Full Stack Engineer Job at Harrington Starr (London)

Full Stack Software Engineer

At Atlassian, we're motivated by a common goal: to unleash the potential of ever...

Location

United States

Salary:

Not provided

Atlassian

Expiration Date

Until further notice

Requirements

1-3+ years experience building and developing backend applications
Bachelor's or Master's degree with a preference for Computer Science degree
Experience crafting and implementing highly scalable and performant RESTful micro-services
Proficiency in any modern object-oriented programming language (e.g., Java, Kotlin, Go, Scala, Python, etc.)
Fluency in any one database technology (e.g. RDBMS like Oracle or Postgres and/or NoSQL like DynamoDB or Cassandra)
Real passion for collaboration and strong interpersonal and communication skills
Broad knowledge and understanding of SaaS, PaaS, IaaS industry with hands-on experience of public cloud offerings (AWS, GAE, Azure)
Familiarity with cloud architecture patterns and an engineering discipline to produce software with quality

Job Responsibility

Build and ship features and capabilities daily in highly scalable, cross-geo distributed environment
Be part of an amazing open and collaborative work environment with other experienced engineers, architects, product managers, and designers
Review code with best practices of readability, testing patterns, documentation, reliability, security, and performance considerations in mind
Mentor and level up the skills of your teammates by sharing your expertise in formal and informal knowledge sharing sessions
Ensure full visibility, error reporting, and monitoring of high performing backend services
Participate in Agile software development including daily stand-ups, sprint planning, team retrospectives, show and tell demo sessions

What we offer

Health coverage
Paid volunteer days
Wellness resources
Bonuses
Commissions
Equity

Fulltime

Info Security Full Stack Engineer

The Info Security Tech Sr Analyst is an intermediate level position responsible ...

Location

India , Pune; Mumbai

Salary:

Not provided

Citi

Expiration Date

Until further notice

Requirements

Knowledge of 3rd party supplier controls and risk assessment for applications is preferred
At least 3+ years’ demonstrated performance as a technical SME in a highly regulated environment with 8+ years of experience as a developer
Experience with technical documentation, API specifications, architectural diagrams etc.
Experience in the design and implementation of compliance programs and projects
Strong written and oral communication skills, attention to detail and ability to deliver high quality materials, results oriented
Role model for and driver of a culture of ethics, learning and accountability
Positive, can-do attitude, action and results-oriented, decisive, and willing to take control of a situation when required
trusted advisor with sound judgment even when operating under pressure or significant stress
Exceptional candidates who do not meet all criteria may be considered for the role based on skills, ability to learn and positive, do what it takes attitude to drive success
Technical skills: HTML, CSS, JSAngular v13 (preferred),SharePoint development, SharePoint Workflow development

Job Responsibility

Developing and configuring solutions based on business needs and inputs
Develop tools and solutions to integrate risk management applications with other Citi systems
Test planning, coordination, and tracking including unit testing, integration testing, and User Acceptance
Ensuring that appropriate governance and oversight rules are implemented and adhered to
Drive quality in work, documentation and reporting
Provide feedback to improve efficiency, to simplify existing solutions as part of continuous improvement
Be a partner for Internal Teams looking to introduce new capabilities within their business
Assist with regulatory requests
Collaborate with senior Citi management across business and functional lines in case of need as each introduce new capabilities, to keep SaaS activity within our risk tolerance
Drive continuous improvement efforts for quality and efficiency

Fulltime

Sase Cloud Full Stack Engineer

This role focuses on full stack development for Silver Peak Orchestrator web app...

Location

United States , San Jose

Salary:

117500.00 - 270000.00 USD / Year

Hewlett Packard Enterprise

Expiration Date

Until further notice

Requirements

Minimum 5 years of experience in Java-based server-side development
Proven track record of developing database applications using SQL and NoSQL
Experience in HTML, CSS, JavaScript, React, Node.js and REST API
Experience in orchestrating AWS, Azure, GCP, or other cloud services
Experience in developing web applications for cloud deployments
Complete ownership, problem-solving skills and tremendous self-drive
Strong written and verbal communication skills
Bachelor's degree or equivalent in Computer Science or Computer Information Systems/Applications
Cloud Architectures, Cross Domain Knowledge, Design Thinking, Development Fundamentals, DevOps, Distributed Computing, Microservices Fluency, Full Stack Development, Release Management, Security-First Mindset, User Experience (UX)

Job Responsibility

Develop new features for Silver Peak Orchestrator web application
Manage SD-WAN enabled networks
Responsible for backend and frontend software development for web applications
Know white box unit test cases for your implementations
Collaborate with remote teams

What we offer

Comprehensive suite of benefits that supports physical, financial and emotional wellbeing
Specific programs catered to career development
Inclusive work environment
Flexibility to manage work and personal needs

Fulltime

Senior Growth Full-Stack Engineer

Senior Growth Full-Stack Engineer role at Seamless.AI focusing on user activatio...

