Junior Back-end Engineer Job at Precise (Lisboa)

Back-End Developer

Start.io is a mobile marketing and audience platform. Start. io empowers the mob...

Location

Salary:

Not provided

Start.io

Expiration Date

Until further notice

Requirements

Bachelor’s degree in Computer Science or equivalent practical experience
2-3 years of professional Java development experience - Must
Proven track record in designing and delivering complex distributed systems and microservices (Docker, Kubernetes)
Strong understanding of scalability, concurrency, and performance optimization challenges
Hands-on experience with CI/CD tools and automated build/deployment pipelines
Proficiency in Spring & Spring Boot frameworks
Excellent communication skills and the ability to influence technical direction across teams
Experience running applications on Kubernetes, with a focus on designing services that scale efficiently and consume resources effectively (rather than cluster administration)
Ability to measure and improve application performance using profiling, benchmarking, and APM tools (e.g., JFR, JMeter, Micrometer, New Relic, Datadog)

Job Responsibility

Design and develop highly scalable, modular backend applications and APIs using Java and Spring Boot
Own the full development lifecycle — from requirements analysis, design, coding, and testing to deployment and monitoring in production
Lead initiatives to improve system scalability, performance, and security
Collaborate closely with Product, Algo, DevOps, BI, and Marketing to deliver integrated, business-driven solutions
Ensure observability through robust logging, metrics, and alerting with tools like Prometheus, Grafana, Kibana
Drive adoption of engineering best practices, code quality standards, and technical documentation
Mentor and guide junior developers, fostering knowledge sharing and continuous improvement

Java/Spring Boot Junior Software Engineer

Embark on an exciting journey into the realm of software development with 3Pilla...

Location

United Kingdom

Salary:

Not provided

3Pillar Global

Expiration Date

Until further notice

Requirements

3+ years of software development experience in an industry setting in one or more languages at least one of which is Java — with focus on data-structures and algorithms
involved in all aspects from design, implementation, automated testing and maintenance
2+ years experience using Spring Boot
2+ years of experience working on large-scale back-end distributed systems deployed to AWS (back-end focused)
A Bachelor's degree in Computer Science or related field with 3+ years of industry experience in software design and development, or a Master's/PhD with 2+ years of practical experience

Job Responsibility

Craft client code that is not just efficient, but also performant, testable, scalable, secure, and of the highest quality
Provide accurate status tracking, reporting, and estimation using project methods and tools
Gather requirements, validate their understanding amongst the team, create and maintain relevant documentation
Execute activities within current methodology and upholding the highest quality standards
Foster collaboration with fellow engineers, designers, and managers to comprehend user pain points and iterate on solutions that drive client success
Take ownership of projects, from technical design to a successful launch

What we offer

flexible work environment
remote-first approach
part of a global team
wellbeing focus
fitness offerings
mental health plans
generous time off
accelerate career growth and development opportunities
equal opportunity employer

Fulltime

Junior Software Engineer

As part of our team, you will work in the technology department as a Software En...

Location

Netherlands , Amsterdam

Salary:

Not provided

Hiber

Expiration Date

Until further notice

Requirements

Bachelor’s or Master’s degree in Computer Science or equivalent skillset
At least 1-2 years of experience as a Software Engineer
Based in the Netherlands
Experience in working with JVM languages (Kotlin preferred or Scala/Java, our codebase is in Kotlin)
Good understanding of SQL and RESTful APIs, with previous exposure to cloud and containerization (Docker)
Familiarity with version control(Git) and CI/CD workflows

Job Responsibility

Develop and maintain our codebase, bugfixing, improving performance and refactoring to maintain quality. Security, scalability and reliability of our system start in code
Share responsibility with the team in maintaining platform operations health and ensure system reliability during office hours
Use DevOps practices to test, automate and deploy within our CI/CD
Work closely with the other back-end developers, front-end developers and product owner to help build end-to-end functionality
Stay up-to-date with the latest technologies and share knowledge with the rest of the team

