom , London

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Additional Information:

Job Posted:
January 16, 2026

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