Senior Software Developer (m/w/d)

Working at Infobip means being part of something truly global. With 75+ offices across six continents, we’re not just building technology — we’re shaping how more than 80% of the world connects and communicates.

As employees, we take pride in contributing to the world’s largest and only full-stack cloud communication platform. But it’s not just what we do, it’s how we do it: with curiosity, passion, and a whole lot of collaboration.

We operate with an AI-first mindset, embedding intelligent tools into our daily workflows to work smarter and more efficiently. Every role here benefits from and contributes to this approach.

If you're looking for meaningful work and challenges that grow you in a culture where people show up with purpose, this is your opportunity.

Let’s build what’s next, together.

What is this role all about?
As a Mid or Senior Software Engineer at Infobip, you will be part of our Engineering Powerhouse, working on an in-house developed product that operates at a global scale. You will contribute to a large, scalable microservices architecture that delivers over 500 million messages daily and supports our clients’ business growth.

This role is focused on our RCS (Rich Communication Services) platform, which powers rich, interactive business messaging that goes far beyond traditional channels. You will help deliver branded, app-like customer experiences routed through carriers worldwide. We’re talking about systems with high uptime, high throughput, and low latency.

When you join us, you will work with Java, Kotlin, and React. If you have a strong foundation in object-oriented programming, we still encourage you to apply, even if you have not worked with this exact tech stack before.
What You’ll Do

• Develop, maintain, monitor, and troubleshoot team-owned services on Infobip’s platform
• Take full ownership of the code you produce, from development to production
• Write well-designed, testable, and scalable code following clean code principles
• Work primarily on backend development while growing toward full-stack development
• Collaborate closely with Product Management on feature development and delivery
• Apply an AI-first mindset, including exploring and integrating AI or LLM-based capabilities into product features where relevant.

What Makes You a Strong Fit

• Strong knowledge and understanding of object-oriented programming principles
• Solid understanding of data structures and algorithms
• Experience working with concurrent and multi-tier applications
• Appreciation for code reviews and experience with code testing practices
• Good understanding of RESTful services
• You are comfortable using modern development approaches, including AI-assisted coding tools and agents.

Nice-to-have Qualifications

• Experience with Java, Spring, and Spring Boot development
• Familiarity with CI/CD tools such as Jenkins, Git, Maven, Canary, or similar
• Understanding of databases and data management tools such as MSSQL, PostgreSQL, Redis, RabbitMQ, Kafka, or similar
• Experience with technologies such as Kotlin, Python, Docker, Kubernetes, or others

Why you'll love it here

• Financial rewards & recognition - A fair compensation aligned with your experience, industry, and market standards, performance-driven bonuses, regular reviews to support your growth and recognize your contributions, and a culture that values your impact.
• ESOP (Employee Stock Ownership Plan) - As an Infobip employee, you’ll have the opportunity to share in our company’s success through stock options.
• Lunch covered by the company
• Attractive credit terms: Available at predefined financial institutions.
• Flexible work arrangements - combine in-person collaboration with remote work and flexible working hours - start between 7 AM and 10 AM
• Work-life balance and Well-being  - We offer time off when you need it, special leave days for life’s big moments, and a flexible hybrid work model tailored to local regulations.
• Career mobility - Your career is a journey. With internal mobility, upskilling, and mentorship, we help you shape your path.
• Professional development - Learning never stops. Onboarding, mentorship, and training programs help you grow - no matter where you start.
• International mobility - Ready to take your career global? Explore short and long-term opportunities in our Hubs worldwide.
• Partially covered Multisport Card or PassSport Card.
• Holiday benefits: Christmas bonus with an extra gift for each child.

While some benefits may vary by location, our goal remains the same: to support your growth, well-being, and success - wherever you are.

For any additional questions, feel free to contact recruiter Zrinka on LinkedIn.

Diversity drives connection
Infobip is built on diverse backgrounds, perspectives, and talents.
We’re proud to be an equal-opportunity employer and are committed to fostering an inclusive workplace.

No matter your race, gender, age, background, or identity — if you have the passion and skills to thrive, there’s a place for you here.

All qualified applicants will receive consideration for employment without regard to race, color, ancestry, religion, age, sex, sexual orientation, gender, gender identity, national origin, citizenship, disability, veteran status or any other part of one's identity.
Read more about our hiring process.

Please be aware that Infobip processes job applications only through our official platform Workday. Applications submitted via other third-party platforms are not reviewed or processed by Infobip.

Ciklum
is looking for a
Senior Back End Engineer
to join our team full-time in Slovakia.

