Backend Engineer | Mid-Senior | Go

Okta

Secure Every Identity, from AI to Human Identity is the key to unlocking the potential of AI. Okta secures AI by building the trusted, neutral infrastructure that enables organizations to safely embrace this new era. This work requires a relentless drive to solve complex challenges with real-world stakes. We are looking for builders and owners who operate with speed and urgency and execute with excellence. This is an opportunity to do career-defining work. We're all in on this mission. If you are too, let's talk. We are seeking an independent Senior Software Engineer who effectively balances technical excellence with a disciplined approach to the software development lifecycle. egrity of our environments. What you'll be doing * Design, build, and evolve intelligent customer experience solutions that integrate Salesforce CRM with AWS services and modern generative AI capabilities. * Architect and develop AI-powered experiences using Amazon Bedrock, LangChain, and modern LLM integration patterns to create context-aware, scalable, and customer-facing solutions. * Build robust backend services and integrations to support customer workflows, including LLM orchestration, prompt workflows, RAG pipelines, and other generative AI features. * Lead the design and delivery of complex customer experience initiatives from technical discovery through production deployment, ensuring scalability, reliability, and maintainability. * Develop and refine prompt engineering strategies, grounding approaches, and AI interaction patterns that improve the quality, relevance, and safety of customer-facing AI experiences. * Design and implement resilient APIs, event-driven integrations, and backend services that connect Salesforce, AWS platforms, internal systems, and external applications. * Drive engineering excellence through strong CI/CD practices, using GitHub, Gearset, and deployment automation to support reliable and efficient releases. * Champion observability, operational excellence, and production support practices to ensure enterprise-grade reliability, performance, and supportability of customer-facing systems and AI services. * Mentor junior and mid-level engineers through technical guidance, code reviews, design reviews, and hands-on collaboration, raising the bar on engineering quality across the team. * Lead technical decision-making across architecture, integration design, AI/ML tooling, scalability, security, and long-term platform evolution. * Partner closely with product managers, designers, architects, security, data, and infrastructure teams to ensure solutions are aligned, secure, reliable, and enterprise-ready. * Collaborate effectively in a Scrum-based Agile environment, using Jira and Confluence to drive execution, document decisions, and maintain delivery transparency. * Evaluate emerging AI/ML technologies, frameworks, and engineering patterns, and apply them pragmatically to improve customer experience and operational efficiency.   What you'll bring to the role * 5+ years of professional software engineering experience, with at least 3+ years in customer-facing platforms, enterprise integrations, or CRM-driven systems. * Strong expertise in backend and application development using Python or Java, JavaScrip or TypeScript, with the ability to build production-grade, scalable software systems. * Strong experience designing and building cloud-native solutions on AWS, including services such as Lambda, S3, RDS, API Gateway, and CloudWatch, with a focus on scalability, resilience, and security. * Proven experience integrating LLMs and generative AI capabilities into production-ready applications, ideally using Amazon Bedrock, LangChain, or similar frameworks. * Experience building AI-powered backend services such as prompt orchestration layers, RAG workflows, retrieval pipelines, or other intelligent application patterns. * Strong software engineering fundamentals, including distributed systems design, API development, testing strategies, code quality, and maintainable architecture. * Experience building and supporting CI/CD pipelines, source control workflows, and automated deployments using tools such as GitHub and Gearset. * Ability to lead architecture discussions, influence technical strategy, and make sound engineering decisions across multiple systems and stakeholders. * Demonstrated experience mentoring engineers and helping teams improve engineering practices, technical quality, and delivery maturity. * Strong working knowledge of Agile/Scrum delivery models, and experience partnering across product, engineering, and business teams in sprint-based execution. * Excellent communication skills with the ability to explain complex technical ideas clearly to both technical and non-technical audiences. Nice to have * Deep hands-on experience with Salesforce architecture and development, including Apex, Lightning, Flow, APIs, and data models, with a strong understanding of enterprise CRM workflows. * Experience with advanced prompt engineering, evaluation strategies, and optimization techniques for customer-facing AI applications. * Familiarity with vector databases, embeddings, and Retrieval-Augmented Generation (RAG) architectures. * Experience with LangGraph, LangSmith, agentic workflows, or related frameworks for orchestrating more advanced AI application behavior. * Background in enterprise security, compliance, and data governance , especially as it relates to AI adoption and customer data protection. * Experience with containerization and orchestration technologies such as Docker and Kubernetes . * Exposure to advanced AWS services such as SageMaker, AppConfig, or event-driven architectures. * Track record of leading cross-functional technical initiatives or delivering large-scale platform improvements. What we value * Technical leadership and the ability to guide architecture, influence decisions, and elevate engineering practices across the team. * Strong engineering discipline, with a focus on clean design, maintainable code, observability, testing, and production excellence. * AI curiosity and pragmatism, balancing innovation with responsible, scalable implementation of emerging technologies. * Ownership mindset, taking responsibility from idea to implementation to operational success. * Mentorship and collaboration, with a genuine interest in helping others grow and working effectively across teams and functions. * Customer focus, with the ability to connect technical solutions to better customer and business outcomes. Why join us * Lead innovation at the intersection of enterprise customer platforms and cutting-edge AI technology. * Build intelligent, customer-facing solutions that have direct business impact and improve the overall customer experience. * Shape technical direction for AI-enabled capabilities across Salesforce, AWS, and modern integration platforms. * Work with a team that values engineering excellence, collaboration, and thoughtful adoption of emerging technologies. * Mentor engineers, influence architectural decisions, and play a key role in the evolution of our customer experience platform. #LI-Remote P24733_3364841 Below is the annual salary range for candidates located in Poland. Your actual salary will depend on factors such as your skills, qualifications, and experience. In addition, Okta offers equity (where applicable), bonus, and comprehensive healthcare coverage and financial benefits including paid time off and parental leave in accordance with our applicable plans and policies. To learn more about our Total Rewards program, please visit: https://rewards.okta.com/pol. The annual base salary range for this position for candidates located in Poland is between: 225 000 zł—330 000 zł PLN The Okta Experience * Supporting Your Well-Being  * Driving Social Impact  * Developing Talent and Fostering Connection + Community We are intentional about connection. Our global community, spanning over 20 offices worldwide, is united by a drive to innovate. Your journey begins with an immersive, in-person onboarding experience designed to accelerate your impact and connect you to our mission and team from day one. Okta is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, ancestry, marital status, age, physical or mental disability, or status as a protected veteran. We also consider for employment qualified applicants with arrest and convictions records, consistent with applicable laws. If reasonable accommodation is needed to complete any part of the job application, interview process, or onboarding please use this Form to request an accommodation. Notice for New York City Applicants & Employees: Okta may use Automated Employment Decision Tools (AEDT), as defined by New York City Local Law 144, that use artificial intelligence, machine learning, or other automated processes to assist in our recruitment and hiring process. In accordance with NYC Local Law 144, if you are an applicant or employee residing in New York City, please click here to view our full NYC AEDT Notice.