Location

United States

Salary:

Not provided

Seamless.AI

Expiration Date

Until further notice

Requirements

5+ years of experience as a full-stack engineer (startup or growth-focused environment preferred) with SaaS product
Strong proficiency in modern JavaScript/TypeScript (React.js, Node.js)
Proficiency with modern database technologies (PostgreSQL, Vector DBs, OpenSearch, DynamoDB)
Proficiency with Cloud architecture and scalability best practices, in particular AWS (Lambda, serverless, cloud-native services)
Hands-on experience with A/B testing platforms (GrowthBook, Optimizely, LaunchDarkly, etc.)
Familiarity with feature flag systems and controlled experiment rollout strategies
Experience with product analytics tools (Amplitude, Segment, Tableau)
Ability to translate growth hypotheses into technical experiments quickly and iteratively
Strong data-driven mindset with the ability to evaluate experiment outcomes statistically
Comfortable working in fast-moving, cross-functional growth teams

Job Responsibility

Collaborate with growth, product, and data teams to design and implement A/B tests and growth experiments focused on user activation
Build, deploy, and maintain full-stack features and experiment infrastructure (frontend + backend)
Implement and manage feature flagging systems to enable rapid testing and controlled rollouts
Work with GrowthBook (or similar experimentation platforms) to set up, track, and analyze experiments
Instrument and track user behavior in Amplitude and other analytics platforms to generate insights
Write clean, scalable, and maintainable code across the React frontend and Node.js backend
Monitor and evaluate experiment outcomes, providing actionable insights and recommendations
Balance speed of experimentation with engineering best practices, ensuring quality while moving quickly

Fulltime

Senior Full Stack Data Engineer

Senior Full Stack Data Engineer role in Citi's Chief Technology Office (CTO) Tec...

Location

India , Pune

Salary:

Not provided

Citi

Expiration Date

Until further notice

Requirements

Minimum of 8 years of proven experience in software development
Significant experience as a Data Engineer and Full Stack Developer
Strong proficiency in SQL for data querying, manipulation, and optimization
Experience with NoSQL databases, such as MongoDB
Expertise in designing and developing data pipelines for ingestion, transformation, and processing of large datasets
Deep understanding of multithreading, thread pools, Object-Oriented Programming (OOP) concepts, and design patterns
Demonstrated experience working in an Agile software development environment
Excellent communication, problem-solving, and analytical skills
Proficiency in at least one of the following programming languages: Java or Python
Strong knowledge of DevOps practices, including source control management (e.g., Git), Continuous Integration (CI), Continuous Delivery/Deployment (CD), and automated deployments

Job Responsibility

Design and develop scalable data solutions leveraging platforms such as Iceberg, Snowflake, Trino, or other modern data ecosystems
Design, build, and optimize robust Extract, Load, Transform (ELT) and Extract, Transform, Load (ETL) data pipelines
Collaborate effectively with domain experts, product managers, analysts, and data scientists to understand data requirements and deliver efficient data solutions
Enable advanced analytics and machine learning workflows by ensuring the delivery of high-quality, reliable, and timely data
Implement and manage CI/CD pipelines to automate data engineering workflows across both cloud and on-premises environments
Research, evaluate, and recommend the integration of open-source technologies into our data platform
Clearly communicate complex technical details, project progress, and challenges to both technical and non-technical stakeholders
Design, develop, and implement scalable full-stack applications using technologies such as JavaScript, ReactJS, NodeJS, Python, and SQL/NoSQL databases
Write clean, efficient, well-documented, and maintainable code, adhering to industry best practices

Fulltime

Senior Full Stack Engineer, Control Plane

The Senior Full Stack Engineer, Control Plane will design and build secure, reli...