We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About The Role:

As a Senior Back End Engineer, become a part of a cross-functional development team engineering experiences of tomorrow. You will drive the development of our core APIs and cloud infrastructure on AWS, with a relentless focus on security, performance, and scalability. Your role will be pivotal in making key architectural decisions, mentoring team members, and establishing best practices to ensure our services are robust, resilient, and capable of handling significant user traffic and data processing.

Responsibilities:

• Take ownership of the technical design for secure, scalable, and high-performance APIs and services on AWS, within a TypeScript-first ecosystem
• Implement robust security measures across the platform, including authentication, authorization (OAuth 2.0, JWT), data encryption, and vulnerability management
• Drive technical decisions and promote best practices in API design, microservices, testing, and deployment
• Develop scalable backend services and clean, reusable frontend components
• Optimize services for maximum speed and low latency, and proactively identify and resolve performance bottlenecks
• Mentor and guide team members, fostering a culture of technical excellence, security consciousness, and continuous improvement
• Own and enhance our CI/CD pipelines to ensure efficient, automated, and reliable software delivery
• Collaborate closely with Product and Design to translate business requirements into robust and secure technical solutions

Requirements:

Essential Qualifications

• 5+ years of professional experience in backend development
• Proven experience in designing, building, and maintaining secure, distributed systems on AWS.
• Strong, hands-on expertise with TypeScript and Node.js
• Deep understanding of API security principles and best practices (e.g., OWASP Top 10, rate limiting, input validation)
• Demonstrable experience with AWS services such as API Gateway, Lambda, ECS, SQS, SNS, and DynamoDB
• Proficient with CI/CD practices and tools (e.g., Jenkins, GitLab CI, GitHub Actions)
• Hands-on experience with containerization using Docker and an understanding of orchestration (e.g., ECS, Kubernetes)
• Skilled in working with both NoSQL (e.g., MongoDB, DynamoDB) and relational databases (e.g., PostgreSQL), including performance tuning
• Experience with monitoring, logging, and observability tools (e.g., CloudWatch, Datadog, Grafana)
• Strong problem-solving skills and a passion for code quality and technical excellence
• Upper-intermediate or higher level of spoken and written English

Desirable:

• Hands-on expertise with React and Next.js
• Familiarity with event-driven architectures and microservices
• Familiarity with Infrastructure as Code (e.g., CloudFormation, Terraform)
• Working experience with .Net or Python
• Experience with GCP and services like BigQuery

What’s in it for you?

• Strong community: Work alongside top professionals in a friendly, open-door culture that values initiative and empowers its people to succeed
• Fast-paced & agile environment: Be part of a dynamic, fast-moving organization that champions efficiency and innovation
• Global exposure: Collaborate with international, cross-functional teams and contribute to large-scale initiatives
• Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications
• Flexibility: Balance office and remote work to fit your rhythm
• Care: Take advantage of our extensive benefits offering, aligned with the best market standards

The salary starts at 3500 Eur gross. The final salary depends on the previous experience and professional knowledge of the candidate.

About Us

At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.

Our Slovakia hub brings together passionate professionals working on global initiatives. Be part of a close-knit team that’s driving digital transformation and creating lasting impact.

Explore, empower, engineer with Ciklum!

Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.

Department:
Customer Happiness and Lifecycle

Location:
Remote/Yerevan

Description
Tabby creates financial freedom in the way people shop, earn and save by reshaping their relationship with money. Over 15 million users choose Tabby to stay in control of their spending and make the most out of their money.

The company’s flagship offering allows shoppers to split their payments online and in-store with no interest or fees. Over 40,000 global brands and small businesses, including Amazon, Noon, IKEA, and SHEIN use Tabby to accelerate growth and gain loyal customers by offering easy and flexible payments online and in stores.

Tabby generates over $10 billion in annual transaction volume for its partner brands and is the highest-rated, most-reviewed, largest, and fastest-growing FinTech in the GCC region.

Tabby launched in 2019 and has since raised +$1 billion in equity and debt funding from global and regional investors, and is now valued at $4.5 billion.

We’re looking for a
Senior Backend Engineer
to help us build an internal AI agent platform.

You’ll be joining a very early-stage initiative to build an internal platform for an AI agent ecosystem. This is your chance to be a key player in shaping a transformative project from the ground up — one that will scale into a powerful platform impacting multiple areas of the business. You’ll contribute to the foundation of a game-changing solution that integrates AI technologies to drive automation and innovation across the company. You’ll work with cutting-edge technologies, including LLMs and agent frameworks, designing architectures at the intersection of large-scale services and AI, and helping integrate them deeply into core internal tools.

You’ll work on high-impact projects in a high-growth environment, alongside a world-class remote engineering team spread across 20+ countries.