Sumup

Salary range: 18 850 - 29 660 PLN per month   About the team SumUp’s Point-of-Sale (POS) solution empowers cafes, shops, bars, hair salons, and other businesses to operate efficiently and grow. It offers a wide range of features, including product catalogs, inventory management, business analytics, compliance support, and loyalty tools. Our Fiscalization team will accelerate making the following countries fiscally compliant: Italy, Sweden, Norway, Belgium, Austria, and many other European countries. They will also start building the path for integrating with third parties and fiscalizing receipts. As a Senior Backend Engineer, you’ll collaborate with a dynamic, cross-functional team of Product Managers, Product Designers, Engineering Managers, and fellow engineers. About the role You will be working on secure backend systems to ensure our SumUp’s Point of Sale (POS) products are compliant in the different countries in our roadmap. Furthermore, you will work with the Fiscalization squad to understand the challenge in each market to design a unique solution to delivery. You’re a developer who values user-centric design, precision, and seamless collaboration. You bring structure to communication and thrive in a cross-functional environment.  What you’ll do * Build and maintain fiscal compliance solutions to enable SumUp's expansion across Italy, Sweden, Norway, Belgium, Austria, and other European markets. * Develop integrations with third-party services for receipt fiscalization and regulatory reporting systems. * Navigate SumUp's complex POS ecosystem and master fiscalization frameworks across multiple jurisdictions. * Collaborate with distributed squad members and stakeholders across 5+ cities in a hybrid environment. You’ll thrive in this role if: * You have 5+ years experience in backend engineering with Java and/or Kotlin. * You have a strong understanding of fundamental system architecture, design principles, data modeling, and API design. * You have a strong experience with distributed and fault-tolerant systems. * You have user-level experience working with AWS and Kubernetes. * You have good knowledge of Kafka, Postgres, & CQRS. WHY YOU SHOULD JOIN SUMUP (WARSAW) 🇵🇱 🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced  🚀 Enrolment onto our VSOP program: you will own a stake in SumUp’s future success  🚴 Fitness support: work out on-site at our gym or explore the city using the Multisport Card, subsidised by SumUp for access to sports facilities across Warsaw  🩺 Commitment to well-being: access health insurance coverage for you and your family, plus life insurance to further protect your peace of mind  🏖️ Generous time off: enjoy 26 days of paid leave plus public holidays and special leave days 🌴 Break4me: 1-month sabbatical after 3 years of service  🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team   *Disclaimer The stated salary range represents the expected compensation for candidates who meet the core requirements of this role. Offers above this range may be considered in exceptional circumstances, subject to internal review and approval, where a candidate's qualifications, skills, or experience significantly exceed the role's standard expectations.   Job Application Tip We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.