Location

Salary:

Not provided

ACI Infotech

Expiration Date

Until further notice

Requirements

Bachelor’s degree in Computer Science or equivalent experience
5+ years of full stack development with strong backend plus React and TypeScript
Proven experience with auth, RBAC, and secure APIs
Skilled in Postgres and containerized deployments
Hands-on experience with cloud platforms (AWS/Azure/GCP) and Kubernetes
Strong commitment to code quality and testing discipline
Experience shipping enterprise SaaS control surfaces
Comfort working across API, data, and UI boundaries

Job Responsibility

Design and implement control plane services and secure APIs
Build React and TypeScript UIs for policy, access, quota, and usage management
Instrument services with OpenTelemetry and service-level metrics
Strengthen authentication, RBAC, and input validation across the stack
Develop and maintain tests at unit, integration, and end-to-end levels
Deliver auditable APIs with predictable versioning and SLAs
Enhance operator UX to enable self-service without tickets

Fulltime

Senior Full Stack Engineer

This is a seasoned engineer role in which you lead technical efforts across mult...

Location

United States

Salary:

140400.00 - 175500.00 USD / Year

Bugcrowd

Expiration Date

Until further notice

Requirements

6-8 years of experience
Bachelor’s degree in Computer Science, Software Engineering, or related field
Strong proficiency in modern programming languages (e.g., Python, Java, Go, Node.js)
Experience with API frameworks and tools (Spring Boot, Express.js, FastAPI, etc.)
Proficient in User Interface (UI) development using modern languages / frameworks (Typescript, React)
Proficient in API design standards (REST, GraphQL, gRPC)
Experience with API gateways and management tools (Kong, Apigee, AWS API Gateway, etc.)
Knowledge of message queues and streaming platforms (Kafka, RabbitMQ, AWS SNS/SQS)
Familiarity with OAuth2, JWT, and other authentication/authorization frameworks
Hands-on experience with CI/CD pipelines and cloud services (AWS, Azure, or GCP)

Job Responsibility

Proactively research, prototype, and introduce new technologies or architectural approaches that improve team or org-wide capabilities
Own the reliability, observability, and operational excellence of key systems—ensuring they meet or exceed defined SLAs
Actively mentor and sponsor engineers across levels, fostering career growth and encouraging broader technical participation
Continuously evolve team processes, driving scalable improvements in delivery, quality, and collaboration
Drive impact at the team and cross-team level
Provide strong technical leadership across one or more scrum teams, aligning execution with architectural vision and business goals
Design, develop, and maintain scalable and secure APIs, UIs and integration services
Implement RESTful, GraphQL, and event-driven APIs/UIs for internal and external systems
Collaborate with product, data, and platform teams to ensure seamless system interoperability
Manage API lifecycle including versioning, authentication, monitoring, and performance optimization

What we offer

Discretionary bonus program or commission plan
Reasonable accommodations for people with disabilities

Fulltime

Senior Software Engineer - Java Full Stack - Futures Engineering

As a Developer, you will be enhancing and maintaining an enterprise Cleared Deri...

Location

United States , Chicago

Salary:

185000.00 - 215000.00 USD / Year

Clear Street

Expiration Date

Until further notice

Requirements

5+ years of professional experience in back-end development with Java
3+ years of experience within a financial institution, preferably in FCM (Futures Commission Merchant) or Broker-Dealer environments
Ability to work under pressure and meet deadlines
Experience building microservices
Strong understanding of design patterns, multithreading, and performance optimization
Strong problem-solving skills and ability to debug complex systems
Hands-on experience with Apache Kafka for event streaming and messaging
Proficiency in MongoDB or AWS DocumentDB for NoSQL database design and querying
Familiarity with Apache Solr for search and indexing, Apache ZooKeeper for distributed system coordination, and HashiCorp Vault for secrets management
Experience with Kubernetes for container orchestration and deployment

Job Responsibility

Working in a project team alongside other developers to architect, develop, and optimize server-side applications, RESTful APIs, and microservices using Java
Implement event-driven architectures with Apache Kafka and for real-time data processing
Contribute to front-end development using ReactJS, focusing on integrating UI components with back-end services
Optimize application performance, security, and reliability
Deploy and manage applications in Kubernetes clusters, ensuring high availability and scalability
Provide technical support for application
Collaborate with cross-functional teams across the organization to architect solutions and deliver robust features
Participate in code reviews, unit testing, and CI/CD pipeline maintenance

What we offer

competitive compensation packages
company equity
401k matching
gender neutral parental leave
full medical, dental and vision insurance
lunch stipends
fully stocked kitchens
happy hours

Fulltime

Full Stack Engineer

Harrington Starr

Location:
United Kingdom , London

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Additional Information:

Job Posted:
February 17, 2026

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Full Stack Engineer

Harrington Starr

Location:United Kingdom , London

Category:IT - Software Development

Contract Type:Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Additional Information:

Job Posted:February 17, 2026

Looking for more opportunities? Search for other job offers that match your skills and interests.

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Category:
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Contract Type:
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Job Posted:
February 17, 2026