Key Responsibilities

• 5+ years of backend engineering experience, with at least 2 years working with Golang and 2 years working with Python
• Plus will be an experience with AI agent frameworks: Langchain, Langgraph, ADK
• Plus will be an experience in building or integrating LLM-based features and agent-centric architectures.
• Big plus will be an ML experience: learning and evaluation of models, implementation of them in production
• Experience building scalable, distributed systems and working with high-load architectures
• Solid understanding of backend tools and technologies — we use PostgreSQL, Redis, Kubernetes, Google Cloud Platform, GitLab, and a microservices architecture
• Experience developing internal instruments, automations, CRM and so on
• A passion for writing clean, testable, and maintainable code
• A proactive mindset and the ability to work independently
• Strong communication skills in English (B2 level or higher)

Skills, Knowledge & Expertise

• Development of backend for AI agent platform and microservices around it
• Participate in the architecture setup, in choosing technologies
• Stay up to date with updates and frameworks around AI agent technologies, study and experiment.
• Improve and optimize parts of the platform related to agent creation, quality evaluation, and performance under load.
• Work closely with platform clients, take feedback into account, and help build a user-friendly product.

Job Benefits

• Full-time B2B contract
• Fully remote setup, work from anywhere in Europe
• Up to 20% tax allowance
• 22 paid leave days annually
• Stock options (ESOP) in a fast-scaling, pre-IPO company
• Flexi benefits you can use for wellness, travel, or learning
• Work alongside a high-performing, international engineering team in a global fintech unicorn

About FullStack
FullStack is the most transparent IT talent network, connecting highly skilled individuals with top global companies and Silicon Valley startups for remote, on-demand projects. We focus on building a trusted, high-performance network where talent can thrive in a positive, respectful, and supportive environment. By prioritizing transparency, fair opportunities, and professional growth, we empower our engineers to deliver their best work while collaborating with innovative teams worldwide.

We’re Most Proud Of

• Offering life-changing opportunities for talented software professionals across the Americas.
• Enhancing highly-skilled software development teams of hundreds of the world’s greatest companies.
• Our 4.2-star rating on GlassDoor.
• Our client Net Promoter Score of 68, twice the industry average.

The Opportunity
Join our talent network and connect with U.S. clients for flexible, project-based development work as a Senior Backend Engineer Tech Lead (3-4 month long).

• You will integrate directly into our client's team and work alongside their existing designers and engineers on a daily basis.

What We're Looking For

• 6+ years of professional software engineering experience.
• 2+ years of experience in technical leadership influencing architecture and engineering direction.
• Advanced English is required.
• Successful completion of a four-year college degree is required.
• Expertise in Node.js and TypeScript.
• Track record of architecting Backend-for-Frontend (BFF) systems and robust API middleware specialized for mobile platforms.
• Demonstrated experience working with AWS cloud services (specifically EC2, ECS, Lambda, ElastiCache, S3, and CloudFront).
• Solid background in MongoDB and optimizing backend deployment pipelines.
• Experienced with Salesforce OCAPI/API, CMS-driven content management, and mobile-specific third-party integrations.
• Strong history of designing and securing scalable microservices and event-driven architectures for high-scale e-commerce systems.
• Comfortable working with AI development tools, including LLM integration (LangChain or LlamaIndex) and agentic workflows.
• Skilled at representing engineering teams in client-facing interactions and collaborating with external vendors.
• Ability to work through new and difficult issues and contribute to libraries as needed.
• Ability to create and maintain continuous integration and delivery of applications.
• Forensic attention to detail.
• A positive mindset and a can-do attitude.
• Experience working on Agile/Scrum teams.
• Meaningful experience working on large, complex systems.
• Ability to take extreme ownership over your work. Every day is a challenge to ensure you are performing to the expectations you and your team have agreed upon.
• Ability to identify with the goals of FullStack's clients and dedicate yourself to delivering on the commitments you and your team make to them.

Nice To Have
We’re Seeking Engineers Who Are AI-enthusiastic In Their Workflow. Professional Experience Or Personal Project Work With The Following Is a Significant Plus

• Cursor, Windsurf, or Google Antigravity.
• Claude Code, Gemini CLI, Codex, or Copilot CLI.

Work Authorization Requirements

• Applicants must be currently authorized to work in the country of this job posting on a full-time basis.
• FullStack will not sponsor applicants for work visas now or in the future.

What We Offer

• Competitive pay.
• 100% remote work.
• The ability to work with leading startups and Fortune 500 companies.
• Continuing education opportunities.
• Opportunity to grow and expand your career.

Our talent network is committed to fostering a diverse, inclusive, and accessible environment where IT professionals can find opportunities that match their skills. We welcome individuals of all races, religions, genders, sexual orientations, national origins, abilities, and experiences. Our focus is on connecting talent with projects based on qualifications, ensuring a fair and transparent process that values diverse perspectives and global collaboration.

Learn more about our Applicants Privacy Notice.