What we offer

Be part of an innovative IoT company with state-of-the-art technology
Collaborate with an international team of experienced professionals across multiple disciplines
Enjoy an open, learning-rich culture with opportunities for significant ownership
Work in a small team where your contributions are highly valued
Benefit from flexible hours and work-from-home options, with 4-5 days a week in our vibrant Amsterdam office
Enjoy office perks such as a delicious lunch and Thursday drinks
A competitive salary with 27 vacation days per year based on a 40-hour working week

Fulltime

Junior Partner Integration Engineer

As a Junior Partner Integration Engineer at Cozycozy, you will be a vital member...

Location

Hungary , Budapest

Salary:

Not provided

cozycozy

Expiration Date

Until further notice

Requirements

1-2 years of professional experience in software engineering, preferably in a back-end focused role, or equivalent project experience
Core stack knowledge and experience in Node.js, JavaScript & TypeScript
Familiarity with either NoSQL (MongoDB) or relational (PostgreSQL) databases
A basic understanding of web concepts is a plus (cookies, sessions handling etc)
High curiosity and a strong desire to learn complex system architecture, data integration techniques, and reactive programming principles (RxJS)
A meticulous approach to writing code and debugging data synchronization issues
Good written and verbal communication skills in English, suitable for a collaborative international environment
An ability to take ownership of assigned tasks and seek help proactively when blocked
Genuine enthusiasm for technology, travel, and joining a high-growth company

Job Responsibility

New Integrations: Assist Senior Engineers in developing, testing, and deploying integrations with new accommodation partners using Node.js/TypeScript
Data Collection: Write and maintain reliable code to fetch both static partner information and real-time price & availability data, utilizing partner APIs or web scraping tools
Troubleshooting: Actively participate in debugging and resolving issues related to existing integrations to ensure data accuracy and reliability
Data Processing: Contribute to the maintenance and enhancement of back-end services responsible for data ingestion and processing, learning about performance optimization and scalability
Database Operations: Perform basic operations and assist in optimizing queries across our MongoDB and PostgreSQL databases, under senior guidance
Asynchronous Logic: Learn and apply concepts of RxJS and reactive programming within the Node.js environment to manage data streams efficiently
Code Quality: Participate in regular code reviews, offering constructive feedback and learning best practices for writing clean, well-tested, and maintainable code
Documentation: Create and update technical documentation for new and existing partner integrations
Teamwork: Collaborate effectively with the engineering team, product managers, and business stakeholders to understand integration requirements

What we offer

Opportunity to learn from and be mentored by Senior engineers, accelerating your professional and technical growth
A stimulating and supportive work environment with an international team (12 nationalities represented) that is passionate about travel and innovation
Strong entrepreneurial and open-minded culture with numerous projects to imagine and lead
Enjoy our office in the center of Budapest with unlimited coffee, tea, drinks, and snacks

Junior QA Engineer

EveryMatrix is a leading B2B SaaS provider delivering iGaming software, content ...

Location

Croatia , Zagreb

Salary:

1700.00 EUR / Month

EveryMatrix

Expiration Date

Until further notice

Requirements

Experience with issue trackers (e.g., JIRA) and test management tools (e.g., TestRail)
Basic understanding of programming logic and testing methodologies
Knowledge of SDLC and STLC processes
Experience testing on various platforms (Mobile, Desktop)
Strong bug identification, documentation, and communication skills
Advanced English skills in speaking and writing
Ability to identify gaps in testing and propose solutions
Autonomous and resourceful

Job Responsibility

Define and implement QA best practices (test plans, test cases)
Identify and report high-quality bugs, perform regression testing
Conduct various testing types (End-to-End, Black Box, Grey Box, Exploratory, Smoke, Regression)
Test both Front-End and Back-End
collaborate with the team for quality assurance
Participate in team meetings and actively contribute
Support developers in bug reproduction and resolution
Log tasks in JIRA and track time spent on tasks
Use Playwright with JavaScript for automation testing
Perform API testing to ensure functionality and reliability