Readdle

Readdle is a pioneering force in the personal productivity space on Apple devices, having shaped the landscape since 2007. Our mission is to empower individuals and teams with innovative technology, enhancing their efficiency and creativity. We are dedicated to crafting exceptional mobile and desktop experiences for those who aspire to achieve more. The Spark email app stands as one of our flagship products, designed for various platforms, including iOS, macOS, Android, and Windows. Our mission at Spark has always been to make you love your email experience - we started by making email smart, and improved team collaboration, and now we’ve tackled information overload to make email focused. Our core features are designed to heighten your focus and allow you to create customized workflows that suit your needs. About the role: As a Senior Back End Engineer, you will architect robust backend services for tasks like database scaling, synchronisation across devices, and integration with other services (e.g., calendars); and optimise the performance of critical components. You will contribute to the team's growth by mentoring newcomers, conducting code reviews, and fostering a culture of knowledge sharing. What you’ll do: * Build distributed, scalable, and fault-tolerant systems in the cloud using Golang. * Develop tools for running and monitoring the system and ensure reliable operations at optimal performance. * Work closely with the product manager and client development teams to define architecture, protocols, and requirements for new functionalities. * Collaborate with the team and contribute to the overall success of the project About you: * Strong background in backend development, including high proficiency in Golang * Experience with distributed systems and high-load services * Knowledge of relational database systems and key-value stores * Basic knowledge of Kubernetes * Experience with cloud platforms like AWS or GCP * You demonstrate a deep passion for the products you contribute to * You're great at thinking ahead, foreseeing how your work shapes the user experience  * You know how to deliver product quality in optimal development time * You have a keen eye for both zooming in on details and seeing the big picture * You are highly flexible and self-motivated, with the ability to work independently and in a team Would be a plus: * Knowledge of data structures and algorithms (DSA) * DevOps skills  * Familiarity with NoSQL * Experience in front-end development using modern Javascript frameworks * Contributions to the open-source community * Experience with scripting languages like Python, Ruby, Shell What you will get at Readdle: * Customer-centric culture. We put our users at the heart of everything we do. Every team member has the opportunity to engage directly with customers, gaining insights that shape meaningful, delightful experiences for millions worldwide. * Relentless growth. We’re committed to mastery in our craft. We take ownership of our work, decisions, and outcomes, and we see feedback as a catalyst for growth. Every challenge is an opportunity to learn, evolve, and raise the bar. * Exceptional people, exceptional team. Our greatest strength is our people. We care deeply about each other, work transparently, and celebrate collective success. Together, we build an environment where everyone can do their best work and grow beyond their potential. * Real impact. We design products that truly matter. Our focus is on delivering tangible value, simplifying complexity, pushing boundaries, and continuously improving how we build and deliver solutions to our users. * Culture of innovation. We embrace curiosity and creativity in everything we do. Fresh ideas are not just welcomed, they’re expected, celebrated, and turned into real innovations that shape the future of our products and company.