What we offer

Work from the office with occasional possibility of remote work
Sliding work schedule (start anytime between 8:00 to 10:00 am)
Start with 23 days of annual leave, with 2 additional days added each year, up to 33 days by your fifth year with us
Benefit from two Free Fridays each year, limited to one per quarter
Support for New Parents: 21 weeks of paid maternity leave, with the flexibility to work from home full-time until your child turns 1 year old
4 weeks of paternity leave, plus the flexibility to work from home full-time until your child is 13 weeks old
Our office perks include parking, on-site massages, and frequent team-building activities in various locations
Monthly meal allowance
Paid Personal Days for specific life events, including but not limited to childbirth, wedding, relocation, blood donation, and volunteering
Private health insurance and an extended health plan – Wiener

Fulltime

Senior Partner Integration Engineer

Cozycozy is the only platform that gives you real-time access to all available h...

Location

France , Paris

Salary:

Not provided

cozycozy

Expiration Date

Until further notice

Requirements

5+ years of experience in back-end engineering, with a strong focus on high-throughput data integration systems
Deep professional experience with Node.js and TypeScript in a production environment
A good working knowledge of both NoSQL (MongoDB) and relational (PostgreSQL) databases, including schema design and performance tuning
A solid understanding and practical application of RxJS or similar libraries for managing asynchronous data flow
A proven track record of developing robust integrations using various techniques: REST/SOAP APIs
Web Scraping (e.g., using Puppeteer, Cheerio, or similar tools)
An analytical mindset with a strong ability to debug complex, distributed systems and resolve data synchronization issues
Ability to manage projects end-to-end, prioritize tasks independently, and drive integration projects to completion
Excellent communication skills (English is required) and experience working effectively with cross-functional, international teams
A passion for the travel industry and a desire to contribute to a rapidly growing, international product

Job Responsibility

Design and develop integrations: Lead the full development lifecycle for integrating new accommodation partners using Node.js/TypeScript
Data Collection & Extraction: Develop resilient and scalable code to fetch both static partner information and real-time price & availability data, utilizing partner APIs and advanced web scraping techniques
Quality Assurance: Implement comprehensive testing (unit, integration) and monitoring to ensure the accuracy, reliability, and low latency of all acquired data
Data Processing Pipeline: Own the maintenance and optimization of back-end services responsible for data ingestion, transformation, and processing
Database Management: Work hands-on with our data stores, primarily MongoDB and PostgreSQL, optimizing data models and query performance for integration-related services
Reactive Programming: Leverage RxJS effectively within the Node.js environment to manage asynchronous data streams and ensure efficient, non-blocking data flow
Mentorship: Actively mentoring junior engineers, providing code reviews, technical guidance, and helping them grow their expertise in large-scale integration and back-end development
Process Improvement: Drive initiatives to standardize integration frameworks, improve deployment pipelines, and enhance the overall efficiency of our partner onboarding process
Technical Consultation: Collaborate with Product Managers and Business Development teams to assess the technical feasibility and scope of new partnership opportunities

What we offer

Competitive salary, stock options, Alan health insurance, and Swile card
Opportunity to mentor junior engineers
Stimulating and supportive work environment with an international team
Strong entrepreneurial and open-minded culture with numerous projects to imagine and lead
Office in Paris with unlimited coffee, tea, snacks, and drinks

New

Lead Full-Stack Engineer

CDI is seeking a hands-on Lead Full-Stack Engineer to be our first in-house engi...

Location

United States , New York

Salary:

160000.00 - 180000.00 USD / Year

Constructive Dialogue Institute

Expiration Date

Until further notice

Requirements

8+ years building full-stack web apps with clear ownership of production systems and architecture
2+ years of proven tech-lead experience (running a small squad, owning delivery, mentoring engineers)
Strong front-end and back-end skills (React + TypeScript preferred
Node.js, Python, or Go acceptable)
History with Next.js (App Router), TailwindCSS, and Auth.js / NextAuth or similar
Production cloud experience (AWS/GCP/Azure), CI/CD, infrastructure-as-code (Terraform / Pulumi), automated deployments, and operational runbooks
Practical experience with NoSQL document stores (DynamoDB, MongoDB or similar) and relational DBs (Postgres or similar)
Experience unifying and syncing data across siloed systems (ETL/transform, deduplication, reconciliation), building user-sync pipelines (OAuth, webhooks, idempotent syncs), and working with GraphQL & REST integrations
Strong practices in authentication/authorization and RBAC, encryption, secrets management, and familiarity with privacy/compliance basics
Implemented logs/metrics/tracing, run incident response and postmortems, and reduced operational risk

Job Responsibility

Partner with Product to improve platform reliability and reduce support load by addressing peak-usage bottlenecks and reworking enrollment, authentication, rostering, and licensing infrastructure
Own end-to-end system architecture and technical roadmap for CDI’s product suite: application, data flows, integrations, and infrastructure
Contribute hands-on to front-end and back-end code to unblock delivery, lead critical implementations, and resolve production issues
Drive and operate CI/CD pipelines, automated testing, observability/monitoring, and alerting
Establish and cultivate engineering best practices (code review, branching, documentation, security)—providing technical oversight of our agency partner and mentoring incoming junior engineers as the team scales
Partner closely with Product, Research, and Implementation to translate CDI’s evidence-based curricula into scalable, usable digital experiences
Ensure secure and privacy-conscious handling of user and institutional data
work with Product and Operations to align on compliance and data policies
Communicate technical choices and tradeoffs clearly to non-technical stakeholders

What we offer

A Mission-Driven Culture — we practice what we preach, so our work culture is characterized by intellectual humility, continuous improvement, and open-mindedness
Remote-First — CDI was founded as a remote-first organization, and we work hard to maintain a strong team culture across vast distances
Unlimited PTO — as well as 13 company holidays
Remote Work Support — up to $500 reimbursed for home office equipment (like desks, chairs, or webcams) and up to $50/month reimbursed for home internet or cell phone expenses
Other Benefits — employer-supported health, vision and dental plans, subsidized parental leave, 3% 401k match, short- and long-term disability insurance, life and AD&D insurance, $1,000 annual professional development budget

Fulltime

New

Junior GenAI Engineer

LeverX is looking for a Junior GenAI Engineer. As an Engineer specializing in Ge...

Location

Georgia

Salary:

Not provided

LeverX

Expiration Date

Until further notice

Requirements

At least 1+ years of experience in Back-End roles, including building microservices (FastAPI, Django) and working with REST/gRPC APIs
Hands-on experience working with GenAI tools and frameworks, including LangChain, LlamaIndex, and RAG pipelines
A solid grasp of AI integration patterns — prompt engineering, model fine-tuning, and vector database optimization
Upper-Intermediate English

Job Responsibility

Design and deploy microservices and back-end systems with a focus on generative AI and chatbot applications
Integrate and optimize third-party AI products, including LLMs and related orchestration frameworks
Optimize AI pipelines using vector databases (e.g., Pinecone, Chroma, Vanna) and tools like LangChain and LlamaIndex for efficient retrieval-augmented generation
Collaborate with cross-functional teams to capture, clarify, and translate stakeholder requirements into technical solutions
Stay ahead of AI trends by prototyping emerging tools and standards (OpenAI APIs, AI agents, multimodality) to drive innovation
Ensure adherence to AI protocols, standards, and best practices throughout the software development lifecycle

What we offer

Excellent work environment: the company is big enough to be reliable, yet small enough to be person-oriented
Full-cycle projects and product development
Training & development-focused approach: clear roadmap for training employees to sustain and enhance the productivity of the organization as a whole, internal technical meetups, free English classes
Collaboration with the teams from the European Union and the United States both onsite and remotely

Junior Back-end Engineer

Precise

Location:
Portugal , Lisboa

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Requirements:

Nice to have:

Additional Information:

Job Posted:
March 28, 2025

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